Lennox ASC Series Installation, Operating And Maintenance Manual page 13

1. GENERAL CHARACTERISTICS
1.5.- PIPING DRAWINGS
HEAT PUMP UNITS
AIR TREATMENT UNIT. EXAMPLE
UNIDAD INTERIOR
CIH 100D/120D/140D
Coil
DS
Fan
DS
Coil
Fan
Expansion valve
OPTIONAL ELEMENT
Pressure gauge (5/16" to be fi tted by the installer)
Discharge sensor
DS
SVL1
Liquid solenoid valve. (long distance option)
To be connected by the installer to air treatment unit.
SVL3
SVL2
Liquid solenoid valve. (long distance option)
SVL4
Low pressure switch, circuit 1
LPT1
Low pressure transducer, circuit 2
LPT2
• 12 •
Expansion
Filter drier
valve
Check valve Check
valve
112D/128D
Liquid receiver
Check valve
Filter drier
Check valve
Check
valve
CONDENSING UNIT
UNIDAD EXTERIOR
ASH 100D/120D/140D
Scroll compressor
LP1
LPT1
C1
Scroll compres-
sor
SVL1 SVL2
Check valve
LP2
LPT2
Scroll compressor
C2
SVL3 SVL4
Filter drier
Check valve
High pressure switch, circuit 1.
HP1
High pressure switch, circuit 2.
HP2
CH... Crankcase heater
High pressure transducer, circuit 1
HPT1
High pressure transducer, circuit 2
HPT2
Outdoor temperature sensor
OS
Installation, Operation and Maintenance manual • ASC/ASH-MIL152E-1217-01/2019
PT1
HPT1
4-way valve
Suction accumulator
(Long distance connection
option)
Suction accu-
Filter
mulator
drier
Expansion valve
Check valve
PT2
HPT2
4-way valve
Suction accumulator (Long
distance connection option)
Suction accumulator
Expansion valve
Check valve
Fan motor
Coil
OS
Fan motor
Coil