4
Heat Pump ABOVE Indoor Coil
Maximum vertical
separation of 200 ft.
*Includes pressure losses of any elbow, bends, etc.
Maximum line set
equivalent length of 250 ft.*
The maximum line set
actual length is 200 ft.
mode and/or if the temperature inside the conditioned space may
reach a temperature lower than ambient in heating mode. Never
attach a liquid line to any uninsulated potion of the gas line.
Do NOT let refrigerant lines come in direct contact with plumbing,
ductwork, floor joists, wall studs, floors, and walls. When run-
ning refrigerant lines through a foundation or wall, openings
should allow for sound and vibration absorbing material to be
placed or installed between tubing and foundation. Any gap be-
tween foundation or wall and refrigerant lines should be filled
with a pliable silicon-based caulk, RTV or a vibration damping
material. Avoid suspending refrigerant tubing from joists and
studs with rigid wire or straps that would come in contact with
the tubing. Use an insulated or suspension type hanger. Keep
both lines separate and always insulate the gas line.
Insulation is necessary to prevent condensation from forming
and dropping from the gas line. Armflex or satisfactory equiva-
lent with 3/8” min. wall thickness is recommended. In severe
conditions (hot, high humidity areas) 1/2” insulation may be re-
quired. Insulation must be installed in a manner which protects
tubing and connections from damage and contamination.
Where possible, drain as much residual compressor oil from ex-
isting systems, lines, and traps; pay close attention to low areas
where oil may collect.
NOTE:
If changing refrigerant, the indoor
coil and metering device must be replaced. Only AV**PVC air
handlers or TXV** expansion valves are compatible and have been
manufacturer approved for use with these models. See unit speci-
fications or AHRI for an approved system match.
Oil Trap Construction
LONG RADIUS
STREET ELL
SHORT RADIUS
STREET ELL
STREET
ELL
Heat Pump BELOW Indoor Coil
Maximum line set
equivalent length of 250 ft*.
The maximum line set actual length is 200 ft.
*Includes pressure losses of any elbow, bends, etc.
