Greenheck Fan 473501 manual Pre-Start-UpChecklist, Start-UpProcedure, Voltage Imbalance

Pre-Start-Up Checklist

oDisconnect and lock-out all power switches.

oRemove any foreign objects that are located in the energy recovery unit.

oCheck all fasteners, set-screws, and locking collars on the fans, bearings, drives, motor bases and accessories for tightness.

oRotate the fan wheels and energy recovery wheels by hand and ensure no parts are rubbing.

oCheck the fan belt drives for proper alignment and tension.

oFilters can load up with dirt during building construction. Replace any dirty pleated filters and clean the aluminum mesh filters in the intake hood.

oVerify that non-motorized dampers open and close properly.

oCheck the tightness of all factory wiring connections.

oVerify control wire gauge.

oVerify diameter seal settings on the energy recovery wheel.

oVerify proper drain trap installation.

oCheck condensing fans for any damage or misalignment. Spin the blades and make sure they don’t contact any parts and are free turning without any resistance.

oLook over the piping system. Inspect for oil at all tubing connections. Oil typically highlights a leak in the system.

oInspect all coils within the unit. Fins may get damaged in transit or during construction. Carefully straighten fins with a fin comb.

oIf there is an indirect gas-fired furnace in this unit, refer to the maual provided with this unit for Pre- Start-Up information.

oThis unit contains a crankcase heater for each compressor which needs power supplied to it

24 hours prior to start-up. If start-up is scheduled in 24 hours, unlock the disconnect power and energize unit.

SPECIAL TOOLS REQUIRED

•Voltage Meter (with wire probes)

•Amperage Meter

•Pressure Gauges – (refrigerant)

•Tachometer

•Thermometer

•Incline manometer or equivalent

Start-Up Procedure

The unit will be in operational mode during start-up. Use necessary precautions to avoid injury. All data must be collected while the unit is running. In order to measure volts and amps, the control center door must be open, and the unit energized using a crescent wrench to turn the disconnect handle.

oMake sure Pre-Start-Up checklist is complete.

oJumper R to G, R to Y1, and R to Y2 (if applicable) on the control board.

oTurn the disconnect on. After 3 minutes compressors will come on. Make sure all fans and compressors are rotating the correct direction.

oAllow the unit to run until the refrigerant system stabilizes. Approximately 1-2 minutes.

Voltage Imbalance

In a 3-phase system, excessive voltage imbalance between phases will cause motors to overheat and eventually fail. Maximum allowable imbalance is 2%. To determine voltage imbalance, use recorded voltage measurements in this formula.

Key:	V1, V2, V3 = line voltages as measured
	VA (average) = (V1 + V2 + V3) / 3
	VD = Line voltage (V1, V2 or V3) that
	deviates farthest from average (VA)
Formula:	% Voltage Imbalance = [100 x (VA-VD)] /VA

Model ERCH-HP Energy Recovery Unit 13