Installation Guide

Page 26mrcool.com
Refrigerant Piping Connection
Outer Diameter
of Pipe (in/mm)
Tightening Torque
(N·m / lb·ft)
Add. Tightening Torque
(N·m / lb·ft)
Ø0.25” (Ø 6.35mm)
14.91 N·m (11 lb•f t)
16 N·m (11. 8lb•f t)
Ø0.375” (Ø 9.52mm)
24.95 N·m (18.4 lb•ft)
26 N·m (19.18lb•f t)
Ø0.5” (Ø12.7mm)
34.98 N·m (25.8 lb•ft)
36 N·m (26.55lb•ft)
Ø0.63” (Ø16mm) 45 N·m (33.19 lb•f t) 47.01N·m (34.67lb•ft)
≥4in (10cm)Radius
Fig. 6.6
When bending refrigerant piping, the minimum bending radius is 10cm. See Fig 6.6.
MINIMUM BEND RADIUS
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 condenser.
Refer to this when finding and applying the torque values in the table below.
3. Note that there may be diferences in Torque Wrenches (i.e. automotive torque wrench
versus a HVAC torque wrench) and that a socket style wrench cannot be used here.
Step 3: Flare pipe ends continued
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
8. Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and even
flaring.
Step 4: Connect pipes
When connecting refrigerant pipes, be careful not to use excessive torque or to deform the piping in
any way. You should first connect the low-pressure pipe, then the high-pressure pipe.