Transcript
Design Assistance Manual Models HV - 50/51/52 HV - 70/71 HV - 100/101 HV - 140
Manufactured By Energy Saving Products Ltd.
Standard ESP 104.03
Table of Contents Preface .......................................................... 2
Fresh Air Make-Up ........................................... 13 Humidifier ......................................................... 13 Fire Stopping ................................................... 13
System Design Vents Locating ............................................................ Kick Spaces ..................................................... Linear Grills ...................................................... Drilled Outlets ................................................... Plenum Runs on Ceiling .............................. Plenum Runs on Sidewall ............................
3 3 4 4 5 5
Fan Coils Placement ........................................................ Counter Flow Position .................................. Hi-Boy Position ................................................ Horizontal Position ....................................... Clearances .......................................................
5 6 6 6 6
Hi-Velocity and Radiant Combination Systems ...................................... 14
Low Temp Water Systems ............................ 14
System Selection Heat Loss/Gain ................................................ 14 Unit Selection ................................................... 14 Average BTUH per outlet ................................. 15 Heating ........................................................ 15 Cooling ........................................................ 15 Difference in Number of vents (heating/cooling) .......................................... 15
House Drawing with Data ............................ 16
Plenum Duct Location ............................................................ Connectors ....................................................... Elbow and Tee Placement ................................ Branch Tees ................................................. Bullhead Tees .............................................. Insulation Sleeve .............................................. Space Saver Take-Offs .................................... Duct Reductions ...............................................
Third Party Options
6 7 7 7 7 7 7 8
Branch Duct Branch Duct ..................................................... 8 De-Rating Values ............................................. 9
Refrigerant Modules
System Layout Vent Placement ............................................... 17 Drawing the plenum ......................................... 17 Drawing Branch runs ........................................ 17 Min & Max lengths ....................................... 17
House Layout ................................................. 18 Appendix A Fan Coil Specifications ..................................... 19
Appendix B Product Specifications ..................................... 20
Refrigerant Module (RCM/RM) ........................ 9 Piping the RCM/RM ..................................... 9 Pipe Sizing ................................................... 9 Refrigerant Pre-Piped Module (RPM) .............. 10 Water Coil Module (WCM/WM) ........................ 10 Piping the WCM/WM .................................... 10 Hot Water Add-on............................................. 10
Electrical Strip Heater...................................... 10 Specifications .................................................. 10
Secondary Drain Pan .................................. 10 Return Air Duct Sizing ....................................................... 11 Location ............................................................ 11 Transitions ........................................................ 11 Return Air Base ................................................ 12 Dimensions .................................................. 12 Filter Rack ........................................................ 12 Dimensions .................................................. 12 Filters ................................................................ 12
Hi-Velocity Fan Coil Systems Fan coil units specified in this section shall be designed as a closed loop hydronic fan coil system, with published BTUH ratings with entering water temperatures set between 110°F and 190°F. System shall allow for heating, TX or chilled water cooling, and heat pump applications with electric coil back-ups. Entering water temperature and BTUH outputs shall match performance listed in Table 01.
Quality Assurance Fan coil units shall be a total indoor air quality system complete with heating, cooling, air filtration, and possibility of humidity control and fresh air make up. The fan coil must be factory manufactured, assembled and tested. All equipment furnished under this specification shall comply with the following standards: ASHRAE
The fan coil units shall be designed, rated and approved by CSA/UL, and shall conform to applicable ASHRAE, ARI and DOE standards.
American Society of Heating, Refrigerating and Air-Conditioning Engineers
ARI
Minimum of 8 outlets per ton cooling. See Table 02 for minimum and maximum per fan coil size.
Air-Conditioning and Refrigeration Institute
CSA
Canadian Standards Association
CE
European Conformity
DOE
Department of Energy
UL
Underwriters Laboratories
The fan coil units shall have pre-wired controls consisting of a 24V transformer and printed circuit board. Circuit board shall be capable of providing both heating and cooling. Motors shall be 115/1/60 with published amp draws. The fan coil unit shall have speed controls for both constant fan and heating operation (HV Series only). Sweat water connections are 1⁄2” Cu for the HV-50, 3⁄4” for the HV-70 and HV- 100, and 1” on the HV-140. All lines should be piped so as not to restrict use of the access panels, filter section, or electrical enclosure. When the potential for gravity flow of the hot water exists, spring check valves may be needed on both the supply and return lines. Sound data documented at 30 dba at each outlet using maximum number of outlets specified, and 40 dba if minimum number of outlets are used. The fan coil unit can be located in a Horizontal, Hi-boy or Counter-flow position and can be suspended from the ceiling or placed directly on the floor. Location of the fan coil will vary depending on the following: length of duct runs, usable floor space, serviceability and accessibility to unit, minimizing structural changes, location of heating/ cooling source, and available space in mechanical room. The main supply duct shall be located either along the main beam(s) in the basement or in the attic space depending on location of fan coil. The supply duct shall be sealed for leaks and covered with R8 insulating sleeve if duct is located in an unconditioned area. Selection of main plenum location shall ensure that the 2” flex duct length is minimized with a maximum run length of 25 ft. Ducting layout to be matched as per the design of Energy Saving Products Ltd., or pre-approved equal.
The Hi-Velocity Systems are not to be used as temporary heating/cooling during the construction of the structure. If used in this capacity all warranties will be null and void.
Table 01 Item HV-50/RCM-50 HV-52/RCM-50 HV-70/RCM 70 HV-100/RM-100 HV-140/RM-100
BTUH
BTUH
@ 190ºF EWT
@190ºF EWT
Kw Electrical Strip
TX Cooling MBH
56,200 55,100 79,700 113,400 150,400
44,400 41,600 62,900 86,300 113,800
5 - 15 Kw N/A 5 - 18 Kw 5 - 23 Kw N/A
18 - 24 18 - 24 30 - 36 42 - 60 60
HV - 51 ratings same as the HV - 50 HV - 71 ratings same as the HV - 70 HV - 101 ratings same as the HV - 100
Table 02 Ø” Supply Air & Max Length
Return Air
Min # Outlets
Max # Outlets
CFM @ 250/ton
HV-50/51
8” Ø - 70’
12”
14
20
550
HV-70/71
8” Ø - 80’
12”
20
29
750
HV-100/101
10” Ø - 100’
14”
30
45
1100
HV-140
10” Ø - 120’
16”
40
50
1250
8” Ø - 50’
10”
8
14
375
2 x 6” Ø - 50’
12”
12
19
550
(1)
Model
HV-52 Medium High
(1)
Ø - Plenum diameter
Maximum length is from the unit to the supply run end cap. More than one run per unit is allowable. Fan coils to be located indoors, however, attic, crawl space and garage conditions are fully acceptable.
Please read the ENTIRE manual before beginning installation as this will help avoid mistakes that may cost time and money.
System Design The following section is basic information needed for the designer. If you would like to learn more about installing the Hi-Velocity System, please read the Hi-Velocity Installation Manual.
Vents With the venturi effect of the Hi-Velocity system, you have more options in vent placement. Each vent has an effective throw of 18’ (Fig. 01) and causes the air to constantly circulate. This allows for vent placement in floors, ceilings, or walls. Fig. 01 illustrates the venturi effect of a single outlet.
Locating Vents Outlets do not have to be located on an outside wall. Due to the venturi action of the Hi-Velocity System, the air in the entire room is gently circulated at all times. The outlets should be located six inches on centre from any possible obstruction (Fig. 02). Fig. 02 - Six inches on center
6”
Fig. 01 - Cone of Influence
6”
Proper location is critical to the operation of the Hi-Velocity System for optimum home comfort. The outlets should be located where it is considered to be a “low traffic area”. Typical areas are in the corner of a room, or to the side of a window or door. When the vents are properly located, the home owner can expect to have a nearly draft free home. Vent placement in outside walls of the structure should be avoided. Flexible duct that is run in outside walls may receive a substantial heat loss/gain. This can result in a higher operating cost for the structure while delivering an inferior air quality.
Installing Vents in Kick Spaces In kitchens and bathrooms, however, it is hard to find a “low traffic area”, so it is recommended to locate the vents in the kick space under the counters. Our Vent plates have a 4” and 5” diameter, which may not fit in all kick spaces without trimming. This can easily be done by trimming the top and bottom of our vent plate so it fits.
The constant circulation is very important to maintain room comfort. Do not install vents under/beside/on-top of objects that may hamper the cone of influence from circulating the room air.
By locating the vents in this position, there will now be horizontal airflow. Caution should be exercised when locating vents in the horizontal position. Avoid placing vents directly below sinks or other locations people will be for extended periods of time.
Linear Grills
Fig. 05 - 6” Apart on center
6”
Installations in areas that have a high heat loss/gain require multiple vents. Multiple vents can be installed into linear grills for a more esthetically pleasing look. Installing in a high sidewall/ceiling or floor makes little difference (Fig. 03).
6”
Fig. 03 - Linear Grills
Installing the vents around the room will allow for the room air to mix. This will give the room a more even air temperature and better distribution. A Straight Vane vent grill is the ONLY type of linear grill that can be used with the Hi-Velocity System (Fig. 04). Fig. 04 - Straight vanes only
Drilled Outlets Caution must to be used when not using the 2” flexible duct, the air velocity from the drilled outlet may create noise. Drilled Outlets CAN NOT be installed in a residential structure; too much noise is generated from the outlets. In commercial areas with large ceilings the sound can be absorbed by the room or is not a concern because of the ambient noises. Drilled outlets are commonly used to supply a large area with heating and cooling. Drilled outlets can also be used to create a pressurized air curtain, for bay doors, or large openings to the outside environment. When drilled outlets are used with the Hi-Velocity System a few points to remember: • When multiple 1” or 2” holes are used, they need to be a minimum of 6” apart on center (Fig. 06). • One 11⁄4” drilled hole is equivalent to a single 2”x10’ AFD kit (2” Rough-In Boot attached to a 10’ piece of flex duct). With the 11⁄4” drilled outlet the throw from the outlet is up to 18’.
When installing multiple vents into linear grills, the vents must be a minimum of 6” on center from each other (Fig. 05). Same rules apply for vents in linear grills as a single outlet installation; see locating vents for more information on vent placement.
• One 2” drilled outlet is equivalent to two - 2”x10’ AFD kits (2” Rough-In Boot attached to a 10’ piece of flex duct). With the 2” drilled outlet the throw from the outlet is up to 30’ in distance. • Using drilled outlets larger than 2” is not recommended; with too large of an opening in the main plenum the static pressure may drop to an unacceptable level.
Fig. 06 - 6” Apart on center
Fig. 08 - 6” airflow parallel to floor
Plenum Runs on Ceiling When drilled outlets are used in a ceiling install, drill the outlets at a 45° angle to properly circulate the room air (Fig. 07). Fig. 07 - Airflow 45° angle to floor
Fan Coils Hi-Velocity Systems Fan coils are manufactured with a direct drive permanent lube motor that is mounted within the blower. All Hi-Velocity Systems fan coils are single side access. The blower assembly can easily be slid out by removing the three mounted bolts that attach it to the center plate. In some instances, the electrical box may need to be removed.
Placement When locating the fan coil keep these points in mind: • Serviceability and access to the unit. • Maximizing usable floor space. • Location of heat/cool source to fan coil. Quite often, the best location for the fan coil unit is suspended from the ceiling of the mechanical room, in the Horizontal position (Fig. 11). This will allow for more floor space in the room, and will minimize the duct work needed to connect to the fan coil unit.
Plenum Runs On Sidewall For sidewall installations the outlets are drilled parallel to the floor (Horizontal airflow). When the vents are in this configuration, they can be used to create a pressurized air curtain.
The fan coil can be installed in many different configurations. It can be located in a Hi-Boy, Counter flow, or Horizontal position. In the Hi-Boy position, the supply air is delivered from the top of the unit (Fig. 09) When placed in the counter flow position, the supply air delivery is from the bottom of the unit (Fig. 10).
Plenum Duct
Fig. 09 - Hi-Boy
Location Fig. 10 - Counterflow
When locating the plenum duct, one of the main factors to consider is the integration of the duct work into the structure. The main supply duct can be located along the main beam(s) in the basement (Fig. 12). Fig. 12 - Basement installation
Min. 18” Fig. 11 - Horizontal The main plenum can also be easily installed in the attic space. (Fig. 13) Fig. 13 - Attic Installation
18”
Clearances Clearance is only needed on the access side of the units. However, ensure that there is a small space between the unit and any other surface to prevent vibration transfer. In order to maintain and service the fan coil unit, the minimum clearances required on the access side are (Table. 03). Table 03 – Fan coil clearances
Unit HV – 50/51/52 HV – 70/71 HV – 100/101 HV – 140
Inches 18” 22” 29” 29”
Add an additional 4” for Electric Strip Coils
If the unit is installed in the attic, make sure that all ducts in the attic are insulated with a vapor barrier (All A/C systems main plenums need to be insulated and vapour barriered). This includes the Branch Take Off and the vent Rough-In Boot. If the duct work is run above the attic insulation, an extra insulation sleeve may be needed. Check your local building code for the ruling in your area. For any duct runs over 75% of the maximum allowable plenum length (Table 02), it is recommended to insulate the main plenum. Insulating the main plenum will cut down on your duct loss, and form a vapor barrier. The attic insulation should be placed over all Hi-Velocity System ducts to further reduce any duct losses.
Main Plenum Connectors There are five types of connections that are possible with the Hi-Velocity System. Fig. 14 - Connectors
Branch Tees When branch tees are used, the plenum split is to be a 70/30 main/branch split (Fig. 16). Fig. 16 - Branch Tee, 70/30 split
1. Tee Connection
Fan Coil
2. Elbow Connection
EXAMPLE 20 VENTS
18” Min.
70% FLOW 14 Vents
3. Reducers 30% FLOW 6 Vents
4. End Cap 5. Straight Connection
Fig. 17 - Bullhead Tee, 50/50 split 50% FLOW (+/- 10%) 10 Vents
Elbow and Tee Placement Elbows and tees must not be placed any closer than 18” from supply outlet on the air handling unit. A significant loss of airflow can result if elbow or tees are installed closer than 18”. Fig. 12 and Fig. 13 illustrate a proper install with at least 18” of straight plenum after the unit supply outlet. Fig. 15 shows the sigma velocity profile of the first 18” of the main plenum and why it’s important to allow the system to equalize air flow.
EXAMPLE 20 VENTS
Fan Coil 18” Min.
50% FLOW (+/- 10%) 10 Vents
Fig. 15 - Sigma velocity profile
Bullhead Tees Uniform Velocity Point 10% Loss
18”
20% Loss 30% Loss
Bullhead tees are to be maintained as close to a 50/50 split as possible, with a maximum 60/40 split (Fig. 17). For the best system performance, keep the number of elbows and tees to a minimum.
Insulation Sleeve Any time the duct will be run in an unconditioned space (attic or crawl space) it must be insulated with a vapor barrier. It’s also recommended to vapor barrier runs that exceed 75% of the total allowable distance (Table 02).
Space Saver Supply Take-Offs The Space Saver model is the same as other Hi-Velocity Systems with the exception of the supply air take-offs. The Space Saver was designed for closer main plenum takeoffs with more take off points. The Space Saver comes with 5 available supply outlet locations. The unit consists of four 6” supply outlets, along with a single 8” outlet at the end/top of the unit (Fig. 19). If elbows, tees, or Branch Take-Offs are placed closer than 18” you may lose up to 30% of your airflow as illustrated in Fig. 15.
When the 8” supply outlet is used, no elbows or tees shall be placed any closer than 18” from the top side of the air handling supply outlet (8” only Fig. 18).
A significant loss of airflow can result if installed closer than 18” (Fig. 15). When using the top 8” supply outlet only that outlet may be used (Fig. 18). Fig. 18 - Space Saver take-offs
When using the 6” outlets, a combination of two 6” outlets may be used at a time, with no more than two 6” take-offs used (Fig. 18). When the 6” outlets are used, elbows and tees may be closer than 18” from the outlet
Any Two 6” take-offs, no 8”
Duct Reductions 8” Only
In some installations, it is necessary to reduce the size of the main plenum. Caution must be used when reducing plenum size, since smaller ducts can handle less number of outlets. The Branch Take Off’s easily form to ducts in the 6” to 8” range; extra care must be taken with smaller sized ducts to ensure a proper air seal. For tee reductions, keep the tee to the full duct size, reducing only after the tee. Keep the length of the smaller duct sizes to a minimum, since the friction loss is much higher. Table 04 – Duct Reduction
Fig. 19 - Space Saver take-offs
Duct Size 4” 5” 6” 7” 8” 10”
# of Vents 4 6 12 19 29 50
Max. Length 30’ 40’ 50’ 60’ 70’ 100’
Branch Duct With both the Main Plenum and Rough-In Boot located, there is now only the connection of the two. This is done with the two inch flexible branch duct. Keep in mind that the minimum duct length is 10 feet (5’ with the Builders and Space Saver), with a maximum length of 25 feet (15’ for Space Saver). Branch duct runs should be kept as short as possible to maximize the airflow through these runs. Energy Saving Products supplies the 2” flexible duct in three different configurations: • 2” x 10’ AFD (Assembled Flex Duct) • 2” x 15’ AFD (Assembled Flex Duct) • 2” x 25’ UFD (Unassembled Flex Duct) (Builders and Space Saver Systems may use a 5’ AFD)
The 2” AFD comes complete with the necessary components for one complete ten foot or fifteen foot branch run. The 2” UFD is to be used only to extend these runs if needed. If extending branch runs longer than the minimum reference Table 05 for adjustment values.
Piping the RCM/RM
Table 05: De-rating Values HV and Builders Series Tubing Length Adjustment Factor
10’ 0%
15’ 20’ 25’ 10% 20% 35%
5’ 0%
10’ 15’ 20’ 10% 20% 35%
Space Saver Series Tubing Length Adjustment Factor
Refrigerant Modules (RCM/RM) The cooling coil comes as a module and must be installed in the vertical position on the return air side of the fan coil. Refrigerant modules come with two L mounting brackets, thermal expansion valve, site glass, two access ports, and an external freeze stat. Figure 20 shows an installed coil assembly and how each piece is connected. Fig. 20 - Coil Assembly
Refrigerant grade pipe and fittings are only to be used with Hi-Velocity Systems. Plumbing fittings may contain wax or other contaminants which are detrimental to the proper operation of the system. Insulate the suction line with 3/8” insulation such as Armaflex. In high heat areas, 1/2” insulation may be needed. If the lines are run in an area where temperatures could exceed 120°F or runs longer than 50’, then the liquid line may need to be insulated as well. Support the pipe every 5 feet, or whatever local code states. Run the pipes in the most direct route possible, taking into account structural integrity and building details. If the evaporator is located above the condenser, slope any horizontal runs toward the condenser. If the condenser is located above the evaporator, a P-trap must be installed at the bottom of the vertical riser. For long vertical risers, additional P-traps must be installed for every twenty feet. For lines running over 50’, a suction line accumulator must be installed. Lines running over 100’ are not recommended.
Pipe Sizing
1
2
Evaporator Coil
Tables 06 and 07 contain line sizing information for the liquid and suction lines. Table 06 – Liquid Line sizes
Tons 3
6
13
8
9 5 12 11
7 4
Distance
1
1 ⁄2
1’–25’
1
⁄4
1
⁄4
5
26’–50’
5
⁄16
5
⁄16
3
51’–75’
3
⁄8
3
⁄8
3
76’–100’
3
⁄8
3
⁄8
1
1
2
21⁄2
⁄16
3
⁄8
3
⁄8
1
⁄2
1
3
⁄8
3
⁄8
1
⁄2
1
⁄2
1
31⁄2
⁄8
3
⁄2
1
⁄2
1
⁄2
1
4
5
⁄8
3
⁄8
1
⁄2
1
⁄2
1
⁄2
⁄2
1
⁄2
1
⁄2
1
⁄2
1
4
5
⁄2 ⁄2 ⁄2
14
10
Table 07 – Suction Line sizes
Tons Distance
1
8) Distributor tubes
1’–25’
5
2) Site glass
9) External equalizer line
26’–50’
5
3) High side access port
10) Suction line 11) Anti-ice control
51’–75’
3
4) Adjustment stem cap
12) Low side access port
76’–100’
3
5) Superheat adjustment stem 6) Thermal expansion valve (TX)
13) TX capillary tube
7) Refrigerant distributor
14) TX sensing bulb
1) Liquid line
R series modules can be used on R-410A condensers; if R-410A refrigerant components are used. All Energy Saving Products R series modules are shipped with R-22 refrigerant components. R-410A is a specialty order and must be stated at time of purchase.
1
1 ⁄2
2
⁄8
3
⁄4
3
⁄4
7
⁄8
7
⁄8
5
⁄8
3
⁄4
3
⁄4
7
21⁄2
⁄4
3
⁄4
3
⁄8
7
⁄8
3
⁄4
3
⁄4
7
31⁄2
⁄4
7
⁄8
7
⁄8
⁄8
1
⁄8
1
1 ⁄8
11⁄8
7
⁄8
11⁄8
11⁄8
11⁄8
11⁄8
11⁄8
11⁄8
11⁄8
11⁄8
11⁄8
The sizes given in the above tables are only for general reference, if the condenser manufacturer requires a different size than specified in Table 06 and Table 07, their sizing shall be used whenever a discrepancy occurs.
Refrigerant Pre-Piped Module (RPM)
Hot water Coil Add-on (HCA)
The RPM comes pre-piped with the coil assembly; the coil assembly is shown in Fig. 20. With the RPM the Liquid and Suction line are the only brazing that need to be done at the fan coil. For charging and brazing, remove the front access panel of the RPM (Fig. 21). With the access panel removed the coil assembly will be accessible. Wet rag the liquid and suction line (or use a heat dissipating paste) to ensure no overheating occurs to the pre-piped coil assembly.
The Hot water coil add-on is easily installed in the Hi-Velocity System. With heating, condensate is not a consideration and the coil can be mounted on the supply side of the blower. With the removal of the front panels, the HCA can be slid in place on the supply side of the blower (Appendix B - Product Sizing).
Install the RPM with the same procedures used per RCM, omitting the coil assembly as it has already been pre-piped.
The Electrical Strip Heater slides into the fan coil, on the supply side of the blower (Appendix B - Product Sizing). Use only wires suitable for 75ºC; wires shall be sized according to local electrical code. Use only class 2 wiring for the Control Circuit connections between the heater terminal 1, terminal 2 and the zone valve terminals.
Fig. 21 - Remove front access panel
Electrical Strip Heater (ESH)
Table 09 – Electrical Strip Heater specifications
Water Coil Module (WCM/WM) The water coil comes as a module and must be installed in the vertical position on the return air side of the fan coil. The WCM/WM come Supplied with two L mounting brackets for connection to the fan coil. For WCM/WM dimensional information and sweat water connection sizes refer to Appendix B.
Piping the WCM/WM When the potential for gravity flow of the hot water exists, check valves may be needed on both the supply and return lines. All lines should be piped so as not to restrict access to the front panels, filter section, or electrical enclosure. Size your supply and return lines according to Table 08.
Kw
Volts/ Phase
# of Feeders and heater
Circuit Breakers
5
240/1
1 x 20.8
1 x 30A
10
240/1
1 x 41.6
1 x 60A
15
240/1
1 x 20.8 1 x 41.6 1 x 30A 1 x 60A
18
240/1
1 x 41.6 1 x 41.6 1 x 60A 1 x 60A
20
240/1
2 x 41.6
2 x 60A
23
240/1
2 x 47.0
2 x 60A
Electrical Strip Heater (ESH) Some building codes call for a secondary drain pan under the entire unit (Fig. 22). Any installation that has the potential of property damage due to condensate must have a secondary drain pan installed. If the unit is installed in a high heat and/or high humidity location, extra insulation around the unit casing may be required. This will prevent excessive condensate from forming on the outer surface of the casing. Fig. 22 - Secondary drain pan
Table 08 – WCM/WM pipe sizing Zone BTUH Heat loss
Pipe Size up to 40 feet
0 - 35,000
5
35,001 - 70,000
3
70,001 - 140,000
Pipe Size 40 – 100 feet
⁄8”
3
⁄4”
⁄4”
1”
1”
1 1⁄4”
P-Trap Secondary drain pan
10
Fig. 23 - Return air location
Return Air The return air duct is not supplied with the Hi-Velocity System. It is to be supplied and installed by the contractor. The return air and fresh air make-up ducts are to be installed according to local building code.
Legend RA - Return air
The first five feet of the return air duct from the air handling units is to be acoustically lined for sound absorption. This only applies on short return air duct work of less than 10 feet. For traditional house return air using a combination of return air metal duct and joist liners this does not apply.
Duct Sizing The return air is to be sized on a 0.15 static pressure as compared to 0.10 static pressure for conventional forced air systems. The maximum length for an individual return air duct is fifty feet. Table 10 – Return Air duct sizes Unit
Round Duct
Square Inches
HV-50/51/52 H/BU HV-70/71 H/BU
12”
113
HV-100/101 H/BU
14”
154
HV-140 H/BU
16”
201
When sizing the return air ducts, keep in mind that if they are too small they can create noise, but if they are too large, the fan coil cannot build up proper pressure. Table 10 has recommended return air sizes for round and rectangular ducts. A variance of plus/minus 20% is allowable for sizing return ducts that connect to the Hi-Velocity Systems unit. It is recommended to install a grill that is 10 - 20% larger than specifications require, this will ensure that there is no air velocity noise at the grill. Where allowed by local codes, a single return air grill may be used. When using flexible duct for return air, use one duct size larger due to the higher friction loss.
Note: • DO NOT cut past the center plate or electrical box (Dim A & B). • Model HV-100 and HV-140 CANNOT use return air “C” (RA-C). • This drawing is NOT to scale.
Fig. 24 – Return air transition
Return Location Fig. 23 shows the different locations the return air can be installed on Hi-Velocity Systems. Table 10b contains the dimensions needed for the return cutout. All fan coils are shipped with a Return Air Cutout template; the template will guarantee maximum airflow across the coil. Table 10b – Return air cutouts Model
A
B
C
D
HV-50/51/52 H/BU HV-70/71 H/BU HV-100/101 H/BU HV-140 H/BU
3” 3” 3” 3”
17” 17” 17” 17”
10” 15” 22” 22”
14” 15” 15” 15”
HV-140 sizing based upon RCM Cooling Module
A round or square return air duct can be used; they must be sized for the Hi-Velocity Systems according to table 10. Before the return air can be attached to the transition (Fig. 24), the first five feet (from the fan coil) is to be acoustically lined for sound absorption.
11
Return Air Base (Optional)
Fig. 26 – Filter Rack Design
Energy Saving Products manufactures a return air base with a built in filter rack that matches up to the fan coil units. The return air base comes complete with a one-inch filter and one-inch filter rack. The filter is a 3 medium filter approximately 14% efficient, and can be replaced with any aftermarket filter. All the Return Air bases come acoustically lined with half-inch sound absorbing insulation.
Two 11⁄8” Rails (D) for fan coil Placement and Filter Holder
D
11⁄8” Flange (on each side)
Fig. 25 – Return Air Design Two 11⁄8” Rails (D) for fan coil Placement and Filter Holder
C
A B
11⁄8” Opening
E
D
A
C
11⁄8” Opening
Table 12 – Filter Rack dimensions A
B
C
D
HV-50/51/52
3”
18½”
14½”
11⁄8”
HV-70/71
3”
18½”
19½”
11⁄8”
HV-100/101
3”
18½”
25½”
11⁄8”
HV-140
3”
24½”
26½”
11⁄8”
Filters
B Table 11 – Return Air Base dimensions
Energy Saving Products filters are 1 inch thick, 3 medium filters approximately 14% efficient. Any after market filter may be used with both the Hi-Velocity Return Air Base and Filter Rack.
A
B
C
D
E
HV-50/51/52
24”
1
18 ⁄2”
1
14 ⁄2”
1
1 ⁄8”
213⁄4”
Table 13 – Filter Part Numbers
HV-70/71
24”
1
18 ⁄2”
1
19 ⁄2”
1
1 ⁄8”
3
21 ⁄4”
FR/RA-50/51
10050900050
HV-100/101
24”
181⁄2”
251⁄2”
11⁄8”
213⁄4”
FR/RA-70/71
10050900070
HV-140
24”
241⁄2”
261⁄2”
11⁄8”
213⁄4”
FR/RA-100/101
10050900100
FR/RA-140
10050900100
Filter Rack (Optional) Also available from Energy Saving Products is a 3” Filter Rack, supplied with a one-inch 3 medium filter approximately 14% efficient, and can be replaced with any aftermarket filter.
12
Third Party Options Fig. 27 – Fresh Air Make up
Exterior Intake
Insulated Fresh Air Intake
Adjustable Damper
P-Trap
Not directly into the air stream, more than 5’ away from fan coil to allow fresh air to mix with the return air. A P-Trap should be installed to stop the migration of air.
Fresh Air Make-Up
Humidity Control
For areas that require fresh air make-up, a small intake may have to be installed. It is recommended to install an insulated flex duct, with a damper, into the return air plenum. The damper can then be adjusted to supply the exact amount of fresh air needed to meet local building codes (Fig. 27). This should be balanced to the exhaust air levels of the structure.
When a bypass type humidifier is used, the humidifier can be mounted on the return air duct, and then a two inch take-off from the hot air side is run back (Fig. 28). DO NOT use any size larger than two inch, and be sure to install a summer shut-off, or it will create problems with the airflow. When installing a steam humidifier install on the return side of the unit.
Install the fresh air duct to the side of the return air and if possible not directly into the air stream. As shown in Fig. 27, the fresh air duct has been installed more than 5’ away from the fan coil and before a 90º bend. If too large of a duct is installed, the excess fresh air will increase system operating costs and decrease system performance.
Fire Stopping Some areas require a Fire Stopping device to stop the spread of a fire and/or prevent the duct system from supplying oxygen to the fire. The Hi-Velocity System can be used in conjunction with several types of Fire Stopping devices. With our Rough-In Boots, Metacaulk pipe collars work very well; figure 29 gives an illustration of a pipe collar used with the Rough-In Boot. Many options are available to the designer, if assistance is needed in product choice. Call our representatives at Energy Saving Products for technical advice.
Fig. 28 – Humidifier
18”
Fig. 29 – Fire Stopping Devices
Lots of Choices • • • •
Pipe Collars Wrap Strips Mechanical Shut offs Call ESP for Advice
13
Combination Hi-Velocity and Radiant One of the benefits of using a hydronic system is the versatility that you have when designing the heating system. Radiant floor heating is an excellent system, but it does have limitations. You cannot have cooling, air filtration, and humidification with a straight radiant heating system. Similarly, sometimes a forced air system is not the only option available for a house, especially if it has a lot of ceramic tile or concrete floor areas. In the sample house included, radiant floor heating would be unable to meet the requirements to heat the nook. With the Hi-Velocity System, we can heat this room, but would have an excessive number of outlets in a small area. Fig. 30 - Nook Example Room: Nook Heat loss: 8,326 BTUH Number of Vents: 4
Low Water Temperature Systems When running Hi-Velocity Systems from a low water temperature system (eg. A hot water tank), care must be taken when designing and installing the system. Due to the lower water temperature there will be less BTUH’s and therefore a lower supply air temperature, it is imperative that the water temperature is known at the design stage. If possible the highest temperature setting should be used, and a water tempering valve installed for the domestic use. The higher water temperature will increase system efficiencies, and the water tempering valve will reduce the risk of scalding. Since some areas have specific regulations regarding combo systems, please check your local building code for details on water tank temperatures, tempering valves, and pump timers. Due to the lower air temperatures, when running the ductwork in an unconditioned space, the main plenum must be insulated and vapour barriered. Extra insulation should also be used in order to maintain a reasonable leaving air temperature at the vents.
System Selection Heat Loss/Gain To size a Hi-Velocity System for a residence, it is necessary to have an accurate heat loss/gain done for the structure. This will ensure the proper equipment is used for cooling and heating. A heat loss/gain is done for each room, which will give a total BTUH load for the structure. Table 14 - Example Data for Fig. 31
It is in rooms such as this that a hybrid system of both radiant heating and Hi-Velocity Systems would be the optimum system to provide comfort conditioning. This will provide the home owner with good indoor air quality, and warm floor comfort (not as effective if carpet is laid down). A common approach to a hybrid system is to heat the basement with radiant tubing. The main floor and 2nd floor if applicable would be heated with the Hi-Velocity System. A few outlets can also be placed in the basement to provide air circulation, and supplementary heating if required.
14
Room Name
BTUH Loss
BTUH Gain
Nook Kitchen Bath Bed #1 Bed #2 Dining Rm. Foyer Family Rm. Master Bed M.Bath/WIC
8,326 2,539 1,114 2,667 3,845 5,109 4,186 5,859 9,326 2,786
5,233 1,688 693 1,592 2,165 3,802 2,166 4,001 6,046 1,193
Totals
45,757
28,579
The design factors used to achieve this heat loss/gain are shown on Fig. 31.
Unit Selection With the total load known for the structure, it is now possible to select the proper Hi-Velocity unit (Appendix A or Table 01).
Example: 4 x 2,952 BTUH = 11,808 BTUH (11,808 > 8,326 Heating requirements satisfied)
Table 15 – Selected fan coil
Selected fan coil: Entering Water Temp House Heat Loss: House Heat Gain: Minimum Outlets: Maximum Outlets Selected Condenser
A room (Nook) that has a heat loss of 8,326 BTUH and a heat gain of 5,233 BTUH will need 4 vents.
HV-70 H 180°F 45,757 BTUH 28,579 BTUH 20 29 2.5 ton
4 x 1,200 BTUH = 4,800 BTUH (4,800 < 5,233 Cooling requirements not satisfied) The heating checks out but the cooling doesn’t in this example. We allow a 0.1 variance on vent checks, which gives a little leeway with vent placement. Also with the kitchen being an adjoining room with an extra 712 BTUH it will help the nook maintain the desired temperature
Average BTUH per Outlet Once the unit has been selected, the average numbers of outlets can be determined (Table 02 or Appendix A). To determine the average number of vents, the minimum is added to the maximum and divided by two.
Table 17 - System Check Heating Fan Coil Output Heating
House BTUH Loss
Fan Coil Output Cooling
House BTUH Gain
Nook
11,808
8,326
4,800
5,233
Kitchen
5,904
2,539
2,400
1,688
Bath
2,952
1,114
1,200
693
Bed #1
5,904
2,667
2,400
1,592
Bed #2
5,904
3,845
2,400
2,165
Dining Rm.
8,856
5,109
3,600
3,802
Foyer
5,904
4,186
2,400
2,166
Family Rm.
8,856
5,859
3,600
4,001
Master Bed
14,760
9,326
6,000
6,046
M.Bath/wic
2,952
2,786
1,200
1,193
Totals
73,800
45,757
30,000
28,579
Example: (Min Outlets (20) + Max Outlets (29)) / 2 = 25 With the average number of vents known it is now possible to determine the average BTUH output per vent. Dividing the average number of outlets into the fan coil output (Table 02 or Appendix A) will give an average BTUH output per vent. Example: BTUH per Outlet for HEATING 73,800 BTUH / 25 = 2,920 BTUH/OUTLET (2,952 BTUH delivery per outlet for Heating) BTUH per Outlet for COOLING 30,000 BTUH / 25 = 1,200 BTUH/OUTLET (1,200 BTUH delivery per outlet for Cooling) The BTUH per outlet is then used to figure out how many outlets are required for each room. As an example, here is a room by room load calculation for the house plan included (Fig. 31). Table 16 – Number outlets per room
Cooling
Not all rooms will check out for cooling as illustrated in Table 17, we allow a 0.1 variance on vent checks per room. The Main concern is the total unit output being higher than house BTUH loss. With the venturi action of the Hi-Velocity System the individual rooms will affect each other and help maintain the desired room temperature.
Room Name
BTUH LOSS
BTUH GAIN
Number of Vents
Difference in Number of Vents Needed for Heating and Cooling
Nook Kitchen Bath Bed #1 Bed #2 Dining Rm. Foyer Family Rm. Master Bed M.Bath/WIC
8,326 2,539 1,114 2,667 3,845 5,109 4,186 5,859 9,326 2,786
5,233 1,688 693 1,592 2,165 3,802 2,166 4,001 6,046 1,193
4 2 1 2 2 3 2 3 5 1
Totals
45,757
28,579
25
There may be cases when the number of outlets needed for heating is significantly different than the amount needed for cooling. This is usually caused by a large appliance load or an excessive amount of windows. If this happens you will have to use the greater number of outlets to provide both heating and cooling for the room. The vents have dampers and can be adjusted for individual room comfort. In cooling mode the outlets must be in the fully open position or there will be a loss in performance and the efficiency of the system.
15
Fig. 31 - House Drawing Design Factors for ESP’s heat calc program Air change/Hour 0.3 Altitude above sea level (ft) 1500 Outdoor Heating temp (ºF) -15 Outdoor Cooling DB temp (ºF) 95 Humidity 40% Glass Cold floor area Exposed ceiling Standard doors Glass doors Exposed wall Construction
Double/Coated 0.46 R-20 Insulation (6”) R-40 insulation (12”) 1” solid core High Eff. Patio door R-20 Insulation (6”) New
Garage
4’ x 6’
All ceiling heights are 9’ Fan coil and main plenum will be located in the crawl space Glass door 6’ x 7’
Wood Door 3’ x 7’ 2’ x 6’
Nook 15’ x 14’
Dining Room 21’ x 11’
4’ x 6’ 2’ x 6’
2’ x 3’ 2’ x 3’ 2’ x 3’
Kitchen 13’ x 11’
2’ x 3’
Bath 11’ x 6’
Foyer 21’ x 10’
1’ x 6’ Wood Door 3’ x 7’ 1’ x 6’
2’ x 6’ Family Room 21’ x 16’
4’ x 6’ 2’ x 6’
3’ x 4’
Bedroom #1 11’ x 13’
• This drawing is not to scale. • This is an example only and may not reflect an actual heat loss/gain.
3’ x 4’
2’ x 6’
Bedroom #2 14’ x 13’
MB/W.I.C. 10’ x 18’
Master Bedroom 17’ x 22’
2’ x 6’
Glass door 3’ x 7’ 4’ x 4’
16
4’ x 4’
4’ x 6’
4’ x 4’
System Layout With the total vents known, the layout of the Hi-Velocity System can now be done. Start with individual vent placements (if you haven’t already read the section on Vents in System Design, please do so before starting). Then place the main plenum so the flex runs will be the shortest length possible. With the plenum placed, the flex runs can be drawn connecting the vent outlet to the main plenum.
Drawing Vent Placement To demonstrate a vent layout, we’ll place 4 vents to properly condition the Nook (Fig. 32). From table 16 we calculated that the Nook has a Heat loss/gain of 8,326/5,233, which will require 4 vents to satisfy heating and cooling requirements. Fig. 32 - Placing Vents: Nook
Drawing the Plenum For this layout we have chosen to use a Main Plenum with a 56/44 bullhead tee (Fig. 17) split. On one side 14 vents will used, while 11 will be used on the other. This is allowable as we can use a Bull Head Tee up to a 60/40 split. If the split is greater than 60/40, a Branch Tee (Fig. 16) should be used instead of the Bullhead Tee. With a 56/44 split we will be able to reach all vents using standard 10’ and 15’ flex runs. If you have to extend the flex runs longer than 10’ (HV and Builders series) reference Table 05 for adjustment factors. Space Savers series minimum length is 5’, and adjustments must be made from table 05 if extending flex runs longer than 5’. The main plenum we choose to use is 8”, it is not required to use 8” for the whole run. If space or cost is a concern, the main plenum can be reduced down to a smaller size. If reducing the plenum, reference Table 04 for allowable length and maximum number of vents for the size chosen. Never reduce at a bullhead tee, always reduce after the bullhead tee or you can lose approximately 20% of your airflow.
Drawing the Flex Runs 4 Vents distributed evenly throughout the space.
Once the vents and plenum have been drawn in, the two may now be connected with the 2” flexible branch duct. The minimum flex run is 10’ (5’ Space Saver and Builders series) and the maximum is 25’ (15’ space Saver). Builders and Space Saver series are different than the Hi-Velocity System, the minimum and maximum allowable flex lengths can be referenced from Table 17.
Table 17 - Allowable Branch Duct Lengths With this room 3 vents would have satisfied the heating requirements, but would not satisfy the cooling requirements. For the nook we need 4 vents for cooling, so 4 vents must be placed in the nook. The vents do have an adjustable damper and can be adjusted for individual room comfort if too much heating is being supplied. In cooling mode the outlets must be in the fully open position.
Model HV Builders Space Saver
Min. Length
Max. Length
10’ 5’ 5’
25’ 25’ 15
The outlets should be located where it is considered to be a “low traffic area”. Typical areas are in the corner of a room, or to the side of a window or door. When the vents are properly located, the home owner can expect to have a nearly draft free home. Once all the vents have been placed in each room, the main plenum can now be drawn. Fig. 33 shows where all vents have been located in the individual rooms.
17
Fig. 33 - House Layout
Legend Vent Main Plenum 2” Flexible Branch duct Vent in Kick Space
56% split 14 vents
Vent installed in the Kick Space
Fan coil in Crawl space
8” Main Plenum
44% split 11 vents
Branch Ducts to be installed 18” from elbows, tees, end caps
18
Appendix A – Hi-Velocity Fan Coil Specifications Hi-Velocity Specifications
HV-50/51
HV-52
HV-70/71
HV-100/101
HV-140
BTUH @ 190°F E.W.T.
56,200
58,636
79,700
113,400
150,400
BTUH @ 180°F E.W.T.
52,300
54,042
73,800
105,000
138,200
BTUH @ 170°F E.W.T.
48,500
49,455
67,500
95,500
126,000
BTUH @ 160°F E.W.T.
44,400
44,877
62,900
86,300
113,800
BTUH @ 150°F E.W.T.
41,500
40,309
55,000
77,000
101,600
BTUH @ 140°F E.W.T.
37,500
35,753
49,500
68,700
89,500
BTUH @ 130°F E.W.T.
32,700
31,210
44,500
59,300
77,400
BTUH @ 120°F E.W.T.
29,500
26,682
38,000
49,600
65,300
BTUH @ 110°F E.W.T.
23,200
22,171
30,000
37,200
53,300
Electrical Strip Heater
5 - 15 Kw
N/A
5 - 18 Kw
5 - 23 Kw
N/A
TX Cooling MBH(1)
18 - 24
18 - 24
30 - 36
42 - 60
60
BTUH @ 44°F E.W.T.
24,400
23,700
35,000
51,000
57,900
BTUH @ 42°F E.W.T.
26,000
25,400
37,800
55,000
62,900
C.F.M. @ 1.5” E.S.P.
550
550
750
1100
1250
HP - RPM
1/4 - 1625
1/4 - 1625
1/3 - 1625
1/2 - 1625
3/4 - 1625
AMPS @ 115/1/60
4.5 (High)
4.5 (High)
5.0
7.5
8.5
5
5
7
10
10
8” - 80’
10” - 100’
10” - 120’
12”
14”
16”
G.P.M. FLOW RATINGS
R/A SIZE NEEDED
12”
2 x 6” or 1 x 8” 50’ 12”
MINIMUM OUTLETS(2)
14
8
20
30
40
MAXIMUM OUTLETS
20
19
29
45
50
S/A SIZE & MAX. LENGTH
E.W.T. E.S.P. G.P.M. HP MBH RPM R/A S/A TX
8” - 70’
Entering Water Temperature External Static Pressure Gallons Per Minute Horse Power Thousand British Thermal Units per Hour Revolutions Per Minute Return Air Supply Air Thermal Expansion
1. Smaller condensers may be matched to the fan coil when needed (match TXV to condenser size). 2. Minimum number of full outlets per ton of cooling needed.
19
Appendix B – Product Sizing Item
Length
Width
Height
A
B
C
HV-50/51 H/BU
32 ⁄16”
14 ⁄2”
18 1⁄4”
HV-52 H/BU
30 1⁄2”
18 1⁄2”
14 1⁄4”
HV-70/71 H/BU
32 5⁄16”
19 1⁄2”
18 1⁄4”
HV-100/101 H/BU
32 5⁄16”
25 1⁄2”
18 1⁄4”
HV-140 H/BU
38 ⁄2”
26 ⁄2”
24 1⁄4”
Fan coils
Refrigerant Modules
5
1
1
1
G
E
F
RCM-50
14 3⁄8”
10 1⁄8”
18 1⁄2”
1
RCM-70
19 ⁄8”
1
10 ⁄8”
18 ⁄2”
1
RM-100
25 ⁄8”
7”
18 ⁄8”
5
RM-140
25 ⁄8”
7”
18 ⁄8”
5
3 3
3
1 3
3
J
K
⁄2”
7
⁄2”
7
⁄8”
⁄8”
7
⁄8”
7
⁄8”
⁄8” ⁄8”
There is no difference between the RM-100 and RM-1400
Water Cooling Modules
G
E
F
WCM-50
14 3⁄8”
10 1⁄8”
18 ½”
3
WCM-70
19 ⁄8”
1
10 ⁄8”
18 ½”
3
WCM-100
25 ⁄8”
7”
18 ⁄8”
3
WCM-140
26 1⁄4”
8”
22 5⁄8”
1”
1”
B
D
C
5
Heating Coil Add-on
3 3
3
J
3
⁄4”
3
⁄4”
3
HCA-50
13 ⁄2”
5 ⁄8”
16”
HCA-70
19”
5 1⁄2”
16”
3
HCA-100
25”
1
5 ⁄2”
16”
3
HCA-140
25 ⁄8”
6”
22”
1”
7
⁄4” ⁄4” ⁄4”
H 1
1
K
⁄4”
I
⁄2”
1
⁄4”
3
⁄2”
⁄4”
3
⁄4” ⁄4”
Heating Coil Add-on does not come as a module, it slides into the Hi-Velocity fan coil
Electrical Strip Heater
B
D
C
HV-650
13 ⁄4”
5
5 ⁄8”
15 1⁄2”
HV-750
18 3⁄4”
5 5⁄8”
15 1⁄2”
HV-1100
24 ⁄4”
5 ⁄8”
15 1⁄2”
3
3
5
Dimensions for the ESH do not include the electrical access panel, add 4” to ESH for Total Length
Refrigerant Pre-Piped Module
20
G
F
E
RPM - 50
17”
18 ⁄2”
10”
1
RPM - 70
23 1⁄4”
10 1⁄8”
18 1⁄2”
1
RPM - 100
29”
10 1⁄8”
18 1⁄2”
5
1
⁄2”
7
⁄2”
7
⁄8”
⁄8”
7
⁄8” ⁄8”
Energy Saving Products Ltd., established in 1983, manufactures the Hi-Velocity Systems product line for residential, commercial and multi-family markets. Our facilities house Administration, Sales, Design, Manufacturing, as well as Research & Development complete with an in-house test lab. Energy Saving Products prides itself on Customer Service and provides design services and contractor support.
Comfort from floor to ceiling, Satisfaction from room to room, with
It’s not just a dream, it’s reality.
Phone: Fax: Toll Free:
(780) 453-2093 (780) 453-1932 1-888-652-2219
www.hi–velocity.com
ESP 104.02
