Piping Connection - Carrier FDT21 Operation & Installation Manual

PIPING CONNECTION

CONNECTING THE PIPES
·
Do not remove the cap from the pipes until just before
connecting them. This is to prevent humidity or dirt from
entering the pipes.
·
If a pipe is bent too many times, it will become stiff: do not
bend the same part of the pipe more than 3 times. When
unwinding the pipe, be careful not to pull it. Unroll it as
shown in the figure.
10.1 CONNECTION TO THE INDOOR UNIT
·
Bend the connection pipes following the correct path.
·
Remove the flare nut from the indoor unit piping
(check that here is no debris inside).
·
Insert the flare nut and apply the flare at the end of
the connection pipe
·
Connect the pipes using two wrenches.
10.2 CONNECTION TO THE OUTDOOR UNIT
Tighten the flare nut to the piping ports of the outdoor unit with the
same tightening method as that used for the indoor unit.
To prevent leakages pay special attention to the following points:
·
Tighten the connectors using two wrenches. Take care not to
damage the pipes.
·
If the tightening torque is not sufficient, there will probably be leakages. If the torque is too great, there could be leaks
because it is easy to damage the flange.
·
The safest way to tighten the connection is to use a standard wrench and a torque wrench: in this case, use the following table.
Note: Connect the pipes with connector set by soldering for gas pipe size
Pipe Size fastening torque (kgf*m)
1/4"
3/8"
1/2"
5/8"
3/4"
7/8"
1-1/8"
18
INSTALLATION INSTRUCTIONS
YES
Indoor Unit tubing
Wrench
indoor unit.
gas valve
service
port
tap
1.8 - 2.5
3.4 - 4.2
5.5 - 6.6
6.3 - 8.2
9.9 - 12.1
9.9 - 12.1
12.4 - 14.7
Ø
NO
Flare Nut Pipes
Wrench
liquid
valve
tap
protection
caps
7/8" - 1-1/8"
Ø