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Field Wiring – Heat Pumps
GROUND
WIRE
1 PH
1 PH
POWER
POWER
TYPICAL THERMOSTAT
3 PH
3 PH
POWER
POWER
UNIT
HEATER
NOTE 1,8
FIG. 1
SINGLE POWER ENTRY ACCESSORY CONNECTIONS
UNIT HEATER AREA
UNIT CONTROL
BOX
FACTORY PROVIDED
FIELD CONNECTED
WIRES
TO COMPR.
CONTACTOR
SPE
ACCESSORY
KIT
UNIT LOW
VOLTAGE AREA
GROUND
WIRE
1 PH
SEE SPEK INSTALLER'S GUIDE
POWER
FOR ALL OTHER EXAMPLES
3 PH
POWER
SINGLE POWR ENTRY
FIG. 3
OUTDOOR THERMOSTAT ACCESSORY CONNECTIONS
HEATER SECOND STAGE AMBIENT
TEMPERATURE LOCKOUT
NOTE 7,8
UNIT LOW
VOLTAGE
AREA
OUTDOOR
THERMOSTAT
ACCESSORY
BAYSTAT033A
NOTE 10
TYPICAL THERMOSTAT
8
Figure 3. Field Wiring
PACKAGED HEAT PUMP UNIT
UNIT CONTROL BOX
B
COMMON
G
FAN
Y
COMPRSSOR
1ST STAGE ELECTRIC HEAT
W1
2ND STAGE ELECTRIC HEAT
W2
O
SWITCHOVER VALVE
T
DEFROST CONTROL 'T' SIGNAL
R
24 VOLTS
UNIT LOW VOLTAGE AREA
FIG. 2
TO ECONOMIZER
FACTORY PROVIDED
FIELD INSTALLED WIRES
NOTE 9
ELECTRIC
HEATER
CONTROL
BOX
UNIT
HEATER
FUSES
FUSES
UNIT LOW
VOLTAGE AREA
UNIT LOW
(WH)
W1
VOLTAGE
AREA
W2
(WH)
TYPICAL THERMOSTAT
UNIT HEATER AREA
POLARIZED
PLUG
ELECTRIC
HEATER
CONTROL
BOX
ECONOMIZER ACCESSORY
CONNECTIONS
(NOT APPLICABLE TO THE
WCM---F MODELS)
(BL)
(BL)
B
(YL)
(GR)
(GR)
G
(PR)
Y
(YL)
(WH)
W1
W2
(WH)
(OR)
(OR)
O
(OR)
(BR)
T
(RD)
R
TYPICAL 2-STAGE
THERMOSTAT
HEATER AMBIENT
TEMPERATURE LOCKOUT
NOTE 7,8
(WH)
W1
(WH)
W2
OUTDOOR
THERMOSTAT
ACCESSORY
BAYSTAT033A
NOTE 10
Notes:
1.
Fused disconnect size, power wiring
and grounding of equipment must
comply with codes..
2.
Be sure power supply agrees with
equipment and heater nameplate.
3.
Low voltage wiring to be 18 AWG
minimum conductor.
4.
See heater nameplate for current
rating of heater used.
5.
See unit and heater diagram for
electrical connection details.
6.
If electric heater accessory is not
installed, omit the electric heater,
associated power wires and the "W"
and "X2" thermostat wires.
7.
Fig 3 demonstrates connection of the
outdoor thermostat accessory only. For
further unit connection details refer to
the other figures.
8.
The W1 wire is first stage electric heat.
If the electric heater accessory has two
heating stages, the W2 wire is second
stage electric heat..
9.
When the BAYECON101A/102A or
BAYECON200A/201A economizer is
installed, the BAYRLAY004A relay
accessory kit is required to interface
the economizer to the heat pump for
proper system operation.
10. The BAYSTAT033A outdoor thermostat
accessory kit contains a thermostat
and a relay. The relay is not required to
be used in this application.
18-HB20D4-1E-EN
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