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12
®
Model MSX Make-Up Air
Installation of Water Wizard
TM
(optional)
Evaporative Cooling with the Water Wizard™
1. Install Normally Closed Supply Line/
Solenoid
Connect the water supply line to the manual supply
valve in the unit. Install the supply solenoid in the
supply line, upstream of the manual supply valve and
below the roof line.
2. Install Normally Open Drain Line/
Solenoid
Connect the drain line to the supply line between the
manual supply valve and the supply solenoid. Install a
drain solenoid in the drain line, below the roof line. A
trap should be installed in the drain line.
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 following instructions are provided for evaporative
coolers equipped with the Water Wizard™ only.
Additional instructions are provided for evaporative
coolers equipped with the auto-drain and fill or
bleed-off.
WARNING
Disconnect and lock-out all power and gas before
performing any maintenance or service to the unit.
Failure to do so could result in serious injury or
death and damage to equipment.
NOTE
Solenoid(s) may be provided by Greenheck (if
ordered) or by others.
CAUTION
Any wiring deviations may result in personal injury
or property damage. Greenheck is not responsible
for any damage to, or failure of the unit caused by
incorrect final wiring.
NOTE
The Water Wizard™ start-up must be completed for
proper performance.
Water Wizard™ Valves
(When provided by Greenheck)
Unit
Model
Assembly
Number
GFC
Part
No.
ASCO
Part No.
Solenoid
Type
De-
Energized
Position
Diameter Qty.
MSX -
H12/H22
MSX - H32
(<9000 cfm)
852370
461262 8210G2
Supply Closed
1/2 inch
(12.7 mm)
1
383086 8210G34
Supply
Line
Drain
Open
1/2 inch
(12.7 mm)
1
MSX - H32
(≥9000 cfm)
MSX-H35,
H38, H42
852371
383088 8210G9
Supply Closed
3/4 inch
(19.05 mm)
1
383086 8210G34
Supply
Line
Drain
Open
1/2 inch
(12.7 mm)
1
Part numbers subject to change.
Water Wizard™ Installation
Supply Line Drain Solenoid
(Normally Open)
Supply Solenoid
(Normally Closed)
Manual Supply
Valve
Pressure
Gauge
To Media
Sump Drain
Roof
Line
Trap
Field
Installed
Factory
Installed