Notes:
1) The equivalent length of the branching tube is the 0.5m for the model D3T-RC1 and 1m for the model D3T-RC2.
2) Longer connection pipe will reduce the efficiency of the system.
10.5 Refrigerant connections
Models (W)
Liquid side/Gas side
mm Φ6.35/Φ12.7
Φ9.52/Φ15.9
Φ9.52/Φ15.9 Φ9.52/Φ15.9 9.52/15.9 9.52/15.9
(inch) 1/4"/1/2" 3/8"/5/8" 3/8"/5/8" 3/8"/5/8" 3/8"/5/8" 3/8"/5/8"
10.6 Table with the tightening torques of refrigerator fittings
10.7 Refrigerant connections
Comply with the following indications when connecting the cooling pipes:
- Match the ends of the previously flared pipe with those of the connections on the
interior and exterior units.
- Tighten the union by hand and then torque it with the aid of an adequate wrench (it
is advisable to use a fox wedge to prevent tensions from being created on the pipes).
- If necessary must be used an adapter (1) (see the figure in the right side) to enable
correct connection.
Repeat the operation for the second cock.
10.8 Notes on refrigerant pipes preparations
•
Use material and tools that are special for the refrigerant gas R32.
•
When connecting or disconnecting the refrigerator line to or from the unit, use both keys, torque wrench and secure.
•
Refer to the table to check the torque to apply to the fittings (excessive tightening would deform the bolt resulting in
leakages).
•
When connecting the refrigerant fittings with the pipes, tighten the bolts 3 or 4 times with a torque wrench, both on
the indoor unit and on the outdoor unit.
•
Ensure that there are no gas leaks from the fittings.
• Cover the refrigerant fittings again with insulating material.
• Identify the pipes and fittings with symbols or wording.
• Adjust the length of the pipes.
• The diameter of the refrigerator pipes depends on the indoor unit applied. The outdoor units are supplied with
adapters to connect the refrigerant pipes to the connections if they have different diameters.
• The refrigerant is R32.
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