950-0206revE
- 18 -
February 12, 2015
Fl ar i ng
Set exact ly at t he posit ion show n below
A
Die
Flare tool f or R410A
Convent ional f lare t ool
Clut ch- t ype
Clut ch- t ype
( Rigid- t ype)
W ing- nut t ype
(Imperial-type)
A
0- 0.002"
0.003- 0.005"
0.005- 0.007"
Flaring the pipe end
CONNECTION OF THE REFRIGERANT PIPE
Cut the copper tubing end with a tubing cutter.
1. Remove burrs with the cut surface facing downward so that the chips do not enter the pipe.
2. Fit the flare nut to the copper tubing.
3. Flare the copper tubing.
4. Check that flaring is properly done.
CAUTION!
● Do not use any oil or pipe sealant on flared part that is not compatible with R410A.
● Never use a line set that has been used with refrigerants other than R410A.
● Never install a drier to this R410A unit.
● Poor flaring will cause refrigerant gas leakage.
Fla re
’
s in n e r
su rfa ce m u st
b e scra tch
-
fre e
Th e p ip e e n d m u st
b e e ve n ly fla re d in
a p e rfe ct circle
Cut exactly
at right
angles
Remove
burrs
Figure 10
M a ke su re th a t th e
fla re n u t is fitte d
Identify Line Sets
Mark the line sets as necessary to prevent crossed connections. Crossed line sets will prevent proper
operation.
Identify Interconnect Cables
Connect interconnect cable and identify cable at both ends. Cable routed to terminal from rear of
indoor unit.
Connecting Line Set
1. Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts.
2. Align the c e n t e r s of both flares and tighten the flares and the nuts 3 or 4 turns by hand.
Then tighten them with a spanner and torque wrench. See Figure 12 below.
3. To prevent gas leakage, apply refrigeration oil on both inner and outer surfaces in the flares. (Use
refrigeration oil for R410A). See Figure 12 below.
Torque wrench
Coat here with refrigeration oil only.
Spanner
Flare nut
Figure 11
Joint
Connection pipe
