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Greenheck Fan VSU manual Pipe the Optional Vent Line, Test the System for Leaks

Models: VSU

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4. Pipe the Optional Vent Line

If an optional vent line is located between the safety shutoff valves it must be piped to the outdoors.

warning

Reference the National Fuel Gas Code for additional vent line requirements.

	Vent Line Solenoid
	To Outdoors
	Vent Line
To Burner	From Supply

Safety

Shut-off Valves

Optional Vent Line

5. Test the System for Leaks

Check both the supply lines and the factory piping for leaks. Apply a soap and water solution to all piping and watch for bubbling which indicates a leak.

warning

NEVER test for a gas leak with an open flame.

Note

The factory piping has been checked for leaks, but should be rechecked due to shipping and installation.

Model VSU Make-Up Air 7

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Greenheck Fan VSU manual Pipe the Optional Vent Line, Test the System for Leaks

Contents

If you smell gas 1.Open windows General Safety Information2.Do not touch electrical switches Model VSUHandling Inspection and Maintenance during StorageReceiving UnpackingTroubleshooting Table of ContentsInstallation Installation2. Burner/Blower Section Installation continued3. Install Ductwork 4. Complete InstallationF H K C Dimensional DataUpblast Discharge Elevation View3. Connect the Supply Gas Line Installation of Direct Gas Piping2. Install Additional Regulator if Required 1.Determine the Supply Gas Requirements5. Test the System for Leaks 4. Pipe the Optional Vent Line1. Check the Voltage Start-Up- Blower2. Check the Blower Rotation Pre Start-UpCheck6. Set-upOptional Components 5. Air Volume Measurement & Check2. Check the Pilot Gas Pressure Start-UpDirect Gas1. Check the Supply Gas Pressure 3. Set the Burner Air Pressure DifferentialMaxitrol Series 14 - 7 terminals 4. Set the Maximum Firing RateRegulators and Modulating Valves 5. Set the Minimum Firing Rate6. Set the Unit’s Operating Temperature 7. Flame Signal CheckMaxitrol Series 2.Heat Contact S4 Closed 3.Flame Safeguard FSG SequenceOperation - Electrical 1.Supply Fan Contact S2 ClosedReplace - Reference Maintenance section TroubleshootingBlower Does Not Operate Turn Supply Switch S2 OnWire Heat Switch S4 Heater Does Not OperateTroubleshooting Turn Heat Switch S4 OnHeater Does Not Operate TroubleshootingUncross wires and reconnect If problems remain, consult the factoryProperly ground unit TroubleshootingHeater Does Not Operate Reference Direct Gas Start-Up- Step #7Filters Maintenance - RoutineMotors WheelsHigh Limit Maintenance - FallBearings Start-UpTypical Control Center Layout ReferenceTypical Gas Train Layout Typical setting 60º-70ºF Start-UpChecklistReference Maintenance Log Maintenance Log 457831 Model VSU IOM, Rev. 3, March Warranty