Greenheck Fan 470658 MSX Installation Evaporative Cooler Piping optional, Install the Drain Line

Installation Evaporative Cooler Piping (optional)

Evaporative Cooling with Recirculating Pump

Evaporative Cooling with Auto Drain and Fill

Drain Line Valve (Normally Open)

Supply

Line

Supply

Line Valve

(Normally

Closed)

Overflow

	Supply
Sump Overflow	Line
	VALVE A
	Supply Solenoid
	(Normally Closed)

Sump Drain

VALVE C

Sump Drain Solenoid

(Normally Open)

Drain Line

Trap

Recirculating Evaporative Piping

important

All supply solenoids, valves and all traps must be below the roof line or be otherwise protected from freezing.

important

The supply line should be of adequate size and pressure to resupply the amount of water lost due to bleed-off and evaporation. The drain line should be the same size or larger than the supply line.

caution

Provisions must be taken to prevent damage to the evaporative cooling section during freezing conditions. The sump, drain lines and supply lines must be drained prior to freezing conditions or an alternate method must be used to protect the lines and media.

1. Install the Water Supply Line

Supply line opening requirements vary by unit size and arrangement and are field supplied. Connect the water supply line to the float valve through the supply line opening in the evaporative cooling unit. Install a manual shutoff valve in the supply line as shown.

2. Install the Drain Line

Connect an unobstructed drain line to the drain and overflow connections on the evaporative cooler. A manual shut off valve (by others) is required for the evaporative cooler

drain line.

A trap should be
used to prevent	6 in. min.
sewer gas from	6 in. min.
being drawn into
	Drain Trap
the unit.

3. Check/Adjust Water Level

Check the water level in the sump tank. The water level should be above the pump intake and below the overflow. Adjust the float as needed to achieve the proper water level.

VALVE B

Supply Line Drain SolenoidTrap

(Normally Open)

Drain Line

Auto Drain & Fill Evaporative Piping

Important

The supply line should be of adequate size and pressure to resupply the amount of water lost due to bleed-off and evaporation. The drain line should be the same size or larger than the supply line.

caution

All solenoids valves and traps must be installed below the roof to protect the supply water line from freezing. If they cannot be installed below the roof, an alternative method must be used to protect the lines from freezing.

Important

The supply solenoid (Valve A) is NOT the same as the drain solenoids (Valve B and Valve C). Make sure to use the proper solenoid for each location. Check your local code requirements for proper installation of this type of system.

Auto Drain & Flush Valves

(When provided by Greenheck)

Assembly	GFC	ASCO	Solenoid	De-Energized
	Part	Part			Diameter	Qty.
Number	Number	Number	Type	Position
	461262	8210G2	Supply	Closed	1/2 inch	1
					(12.7 mm)
			Supply		1/4 inch
852178	461263	8262G262	Line	Open		1
					(6.35 mm)
			Drain
	461264	8210G35	Sump	Open	3/4 inch	1
			Drain		(19.05 mm)

Part numbers subject to change.

10 Model MSX Make-Up Air ®