Trane 4WCY4036B3 - Page 17

18-BB34D1-19B-EN
17
COMMON
FAN
COMPRSSOR
1ST STAGE ELECTRIC HEAT
2ND STAGE ELECTRIC HEAT
SWITCHOVER VALVE
DEFROST CONTROL 'T' SIGNAL
24 VOLTS
B
G
Y
W1
W2
O
T
R
UNIT LOW VOLTAGE AREA
TYPICAL THERMOSTAT
UNIT HEATER AREA
ELECTRIC
HEATER
CONTROL
BOX
POLARIZED
PLUG
UNIT CONTROL BOX
3 PH
POWER
UNIT
NOTE 1,8
3 PH
POWER
HEATER
1 PH
POWER
1 PH
POWER
UNIT CONTROL
BOX
UNIT HEATER AREA
FACTORY PROVIDED
FIELD CONNECTED
WIRES
(BL)
(YL)
(GR)
(PR)
(OR)
(OR)
B
G
Y
W1
W2
O
T
R
(BR)
(RD)
(GR)
(BL)
(WH)
(WH)
(YL)
(OR)
1 PH
POWER
3 PH
POWER
GROUND
WIRE
SINGLE POWR ENTRY
W1
W2
(WH)
(WH)
W 1
W 2
(WH)
(WH)
HEATER SECOND STAGE AMBIENT
TEMPERATURE LOCKOUT
NOTE 7,8
UNIT LOW
VOLTAGE
AREA
OUTDOOR
THERMOSTAT
ACCESSORY
BAYSTAT033A
NOTE 10
HEATER AMBIENT
TEMPERATURE LOCKOUT
NOTE 7,8
UNIT LOW
VOLTAGE
AREA
OUTDOOR
THERMOSTAT
ACCESSORY
BAYSTAT033A
NOTE 10
TYPICAL THERMOSTAT
TYPICAL THERMOSTAT
TYPICAL 2-STAGE
THERMOSTAT
UNIT LOW
VOLTAGE AREA
UNIT LOW
VOLTAGE AREA
TO COMPR.
CONTACTOR
ELECTRIC
HEATER
CONTROL
BOX
HEATER
FUSES
UNIT
FUSES
SPE
ACCESSORY
KIT
TO ECONOMIZER
FACTORY PROVIDED
FIELD INSTALLED WIRES
NOTE 9
(NOT APPLICABLE TO THE
WCM---F MODELS)
FIG. 3 OUTDOOR THERMOSTAT ACCESSORY CONNECTIONS
FIG. 1
SINGLE POWER ENTRY ACCESSORY CONNECTIONS FIG. 2 ECONOMIZER ACCESSORY
CONNECTIONS
GROUND
WIRE
SEE SPEK INSTALLER'S GUIDE
FOR ALL OTHER EXAMPLES
NOTES:
1. FUSED DISCONNECT SIZE, POW ER W IRING AND GROUNDING
OF EQUIPMENT M UST COM PLY W ITH CODES.
2. BE SURE POW ER SUPPLY AGREES W ITH EQUIPMENT AND
HEATER NAM EPLATE.
3. LOW VOLTAGE W IRING TO BE 18 AW G M INIM UM CONDUCTOR.
4. SEE HEATER NAMEPLATE FOR CURRENT RATING OF HEATER
USED.
5. SEE UNIT AND HEATER DIAGRAM FOR ELECTRICAL CONNEC-
TION DETAILS.
6. IF ELECTRIC HEATER ACCESSORY IS NOT INSTALLED OM IT
THE ELECTRIC HEATER, ASSOCIATED POW ER W IRES AND THE
‘W ’ AND ‘X2’ THERMOSTAT W IRES.
7. FIG. 3 DEM ONSTRATES CONNECTION OF THE OUTDOOR
THERMOSTAT ACCESSORY ONLY. FOR FURTHER UNIT
CONNECTION DETAILS REFER TO THE OTHER FIGURES.
8. THE 41A(BR) W IRE IS FIRST STAGE ELECTRIC HEAT. IF THE
ELECTRIC HEATER ACCESSORY HAS TW O HEATING STAGES
THE 41C(BR) W IRE IS SECOND STAGE ELECTRIC HEAT.
9. W HEN THE BAYECON054A OR –055A ECONOM IZER IS
INSTALLED THE BAYRLAY003 RELAY ACCESSORY KIT IS
REQUIRED TO INTERFACE THE ECONOM IZER TO THE HEAT
PUMP FOR PROPER SYSTEM OPERATION. W HEN THE
BAYECON054B OR –055B OR 073A ECONOM IZER IS
INSTALLED, THE BAYRLAY004A RELAY ACCESSORY KIT IS
REQUIRED TO INTERFACE THE ECONOM IZER TO THE HEAT
PUMP FOR PROPER SYSTEM OPERATION.
10. THE BAYSTAT033A OUTDOOR THERM OSTAT ACCESSORY KIT
CONTAINS A THERM OSTAT AND A RELAY. THE RELAY IS NOT
REQUIRED TO BE USED IN THIS APPLICATION.
CCoonnttrrooll WWiirriinngg ((CCllaassss IIII))
Low voltage control wiring should not be run in conduit
with power wiring unless Class 1 wire of proper voltage
rating is used. Route the thermostat cable or equivalent
single leads of No. 18 AWG colored wire from the
thermostat subbase terminals through the rubber
grommet on the unit. See “Determine Unit
Clearances,” p. 7 for the control entry (24V Entry)
location. Make connections as shown on the wiring
diagrams.
Do not short thermostat wires since this will damage
the control transformer.
Refer to the table below for recommended wire sizes
and lengths for installing the unit thermostat. The total
resistance of these low voltage wires must not exceed
one (1) ohm. Any resistance in excess of 1 ohm may
cause the control to malfunction because of the
excessive voltage drop.
Table 10. Thermostat Wire Size and Maximum
Length
Wire Size
Maximum Length (Ft)
18 75
16 125
14 200
IImmppoorrttaanntt:: Upon completion of wiring, check all
electrical connections, including factory
wiring within the unit, and make sure all
connections are tight. Replace and secure
all electrical box covers and access panels
before leaving the unit or turning on the
power to the unit.
UUnniitt IInnssttaallllaattiioonn