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Refrigerant charge requirements: Total refrigerant charge will be required only if units are evacuated
during installation or maintenance. Total refrigerant charge = evaporator + lines + condensing unit.
Once all piping is complete, check for leaks and dehydrate the field piping as follows:
1. Pressurize the field piping to 150 PSIG (1034 kPa) using dry nitrogen with a trace of refrigerant.
Check system for leaks with a suitable leak detector.
2. After completion of leak testing, release the test pressure (per local code) and pull a deep vacuum
on the field piping with a suitable pump.
3. After 15 minutes, check the pressure readings and, if they have not changed, break vacuum with
dry nitrogen. Pull a second vacuum to 250 microns or less. Recheck the pressure after 15 minutes.
NOTE
All condensing units and 3-ton evaporator units are fully charged with refrigerant. All 5 ton
evaporator units include a nitrogen holding charge only. See Table 2 1 for field charge
required. If field-supplied refrigerant piping is installed, refrigerant must be added to the
system.
Table 21 Unit refrigerant charge
Model
R407C Charge
Model
R407C Charge
lb (kg) lb (kg)
BF/BU 036E 0.5 (0.2) PF_042A-_H 25.8 (11.7)
BF/BU 035E 0.5 (0.2) PF_041A-_H 25.8 (11.7)
BF/BU 060E 0.8 (0.4) PF_067A-_L 25.8 (11.7)
BF/BU 059E 0.8 (0.4) PF_066A-_L 25.8 (11.7)
MC_40/39A 12.9 (5.8) PF_Z67A-_L 50.1 (22.7)
MC_65/64A 26.1 (11.8) PF_Z66A-_L 50.1 (22.7)
PF_042A-_L 12.9 (5.8) PF_067A-_H 50.1 (22.7)
PF_041A-_L 12.9 (5.8) PF_066A-_H 50.1 (22.7)
PF_Z42A-_L 25.8 (11.7) MC_44/43W 3.4 (1.5)
PF_Z41A-_L 25.8 (11.7) MC_69/68W 5.9 (2.7)
Table 22 Line charges - refrigerant per 100 ft. (30 m) of Type “L” copper tube
O.D.
R407C
Liquid Line
lb (kg)
Suction Line
lb (kg)
1/2" 7.3 (3.3) -
5/8" 11.7 (5.3) 0.4 (0.2)
7/8" 24.4 (11.1) 1.0 (0.4)
1-1/8" 41.6 (18.9) 1.7 (0.7)
1-3/8" 63.3 (28.7) 2.7 (1.1)
Table 23 Recommended refrigerant lines (R407C) sizes OD copper
Equivalent Feet (m)
3.5-Ton
036E (035E)
5-Ton
060E (059E)
Suction Liquid Suction Liquid
0-50 (0-15) 7/8" 1/2" 1-1/8" 1/2"
51-100 (16-30) 1-1/8" 1/2" 1-1/8" 5/8"
101-150 (31-45) 1-1/8" 5/8" 1-3/8" 5/8"