Emerson PFH020A-L, User Manual

Page: 96 / 117

Equiv.
ft. (m)
PFH_14A PFH_20A PFH_27A
PFH_36A
PFH_37A
3-ton circuit
of 8-ton model
PFH_42A
PFH_41A
PFH_67A
PFH_66A
5-ton circuit
of 8-ton model
Suction Liquid Suction Liquid Suction Liquid Suction Liquid Suction Liquid Suction Liquid
50
(15.2)
5/8" 3/8" 5/8" 3/8" 7/8" 3/8" 7/8" 1/2" 7/8" 1/2" 1-1/8" 1/2"
75
(22.9)
5/8" 3/8" 7/8" 3/8" 7/8" 3/8" 7/8" 1/2" 7/8" 1/2" 1-1/8" 5/8"
100
(30.5)
7/8" 3/8" 7/8" 3/8" 7/8" 1/2" 1-1/8"
2
1/2" 1-1/8" 1/2" 1-1/8" 5/8"
125
(38.1)
7/8" 3/8" 7/8" 1/2" 7/8" 1/2" 1-1/8"
2
1/2" 1-1/8" 1/2" 1-3/8" 5/8"
150
(45.7)
7/8" 3/8" 7/8" 1/2" 7/8" 1/2" 1-1/8"
2
1/2" 1-1/8" 5/8" 1-3/8" 5/8"
1. Suction and liquid line sizing based on < 3 psi pressure drop in each, minimum horizontal suction line velocity > 700FPM (3.6m/s).
2. Suction size should be reduced one pipe size for vertical riser sections to maintain suction line velocity > 1000FPM (5.1m/s) for proper oil return.
Table 2.9 Recommended line sizes, OD Cu
2.5.4 Installation of Piping to Units
NOTE: When using hard piping, complete all piping and evacuate the lines before connecting
quick-connects.
NOTE: Liebert® Challenger™ 5-ton evaporator includes a nitrogen holding charge only. This holding
charge must be evacuated and unit placed in a 500 micron vacuum prior to connecting piping. See
Table 2.12 on page 22 for field charge required.
Use caution when connecting the quick-connect fittings. Read through the following steps before making
the connections.
1. Remove protector caps and plugs.
2. Carefully wipe coupling seats and threaded surfaces with a clean cloth.
3. Lubricate the male diaphragm and synthetic rubber seal with refrigeration grade 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 sized wrench until the
coupling bodies bottom out or until you feel a definite resistance.
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
Piping connection sizes and torque on the next page for torque
requirements.
8. Add liquid refrigerant charge for any field-fabricated piping (refer to Table 2.11 on the next
page) and the 5-ton Liebert Challenger evaporator if used (refer to Evaporator Charge Levels
on page 22).
Vertiv | Liebert PFH Installer/User Guide | 19