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8.5 Refrigerant Tubing
GENERAL WARNINGS!
The outdoor unit is supplied with a sufficient refrigerant charge of R410a for the maximum design
length (no extra refrigerant required. Beyond this length, additional refrigerant is required and must
be weighed in (see specifications).
The indoor unit contains a small quantity of nitrogen. DO NOT remove the caps until tubing is ready
to be installed.
When removing the valve caps, DO NOT stand in front of valves as the system is under high pressure.
An oil trap is recommended to be installed if the indoor unit is over 15 feet in height from the
outdoor unit. To prevent kinking, bend tubes using a tubing tool.
DO NOT braze tubing or use thread sealant. Use flare connections only.
8.5.1 Torque Table for Flare Nuts
When tightening the nut with a spanner and torque wrench, please follow the torque
requests in the table below.
NOTE: Exceeding the tightening torque
will damage the flare surface.
8.5.2 Bundling the Lines
Bundle the refrigerant lines, control cables, and
condensation drain together as shown in the picture
below. Be sure to leave ample length on the control
cables for termination. Bundle can be secured together
using tape.
IMPORTANT: Condensate drain MUST be placed at the
bottom of the bundle as shown. Failure to do so may
cause evaporator to drain improperly.
Each tube must be insulated separately,
including their unions with at least 1/4” thick
insulation. Wrap the refrigeration tubing, drain
hose, and electrical cables with a UV protected
vinyl tape. Overlap insulation at all refrigeration
joints. Insulation joints may overlap if desired.
CAUTION: Failure to completely wrap both
lines with insulation may result in damage
from condensation forming on lines and
dripping onto wall, ceilings, etc.
Vin yl tap e
Co n n e ctio n p ip e
(h e a t in sula tio n )
In d o o r u n it p ip in g
Bin d the s to g e the r
so th a t the r e is n o g a p
p ip e
.
O ve r la p the in su la tio n
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