Transcript
4510 Helgesen Drive, Madison, WI, 53718 608.221.4499, 800.627.4499, Fax: 608.221.2824
[email protected] www.renewaire.com
APPLICATION, ASSEMBLY AND OPERATION MANUAL
MODELS PA6X, PA8X, PA9X, PA12 Covered by US Patent 5,660,228
RISK OF FIRE, ELECTRIC SHOCK, OR INJURY. OBSERVE ALL CODES AND THE FOLLOWING CAUTIONS! 1. Before servicing or cleaning the unit, switch power off at disconnect switch or service panel and lockout/tag-out to prevent power from being switched on accidentally. More than one disconnect switch may be required to de-energize the equipment for servicing. 2. This installation manual shows the suggested installation method. Additional measures may be required by local codes and standards. 3. Installation work and electrical wiring must be done by qualified professional(s) in accordance with all applicable codes, standards and licensing requirements. 4. Any structural alterations necessary for installation must comply with all applicable building, health, and safety code requirements. 5. Electrical equipment connected to this unit must be properly grounded. 6. Sufficient air is needed for proper combustion and
exhausting of gases through the flue (chimney) of fuel burning equipment that might be installed in the area affected by this equipment. If this unit is exhausting air from a space in which chimney-vented fuel burning equipment is located, take steps to assure that combustion air supply is not affected. Follow the heating equipment manufacturer’s requirements and the combustion air supply requirements of applicable codes and standards. 7. Use the unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer. 8. This unit is intended for general ventilating only. Do not use to exhaust hazardous or explosive materials and vapors. Do not connect this unit to range hoods, fume hoods or collection systems for toxics. 9. This unit must be properly ducted to the outdoors. Outside air inlets must not be located where air may be contaminated, for example by vehicle or appliance exhausts. 10. Use the unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer at 800-627-4499.
Due to continuing product development, specifications are subject to change without notice.
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HOW TO USE THIS MANUAL
This manual is in three sections: 1 System design 2 Assembly 3 Owner’s information Both the system designer and the equipment installer should review the first two sections. SYSTEM DESIGN
ATTENTION INSTALLER:
DIMENSIONS ·······································3 DESIGN CONSIDERATIONS···············4 AIRSTREAM AND FILTER ARRANGEMENTS ·······························8
The PA-series energy-recovery units are available either factory-assembled or knocked-down for on-site assembly. If the unit is received pre-assembled please be sure to: x review the FORKLIFT INFORMATION section;
ASSEMBLY PARTS LIST ·········································6 ASSEMBLY: Stack energy recovery cores ···········8 Install end panels···························11 Square up and connect cores, spacers and end panels ················12 Assemble twinned filter(s) ·············13 Install filter racks····························14 Install side panels ··························16 Install top duct flange·····················18 Install end top bars ························19 Install duct flanges·························20 Install top bar·································22 Screw side panels to cores············23 Install doors ···································24 Final caulking and checkout ··········25 FORKLIFT INFORMATION ················26
x
review the WARNINGS in the SYSTEM DESIGN section.
If YOU are assembling the unit please be sure to: x review the safety warnings on the cover; x
see “Airflow Direction and Filter Locations” before starting;
x
review the FORKLIFT INFORMATION section.
Throughout the assembly instructions, we refer to the “two-stack” and “three-stack” models, and also to “three-high” and “fourhigh” models. See table below:
OWNER’S INFORMATION OPERATION ······································ 31 MAINTENANCE ································· 32
Three-high Four-high
Two-stack PA6X PA8X
Three-stack PA9X PA12X
Due to continuing product development, specifications are subject to change without notice.
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DIMENSIONS
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Due to continuing product development, specifications are subject to change without notice.
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SYSTEM DESIGN – GENERAL
FUNCTION The patented RenewAire PA6X, PA8X, PA9X and PA12X modular energy-recovery units are used to transfer energy from exhaust air leaving a building, into fresh air being brought in from the outside for ventilation. By recovering energy from the exhaust airstream, the benefits of ventilation can be enjoyed without the full energy cost to condition the outside air.
INDOOR USE ONLY The unit is designed for installation in a sheltered location, out of the weather.
LOCATE TO MINIMIZE DUCT LENGTH The ideal location for the unit is: x central to the inside duct runs; x close to both the exhaust duct (to the outside) and the fresh air duct (from the outside).
PROVIDE SERVICE ACCESS The top of the unit must be accessible for cleaning and filter replacement. See dimension drawing on page 3.
SPECIAL CONSIDERATIONS FOR OUTSIDE AIR AND EXHAUST AIR DUCTS Proper location and construction of these ducts are critical to the safety and proper function of the system. The exhaust outlet and outside air inlet on the outside of the building should be separated to avoid cross-contamination. Danger of carbon monoxide poisoning! Outside air intake should be 10’ (minimum) away from sources of carbon monoxide or other toxic gasses such as chimneys, furnace and water heater exhausts. Do not locate outside air intake where vehicles may be serviced or left idling. Do not locate the outside air intake inside an enclosed space. NOTE: Some jurisdictions may allow less separation, or may require more. Check with your local code officials! NOTE: The exhaust outlet should not dump air into an enclosed space or any other structure. The inlets and outlets should be screened against insects and vermin and shielded from the weather to prevent the entry of rain or snow.
SPECIFY AND PROVIDE BLOWERS The PA-series energy-recovery units do not include blowers. Therefore, two blowers must be installed as part of the system. Several ducts must also be installed. See “Blower Design Issues” below.
PROVIDE SYSTEM SHUT-OFF MEANS FOR SAFETY Provide a nearby Disconnect Switch so service people can shut off the blowers connected to the system when changing filters.
FOUR DUCTS ARE REQUIRED x x x x
OUTSIDE AIR DUCT handles Supply Air entering the energy-recovery unit. FRESH AIR DUCT handles Supply Air leaving the energy-recovery unit. RETURN AIR DUCT handles Exhaust Air entering the energy-recovery unit. EXHAUST AIR DUCT carries the Exhaust Air from the energy-recovery unit to the outside of the building.
CAUTION DANGER OF DAMAGE DUE TO CONDENSATION IN OR ON DUCTS TO OUTSIDE. Both ducts connecting the unit to the outside must be insulated with sealed vapor barriers inside and out to prevent condensation and/or freezing inside the insulation or on the duct surface.
SELECT THE AIRFLOW PATH CONFIGURATION Four basic airflow configurations are possible with the PA unit. See “AIRSTREAM AND FILTER ARRANGEMENTS” (pages 8 & 9).
CAUTION SOME AIRFLOW ARRANGEMENTS RESULT IN LOWER ENERGY-RECOVERY PERFORMANCE AND REQUIRE DERATING.
DESIGN THE PLENUMS Duct plenums will be required, equal to the face width of the PA unit. See dimension drawing on Page 3. In some cases the plenums may reduced to the size of the unit inlet openings. Design the plenums for low velocity to minimize pressure drop and achieve good airflow distribution into the unit.
Due to continuing product development, specifications are subject to change without notice.
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SYSTEM DESIGN – BLOWER DESIGN ISSUES
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BLOWER LOCATION Two blowers will be required: one for the air to be exhausted from the building, another for the fresh air to be brought into the building. The following diagrams show the possible locations.
FIGURE A – PUSH-PUSH BLOWER LAYOUT RECOMMENDED
FIGURE C – OA PUSH – EA PULL BLOWER LAYOUT CAN BE USED WITH CAUTIONS
PUSH-PUSH AND PULL-PULL BLOWER LAYOUTS:
OA PUSH - EA PULL BLOWER LAYOUTS:
These are the recommended blower layouts for virtually every application. In "Push-Push" applications, both blowers push into the energyrecovery unit (Fig. A). In "Pull-Pull" applications, both pull from the unit (Fig. B). These layouts minimize leakage between the airstreams due to pressure differences.
This blower layout (Fig. C) causes the supply airstream to be at a much higher static pressure than the exhaust airstream. This may result in air leakage, which must be evaluated in the design process. A benefit of this layout is that both blowers are isolated from the building’s duct system by the energy-recovery unit, which provides some acoustic attenuation. The designer should always evaluate static pressure differentials between the airstreams if this layout is used. See “STATIC PRESSURE DIFFERENTIALS”, page 7.
FIGURE B – PULL-PULL BLOWER LAYOUT RECOMMENDED
FIGURE D – RA PUSH – FA PULL LAYOUT NOT RECOMMENDED
Due to continuing product development, specifications are subject to change without notice.
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SYSTEM DESIGN – BLOWER SIZING
BLOWER SIZING
BLOWER INLET AND OUTLET CONDITIONS
SEE CHART FOR PRESSURE DROP through the PA energy-recovery units (Fig. E). The chart does not include allowances for inlet/outlet plenums, which are not included with the unit. The chart includes pressure drop through clean filters.
As in all applications of blowers in air-handling systems, improper duct design at the inlet and outlet of the blowers can greatly reduce blower performance compared to its published ratings.
In general, ventilation systems with energy-recovery components use blowers operating at relatively high static pressure. Thus, parts of the duct system will be at higher-than-ordinary static pressures, and greater duct leakage may result. It is good practice to select blowers and motors that can be operated at total static pressures than required by the nominal design. This provides a solution in the event that total system pressure drop is higher than expected. Note that this means proper system balancing and commissioning becomes even more important, in order to prevent operation at higher-than-required airflows.
CAUTION The Maximum Pressure Differential between the either inlet or either outlet of the energy-recovery unit should not exceed 4 inches (H2O).
Complete guidelines on blower applications are beyond the scope of this document. The most basic guidelines are: AT THE BLOWER OUTLET: x Design a gradual transition to the final duct size. x Included angle between the transition elements should not exceed 7°. x Transition length should be at least 2.5 times the equivalent duct diameters of the blower outlet. AT THE BLOWER INLET: x Design for no bends in the duct for at least 5 equivalent duct diameters of the blower inlet. x If a transition is needed at the duct connection to the blower, included angle between the transition elements should not exceed 15°.
FIGURE E – PRESSURE DROP THROUGH PA-SERIES UNITS Due to continuing product development, specifications are subject to change without notice.
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SYSTEM DESIGN – STATIC PRESSURE DIFFERENTIAL
When the Average Static Pressure Difference between the two airstreams is greater than 1”, you may need to account for leakage airflow in your blower selection.
To Determine Average Static Pressure Difference 1. Lay out the design of the system specifying ducts, blowers and all other components that create static pressure differences. 2. Determine the static pressure conditions at the inlet and outlets of the energy-recovery unit, based on the operating points of the blower. 3. Calculate the Average Static Pressure Difference using the following formula: Average Static Pressure Difference
ª SPoa SPfa º ª SPra SPea º =« »¼ «¬ »¼ 2 2 ¬ Where:
To Evaluate Leakage Volume Determine leakage volume from chart (Fig. F). Leakage will be from the airstream at higher static pressure to the airstream at lower static pressure. Note that leakage volume is shown here as a function strictly of static pressure difference, not overall airflow volume. In Push-Push and Pull-Pull Blower Layouts leakage volume is almost always negligible. It should be considered in other blower layouts and may require adjustment of the designed blower operation points.
300 PA12X 250 Leakage Volume (CFM)
Strong static pressure differences can result in air leakage from one airstream to the other within the energy-recovery assembly.
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PA9X 200 PA8X 150 PA6X
100
50
0 0
SPoa is the Static Pressure at the Outside Air inlet to the Cabinet;
1
2
3
Average Static Pressure Difference
FIGURE F – LEAKAGE VOLUMES
SPfa is the Static Pressure at the Fresh Air outlet from the Cabinet; SPra is the Static Pressure at the Return Air inlet to the Cabinet; SPea is the Static Pressure at the Exhaust Air outlet from the Cabinet.
Comparison of Leakage Volume and EATR Ratings Leakage volumes presented here are application ratings for the complete PA energy-recovery unit. EATR is a certified rating point used in ARI’s 1060 program for the energy-recovery component in the PA unit. The two are related but not identical. EATR, or Exhaust Air Transfer Ratio, is leakage through the component only, expressed as a ratio of fresh air volume. The driving force for leakage in the PA energyrecovery unit is pressure differential between the two airstreams, which is not directly a function of airflow volume. Leakage occurs at a low rate in the component itself, as verified by our ARI ratings, and also at about the same volume in the case. Thus the leakage volumes presented here are both easier to apply and more accurate when considering the entire system.
Due to continuing product development, specifications are subject to change without notice.
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AIRSTREAM AND FILTER ARRANGEMENTS
CAUTION Read and understand this section before beginning assembly! This energy-recovery unit can be assembled in many different configurations. Only one of them is correct for your job! Check your ductwork design, then determine which Assembly Arrangement to use. 1st: Determine the AIRFLOW PATHS for your job. The two airstreams are the SUPPLY (air from outside) and the RETURN (air from the conditioned space). If Supply and Return enter the exchanger on OPPOSITE sides, use Arrangements 1 or 3 (Fig. 1). If Supply and Return enter the exchanger on the SAME side, use Arrangements 2 or 4 (Fig. 2). If the airstreams enter the exchanger low, and leave the exchanger high (or the other way around), this is called “cross airflow”. Use Arrangements 1 or 2. If one airstream enters the exchanger high and leaves high, and the other enters low and leaves low, this is called “parallel airflow”. Use Arrangements 3 or 4. This airflow configuration requires a performance derate. 2nd: Determine the resulting FILTER CONFIGURATION for your job. Note how many “twinned filters” you will need to assemble for your job.
FIGURE 1 – ARRANGEMENTS 1 & 3 (OPPOSITE-SIDE ENTRIES)
Remember that the filters must be installed to cover the inlet faces of the core stacks.
Due to continuing product development, specifications are subject to change without notice.
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AIRSTREAM AND FILTER ARRANGEMENTS (continued)
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CAUTION Derate performance if using Parallel Airflow (Arrangements 3 & 4). Reduce sensible effectiveness by 2 percentage points. Reduce total effectiveness by 1 percentage point.
FIGURE 2 – ARRANGEMENTS 2 & 4 (SAME-SIDE ENTRIES)
Due to continuing product development, specifications are subject to change without notice.
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PARTS LIST
PART LIST FOR PA-6X
QUANTITY 2 6 1 1 8 2 4 2 2 2 2 2 2 2 1 90 30 40 6 1 2 4 1 1
PART NUMBER 100030 100040 101003 101006 140771 101015 140775 101031 101033 101034 101038 101060 101072 101074 134722 135152 135155 135336 136078 140773 140598 135827 142070
DESCRIPTION Door S-Slip 59” Filter Removal Hook Top Cross Bar Side Duct Flange Filter Rack Flange End Panel Top Duct Flange U-Duct Flange L-Duct Flange End Cross Bar Filter Spacer Left Hand Filter Rack Right Hand Filter Rack Silicone Caulk 8-18x ½” screw #8 x ½” screw #12x ¾” screw Energy Recovery Core Literature Bag Full Width Side Panel Half Width Side Panel Core Center Spacer Base
PART LIST FOR PA-8X
QUANTITY 2 6 1 1 8 2 4 2 2 2 2 2 2 2 1 90 40 50 8 1 2 4 1 1
PART NUMBER 100030 135822 101030 101006 140778 101041 140777 101031 138067 101034 101038 101044 101076 101078 134722 135152 135155 135336 136078 140770 140768 135828 142070
DESCRIPTION Door S-Slip 79” Filter Removal Hook Top Cross Bar Side Duct Flange Filter Rack Flange End Panel Top Duct Flange U-Duct Flange L- Duct Flange End Cross Bar Filter Spacer Left Hand Filter Rack Right Hand Filter Rack Silicone Caulk 8-18x ½” screw #8 x ½” screw #12x ¾” screw Energy Recovery Core Literature Bag Full Width Side Panel Half Width Side Panel Core Center Spacer Base
TOOLS NEEDED FOR ASSEMBLY: Cordless Driver/Drill with these bits: Nut Driver ¼” Nut Driver 5/16” #2 Phillips Driver 1/8” Drill Bit Tape Measure 1/8” Allen Wrench Caulk Gun Rubber Mallet
Due to continuing product development, specifications are subject to change without notice.
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PARTS LIST (continued)
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PART LIST FOR PA-9X
QUANTITY 3 8 1 2 8 4 2 2 2 2 2 2 2 1 120 40 60 9 1 4 4 2 1 2
PART NUMBER 100030 100040 101003 101006 140771 140775 101004 101007 101047 101038 101060 101072 101074 134722 135152 135155 135336 136078 140773 140598 135827 142073 101062
DESCRIPTION Door S-Slip 59” Filter Removal Hook Top Cross Bar Side Duct Flange End Panel Top Duct Flange U-Duct Flange L- Duct Flange End Cross Bar Filter Spacer Left Hand Filter Rack Right Hand Filter Rack Silicone Caulk 8-18 x ½” screw #8 x ½” screw #12x ¾” screw Energy Recovery Core Literature Bag Full Width Side Panel Half Width Side Panel Core Center Spacer Base Filter Rack End
PART LIST FOR PA-12X
QUANTITY 3 8 1 2 8 4 2 2 2 2 2 2 1 120 50 70 12 1 4 4 2 1 2 2
PART NUMBER 100030 135822 101030 101006 140778 140777 101004 101047 101038 101044 101076 101078 134722 135152 135155 135336 136078 140770 140768 135828 142073 101048 101046
DESCRIPTION Door S-Slip 79” Filter Removal Hook Top Cross Bar Side Duct Flange End Panel Top Duct Flange L-Duct Flange End Cross Bar Filter Spacer Left Hand Filter Rack Right Hand Filter Rack Silicone Caulk 8-18x ½” screw #8 x ½” screw #12x ¾” screw Energy Recovery Core Literature Bag Full Width Side Panel Half Width Side Panel Core Center Spacer Base Filter Rack End U-Duct Flange
FASTENERS PROVIDED WITH UNIT (SHOWN ACTUAL SIZE) Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Stack Energy Recovery Cores Position BASE in appropriate location on a flat, level surface. Place 1st RenewAire ENERGY RECOVERY CORE on BASE. (Fig 3) NOTE: Orient each Energy Recovery Core with the foam gasket facing DOWN. Check location of the Core (Figs. 4 & 6).
FIGURE 3 – PLACE FIRST ENERGY RECOVERY CORE.
FIGURE 6 – TWO-STACK UNIT SHOWN ABOVE. Dimensions apply to all models.
Install CORE CENTER SPACER to 1st RenewAire ENERGY RECOVERY CORE (Fig. 5). FIGURE 4 – CHECK CORE PLACEMENT.
FIGURE 5 – PLACE CENTER SPACER.
Core Center Spacers come with (2) S-slips installed. Insert flange of RenewAire ENERGY RECOVERY CORE into S-slip on Core Center Spacer (Fig. 7).
FIGURE 7 – DETAIL OF CORE CENTER SPACER BETWEEN TWO CORE STACKS.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Stack Energy Recovery Cores (continued)
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Place 2nd ENERGY RECOVERY CORE on BASE. (Fig. 8) Slide one flange of core into Core Center Spacer. Check locations of the second stack (Figs. 9 & 10).
FIGURE 8 – PLACE SECOND ENERGY RECOVERY CORE.
FIGURE 9 – ENERGY RECOVERY CORE LOCATIONS FOR TWO-STACK UNIT.
FIGURE 10 – CHECK SECOND CORE PLACEMENT.
THREE-STACK UNITS ONLY: Place 2nd Core Center Spacer. Place 3rd Core. Check locations of the stacks (Fig. 11).
FIGURE 11 – ENERGY-RECOVERY CORE LOCATIONS FOR THREE-STACK UNIT.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Stack Energy Recovery Cores (continued) COMPLETE THE CORE STACKS (Figs. 12 & 13). Double-check stack placement (shown in Fig. 14).
FIGURE 12 – CONTINUE FIRST CORE STACK.
FIGURE 13 – CONTINUE SECOND CORE STACK.
FIGURE 14 – SECOND CORE STACK COMPLETED. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install End Panels
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Place S-Slips on the RenewAire Core Flanges at both ends of the Array, so the END PANELS can be installed (Fig 15).
FIGURE 15 – PLACE S-SLIPS ON END FLANGES.
Install END PANELS. Bottom edges of END PANELS go inside the BASE. Insert long edges OF END PANELS into the S-SLIP on each CORE STACK. Pull END PANELS out at the bottom, tight to the BASE. Fasten END PANELS by screwing through BASE (Fig. 17). Use (6) #12 screws at each end. Drill 1/8” pilot holes.
FIGURE 16—INSTALL END PANELS.
FIGURE 17 –FASTEN END PANELS TO ENDS OF BASE ASSEMBLY.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Square up and connect cores, center spacer and ends Place S-SLIPS on all the remaining CORE FLANGES (Fig. 18). Check that CORE STACKS are plumb and level (Fig. 19). Connect the END PANELS to the CORE STACKS: Drill 1/8” pilot holes through SSLIPS on END PANELS, then drive #12 selfdrilling screws. Fasten CORE STACKS to CORE CENTER SPACERS. Drill 1/8” pilot holes through S-SLIPS on CENTER SPACER(S), then drive #12 screws: (12) screws per Spacer for three-stack units; (16) screws per Spacer for four-stack units.
FIGURE 18 – INSTALL S-SLIPS ON REMAINING CORE STACK FLANGES.
CAUTION DRIVE SCREWS ONLY INTO THE S-SLIPS CONNECTING THE CORES TO THE END PANELS AND CENTER SPACERS!
Caulk gaps where corners of the CORES meet at the S-SLIPS to prevent air leakage between compartments.
FIGURE 19 – CORE STACKS AND END PANELS MUST BE PLUMB AND LEVEL. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Assemble Twinned Filter Racks(s)
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NOTE: See “Airstream and Filter Arrangements”, page 8-9, to determine the proper number and location of Twinned Filter Racks for your job. For each TWINNED FILTER RACK you will need: (1) RIGHT-HAND FILTER RACK, (1) CENTER SPREADER BAR, and (1) LEFT-HAND FILTER RACK. Remove FILTERS from FILTER RACKS. Connect the TWINNED FILTER RACK parts together. Make sure the flanges point forward. (Fig. 21).
FIGURE 20 – PARTS OF TWINNED FILTER RACK.
Screw the FILTER RACKS to the CENTER SPREADER BAR. (Fig. 23). Use #8 self-drilling pan head screws for each of the two FILTER RACKS. Replace FILTERS. FILTERS are marked for airflow direction: remember, the filters are on the inlet sides of the ENERGY RECOVERY CORES.
FIGURE 21 – PARTS OF TWIN FILTER RACKS, VIEWED FROM ABOVE.
FIGURE 22 – DETAIL OF TWIN FILTER RACK.
FIGURE 23 – ASSEMBLE TWIN FILTER RACKS.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Filter Racks
CAUTION It is extremely important that the panels and filter racks are placed correctly for the airflow configuration used in this job. See Drawing on pages 8 & 9 for layout of panels as viewed from each side of the Array. Install TWINNED FILTER RACK(S) (Fig 24) Set FILTER RACK on BASE between CORE STACKS. Make sure racks are right side up (so filters can be pulled up and out of the racks).
FIGURE 24 – PLACE TWINNED FILTER RACKS AGAINST ENERGY RECOVERY CORES (TWOSTACK UNITS).
Pull the FILTER RACK towards the edges of the BASE. The flanges on the FILTER RACKS should be up very close to the S-slips on the CORE STACKS (Fig. 27, next page). PA6X AND PA8X – ARRANGEMENT 2 & 4 ONLY: Attach Flanges to each of the remaining Single Filter Racks before installing them. Place the SINGLE FILTER RACKS (if any) against the CORE STACKS. The back flange of the FILTER RACK should tuck tight into the inner corner of the END PANEL.
FIGURE 25 – IT CAN BE HELPFUL TO TEMPORARILY CLAMP ADJACENT FILTER RACKS TOGETHER AT THE TOP.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Filter Racks (continued)
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FIGURE 26 – PLACE SINGLE FILTER RACKS AGAINST APPROPRIATE CORE STACK FACES.
Align the flanges of the FILTER RACKS with the S-SLIPS on the CORE STACKS (Fig. 27).
FIGURE 27 – ALIGNMENT OF FILTER RACK FLANGES AND CORE STACKS.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: INSTALL SIDE PANELS
CAUTION It is extremely important that the panels and filter racks are placed correctly for the airflow configuration used in this job. See Drawing on pages 8 & 9 for layout of panels as viewed from each side of the Array.
FIGURE 28 – PLACE FIRST SIDE PANEL.
Slide Flanges of SIDE PANELS into SSLIPS on ENERGY RECOVERY CORES (Fig. 28). Align Flanges of FILTER RACKS with edges of SIDE PANELS.
Flange on Filter Rack tucks into corner of Full-Width Pan.
Flanges on FILTER RACKS tuck into the inside corner of the SIDE PANELS that covers the compartment in which the FILTER RACK is installed (Fig. 29).
FIGURE 29 – FILTER RACK AND SIDE PANEL.
CAUTION Do not install any screws at this time!
FIGURE 30 – PLACE SECOND SIDE PANEL.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Side Panels (continued)
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CAUTION Don’t drive side panels all the way home yet – you will adjust them to final size in the next step.
FIGURE 31 – INSTALLING FINAL SIDE PANEL (TWO-STACK UNIT SHOWN).
Complete placing all the SIDE PANELS (Fig. 32).
FIGURE 32 – ALL SIDE PANELS INSTALLED (TWOSTACK UNIT SHOWN).
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Top Duct Flange
Install LONG TOP BARS (FIG. 33). Attach each TOP DUCT FLANGE to SIDE PANELS with #8 self-drilling screws. The TOP DUCT FLANGE should end just flush with each END PANEL.
FIGURE 33 – INSTALL TOP DUCT FLANGE.
The TOP DUCT FLANGES have notches that fit around the S-SLIPS and CORE FLANGES (Fig. 34). The inside leg of the TOP DUCT FLANGE should fit between the FILTER RACKS and the SIDE PANELS (Fig. 34).
FIGURE 34 – INTERSECTION OF CORE STACKS, FILTER RACKS AND TOP DUCT FLANGE.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install End Cross Bars
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Install END CROSS BARS (Figs. 35 – 37). Attach each END CROSS BARS to END PANELS with (4) #8 self-drilling screws (Fig. 37).
FIGURE 35 – SLIDE END CROSS BAR ONTO END PANELS.
FIGURE 36 – END CROSS BAR IN POSITION.
FIGURE 37 – SCREW END CROSS BAR ONTO END PANELS. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Duct Flanges Install (2) L-DUCT FLANGES, one on each side of the unit (Fig. 38).
`
L-DUCT FLANGE slips between the SIDE PANELS and the BASE.
CAUTION Don’t install screws yet!
FIGURE 38 – INSTALL L-DUCT CHANNELS.
Install (8) SIDE DUCT FLANGES next, (4) on each side. (Fig. 39) Slide SIDE DUCT FLANGES into slot in END PANELS.
CAUTION Don’t install screws yet!
FIGURE 39 – INSTALL SIDE DUCT FLANGES.
Put U-DUCT FLANGE in position (Fig. 40). It should fit snugly between the SIDE DUCT FLANGES.
FIGURE 40 – INSTALL U-DUCT FLANGE. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Duct Flanges (continued)
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Attach U-DUCT FLANGE to SIDE PANELS. (Fig. 41) Use #8 screws. Drill 1/8” pilot holes.
FIGURE 41 – ATTACH U-DUCT FLANGE.
Attach all the SIDE DUCT FLANGES to the END PANELS (FIG. 42). Use (4) #8 screws for each DUCT FLANGE.
Attach each L-DUCT FLANGE. Use #12 screws. Drill 1/8” pilot holes. FIGURE 42 – ATTACH SIDE DUCT FLANGES.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Top Cross Bar(s) Install TOP CROSS BARS. First, check spacing between the two LONG TOP BARS (Fig. 43). Attach each Top Cross Bar with (6) #8 self-drilling pan-head screws. (Fig 45).
FIGURE 43 – CHECK LONG TOP BAR SPACING.
FIGURE 44 – CENTER TOP CROSS BAR BETWEEN CORE STACKS.
FIGURE 45 – INSTALL TOP CROSS BAR. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Screw Side Panels to Core Stacks & Filter Racks
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Check that SIDE PANELS form a flat plane (Fig. 46). Adjust panels In and out with a rubber mallet as needed. Fasten all the PANELS to the CORE STACKS by screwing through the SSLIPS (Figs. 47 - 49). Install Screws through FILTER RACK FLANGES or S-SLIPS on CORE STACKS to connect all pieces together. FIGURE 46 – CHECK FLATNESS OF SIDE PANELS.
FIGURE 47 – DRIVE SCREWS INTO EDGES OF SIDE PANELS.
Use #12 self-drilling screws. Drill 1/8” pilot holes.
FIGURE 49 – LOCATIONS FOR SCREWS.
Caulk all accessible joints to prevent air leakage between compartments.
FIGURE 48 – DRIVE SCREWS INTO EDGE OF SIDE PANELS. Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Install Doors Install DOORS (Figs. 50 - 52). Each DOOR weighs 35 pounds. Orient the DOORS so their Latches grip the CROSS BARS. Handles are closer to the END PANELS and the CROSS BARS than to the inlet/outlet faces (Fig. 51).
FIGURE 50 – PLACE DOORS ON TOP.
Check for good compression of the DOOR gaskets. If necessary, adjust the inner latch to provide proper compression. Use a 1/8” allen wrench to loosen and re-tighten the set screw (Fig. 53).
FIGURE 51 – CORRECT ORIENTATION OF LATCHES.
FIGURE 52 – SECURE LATCHES.
FIGURE 53 – LATCH DETAIL.
Due to continuing product development, specifications are subject to change without notice.
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ASSEMBLY: Final Caulking and Check-out
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Apply Final Caulking (Fig. 54). Purpose of caulking at this stage is to prevent leakage of air from ducts.
FIGURE 54 – LOCATION FOR FINAL CAULKING.
Assembly is complete! (Fig. 55).
Check the following: Panels and filter racks are placed correctly for the air flow paths required for the job. No air gaps between compartments. NOTE: Duct flange sizes are shown in unit dimensional drawing page 3.
PROCEED WITH INSTALLATION OF PLENUMS, DUCTS, AND BLOWERS.
FIGURE 55 – COMPLETED UNIT (TWO-STACK, THREE-HIGH UNIT SHOWN).
Danger of carbon monoxide poisoning! Outside air intake should be 10’ (minimum) away from sources of carbon monoxide or other toxic gasses such as chimneys, furnace and water heater exhausts. Do not locate outside air intake where vehicles may be serviced or left idling.
CAUTION Danger of damage due to condensation. Both ducts connecting the unit to the outside must be insulated with sealed vapor barriers inside and out to prevent condensation and/or freezing inside the insulation or on the duct surface.
Due to continuing product development, specifications are subject to change without notice.
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FORKLIFT INFORMATION
The assembled PA unit can be moved with a forklift for final positioning.
CAUTION Avoid damage to unit! Observe the following: 1. Unit weights are shown in Dimension drawings on Page 3. 2. See drawing for maximum fork size and correct fork spacing. 3. See chart for minimum fork lengths. 4. Keep forks level while entering the unit base. 5. When lifting unit from sides, be careful not to crush the duct flanges.
Danger of injury to people when moving the unit! Observe the following: 1. Only properly trained, certified and competent forklift operators may move the unit. 2. Units are large and will block forward vision. An assistant must be present to direct the operator. 3. Keep forks level while entering the unit base. 4. Keep unit level while moving.
MINIMUM FORK LENGTHS UNIT PA6X PA8X PA9X PA12X
SIDE LIFT
END LIFT 40”
40” 66”
Due to continuing product development, specifications are subject to change without notice.
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OPERATION
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Basic Function of PA-Series Energy Recovery Unit The PA-Series energy-recovery unit transfers heating or cooling energy from an exhaust air stream to a fresh air stream. The energy-recovery cores operate with no moving parts. The energy-recovery cores will transfer energy between the two air streams as long as air flow is maintained. NOTE: System blowers are not provided with the PA-Series and are provided by others. Filters are provided with the unit so that the faces of the energy-recovery cores need not be cleaned more often than annually. Filters must be maintained (Page 32).
Checking Operation of the PA-Series Air Flow Energy recovery will not occur unless airflow is occurring in both air streams. One place to confirm that air is moving is at the weatherhoods where air is exhausted and brought in. If close control of the airflow volume is critical, it may be desirable to permanently install flow measuring stations in the ductwork connected to the unit. These also can be used to determine when filters should be cleaned or changed. Energy Exchange When there is a significant temperature difference between the inside and outside air it should be possible to measure a change in temperature (in either airstream) before it enters and after it leaves the unit. The temperature increase or decrease in each airstream is a function of: 1) the number of cores in the system; 2) the flow rates of the two airstreams: 3) temperature difference between the two airstreams.
Note that precise determination of energy exchange effectiveness in the field is quite difficult. Accurate determination of the supply and return mass airflow volumes is required. Also, temperatures must be very carefully measured. The leaving airstreams display significant temperature distribution, so temperatures of the leaving airstreams must be measured in several locations and averaged to obtain credible results. The accuracy of temperature exchange effectiveness calculations can be improved by calculating effectiveness separately for each airstream, then averaging the results. Accuracy is also better (uncertainty is lower) when the temperature difference between the entering airstreams is at least 20°F. Nonetheless, it is generally impossible to measure effectiveness in the field with an uncertainty less than 10%. Operating Controls The operating controls are not supplied with the PASeries. A wide variety of control schemes may be selected by the engineer, installer, or owner to meet the ventilation needs of the facility. Continuous Operation Continuous operation is acceptable in virtually all conditions. With continuous operation in very cold weather, some frost may accumulate on the outside of the case. If the system is cycled off periodically, this frost will re-evaporate. Frost on the outside of the case does not necessarily indicate any frost inside the Energy Recovery Core. Operation in Extreme Cold Weather Unit is capable of operating at outside temperatures down to -10°F, with indoor humidities below 40%. Unit can operate at more severe conditions occasionally with brief or no impact on its performance. At lower humidities, it can operate at lower outside temperatures without freezing the energy-exchange core.
See the product specification sheets to determine the expected energy exchange effectiveness under specific conditions.
Due to continuing product development, specifications are subject to change without notice.
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MAINTENANCE
CAUTION
DANGER OF EYE INJURY FROM MOVING AIR WHEN SERVICING ENERGY EXCHANGER! ALWAYS DISCONNECT POWER SOURCE BEFORE SERVICING, TO ENSURE NO AIR FLOW IN THE SYSTEM.
Maintenance procedures must be followed. System will not perform as designed unless filters are changed and the energy recovery cores are cleaned as described on this page.
Change Filters
Clean Energy Recovery Cores
Every two or three months when the unit is in regular use, or as needed to maintain flow.
Every 5000 operating hours. TO CLEAN THE ENERGY EXCHANGE CORES:
TO ACCESS THE FILTERS: 1. Remove the Doors from the top of the PA-Series. 2. Reach down into the Filter Racks to remove the top two filters. (A FILTER REMOVAL HOOK is provided for removal of the bottom two filters in each rack.) 3. Replace the filters. Check filters for correct airflow direction (filters are upstream) of Cores.
1. Remove the unit access panels and filters; 2. Vacuum the exposed faces of the energy exchange core with a soft brush; 3. Vacuum out dust from the rest of the unit case; 4. Install new filters.
CAUTION Do not attempt to wash the energy exchange cores. NOTE: Dust does not collect inside the energy exchange cores. It is not necessary to attempt to clean the inside of the cores.
Filter Specifications: 20”x20”x2” (nominal) pleated filters Actual size: 19.5” x 19.5” x 1.75” Unit shipped with MERV-8 Filters (recommended). Do not replace with filters rated less than MERV-6. Initial Resistance of Filters supplied with this unit: INITIAL PRESSURE DROP: 20" x 20" MERV 8 FILTERS RENEWAIRE SERVICE PART NUMBER 990083
PRESSURE DROP THROUGH FILTER ("H2O)
0.2
0.1
0 400
500
600
700
800
900
1000
CFM/FILTER
Due to continuing product development, specifications are subject to change without notice.
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