Transcript
Service Facts
Split System Air Conditioners Odyssey™ ™ Heat Pump — 7.5 Tons — 60 Hz Single Compressor TWA090D30RA* TWA090D30TA* TWA090D30UA* TWA090D30WA* TWA090D40RA* TWA090D40TA* TWA090D40UA* TWA090D40WA* TWA090DK0RA* TWA090DK0TA* TWA090DK0UA* TWA090DK0WA* TWA090DW0RA* TWA090DW0TA* TWA090DW0UA* TWA090DW0WA*
TWA090D3HRA* TWA090D3HTA* TWA090D3HUA* TWA090D3HWA* TWA090D4HRA* TWA090D4HTA* TWA090D4HUA* TWA090D4HWA* TWA090DKHRA* TWA090DKHTA* TWA090DKHUA* TWA090DKHWA* TWA090DWHRA* TWA090DWHTA* TWA090DWHUA* TWA090DWHWA*
S A F E T Y WA R N I N G Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
August 2015
SSP-SVF03B-EN
Introduction Read this manual thoroughly before operating or servicing this unit.
Warnings, Cautions, and Notices Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions. The three types of advisories are defined as follows:
WARNING
CAUTION
NOTICE
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices. Indicates a situation that could result in equipment or property-damage only accidents.
Important Environmental Concerns Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs.
WA R N I N G Prope r Fi el d Wi ring a nd Groundi ng Required! Fa il u re to f ol lo w c ode c o ul d r es u lt i n de at h or s e r i o u s i n j u r y. All field w ir in g MUST be p er for med b y qualif ied per sonnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION h a z a r d s . To a v o i d t h e s e h a z a r d s , y o u M U S T f o l l o w requirements for field wiring installation and grounding as described in NEC and your local/ state electrical codes.
WA R N I N G Pe r s o n a l P r o t e c t i v e E q u i p m e n t ( P P E ) Required! Fa il u re to w ea r pro pe r PPE f or t he j ob b ei ng u n d e rt a k e n c o u l d r e s u l t i n d e a t h o r s e r i o u s i n j u r y. Te ch n i c i a n s , i n o r d e r t o p r o t e c t t h e m s e l v e s f r o m p o t e n t i a l e l e c t r i c a l , m e ch a n i c a l , a n d ch e m i c a l h azards, MUST follow pr ecaut io ns in th is man ual a n d o n t h e t a g s , s t i ck e r s , a n d l a b e l s , a s w e l l a s t h e instructions below: •
Before installing/servicing this unit, t e ch n i c i a n s M U ST p u t o n a l l P P E r e q u i r e d f o r t h e w o r k b e i n g u n d e rt a k e n ( E x a m p l e s ; c u t r e s i s t a n t g l ov e s / s l e e v e s , b u t y l g l ov e s , s a f e t y glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). A LWAY S r e f e r t o a p p r o p r i a t e M a t e r i a l Sa f e t y Dat a Sheets ( MSDS)/Saf et y Data Sh eets (SDS) and OSHA guidelines for proper PPE.
•
When working with or around hazardous ch e m i c a l s , A LWAY S r e f e r t o t h e a p p r o p r i a t e MSDS/SDS and OSHA/GHS (Global H a r m o n i ze d Sy s t e m o f C l a s s i f i c a t i o n a n d Labelling of Chemicals) guidelines for in for mat io n on a ll owa bl e pe r s ona l e x pos ur e levels, proper respiratory protection and handling instructions.
•
If there is a risk of energized electrical c o n t a c t , a r c , o r f l a s h , t e ch n i c i a n s M U S T p u t o n a l l P P E i n a c c o r d a n c e w i t h O S H A , N F PA 7 0 E , o r o t h e r c o u n t r y- s p e c i f i c r e q u i r e m e n t s for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, D I S C O N N E C T I N G , O R VO LTA G E T E ST I N G WITHOUT PROPER ELECTRICAL PPE AND A R C F L A S H C LO T H I N G . E N S U R E E L E C T R I C A L M E T E R S A N D E Q U I P M E NT A R E P R O P E R LY R AT E D F O R I NT E N D E D VO LTA G E .
Important Responsible Refrigerant Practices Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified. The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.
©2015 Trane
All rights reserved
SSP-SVF03B-EN
Introduction
Copyright
Trademarks
This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.
All trademarks referenced in this document are the trademarks of their respective owners.
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Refrigerant Circuit Figure 1. Typical split system heat pump - cooling - refrigerant circuit HEAT PUMP CIRCUIT DIAGRAM COOLING MODE Note A EQUALIZER LINE
FIELD SUPPLIED INTER-CONNECTING TUBING 4-WAY SWITCHOVER VALVE
Note A
V
OUTDOOR COIL
AIR
EQUALIZER TUBE
EXPANSION VALVE BULB
SERVICE VALVE
EXPANSION VALVE BULB
TXV
FILTER DRIER
HIGH PRESSURE SWITCH (HPCO)
TXV
D
CHECK VALVES
INDOOR COIL
AIR
GAUGE CONNECTION
S COMPRESSOR
Note A DISCHARGE TEMPERATURE LIMIT(DTL)
LOW PRESSURE SWITCH (LPCO)
Note A V SERVICE VALVE
INDICATES DIRECTION OF REFRIGERANT FLOW
NOTE A: ONLY ONE OUTDOOR AND INDOOR COIL REFRIGERANT ENTRY AND EXIT CIRCUIT IS SHOWN. ALL MODELS HAVE MULTIPLE ENTRY AND EXIT CIRCUITS. NOTE B: DUAL CIRCUIT MODELS HAVE 2 REFRIGERATION CIRCUITS.
Figure 2. Typical split system heat pump - heating - refrigerant circuit HEAT PUMP CIRCUIT DIAGRAM HEATING MODE FIELD SUPPLIED INTER-CONNECTING TUBING EQUALIZER LINE
NOTE A EQUALIZER LINE
NOTE A
SERVICE VALVE
4-WAY SWITCHOVER VALVE
V
EXPANSION VALVE BULB
OUTDOOR COIL
TXV HIGH PRESSURE SWITCH (HPCO)
TXV
AIR
INDOOR COIL AIR HANDLER
FILTER DRIER LOW PRESSURE SWITCH (LPCO)
AIR
D
S COMPRESSOR CHECK VALVES NOTE A
NOTE A
GAUGE CONNECTIONS DISCHARGE TEMPERATURE LIMIT (DTL) SERVICE VALVE
DE-ICE LOOP
V
INDICATES DIRECTION OF REFRIGERANT FLOW
NOTE A: ONLY ONE OUTDOOR AND INDOOR COIL REFRIGERANT ENTRY AND EXIT CIRCUIT IS SHOWN. ALL MODELS HAVE MULTIPLE ENTRY AND EXIT CIRCUITS. NOTE B: DUAL CIRCUIT MODELS HAVE 2 REFRIGERATION CIRCUITS.
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Product Specifications Table 1.
General data 7.5 Tons Single Comp TWA090D
Cooling Performance - Gross Cooling Capacity Matched Air Handler
93,000
Condensing Unit Only
86,000
ARI Net Cooling Capacity
90,000
Efficiency Matched Air Handler (EER) / Cond Unit Only (EER) System (IEER) System kW/Condensing Unit kW
11 / 12.2 11.7 8.18/7.05
Heating Performance - ARI Htg/Matched AH High Temperature Capacity System kW / COP Low Temperature Capacity System kW / COP
82,000 7.28 / 3.3 49,000 6.24 / 2.3
Compressor Type
Scroll
No./Tons
1/6.9
System Data(a) No. Refrigerant Circuits Suction Line (in.) OD Liquid Line (in.) OD
1 1 1/8 5/8
Outdoor Coil Type / Tube Size (in.) OD
Lanced / 0.375
Face Area (sq ft)
19.24
Rows/FPI (Fins per inch)
2/18
Outdoor Fan Type No. Used/Diameter (in.) Drive Type/No. Speeds CFM
Propeller 1/26 Direct/1 6,530
No. Motor/HP
1/0.5
Motor RPM
1,100
Refrigerant Charge (Field Supplied) lbs of R-410A
20.6
Shipping Dimensions HxWxD (in.)
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46.1” x 45” x 38”
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Pr o d u c t S p e c i f i ca t i o n s
N OT I C E Re f r i g e r a n t i n C r a n k c a s e ! Fai l ure t o fol l ow i ns tr uc ti on s c oul d re s ul t in equipment damage. Do not disconnect power except for safety or s e r v i c e . F o l l o w t h e s e p r o c e d u r e s p r i o r t o s t a rt u p i f u n i t h a s b e e n ch a r g e d o r p o w e r h a s b e e n di sc o nne c te d for m o re th an 12 hou r s . If s y st em h a s j u s t b e e n ch a r g e d t h r o u g h l i q u i d l i n e s e r v i c e v a l v e p o rt , a n 8 h o u r c o m p r e s s o r o i l w a r m i n g t i m e is not required. S e t r o o m t h e r m o s t a t t o “O F F ” p o s i t i o n a n d e n s u r e compressor is not running. Apply power for at l e a s t 8 h o u r s p r i o r t o s t a rt u p b y c l o s i n g d i s c o n n e c t s w i t ch . T h i s w i l l e n e r g i z e c o m p r e s s o r o i l h e a t e r w h i ch w i l l e v a p o r a t e a n y l i q u i d r e f r i g e r a n t i n c r a n k c a s e . A ft e r 8 h o u r s t h e t h e r m o s t a t m a y b e s e t to cooling. Table 2. Refrigerant/tubing Tubing Sizes Suction
Liquid
Additional Tubing Length
Additional Refrigerant
Horizontal(a) 1 3/8”
1/2”
15’
1 lb, 8 oz
1 3/8”
1/2”
25’
2 lbs, 9 oz
1 3/8”
1/2”
40’
4 lbs, 2 oz
Note: Amounts shown are based on 1.65 ounces of refrigerant per foot of 1 3/8" and 1/2" lines. (a)
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Amount of refrigerant charge shown is for condenser and matching size evaporator/air handler with 25 feet of interconnecting tubing. Use refrigerant/ tubing table for amounts of charge for additional tubing lengths, or for reducing charge for lengths less than 25 feet.
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Charging Levels Table 3. Estimated charge levels at ARI rated line lengths (25 feet) Refrigerant Charge
Per Circuit
Matched Set
Circuit 1
Circuit 2
Liquid Line Diameter
Vapor Line Diameter
TWA090D w/TWE090D
20.6
NA
0.625 (5/8”)
1.375 (1 3/8”)
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Start-Up ReliaTel™ ™ Controls The ReliaTel™ Control is a microelectronic control feature, which provides operating functions that are significantly different than conventional Electromechanical units. The ReliaTel™ Refrigeration Module (RTRM) uses proportional/integral control algorithms to perform specific unit functions that govern the unit operation in response to application conditions. The RTRM provides compressor anti-short cycle (ASC) timing functions through minimum“ “O ff” and “O n ” timing to increase reliability, performance and to maximize unit efficiency. Upon power initialization, the RTRM performs self-diagnostic checks to insure that all internal controls are functioning. It also checks the configuration parameters against the components connected to the system. The system LED located on the RTRM module is turned “O n ” within one second after power-up if all internal operations are correct. The heating and cooling cycles of the heat pump are automatic for Heat and Cool functions when using an optional automatic changeover thermostat (TS). The fan switch on the optional automatic changeover thermostat can be placed in either the O N position, causing continuous evaporator (indoor) fan operation, or the A U TO position causing fan operation to coincide with heating or cooling run cycles. (In A U TO position, the fan switch automatically changes to Heat or Cool in response to sufficient room temperature change.)
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Anti-Short Cycle Timer
CC
Compressor Contactor
CCH
Crankcase Heater
CF
Outdoor Fan Capacitor
CHR
Crankcase Heater Relay
CPR
Compressor
CTS
Coil Temperature Sensor
DTL
Discharge Temperature Limit Switch
EDC
Evaporator Defrost Control Switch
FTB
Outdoor Fan Terminal Block
HPC
High Pressure Cutout Switch
HTB
High Voltage Terminal Block
LPC
Low Pressure Cutout Switch
LTB
Low Voltage Terminal Board
OAS
Outdoor Air Temperature Sensor
ODF
Outdoor Fan Relay
ODM
Outdoor Fan Motor
PM
Phase Monitor
RTRM
ReliaTel ™ Refrigeration Module
SOV
Switchover Valve
TNS
Transformer
These subsections describe the following key heat pump functions and features: •
ASC
Communication Interface Module
Functions and Features
Terminology The following terms and acronyms may be used in this section.
COMM
• • • • •
Processing Activated When the Disconnect Switch is in O N Position Mechanical Heat Auxiliary Heat Emergency Heat Cooling Demand Defrost
Processing Activated When the Disconnect Switch is in the ON Position The following table lists the processing that occurs given the stated condition.
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Condition
If the disconnect switch is in the ON position…
Resulting Operations 1.
Current is supplied to the compressor crankcase heater(s) (CCH) through the normally closed contacts of the crankcase heater relay (CHR) when the compressor is not running.
2.
The phase monitor (PM) is powered.
3.
The phase monitor (PM) looks at the incoming power to verify that there is no reversed phase, no phase imbalance, and no loss of phase. If the phase monitor detects any of these three conditions, it will shut off control voltage.
4.
The control transformer (TNS) is powered.
5.
The ReliaTel ™ control board (RTRM) is powered and performs self-diagnostic checks to insure that all internal controls are functioning.
6.
The ReliaTel ™ control board (RTRM) checks the configuration parameters against the components connected to the system.
7.
The system LED located on the RTRM module is turned ON within one second after power-up if all internal operations are correct.
8.
The communications board (COMM) is powered if installed.
9.
The indoor thermostat (TS) is powered.
Mechanical Heat
Smart Recovery
In Heat mode the switchover valve (SOV) is turned O F F. When a request for heating occurs, the control system turns O N the mechanical heat (compressors) to perform heating. Dual circuit heat pumps are factory configured to have 2-step mechanical heating enabled (RTRM J4-3 tied to ground).
Smart Recovery dictates that if the Active Zone Temperature is making a recovery using only mechanical heating toward the setpoint at a rate of at least 6°F/hour (0.1°F/minute), the electric heat is disabled. If Smart Recovery is not disabling electric heat, an approximate 9 minute stage-up delay (plus or minus a few minutes) is provided for each stage to allow time for recovery to begin. Stages of electric heat are enabled and energized as necessary to meet heating demand. When the request for Auxiliary Heat is removed, the Indoor Fan request is turned O F F at the same time as the Electric Heat Stages. See Table 4, p. 10, Table 5, p. 11, Table 6, p. 11, and Table 7, p. 11 for the staging, sequence, and control.
The staging sequence depends on the type of mechanical heating that is enabled. •
If 1-Step mechanical heating is enabled (RTRM J4-3 not tied to ground), the unit will stage according to Table 6, p. 11, as a result of the proportional/integral control algorithms.
•
Units with 2-step mechanical heating will stage according to Table 7, p. 11, as a result of the proportional/integral control algorithms.
With mechanical heating, when a heat request is turned O N , the Indoor Fan request is turned O N . When the heat request is turned O F F, the Indoor Fan request is turned O F F after a specified delay (60 seconds on all dual-compressor units and 80 seconds on all single compressor units). See Table 4, p. 10, Table 5, p. 11, Table 6, p. 11, and Table 7, p. 11 in this document for the staging, sequence, and control.
Auxiliary Heat Auxiliary Heat is factory disabled on all Odyssey units (Jumper placed between J2-1 and J2-2 RTRM inputs). If configured (Jumper wire cut or removed between J2-1 and J2-2 on RTRM) and installed, Auxiliary Heat is enabled or disabled by Smart Recovery.
All split system units are also configured from the factory for only 1-Stage of Electric Heat (Jumper placed between J1-3 and J1-6 RTRM inputs). To enable two stages of Electric Heat, cut or remove the jumper between J1-3 and J1-6 RTRM inputs.
Emergency Heat When Emergency Heat mode is requested and Auxiliary Electric Heat is configured and installed, only the Auxiliary Electric Heat will be turned O N to satisfy the Heat request. Mechanical heat will be held O F F. When the request for Emergency Heat is initiated, the Indoor Fan request is turned O N 1 second before the electric heat stages are activated. See Table 4, p. 10, Table 5, p. 11, Table 6, p. 11, and Table 7, p. 11for the staging, sequence, and control.
Cooling With a request for Cooling, the RTRM stages the circuits and control normally for single and dual stage
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S t a rt - U p
Single and Dual Circuits
cooling applications. If the unit is configured with a zone sensor, switchover valve 1 (SOV1) and switchover valve 2 (SOV2) are energized for the duration of the Cooling mode and do not change states until the unit either enters O F F mode or transitions to Heat mode. If the unit is controlled with a thermostat, SOV1 and SOV2 are energized while the thermostat W1/O signal output to the RTRM is active.
When a circuit enters Defrost mode, the compressor will remain energized, the associated outdoor fan (ODF) will de-energize, the associated switchover valve (SOV) output will energize, and the first stage of Auxiliary Heat energizes. On dual circuit units, the opposite circuit's state will remain unchanged if a defrost cycle has not been initiated on that circuit. Each circuit will enter defrost independently based on its associated Outdoor Coil Temperature Sensor (CTS), the Outdoor Air Temperature Sensor (OAS), and its total accumulated run time.
The outdoor fans (ODF) will turn O N and O F F with the compressors. Circuit 1 fan cycles with compressor 1 and circuit 2 fan will cycle with compressor. If a compressor is turned O F F, the anti-short cycle timer (ASC) will hold the compressor O F F for 3 minutes. See Table 4, p. 10, Table 5, p. 11, Table 6, p. 11, and Table 7, p. 11 for the staging, sequence, and control.
Termination of the Defrost Cycle A circuit will leave defrost, during normal conditions, once the outdoor coil temperature reaches the outdoor air temperature + 47°F which must be above 57°F and not greater than 72°F. Termination of the defrost cycle includes a "Soft Start" delay of 5 seconds for the switchover valve (SOV) where the outdoor fans (ODF) are turned on 5 seconds before the switchover valve (SOV) is returned to the heating position to help smooth the transition.
Demand Defrost When power is first applied to the unit, the first demand-defrost cycle will be initiated based on a cumulative run time of exactly 30 minutes only at the required conditions. The cumulative run time at the required conditions is tracked separately for each compressor. Shortly after completion of the first defrost cycle, the system control calculates the temperature difference between the outdoor coil and outdoor air, using the result as an indicator of unit performance at dry coil conditions.
Behavior of Switchover Valves The switchover valves (SOV) will both be energized during cooling mode and will be de-energized during Heat or O F F mode. However, during a defrost cycle, only the circuit that requires a defrost cycle will energize its switchover valve (SOV). For thermostat control, if a thermostat is requesting for the switchover (SOV) to be energized or de-energized, both switchover valve (SOV) outputs will follow the thermostat request (unless a circuit is in a defrost cycle).
Conditions Triggering the Defrost Cycle Over time, as moisture and frost accumulate on the coil, the coil temperature will drop, increasing the temperature difference. When the temperature difference is large enough, a defrost cycle is initiated. Demand Defrost is initiated when the outdoor air temperature (OAS) is below 52°F and the outdoor coil temperature (CTS) is below 33°F.
Defrost Configuration Facts Units are configured from the factory to have Independent Circuit defrost (RTRM input J9-3 tied to ground with RTRM input J1-5 OPEN).
Table 4. Heat pump operation with thermostat Inputs
10
Outputs
Y1
Y2
G
W1
W2
O
X2
Cool
Heat1
Indoor Fan
ON
OFF
Don't Care
Don't Care
OFF
HEAT
OFF
OFF
Stage 1
ON
OFF
ON
Don't Care
Don't Care
OFF
HEAT
OFF
OFF
Stage 2
ON
ON
ON
Don't Care
Don't Care
OFF
HEAT
OFF
OFF
Stage 1 + Stage 2
ON
ON
OFF
Don't Care
Don't Care
ON
HEAT
OFF
OFF
Stage 1 + Auxiliary
ON
OFF
ON
Don't Care
Don't Care
ON
HEAT
OFF
OFF
Stage 2 + Auxiliary
ON
ON
ON
Don't Care
Don't Care
ON
HEAT
OFF
OFF
Stage 1 + Stage 2 + Auxiliary
ON
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Table 4. Heat pump operation with thermostat (continued) Inputs
Outputs
Y1
Y2
G
W1
W2
O
X2
Cool
Heat1
Indoor Fan
Don't Care
Don't Care
Don't Care
Don't Care
Don't Care
Don't Care
ON
OFF
Em Heat
ON
Note: Stage 1 = Circuit 1 and Stage 2 = Circuit 2
Table 5. Heat pump operation with a zone sensor with lead/lag enabled
Table 5. Heat pump operation with a zone sensor with lead/lag enabled (continued)
Heating Request
Circuit Output
Heating Request
Circuit Output
0 (None)
All Off
0 (None)
All Off
1
Circuit 1
1
Circuit 2 + Circuit 1
2
Circuit 2 + Circuit 1
2
Circuit 1 + Circuit 2
3
Auxiliary Heat 1
3
Auxiliary Heat 1
4
Auxiliary Heat 2
4
Auxiliary Heat 2
Table 6. Heat pump control (1-step mechanical heating)
(a) (b)
Active Unit Mode
Stage
Indoor Fan
Compressor
Auxiliary Heat 1
Auxiliary Heat 2
Switchover Valve 1
Switchover Valve 2(a)
Heat/Off
Off
Off
Off
Off
Off
Off
Off
Heat
Stage 1
On
Both Compressors
Off
Off
Off
Off
Heat
Auxiliary 1
On
Both Compressors
On
Off
Off
Off
Heat
Auxiliary 2
On
Both Compressors
On
On
Off
Off
Emergency Heat
Stage 1
On
Off
On
Off
Off
Off
Emergency Heat
Stage 2
On
Off
On
On
Off
Off
Heat
Defrost
On
Both Compressors
On
Off
On(b)
On(b)
Cool
Don’t Care
Off
Off
Off
Off
On
On
Only units configured as an independent circuit heat pump will control the switchover valve 2 output. On units with independent circuits, only the circuit whose conditions are correct for defrost will enter defrost mode and energize the switchover valve. The other circuit's switchover valve will remain in its previous state until it has a defrost request or until the unit mode changes.
Table 7. Heat pump control (2-step mechanical heating) Active Unit Mode
Stage
Indoor Fan
Compressor
Auxiliary Heat 1
Auxiliary Heat 2
Switchover Valve 1
Switchover Valve 2(a)
Heat/Off
Off
Off
Off
Off
Off
Off
Off
Heat
Stage 1
On
Compressor 1
Off
Off
Off
Off
Heat
Stage 2
On
Both Compressors
Off
Off
Off
Off
Heat
Auxiliary 1
On
Both Compressors
On
Off
Off
Off
Heat
Auxiliary 2
On
Both Compressors
On
On
Off
Off
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Table 7. Heat pump control (2-step mechanical heating) (continued)
(a) (b)
12
Active Unit Mode
Stage
Indoor Fan
Compressor
Auxiliary Heat 1
Auxiliary Heat 2
Switchover Valve 1
Switchover Valve 2(a)
Emergency Heat
Stage 1
On
Off
On
Off
Off
Off
Emergency Heat
Stage 2
On
Off
On
On
Off
Off
Heat
Defrost
On
Both Compressors
On
Off
On(b)
On(b)
Cool
Don’t Care
Off
Off
Off
Off
On
On
Only units configured as an independent circuit heat pump will control the switchover valve 2 output. On units with independent circuits, only the circuit whose conditions are correct for defrost will enter defrost mode and energize the switchover valve. The other circuit's switchover valve will remain in its previous state until it has a defrost request or until the unit mode changes.
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Pressure Curves Figure 3. TWA090D Cooling TWA090D with TWE090D (English)
TWA090D with TWE090D (Metric) Suction Pre s s ure a t 4 0 0 CFM/ Ton 1150
160
1100
150 140 130 120 68/ 57 74/ 62 80/ 67 86/ 72
110 100 55
65
75
85
95
105
115
DB/ WB DB/ WB DB/ WB DB/ WB
Su ction Pre s s u re - kPa
Su ction Pre s s u re - p s ig
Suction Pre s s ure a t 4 0 0 CFM/ Ton 170
1050 1000 950 900 850 20/ 14 23/ 17 27/ 19 30/ 22
800 750 13
125
18
24
600
4250
550 500 450 400 350 300
68/ 57 74/ 62 80/ 67 86/ 72
250 200 75
85
95
Amb ie n t DB - De gre e F
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41
46
52
Dis cha rge Pre s s ure a t 4 0 0 CFM/ Ton 4500
105
115
DB/ WB DB/ WB DB/ WB DB/ WB
125
Dis ch a rge Pre s s u re - kPa
Dis c h a rge Pre s s u re - p s ig
Dis ch a rge Pre s s u re a t 4 0 0 CFM/ Ton 650
65
35
Amb ie n t DB - De gre e C
Amb ie n t DB - De gre e F
55
29
DB/ WB DB/ WB DB/ WB DB/ WB
4000 3750 3500 3250 3000 2750 2500 2250
20/ 14 23/ 17 27/ 19 30/ 22
2000 1750 1500 13
18
24
29
35
41
46
DB/ WB DB/ WB DB/ WB DB/ WB
52
Amb ie n t DB - De gre e C
13
Pr e s s u r e C u r v e s
Figure 4. TWA090D Heating
TWA090D with TWE090D (English)
TWA090D with TWE090D (Metric) Suction Pre s s ure a t 4 0 0 CFM/ Ton
Suction Pre s s ure a t 4 0 0 CFM/ Ton 1000
140
900
120 110 100 90 80 70 60 60 DB
50
Su ction Pre s s u re - kPa
Su ction Pre s s u re - p s ig
130
5
10
15
20
25
30
35
40
45
50
55
60
65
600 500 400 16 DB 21 DB 27 DB
80 DB
200
30 0
700
300
70 DB
40
800
-18
70
-15
-12
-9
-7
Dis ch a rge Pre s s u re a t 4 0 0 CFM/ Ton
2
4
7
10
13
16
18
21
Dis ch a rge Pre s s u re a t 4 0 0 CFM/ Ton
380 360 340 320 300 280 260
60 DB
240
70 DB 80 DB
220 0
5
10
15
20
25
30
35
40
45
Amb ie n t DB - De gre e F
50
55
60
65
70
Dis ch a rge Pre s s u re - kPa
400
Dis ch a rge Pre s s u re - p s ig
-1
2900
420
14
-4
Amb ie n t DB - De gre e C
Amb ie n t DB - De gre e F
2700 2500 2300 2100 1900 16 DB
1700
21 DB 27 DB
1500 -18
-15
-12
-9
-7
-4
-1
2
4
7
10
13
16
18
21
Amb ie n t DB - De gre e C
SSP-SVF03B-EN
Charging Charts and Superheat Figure 5. TWA090D Cooling
Figure 6. TWA090D Heating TWA090D Ch a rg in g Cu rv e - He a tin g Mo d e
TWA090D Ch a rg in g Cu rve - Co o lin g Mo d e 400
650 625
75°F Return Air
600
375
Re m o v e c h a rg e
575 350
525
Dis c h a rg e P re s s u re , p s ig
Dis c h a rg e P re s s u re , p s ig
550
Re m o ve c h a rg e
500 475 450 425 400 375
Ad d c h a rg e
350 325
65°F Return Air
325 55°F Return Air
300
275
250
Ad d c h a rg e
300 275
225
250 225
200
200
0
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
5
10
140
15
20
25
30
35
40
45
50
55
60
65
70
75
80
Amb ie n t Te mp e ra tu re , °F
Liq u id Te mp e ra tu re Le a vin g OD Co il, °F
Table 8. TWA superheat with matched TWE air handler Cooling Superheat
Heating Superheat
Condenser
Air Handler
Circuit 1
Circuit 2
Circuit 1
Circuit 2
TWA090D
TWE090D
16.0
—
15.7
—
Notes: 1. An adjustable TXV is provided for each circuit in the TWE and TWA models. If the application causes the superheat to deviate from the values shown above by more than 1 degree - after the system has achieved steady state - the TXV should be adjusted to provide the values shown as measured at the compressor. 2. The values given above have been tested and are approved for the matched sets shown. If an alternate combination is used, an expansion device should be used that provides 16-20°F degrees of superheat measured at the compressor. 3. Check and adjust superheat using this table, then compare with charging chart to determine if charge corrections are necessary.
SSP-SVF03B-EN
15
Troubleshooting
CHECK VALVE LEAKING
CHECK INLINE FUSE
SOV LEAKING
SOV COIL DEFECTIVE
REF. CIRCUIT RESTRICTIONS
S
SUPERHEAT
P
RESTRICTED I.D. AIRFLOW
O.D. AIR RECIRCULATION
S
TXV STUCK OPEN
NONCONDENSABLES
RESTRICTED O.D. AIRFLOW
EXCESSIVE EVAP. LOAD
REFRIGERANT OVERCHARGE
INEFFICIENT COMPRESSOR
REFRIGERANT UNDERCHARGE
THERMOSTAT
CONTACTOR COIL
LOW VOLTAGE WIRING
CONTROL TRANSFORMER
CONTACTOR CONTACTS
COMPR. IOL
RUN CAPACITOR
POWER SUPPLY
HIGH VOLTAGE WIRING
SYSTEM FAULTS
WHAT TO CHECK MODE
Table 9. TWA heat pump troubleshooting
REFRIGERANT CIRCUIT Head pressure too high Head pressure too low Suction pressure too high Suction pressure too low Liquid refrig. foodback (TXV system) I.D. coil frosting Compressor runs inadequate or no cooling/heating
C
P
H
P
S
S P
S
C
S
P
S
S
S
S
H
S
P
S
S
S
S
P
C
S
P
S
P
H
S
S
P
C
P
H
P
P
P
S
P
P
S
P
P
S
P
S
P
C
P
H
P
C
P
P
S S P P
P
S
H C
S
P
H
S
P
P
S
S
P
S
S
S
S
P
S
S
S
S S
ELECTRICAL Compressor & O.D. fan don’t start Compr. won’t start but O.D. fan runs
O.D. fan won't start Compressor hums but won't start Compressor cycles on IOL
I.D. blower won't start
C
P
P
S
P
S
P
H
P
P
S
P
S
P
C
P
S
S
H
P
S
C
P
P
H
P
P
C
P
H
P
C
P
S
S
S
P
P
S
S
S
P
S
H
P
S
S
S
P
P
S
S
S
P
S
S S S S S
C
P
S
S
P
S
H
P
S
S
P
S P
Crankcase heater does not function (a) DEFROST Unit won’t initiate defrost Defrost terminates on time Unit icing up
C H
P
C H
P
C H
P
S
S
P
C Cooling H Heating P Primary Causes S Secondary Causes (a)
16
This applies only to the 20 ton, 208V/230V unit (TWA240*3****).
SSP-SVF03B-EN
Notes
SSP-SVF03B-EN
17
Notes
18
SSP-SVF03B-EN
Notes
SSP-SVF03B-EN
19
Notes
The manufacturer optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, the manufacturer offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.IRCO.com. The manufacturer has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. ©2015 Trane
All rights reserved
SSP-SVF03B-EN 14 Aug 2015
We are committed to using environmentally
Supersedes SSP-SVF03A-EN (December 2011)
conscious print practices that reduce waste.
