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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.
WARNING:
Tightening of fittings and valves is the responsibility of the
installing contractor.
WARNING:
With any fluid connection there is risk of leakage. Water
leakage could result in property damage to mission critical equipment. A
water drain connection is required. Units with optional steam generator
humidifiers will require an external potable water supply. Water leakage
can result from improper installation and/or practices.
Electrical Installation
The field power and control wiring should enter the unit cabinet and electrical control box in the areas
as provided on the unit. If these opening do not work as provided, the electrical contractor must
determine a more appropriate area (in accordance with NEC and/or local code) for these opening and
manually make the opening in the sheet metal cabinet and/or electrical control box.
Connect the electrical facility power to the input terminal block or optional disconnect switch. The wiring
diagram for each unit is located on the inside of the electrical panel door.
All field wiring should be done in a professional manner and in accordance with all governing codes.
Before operating unit, double check all wiring connections, including the factory terminals. Factory
connections can vibrate loose during shipment.
Installation of the remote temperature and humidity sensors (Optional) should not be placed where they
will be directly affected by machines other or equipment which gives off heat or moisture. Prevent
exposure to direct sunlight.
Summary of Contents for DA PA-04
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