Greenheck Fan Part #470655 manual Operation - Electrical Sequence, Without 7-DayTimer

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Operation - Electrical Sequence

Operation - Electrical Sequence

• Without 7-Day Timer

1.Switch (S2) in Summer Mode

•Power passes through N.C. field-supplied fire contact (FSC)

•Power passes through terminal G

•Power passes through N.C. contact on supply starter overload (ST1 OL), which is closed if the supply fan has not overloaded

•Power passes through N.C contact on optional freeze protection timer (RT4), which is closed if the temperature has remained above the set point.

•Power passes to and energizes optional inlet damper (D1), which opens

•Power passes to and energizes fan relay (RF)

•Power passes to N.O. contact on fan relay (RF), which closes once the fan relay (RF) is activated

•Power passes to and energizes supply fan starter

(ST1)

•N.O. contact on supply fan starter (ST1) is energized and closed

•Supply fan (M1) starts

2.Switch (S2) in Winter Mode

•If space temperature is less than the daytime temperature setting, the N.O. contact on the temperature sensor (TS) closes

•Power passes through N.C. field-supplied fire contact (FSC)

•Power passes through terminal W1 and then energizes the space heat relay (RS)

•Power passes through N.O. contact on the space heat relay (RS), which is energized and closed

•Power passes through terminal G

•Power passes through N.C. contact on supply starter overload (ST1 OL), which is closed if the supply fan has not overloaded

•Power passes through N.C. contact on optional freeze protection timer (RT4), which is closed if the temperature has remained above the set point

•Power passes to and energizes optional inlet damper (D1), which opens

•Power passes to and energizes fan relay (RF)

•Power passes to N.O. contact on fan relay (RF), which closes once the fan relay (RF) is activated

•Power passes to and energizes starter relay (ST1)

•N.O. contact on supply fan starter (ST1) is energized and closed

•Supply fan (M1) starts

•Power passes through N.O. contact on fan relay

(RF), which is energized and closed

•Power passes to and energizes the heat relay (RH)

•Power passes through N.O. contact on heat relay

(RH), which is energized and closed

•Power passes to and energizes terminal 5 on the

Flame Safeguard (FSG)

•Power passes through N.C. contact on high temperature limit control (HLC1), which remains closed if the temperature has remained below the HLC1 set point

•Power passes through optional N.C. and N.O. high and low gas pressure contacts (PS4 and PS3), which are both closed if the gas pressure is within the set range

•Power passes to terminal 6 on the Flame Safeguard

(FSG)

•Flame Safeguard (FSG) begins direct gas burner sequence (See Flame Safeguard Sequence)

3.Flame Safeguard (FSG) Sequence

•Verifies proper airflow with airflow switch (PS2)

•Verifies no flame is present at burner

•Initiates 10 second prepurge

•Sends power to open pilot valve (V1) and energizes the spark generator (SG) (clicking of the spark generator may be heard)

•Energizes spark generator for up to 10 seconds to light pilot and confirm flame

•Powers the main gas valve (V2) open

•Shuts down spark generator (SG)

•Continuously monitors the flame and airflow

•Performs self-diagnostic check every four seconds

®

DGX Industrial Space Heating 15

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Contents 3.Extinguish any open flame General Safety Information2.Do not touch electrical switches If you smell gas 1.Open windowsHandling Inspection and Maintenance during StorageReceiving UnpackingTroubleshooting Table of ContentsClearance to Combustibles / Service Clearances Installation3. Seal Wall Opening Installation of Indoor Unit1. Install Hangers 2. Install Unit4. Install Unit Installation of Arrangement DB / HZ1.Install Curb and/or Equipment Supports 2. Install DuctworkAirflow Installation of Diffuser and Remote Panel TSCP1. Install Diffuser 2. Install TSCP4. Wire the Optional Convenience Outlet Installation of Electrical Wiring1.Determine the Size of the Main Power Lines 3.Connect the Main Power3. Connect the Supply Gas Line Installation of Gas Piping2.Install Additional Regulator if Required 1.Determine the Supply Gas RequirementsPre Start-UpCheck Start-Up- Blower4. Pipe the Optional Vent Line 5. Test the System for Leaks4. Motor Check 5.Air Volume Measurement and Check2.Check the Blower Rotation 3. Check for Vibration4a. Set the Burner Air Pressure Differential Start-UpDirect GasStart-UpDirect Gas • 100% Outside Air 1. Check the Supply Gas Pressure6. Set the Maximum Firing Rate Start-UpDirect Gas 50/50 Recirculation4b. Set the Burner Air Pressure Differential 5. Set the Low Fire Time Delay8. Set Daytime Temperature Start-UpDirect Gas continuedRegulators and Modulating Valves 7. Set the Minimum Firing RateFlame Signal Check 11.Flame Signal Check9. Set Nighttime Temperature 10.Program the 7 Day Time Clock3.Flame Safeguard FSG Sequence Without 7-DayTimer1.Switch S2 in Summer Mode 2.Switch S2 in Winter Mode3.Flame Safeguard FSG Sequence Operation - Electrical Sequence With 7-DayTimer1.Switch S2 in Summer Mode 2.Switch S2 in Winter ModeReset TroubleshootingBlower Does Not Operate Turn Supply Switch S2 OnReference Blower Start-Up- Step #2 Motor OverampsTroubleshooting Reference Blower Start-Up- Step #5Reference Filters in the Maintenance section Insufficient AirflowToo Much Airflow TroubleshootingExcessive Noise or Vibration TroubleshootingReference Bearings in the Maintenance section Wire Heat Switch S4 Heater Does Not OperateTroubleshooting Turn Heat Switch S4 OnHeater Does Not Operate TroubleshootingUncross wires and reconnect If problems remain, consult the factoryReference Direct Gas Start-Up- Step #11 TroubleshootingAdjust drives as needed Heater Does Not OperateWheels Maintenance - RoutineSnow Accumulation MotorsFilters BearingsGas Train Maintenance - FallHigh Limit BurnerReference Typical Gas Train Layout 400 – 800 MBHDGX Industrial Space Heating 28 DGX Industrial Space Heating Dirty Filter SwitchTypical Control Center Layout ReferenceReference Start-UpChecklistTypical setting 5 minutes 45ºF Typical setting variesMaintenance Log Maintenance Log Copyright 2012 Greenheck Fan Corporation Warranty
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