Greenheck Fan Part #470655 manual Operation - Electrical Sequence With 7-DayTimer

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Operation - Electrical Sequence With 7-Day Timer

Operation - Electrical Sequence With 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 (TS1) closes and power passes to the timer (TC1). If the timer (TC1) is on, power passes through N.C. field-supplied fire contact (FSC). If the timer (TC1) is off, but the space temperature is less than the nighttime temperature setting, the N.O. contact on the temperature sensor (TS2) closes and 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 supply fan starter

(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

16 DGX Industrial Space Heating

®

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Contents General Safety Information 2.Do not touch electrical switchesIf you smell gas 1.Open windows 3.Extinguish any open flameInspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Clearance to Combustibles / Service ClearancesInstallation TroubleshootingInstallation of Indoor Unit 1. Install Hangers2. Install Unit 3. Seal Wall OpeningInstallation of Arrangement DB / HZ 1.Install Curb and/or Equipment Supports2. Install Ductwork 4. Install UnitInstallation of Diffuser and Remote Panel TSCP 1. Install Diffuser2. Install TSCP AirflowInstallation of Electrical Wiring 1.Determine the Size of the Main Power Lines3.Connect the Main Power 4. Wire the Optional Convenience OutletInstallation of Gas Piping 2.Install Additional Regulator if Required1.Determine the Supply Gas Requirements 3. Connect the Supply Gas LineStart-Up- Blower 4. Pipe the Optional Vent Line5. Test the System for Leaks Pre Start-UpCheck5.Air Volume Measurement and Check 2.Check the Blower Rotation3. Check for Vibration 4. Motor CheckStart-UpDirect Gas Start-UpDirect Gas • 100% Outside Air1. Check the Supply Gas Pressure 4a. Set the Burner Air Pressure DifferentialStart-UpDirect Gas 50/50 Recirculation 4b. Set the Burner Air Pressure Differential5. Set the Low Fire Time Delay 6. Set the Maximum Firing RateStart-UpDirect Gas continued Regulators and Modulating Valves7. Set the Minimum Firing Rate 8. Set Daytime Temperature11.Flame Signal Check 9. Set Nighttime Temperature10.Program the 7 Day Time Clock Flame Signal CheckWithout 7-DayTimer 1.Switch S2 in Summer Mode2.Switch S2 in Winter Mode 3.Flame Safeguard FSG SequenceOperation - Electrical Sequence With 7-DayTimer 1.Switch S2 in Summer Mode2.Switch S2 in Winter Mode 3.Flame Safeguard FSG SequenceTroubleshooting Blower Does Not OperateTurn Supply Switch S2 On ResetMotor Overamps TroubleshootingReference Blower Start-Up- Step #5 Reference Blower Start-Up- Step #2Insufficient Airflow Too Much AirflowTroubleshooting Reference Filters in the Maintenance sectionTroubleshooting Excessive Noise or VibrationReference Bearings in the Maintenance section Heater Does Not Operate TroubleshootingTurn Heat Switch S4 On Wire Heat Switch S4Troubleshooting Uncross wires and reconnectIf problems remain, consult the factory Heater Does Not OperateTroubleshooting Adjust drives as neededHeater Does Not Operate Reference Direct Gas Start-Up- Step #11Maintenance - Routine Snow AccumulationMotors WheelsBearings FiltersMaintenance - Fall High LimitBurner Gas TrainTypical Gas Train Layout 400 – 800 MBH ReferenceDGX Industrial Space Heating Dirty Filter Switch Typical Control Center LayoutReference 28 DGX Industrial Space HeatingStart-UpChecklist Typical setting 5 minutes 45ºFTypical setting varies ReferenceMaintenance Log Maintenance Log Warranty Copyright 2012 Greenheck Fan Corporation
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