Lennox Signature XP21 Series User Manual

Page 5
XP21
Typical Unit Parts Arrangement
GROUND LUGS
HIGH VOLTAGE FIELD
CONNECTIONS
CONTACTOR−1POLE
(K1−1)
HEAT PUMP CONTROL (A175)
CAPACITOR (C12)
FAN MOTOR CONTROL (A177)  PULSE−WIDTH
MODULATION (PWM) (ONLY ON UNITS WITH MAIN
CONTROL 101796−XX)
WIRE TIE
RT13 OUTDOOR
AMBIENT
TEMPERATURE
SENSOR
VAPOR VALVE
AND GAUGE
PORT
REVERSING
VALVE
LIQUID LINE BI−FLOW
FILTER DRIER
HIGH PRESSURE
SWITCH (S4)
LIQUID VALVE AND
GAUGE PORT
TRUE SUCTION LINE
PORT
LOW PRESSURE
SWITCH (S87)
CRANKCASE HEATER THERMOSTAT (S40)
HR1 CRANKCASE HEATER
COMPRESSOR
MUFFLER
DISCHARGE LINE
CHECK
EXPANSION VALVE
DISCHARGE LINE
TEMPERATURE SENSOR
(RT28)
COIL TEMPERATURE SENSOR (RT21) − ON
RETURN BEND, 12 TUBES UP FROM
BOTTOM (11.50’ UP)
XP21−024 AND −036
XP21−048 AND −060
COIL TEMPERATURE
SENSOR (RT21) − ON
RETURN BEND, 24
TUBES UP FROM
BOTTOM (23.50’ UP)
FAN MOTOR SURGE PROTECTION (ONLY
ON XP21−XXX−230−01 BUILD. STARTING
WITH BUILD −02, SURGE PROTECTION
BUILT INTO FAN MOTOR)
Figure 1. Plumbing, Switches and Sensor Components

Lennox Signature XP21 Series Specifications

General

Brand	Lennox
Model	Signature XP21 Series
Category	Heat Pump
Language	English