Installation Guide

6
Page 28
mrcool.com
Refrigerant Piping Connection
Fig. 6.1
≥4in (10cm)
Carefully unroll to indoor
handler connection
Connect directly to
exterior condensor
Keep excess coiled
Radius
1. Use your hands to slowly unwind the copper piping (Quick Connect
®
line set). Only unwind as much as
necessary for use.
2. If the pipe is repeatedly bent or extended, it will become hard and difficult to manipulate. Avoid bending
or extending the pipe for more than 3 times.
3. Do not bend the pipe excessively, otherwise it will break.
Refer to
Fig. 6.1
MINIMUM BEND RADIUS
When bending connective refrigerant
piping, the minimum bending radius is
a 10cm. Refer to Fig. 6.1
Extend the pipe by unwinding it
TORQUE REQUIREMENTS
1. Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque requirements shown in the table below.
2. You can find the Outer Pipe Diameter stamped (in inches) on the valve set of the con-
denser. Refer to this when finding and applying the torque values in the table below.
3. Note that there may be differences in Torque Wrenches (i.e. automotive torque wrench
versus a HVAC torque wrench) and that a socket style wrench cannot be used here.
Outer Diameter
of Pipe (in/mm)
Stamp
Tightening Torque
(lb·ft / N·m)
Add. Tightening Torque
(lb·ft / N·m )
Ø0.25” (Ø 6.35mm)
1/4”
3/8”
1/2”
5/8”
11 lb•ft (14.91 N·m)
11.8lb•ft (16 N·m)
Ø0.375” (Ø 9.52mm)
18.4 lb•ft (24.95 N·m)
19.18lb•ft (26 N·m)
Ø0.5” (Ø12.7mm)
25.8 lb•ft (34.98 N·m)
26.55lb•ft (36 N·m)
Ø0.63” (Ø16mm) 33.19 lb•ft (45 N·m) 34.67lb•ft (47.01N·m)