Greenheck Fan 470654 manual Reference

Page 33

Reference

Typical Gas Train Layout with Modulating Valve (Pilot Ignition)

Burner Differential		Pilot	Pilot
		Solenoid	Pilot
		Solenoid	Regulator
Pressure Sensor			Regulator
Pressure Sensor		Pilot Gas Pressure
		Pilot Gas Pressure
		Test Port
High Gas	Modulating	Low Gas	Manual Pilot
High Gas	Valve	Pressure Switch	Shut-Off Valve
Pressure Switch		(optional)
(optional)



Burner Gas		Burner Manual		Safety Shut-Off	Regulator
Pressure		Shut-Off Valve		Valves
Test Port

Typical Gas Train Layout with Modulating Regulator (Pilot Ignition)

		Pilot	Pilot
		Solenoid	Pilot
		Solenoid	Regulator
Burner Differential			Regulator
Burner Differential	Pilot Gas Pressure
Pressure Sensor	Test Port
	Modulating/Regulator	Low Gas
	Modulating/Regulator	Pressure Switch	Manual Pilot
High Gas	Valve	(optional)	Shut-Off Valve
Pressure Switch
(optional)

Burner Gas	Burner Manual	Safety Shut-Off
Pressure	Shut-Off Valve	Valves
Test Port

Model VSU Make-Up Air 33

®

Image 33

Contents Model VSU General Safety Information Installation, Operation and Maintenance ManualReceiving Inspection and Maintenance during StorageUnpacking HandlingTable of Contents Subassemblies Product OverviewOpen View Burner, Blower and Control Center SectionBurner Subassembly Control CenterDampers Installation Complete Installation Installation of Optional Service PlatformService Platform Material List Figure C AssemblyInstallation of Electrical Wiring Installation of Direct Gas Piping Install Additional Regulator if RequiredDetermine the Supply Gas Requirements Installation of Building Pressure Control optional Start-Up Checklist Unit Model NumberCheck blower rotation Check for vibration Supply fan RPM Start-Up Blower Start-Up Direct Gas Check the Optional High and Low Gas Pressure SwitchesSet-Up Optional Components Check the Supply Gas PressureSet the Burner Air Pressure Differential Maximum firing rate adjustmentSet the Maximum Firing Rate Measuring the Pressure DropSet the Minimum Firing Rate Regulators and Modulating ValvesSet the Unit’s Operating Temperature Flame Signal Check Pilot IgnitionMaxitrol Series 44 9 Terminals The Maxitrol Operation VAV Units optional Variable Volume OperationSpeed ModulatingOperation Electrical Operation Recirculating Units optionalRecirculation Operation Electrical Sequence Exhaust Fan Contact S1 Closed optional3a. Heat Contact S4 Closed Pilot Ignition Flame Safeguard FSG Sequence3b. Heat Contact S4 Closed Direct Spark Heat Contact ClosedBlower Does Not Operate TroubleshootingMotor Overamps Too Much Airflow Insufficient AirflowExcessive Noise or Vibration Does not attempt to light No visible spark Heater Does Not Operate Pilot IgnitionAttempts to light, but no pilot visible spark Between 0.625 and 0.675 in. WC? Visible pilotHeater Does Not Operate Direct Spark Attempts to light, but no flame Visible spark Belt Drives Maintenance RoutineMotors WheelsMaintenance Fall Reference Typical Gas Train Layout with Direct Spark Ignition Fan Relay allows power to pass to energize motor starter Dirty Filter SwitchHeat Relay allows power to pass to heating controls Control Center LayoutMaintenance Log WarrantyDateTime AM/PM