41
Add the amount of refrigerant needed for the evaporator & condenser + the line-set then
multiply by .80.
Step 1: Select the model and refrigerant charge for evaporator and condenser.
Weight of Refrigerant in Evap + Condenser
Model Starting Charge (lbs.)
GUAX-022XX NA
GUAX-036XX
NA
GUAX-045XX
NA
GUAX-070XX
25
GUAX-091XX
32.5
GUAX-125XX
37.5
Step 2: Since the majority of refrigerant weight is in liquid form in the liquid line,
refrigerant in the hot gas line and suction line is ignored in the charging calculation.
Calculate the total of the liquid line run, then multiply the equivalent feet of line based on
line size by the correct multiplier to get the refrigerant weight needed for the Line-set.
Weight of Refrigerant in Liquid Line (lbs. /ft.)
Liquid Line OD (inches) Multiplier
1/2”
.067
5/8”
.107
3/4”
.160
7/8”
.223
1 1/8”
.380
Note: Charge Weight calculated at 77F (25C).
Example: If the liquid line of an R-410A system is 150ft of 1-1/8” pipe, then multiply
150 * 0.38 = 57lbs
Step 3: Select model and refrigerant charge of receiver based on condenser size
and circuit type
Weight of Refrigerant per Standard Liquid Receiver (lbs.)
Receiver Type Condenser Circuit type Lbs. of Refrigerant
GHRC 011-039 Single 29
GHRC 053-074
Single 55
GHRC 025-074
Dual 29
GHRC 083-130
Dual 55
GHRC 141-215
Dual 93
GHRC 264-352
Dual 143
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