4
Step 6 — In Long--Line Applications, Install
Liquid--Line Solenoid Valve (LSV)
For refrigerant piping arrangements with equivalent lengths of
greater than 80 ft. (24.38 m) and/or when elevation difference
between indoor and outdoor unit is greater than
20 ft. (
6.10 m),
follow the piping configuration and liquid line solenoid valve
(LSV) accessory requirements from the Residential Piping and
Long--line guideline. CCH, start gear and piston changes do not
apply. If required by Long--Line Guideline, install LSV kit, part
no. KHALS0401LLS, specifically designed for Puron
refrigerant
heat pumps. LSV should be installed within 2 ft. (0.61 m) of
outdoor unit with flow arrow pointing toward outdoor unit.
Make the necessary electrical connections as shown on Fig. 21 and
by following the Installation Instructions included with accessory
kit.
IMPORTANT
: Flow arrow must point toward outdoor unit.
Green
Yellow
White
ABCD
Connection (optional)
Red
LLS
LS
User Interface
Optional Remote
Room Sensor
Furnace or
Fan Coil
Variable
Speed
HP
A
B
C
D
C
S2
A
B
C
D
A
B
C
D
S1
A11107
Fig. 4 -- Liquid Line Solenoid Electrical Connection
(Required for long line applications)
Step 7 — Make Piping Connections
!
WARNING
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this warning could result in personal injury or
death.
Relieve pressure and recover all refrigerant before system
repair or final unit disposal. Use all service ports and open all
flow--control devices, including solenoid valves.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not leave system open to atmosphere any longer than
minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
If ANY refrigerant tubing is buried, provide a 6 in. (152.4
mm) vertical rise at service valve. Refrigerant tubing lengths
up to 36 in. (914.4 mm) may be buried without further
special consideration. Do not bury lines longer than 36 in.
(914.4 mm).
Outdoor units may be connected to indoor section using accessory
tubing package or field--supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 80 ft. (24.38
m), substantial capacity and performance losses can occur. Follow
the pipe sizing recommendations in the 25VNA Product data to
manage these losses.
Refer to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
