Data Aire gForce Ultra - Auxiliary Chilled Water;Energy Saver Coil Piping; Humidifier Piping; Steam Generator Humidifier; Leak Testing

gForce Ultra IOM
35
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.
Humidifier Piping
Steam Generator Humidifier
The standard humidifier in the systems is a steam generator humidifier type with disposable cylinder.
The humidifier makeup water should be brought to the humidifier through the field connection opening
using 1/4” (6.4 mm) copper tubing. A compression fitting is provided at the humidifier.
A shutoff valve (field provided) should be installed outside the air conditioner to allow disconnection for
service. An in-line water pressure regulator (field provided) and strainer (field provided) should be
installed. Water pressure should be set between 20 and 80 PSI (128 and 552 kPa).
The humidifier has a drain at the bottom which is factory piped to the main condensate drain line. The
dispersion tube also has a drain line. No additional field piping is required.
NOTE: Do not supply steam generating humidifier with softened water.
Also, do not use hot water source.
Leak Testing
WARNING: No installation is complete until the entire system has been
thoroughly checked for leaks. This includes checking the refrigerant
tubing, flare fittings, pressure controls, Schrader fittings and compressor
Rotolock service valves. Check both the field and factory connections.
In addition to the refrigeration system, check all condenser water lines, humidifier water makeup lines,
condensate lines, condensate pumps, chilled water lines, centrifugal pumps and fluid cooler (where
applicable).
When handling or recovering refrigerant it is not permissible to release refrigerant into the atmosphere.
Many leak-test methods recommended in the past are no longer possible. Current standard practices
must be used.
Pressurize the systems circuit(s) to 150 PSIG (1034 kPa) using dry nitrogen with a trace of refrigerant.
Check the entire system for leaks with a suitable leak finder (per local code) including but not limited to
all braze joints, caps, fittings, and flare nuts on both field and factory furnished components. After
completion of leak testing, release test pressure and pull a vacuum on the system.