Trane specifications Refrigerant Charge, GSSD Units Coupled with TWE Air Handlers

Refrigerant Charge

GSSD Units Coupled with TWE Air Handlers

The GSSD IS coupled with the TWE- E series. Table 4 may be used to deter- mine the amount of charge necessary for the split unit system without any refrigerant line connecting the two. Table 5 can be used to determine the amount of refrigerant needed for lines. By adding the two weights together, the approximate total system charge can be obtained. For fine tuning the charge, see Units Coupled with Non-

TWE Air Handlers and Fine Tuning in next section.

Table 4: R22 Requirements

GSSD	TWE	Lbs of R22
Model	Model	for both
Number	Number	GSSD & TWE
GSSD024	TWE031E	5.0
GSSD030	TWE031E	5.0
GSSD036	TWE040E	8.25
GSSD042	TWE040E	9.25
GSSD048	TWE065E	9.25
GSSD060	TWE065E	10.125
GSSD072	TWE065E	10.75‘

Table 5: R22 requirement per foot of line

O.D. Tube	Liquid Line	Suction
Size	(oz.)	Line (oz.)
1/4-inch	0.352	N/A
3/8-inch	0.928	N/A
1/2-inch	1.152	0.032
5/8-inch	1.840	0.048
3/4-inch	4.272	0.064
7/8-inch	N/A	0.080
1 1/8-inch	N/A	0.144

Note:

If piping runs exceed 50 feet, the next highest pipe size should be used.

GSSD Units Coupled with Non-TWE Air Handlers and Fine Tuning

1.Place the GSSD system in the cooling mode.

2.Throttle down the water flow with a ball valve until the leaving fluid temperature is 95 degrees F.

3.Charge the system unit until a level of 10 degrees superheat is achieved. To determine super- heat, an accurate suction line temperature needs to be taken along with the suction pressure.

4.The sub-cooling will be approxi- mately 8 degrees to 5 degrees F.

5.Allow system to run 20 minutes for conditions to stabilize before measuring the super- heat.

6.Return water flow to 3 gpm per nominal ton of capacity.

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