30
2.23. Factory Charge for Water/Glycol Cooled System
Evaporator Model
Total R-410A
Required (lbs.)
Variable Speed
Circuit (lbs.)
Fixed Speed
Circuit (Lbs.)
GUWX-022XX
GUGX-022XX
10
10
N/A
GUWX-036XX
GUGX-036XX
16
16
N/A
GUWX-045XX
GUGX-045XX
18
18
N/A
GUWX-070XX
GUGX-070XX
30
16.5
13.5
GUWX-091XX
GUGX-091XX
36
19.8
16.2
GUWX-125XX
GUGX-125XX
42
23.1
18.9
2.24. Auxiliary Chilled Water/Energy Saver Coil Piping
Units with Auxiliary Chilled Water-cooling coil require a separate source of chilled water. These
chilled water connection sizes will be equal to the condenser water connection sizes shown in
the Fluid Cooler Operation, Installation and Maintenance manual. Units with an Energy Saver
cooling coil have shared piping with the condenser supply and return therefore do not require a
separate water source.
All chilled water pipes have a cap installed on the end of the pipe for factory pressure testing of
the system. These caps need to be removed before installing the water piping to the unit. Use a
tube cutter for smaller pipes and reciprocating saw with a metal cutting blade for larger pipes or
if there is a clearance problem. All connections need to be cleaned before connections are
brazed together.
2.25. Condensate Drain Piping
Every indoor unit has a
3/4” (19 mm) copper stub provided for condensate removal. A union
(field pro- vided) is recommended at the field connection which will permit easy disconnection
from the unit for cleaning.
A trap should be built into the drain line to prevent air from backing up into the unit. Drain lines
should be pitched downward
not less than 1/4” (6.35 mm) for each ten (10) feet (3.1 m) of
horizontal run. Do not reduce the size of the drain line.
Some applications have no convenient means of allowing a gravity drain. When required, an
optional condensate pump can be used. Condensate pumps are either factory mounted or
shipped loose. Fac- tory mounted condensate pumps do not require a separate power source.
Condensate pumps shipped loose (or field provided) typically require a dedicated 110-volt power
source. Field pipe connections must be made to the pump discharge connection. A check valve
must be installed to prevent short cycling. See condensate pump electrical requirements in
Section 3.9.
Do not expose drain line to freezing temperatures. Drain line may contain boiling water therefore
use copper or other suitable material. Drain line must comply with local building codes. It is