8
After verifying system integrity, slowly open service valve to allow
refrigerant to flow through system. Unit is pre--charged for 25’ of
line set. Refer to Tables 4, 5 and 6 to adjust and verify system
charge accordingly.
Table 4 – Liquid Line Charge per Linear Ft.
Liquid Line Charge per Linear Ft.
Liquid Line Size O.D.
R410A oz per ft.
1/4
.25
5/16
.44
3/8
.60
1/2
1.15
5/8
1.95
Table 5 – Refrigerant Charge, Line Sizing & Capacity Multipliers
Refrigerant Charge, Line Sizing and Capacity Multiplier Chart
Model
Factory R410A
Charge (oz)*
Refrigerant Line O.D. Size (Based on Equivalent Line Length)
Suction/Discharge
Vapor Line
25 Ft.
35 Ft.
45 Ft.
50 Ft.
75 Ft.
LIQ.
SUC
LIQ.
SUC
LIQ.
SUC
LIQ.
SUC
LIQ.
SUC
GZ024
80
3/8
3/4
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
3/4
GZ036
86
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
3/4
GZ048
88
3/8
7/8
3/8
7/8
3/8
7/8
3/8
7/8
3/8
7/8
7/8
GZ060
115
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
7/8
GZ072
127
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
3/8
1---1/8
7/8
CAPACITY MULTIPLIER
1.00
.995
.990
.990
.980
Example 1:
Example 2:
Model GZ036 with 45 ft. of equivalent length of 3//8” O.D. Liquid Line.
Total system charge = Factory (45 ft --- 25 ft) X .60 oz/ft.
Total system charge = 86 oz + (20 ft x .60 oz/ft) = 98 oz.
Additional 12 oz of R410A refrigerant required.
Model GZ060 with 10 ft. of equivalent length of 3//8” O.D. Liquid Line.
Total system charge = Factory (10 ft --- 25 ft) X .60 oz/ft.
Total system charge =115 oz --- (15 ft x .60 oz/ft) = 106 oz.
Reduce charge 9 oz of R410A refrigerant is required.
Line Set Limitations: A 20 ft. Differential is the recommended limit without special considerations. For installations with 20---40 ft. Differential, it is recommended to add a
liquid line solenoid and, if the fan coil or furnace is above the GZ unit, add an inverted trap before line drop.
Table 6 – Charge Adjustments When Paired with Air Handlers
Charge Adjustments for GZ condensing section when paired with air handlers (oz)
Unit
CNPV2417
FV4CNF003
FE4CNF003
FB4CMF024
CNPVP3617
FV4CNF003
FE4CNF003
CNPVP4821
FV4CNF005L
FE4CNF00FL
CNPVP6024
FV4CNF006
FE4CNF006
GZ024
---11
---7
---8
---
---
---
---
---
GZ036
---
---
---
0
0
---
---
---
GZ048
---
---
---
---
---
5
5
---
GZ060
---
---
---
---
---
---
---
---13
0
GZ070
---
---
---
---
---
---
---
---13
---6
Example: Model GZ048 condensing section paired with FV4CNF005L air handler with 45ft of equivalent length of 3/8” O.D liquid Line.
Total system charge = factory (charge adjustments for air h (45ft --- 25 ft) x .60 oz/ft.
Total system charge = 88 oz + (5 oz ) + (20ft x .60 oz/ft) = 105 oz.
Additional 17 oz of R410A refrigerant required.