Greenheck Fan 470656 Installation Evaporative Cooler Piping optional, Install the Drain Line

6 in. min.

Drain

Trap

6 in. min.

Installation - Evaporative Cooler Piping (optional)

Evaporative Cooling with Recirculating Pump

Supply Line
	Supply Line Valve
Drain Line Valve	(normally closed)
(normally open)
Drain Line
	Overflow
Trap

Recirculating Evaporative Piping

Important

All supply solenoids, valves and all traps must be below the roofline 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.

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 sewer gas from being drawn

into 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.

Evaporative Cooling with Auto Drain and Fill

Supply Line
Sump Overflow
	VALVE A
Sump Drain	Supply Solenoid
	(normally closed)
VALVE C
Sump Drain Solenoid
(normally open)

VALVE B	Trap
Supply Line Drain Solenoid
(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 solenoid 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 manufacturer)

Assembly	Mfg.	ASCO™	Solenoid	De-Energized
	Part	Part			Diameter	Qty.
Number			Type	Position
	Number	Number
	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.

18 Model IG / IGX Make-Up Air

®