Page 3
I – UNIT INFORMATION
HP23 units are available in 1, 1 -1/2, 2, 2 -1/2, 3, 3 -1/2, 4
and 5 ton capacities.
All major components (indoor blower/coil) must be
matched according to Lennox recommendations for
the compressor to be covered under warranty. Refer to
the Engineering Handbook for approved system
matchups. A misapplied system will cause erratic
operation and can result in early compressor failure.
II – UNIT COMPONENTS
Unit components are illustrated in figures 1 and 2.
COMPRESSOR
HP23-141 SHOWN
EXPANSION
VALVE
CONTROL
BOX
REVERSING VALVE
SUCTION
MUFFLER HP23-141
ONLY
OUTDOOR
FAN/MOTOR
HP23-141, -210, -260, -310 and -410
UNIT COMPONENTS
ACCUMULATOR
HP23-141 ONLY
FIGURE 1
HP23-460, -510 and -650 UNIT COMPONENTS
REVERSING VALVE
ACCUMULATOR
COMPRESSOR
OUTDOOR
FAN/MOTOR
CONTROL BOX
EXPANSION
VALVE
FIGURE 2
FAN
SPIDER
A – Control Box (Figures 3 and 4)
FIGURE 3
DUAL CAPACITOR
(C12)
START CAPACITOR
(C7)
POTENTIAL
RELAY (K31)
COMPRESSOR
CONTACTOR
(K1)
HP23 UNIT CONTROL BOX SINGLE PHASE UNITS
GROUNDING
LUG
DEFROST
RELAY (K4)
DEFROST
CONTROL
CMC1
LOW VOLTAGE
MAKEUP
AREA
TIMED OFF
CONTROL (A4)
HP24-651 ONLY
FIGURE 4
FAN CAPACITOR
(C1)
HP23 UNIT CONTROL BOX THREE PHASE UNITS
TRANSFORMER(T5)
“J” VOLTAGE
UNITS ONLY
GROUNDING
LUG
COMPRESSOR
CONTACTOR
(K1)
DEFROST
RELAY (K4)
DEFROST
CONTROL
CMC1
LOW VOLTAGE
MAKEUP
AREA
TIMED OFF
CONTROL (A4)
HP24-653 ONLY
A low voltage make up area is provided for thermostat
field wiring. Field thermostat wiring is made to color
coded pigtail connections as illustrated in figure 5.
FIGURE5
THERMOSTAT WIRING IDENTIFICATION
BLACK
BEIGE
ORANGE
YELLOW
RED
FROM OUTDOOR UNIT
TO INDOOR UNIT/
THERMOST
A
T
24V (POWER) INPUT
TO OUTDOOR UNIT
(COMPRESSOR)
(REVERSING VALVE)
(ELECTRIC HEAT)
(COMMON)
INPUT
INPUT
DEFROST OUTPUT
