Emerson 3000 installation manual Unit refrigerant charge

Split System Models

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.

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 21 for field charge required. If field-supplied refrigerant piping is installed, refrigerant must be added to the system.

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.

Table 21 Unit refrigerant charge

	R407C Charge
Model
	lb (kg)
BF/BU 036E	0.5	(0.2)
BF/BU 035E	0.5	(0.2)
BF/BU 060E	0.8	(0.4)
BF/BU 059E	0.8	(0.4)
MC_40/39A	12.9 (5.8)
MC_65/64A	26.1	(11.8)
PF_042A-_L	12.9 (5.8)
PF_041A-_L	12.9 (5.8)
PF_Z42A-_L	25.8	(11.7)
PF_Z41A-_L	25.8	(11.7)

	R407C Charge
Model
	lb (kg)
PF_042A-_H	25.8	(11.7)
PF_041A-_H	25.8	(11.7)
PF_067A-_L	25.8	(11.7)
PF_066A-_L	25.8	(11.7)
PF_Z67A-_L	50.1	(22.7)
PF_Z66A-_L	50.1	(22.7)
PF_067A-_H	50.1	(22.7)
PF_066A-_H	50.1	(22.7)
MC_44/43W	3.4	(1.5)
MC_69/68W	5.9	(2.7)

Table 22 Line charges - refrigerant per 100 ft. (30 m) of Type “L” copper tube

		R407C
	Liquid Line		Suction Line
O.D.	lb (kg)		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

	3.5-Ton		5-Ton
	036E (035E)		060E (059E)
Equivalent Feet (m)
	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"

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