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TYPICAL PIPING AND WIRING (CONT.)
Dual Condensing Units and a Dual Circuit Fan
RETURN
AIR
SUBBASE
ACCESSORY
15 DIAM
MIN
40RMQ024
UNIT
ELECTRIC
HEATER
ACCESSORY
24 V
CONTROL
WIRE
BULB CAPILLARY
TUBES
10 DIAM
MIN
CONDENSATE
DRAIN
8 DIAMS
MIN
DISCONNECT
PER NEC*
INSULATED
VAPOR LINE
SIGHT
GLASS*
FILTER
DRIER*
INSULATED
VAPOR LINE
LIQUID
LINE
HEAT PUMP
UNIT B
FUSED
DISCONNECT
PER NEC†
WEATHERPROOF
POWER WIRES
FIELD
SUPPLIED
POWER
FUSED
DISCONNECT†
PER NEC
WEATHERPROOF
HEAT PUMP
UNIT A
LIQUID
LINE
FIELD
SUPPLIED
POWER
POWER
WIRES
BIFLOW LIQUID
LINE SOLENOID
VALVE*
BIFLOW LIQUID LINE
SOLENOID VALVE*
LEGEND
*Field supplied.
†Field supplied; not required if FIOP disconnect is supplied.
DIAM — Diameter
NEC — National Electrical Code
TXV — Thermostatic Expansion Valve
Piping
NOTES:
1. All piping must follow standard refrigerant piping techniques. Refer to System
Design Manual for details.
2. All wiring must comply with applicable local and national codes.
3. Wiring and piping shown are general points-of-connection guides only and are not
intended for, or to include all details for, a specific installation.
4. Filter driers must be bi-flow type suited for heat pump duty.
5. Heat Pump Unit A should be the first on, last off and be connected to the lower half of
the coil.
6. Internal factory-supplied TXVs and check valves not shown.
C101131
569J