Greenheck Fan HRE-20, 90 unit start-up, Fans Forward Curved Type, Fan Performance Modifications

Models: 45 55 90 HRE-20

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unit start-up

unit start-up

Refer to Parts List section for component locations.

Fans (Forward Curved Type)

The HRE Models contain a forward curved supply fan and a forward curved exhaust fan.. These forward curved fans should be checked for free rotation.. If any binding occurs, check for concealed damage and foreign objects in the fan housing.. Be sure to check the belt drives per the start-up recommendations in the following section..

Fan Performance Modifications

Due to job specification revisions, it may be necessary to adjust or change the sheave or pulley to obtain the desired airflow at the time of installation.. Start-up technician must check blower amperage to ensure that the amperage listed on the motor nameplate is not exceeded.. Amperage to be tested with access doors closed and ductwork installed..

Safety Caution!

When operating conditions of the fan are to be changed (speed, pressure, temperature, etc..), consult Greenheck to determine if the unit can operate safely at the new conditions..

Fan Belt Drives

The fan belt drive components, when supplied by Greenheck, have been carefully selected for the unit’s specific operating condition. Caution: utilizing different components than those supplied could result in unsafe operating conditions which may cause personal injury or failure of the following components: 1) Fan Shaft, 2) Fan Wheel, 3) Bearings, 4) Belt, 5) Motor.. Tighten all fasteners and set screws securely and realign drive pulleys after adjustment.. Check pulleys and belts for proper alignment to avoid unnecessary belt wear, noise, vibration and power loss.. Motor and drive shafts must be parallel and pulleys in line (see below)..

Belt Drive Installation

1.Remove the protective coating from the end of the fan shaft and assure that it is free of nicks and burrs..

2. Check fan and motor shafts for parallel and angular alignment..

3.Slide sheaves on shafts - do not drive sheaves on as this may result in bearing damage..

4.Align fan and motor sheaves with a straight-edge or string and

tighten..

5.Place belts over sheaves.. Do not pry or force belts, as this could result in damage to the cords in the belts..

6..With the fan off, adjust the belt tension by moving the motor base.. (See belt tensioning procedures in the Routine Maintenance section of this manual).. When in operation, the tight side of the belts should be in a straight line from sheave to sheave with a slight bow on the slack side..

WRONG

WRONG

WRONG

CORRECT

Proper alignment of motor and drive shaft.

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Greenheck Fan HRE-20, 90, 55, 45 unit start-up, Fans Forward Curved Type, Fan Performance Modifications, Fan Belt Drives