Installation guide

WheninstallingaTXVonanindoorcoil,followtheinstructions
providedwiththenewTXV.
AtypicalTXVinstallationisshowninFig.2.
EQUALIZER
TUBE
SENSING SUCTION
BULB TUBE
LIQUID
TUBE
TXV
SENSING BULB
(EITHER SIDE)
\
STRAP
8 O'CLOCK 4 O'CLOCK
Fig. 2 - Typical TXV Installation
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.
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. 3.
OUTDOORWALL--X '"DOORWALy
CAU LK_ _J
_/_'_ ' _[ r LLIQUIDTUBE
---el ---4 m/_[ _---SUCTIONTUBE
_-'-INSU LATION
THROUGH THE WALL
HANGER STRAP
(AROUND SUCTION _ --
TUBE_N
_/---JOIST
/ _ INSULATION
/SUCTION TUBE
1" (25.4 mm_ _
MIN _-- LIQUID TUBE
SUSPENSION
A07588
Fig. 3 - Routing and Suspending Refrigerant Lines
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal iniury
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.
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper
product operation.
Do not bury more than 36" (1 m) of line set underground.
Refrigerant may migrate to cooler buried section during
extended periods of unit shut-down, causing refrigerant
slugging and possible compressor damage at start-up.
If ANY section of the line set is buried underground,
provide a minimum 6" (152 mm) vertical rise at the service
valve.