Refrigeration System - Payne PA13NR018 Installation Instructions Manual

REFRIGERATION SYSTEM
A. COMPONENT MATCHES
Check to see that the proper system components are in place,
especially the indoor coil.
R-22 outdoor units can only be used with R-22 specific indoor
coils. If there is a refrigerant mis-match, consult the indoor coil
manufacturer to determine if a refrigerant conversion kit is
available for the indoor coil.
This outdoor unit is designed for use only with indoor coils that
utilize a TXV refrigerant metering device. If any other type of
metering device is installed on the indoor coil, consult the indoor
coil manufacturer to determine if a TXV conversion kit is available
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation.
This unit utilizes R-22 refrigerant. Use only R-22
refrigerant when servicing this unit.
DO NOT under any circumstances use R-410A refrigerant
in this system.
When installing a TXV on an indoor coil, follow the instructions
provided with the new TXV.
A typical TXV installation is shown in Fig. 3.
B. REFRIGERANT LINE SETS
The refrigerant line set must be properly sized to assure maximum
efficiency and proper oil circulation.
Refer to Long Line Guideline for line set sizing.
NOTE: Total line set length must not exceed 200 feet (61 m).
A crankcase heater must be used when the refrigerant line length
exceeds 80 feet (24.4 m).
If vertical separation between indoor and outdoor units is greater
than 30 ft (9.14 m), refer to the Long Line Guideline.
If it is necessary to add refrigerant line in the field, use dehydrated
or dry, sealed, deoxidized, copper refrigeration tubing. Do not use
copper water pipe.
Do not remove rubber plugs or caps from copper tubing until
connections are ready to be made.
Be extra careful when bending refrigeration tubing. Tubing can
"kink" easily, and if this occurs, the entire length of tubing must be
replaced.
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury
and/or death,
Relieve pressure and recover all refrigerant before servicing
existing equipment, and before final unit disposal, Use all
service ports and open all flow-control devices, including
solenoid valves,
EQUALIZER
TUBE
SENSING SUCTION
BULB TUBE
TXV
SENSING BULB
(EITHER SIDE)
N
8 O'CLOCK
4
Fig. 3 - Typical TXV Installation
LIQUID
TUBE
STRAP
O'CLOCK
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation.
Do not leave system open to atmosphere any longer than
absolutely required for installation. Internal system
components - especially refrigerant oils - are extremely
susceptible to moisture contamination. Keep ends of tubing
sealed during installation until the last possible moment.
C. ROUTING AND SUSPENDING REFRIGERANT LINES
Run refrigerant lines as straight and direct as possible, avoiding
unnecessary bends and turns. Always insulate the entire suction
line. Both lines should be insulated when routed through an attic or
when routed through an underground raceway.
When routing refrigerant lines through a foundation or wall, do not
allow refrigerant lines to come in direct contact with the building
structure.
Make openings large enough so that lines can be wrapped with
extra insulation. Fill all gaps with RTV caulk. This will prevent
noise transmission between the tubing and the foundation or wall.
Along floor or ceiling joists, suspend refrigerant lines so that they
do not contact the building structure, water pipes, or ductwork. Use
insulated or suspension type hangers. Metal straps must be at least
1" (25 mm) wide to avoid cutting into the tube insulation. Keep the
liquid and suction lines separate. Refer to Fig. 4.