Greenheck Fan 55, 90 Evaporative Cooling Modules, Evap Module Installation, Evap Module Start-Up

EVAPORATIVE COOLING MODULES

Mount the heat recovery unit level to ensure proper operation and water drainage.. Piping should be of adequate size to provide sufficient supply of water to meet the maximum demand of the evaporative coolers..

EVAP MODULE INSTALLATION

1.After the energy recovery unit is set in place, run the overflow and drain lines to the exterior fittings on the evaporative cooler (drain & overflow connections at unit are 1-inch male pipe thread).. The supply line can be attached at the downstream side of the evaporative cooler.. A manual shut off valve should be mounted in the supply line near the unit for servicing purposes.. Also, a trap should be installed in the drain line to prevent air/sewer gas from being drawn into the unit (refer to Drain and Overflow Connection Locations and Drain Trap sections).. Run bleed line into overflow..

EVAP MODULE START-UP

1.The cooler will be prewired by the factory.. (pumps are 115VAC)..

2.Check to make sure that the pump filter is around the pump inlet..

Indirect Evaporative Cooler

(Exhaust/Scavenger Airstream)

Direct Evaporative Cooler

(Outdoor/Supply Airstream)

3.Turn the water on and allow the sump to fill.. Adjust the float valve to shut-off the water supply when the sump is filled to a 1-inch height..

4.Open the bleed-off valve completely and saturate the media without any airflow through the unit.. A jumper wire is required on the terminal strip to provide power to the evaporative cooler pump (see the wiring diagram for the proper location).. This saturation process will break-in the media and minimize the odors

			associated with the media.. The media’s break-in period should
Side of HRE Unit			be no less than 20 minutes.. When the process is complete,
			remove the jumper wires in the control center..
			Note: Evaporative media may foam for a short period
Drain Line		Evaporative	following the initial start-up.. Leave the bleed-off
			valve fully open until the foaming stops..
Overflow		Cooling
		Media	5.. After the media break-in period, the
Trap		Sump	water flow rate over the media needs to be
			checked.. The pumps should provide enough
	Manual
				water to saturate the media in 1-3
	Shutoff
				minutes.. If adequate flow rate is
Drain	Valve	Roof Curb
				not achieved, adjust via water
Line
			Roof Line
				flow adjustment device found on
				water supply line running to evap

Manual Shutoff Valve	header..
Supply Line

Standard Trap and Supply Line Configuration

6..The water bleed-off rate will now need to be adjusted.. This measurement is 3 to 6 percent of the media flow rate.. The recommended flow rate is 11/2 to 2 GPM

per square foot of media pad top area (see table at right).. Actual water to the unit will be based on the evaporation rate.. A water flow adjustment device is supplied and installed by Greenheck for ease of water flow adjustments.. After the unit has been installed and running for two weeks the unit should be checked for mineral deposits.. If there are deposits, the bleed-off rate needs to be increased.. Some areas of the country have water with greater amounts of dissolved minerals requiring a higher bleed-off rate..

		Media Size	Media Pad
		(w x h x d) (in.)	Top Area
HRE-20	Supply	18 x 36 x 12	1..5 ft2
	Exhaust	18 x 36 x 12	1..5 ft2
HRE-45	Supply	30 x 48 x 12	2..5 ft2
	Exhaust	24 x 48 x 12	2..0 ft2
HRE-55	Supply	36 x 56 x 12	3..0 ft2
	Exhaust	30 x 56 x 12	2..5 ft2
HRE-90	Supply	48 x 69..5 x 12	4..0 ft2
	Exhaust	40 x 69..5 x 12	3..3 ft2

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