Corp. Fan User Manual

20
Installation - Direct Expansion (DX)
Coil Piping (optional)
3. Wire the Solenoid(s)
Wire the supply line solenoid and drain solenoid as
shown on the unit’s wiring diagram in the control
center.
4. Wire the Temperature Sensor
If the evaporative cooler shipped separate from the
unit, the temperature sensor must be wired. The
sensor wire is bundled inside the discharge end of the
evaporative cooler. Wire the sensor wire to terminals
AI2 and AIC on the terminal strip in the unit’s control
center.
NOTE
The Water Wizard™ start-up must be completed for
proper performance.
Water Wizard™ Installation
Sump Drain
To Media
Trap
Roof Line
Supply Line Drain Solenoid
(normally open)
Supply Solenoid
(normally closed)
Manual Supply Valve
Factory
Installed
Field
Installed
Pressure Gauge
1. Locate the Distributor(s) by Removing
the Distributor Access Panel
Distributor Access Panel
IMPORTANT
Guidelines for the installation of direct expansion
cooling coils have been provided to ensure proper
performance and longevity of the coils. These are
general guidelines that may have to be tailored
to meet the specific requirements of any one job.
As always, a qualified party or individual should
perform the installation and maintenance of any coil.
Protective equipment such as safety glasses, steel
toe boots and gloves are recommended during the
installation and maintenance of the coil.
IMPORTANT
All field-brazing and welding should be performed
using high quality materials and an inert gas purge
(such as nitrogen) to reduce oxidation of the internal
surface of the coil.
IMPORTANT
All field-piping must be self-supporting and flexible
enough to allow for the thermal expansion of the coil.
2. Verify Nozzle Placement
Inspect the refrigerant
distributor and verify
that the nozzle is in
place. The nozzle is
generally held in place
by a retaining ring or is
an integral part of
the distributor itself.
Retainer
Ring
Nozzle Distributor
Nozzle Placement
(by others)
(by others)
Installation with Hot Gas Bypass
Thermal
Installation of Water Wizard™,
continued
®
Model IG / IGX Make-Up Air