Site Preparation and Installation
Liebert
®
Mini-Mate2
™
24
Refrigerant (R-407C) must be added to field refrigerant piping.
Quick-Connect Fittings
Be especially careful when connecting the quick-connect fittings. Read and understand the following
steps before making the connections.
1. Remove the protector caps and plugs.
2. Carefully wipe the coupling seats and threaded surfaces with a clean cloth.
3. Lubricate the male diaphragm and synthetic rubber seal with refrigerant oil.
4. Thread the coupling halves together by hand to ensure that the threads mate properly.
5. Tighten the coupling body hex nut and union nut with the proper size wrench until the coupling
bodies “bottom out” or until a definite resistance is felt.
6. Using a marker or pen, make a line lengthwise from the coupling union nut to the bulkhead.
7. Tighten the nuts an additional quarter-turn; the misalignment of the lines shows how much the
coupling has been tightened. This final quarter-turn is necessary to ensure that the joint will not
leak. Refer to Table 9 for torque requirements.
Table 11 Refrigerant charge in Liebert pre-charged R-407C line sets
Line Size, in. Length, ft. (m) Charge R-407C, oz (kg)
3/8 Liquid
15 (4.5) 5 (0.14)
30 (9) 10 (0.28)
5/8 Suction
15 (4.5) 5 (0.14)
30 (9) 10 (0.28)
NOTE
When hard piping is used, complete all piping and evacuate the lines before
connecting quick connects.
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