Greenheck VSU - Manuals

Greenheck VSU – Manual in PDF format online.

Manuals:

Manual

Manual Greenheck VSU

Summary

Page 2 - Inspection and Maintenance during Storage; As units are removed; Receiving; Units designed for outdoor applications

2 Model VSU Make-Up Air ® ® ® ® ® Inspection and Maintenance during Storage While in storage, inspect fans once per month. Keep a record of inspection and maintenance performed.If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rota...

Page 3 - Table of Contents; Installation; When ordered with insulation, this unit has a; Concrete Slab Dimensions; Housing Size; Concrete Slab and Unit Footprint

3 Model VSU Make-Up Air ® ® ® ® ® Table of Contents Installation Filter/Stand Section . . . . . . . . . . . . . . . . . . . . . . 3-4Burner/Blower Section . . . . . . . . . . . . . . . . . . . . . 4Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Dimensional Data . . . . . ....

Page 4 - to lift and center the unit; continued; Complete Installation

4 Model VSU Make-Up Air ® ® ® ® ® 2. Burner/Blower Section Use a crane and a spreader bar hooked to the factory lifting lugs (shown below) to lift and center the unit onto the filter stand section. The sections can be caulked together, but it is not needed with the water kickouts provided with this ...

Page 5 - Dimensional Data; Upblast Discharge

5 Model VSU Make-Up Air ® ® ® ® ® Unit Dimensional Data Blower Dimensional Data Unit Weight Housing Size A B C E Filters Blower Size F H J K Blower/Heater* Stand/Filter 40 111 54 95 144 (20) 20x25 220 26 20 68 12 2000 lbs. 700 lbs. All dimensions are shown in inches.* Weights will vary with blower a...

Page 6 - Installation of Direct Gas Piping; Install Additional Regulator if Required; Supply Gas Line

6 Model VSU Make-Up Air ® ® ® ® ® Installation of Direct Gas Piping IMPORTANT All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code ANSI/Z223.1 and any local codes that may apply. In Canada, the equipment shall be installed in accordance with the Instal...

Page 7 - Optional Vent Line; Pipe the Optional Vent Line; WARNING; Test the System for Leaks

7 Model VSU Make-Up Air ® ® ® ® ® Vent Line Solenoid To Burner Vent Line To Outdoors From Supply Safety Shut-off Valves Optional Vent Line 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 installatio...

Page 8 - Check the Voltage; SPECIAL EQUIPMENT REQUIRED; Check for Vibration; Electrical Nameplate; Blower Rotation

8 Model VSU Make-Up Air ® ® ® ® ® Start-Up - Blower 1. Check the Voltage Before starting the unit, compare the supplied voltage, hertz, and phase with the unit and motor’s nameplate information. 2. Check the Blower Rotation Open the blower access door and run the blower momentarily to determine the ...

Page 9 - • Heating Inlet Air Sensor

9 Model VSU Make-Up Air ® ® ® ® ® 6. Set-up Optional Components Adjust the settings on the optional components. See the Control Center Layout in the Reference section for location of optional components. • Heating Inlet Air Sensor Typical setting: 60-70ºF NOTE The most accurate way to measure the ai...

Page 10 - Check the Supply Gas Pressure; Burner and Baffles; Measuring the Pressure Drop; Direct Gas Nameplate

10 Model VSU Make-Up Air ® ® ® ® ® 1. Check the Supply Gas Pressure Check the supply gas pressure and compare it with the unit’s nameplate pressure requirements. Adjust the supply regulator as needed until the supply gas pressure is within the specified range. The direct gas nameplate is located on ...

Page 11 - Set the Maximum Firing Rate; Separate Regulator and Modulating Valves; Regulators and Modulating Valves

11 Model VSU Make-Up Air ® ® ® ® ® 4. Set the Maximum Firing Rate Monitor the unit’s actual temperature rise by placing a thermocouple in the unit’s inlet and a second in the discharge, three duct diameters downstream of the burner.Send the unit to maximum fire by disconnecting and isolating the wir...

Page 12 - Set the Unit’s Operating Temperature; IMPORTANT; Flame Signal Check; DC Voltmeter and; Maxitrol Series 14; Series 14 Discharge Temperature Setting

12 Model VSU Make-Up Air ® ® ® ® ® 6. Set the Unit’s Operating Temperature Set the operating temperature. The operating temperature setting depends on which Maxitrol controller is used. IMPORTANT If the flame signal is not above 1.25 VDC and steady, consult the troubleshooting section. 7. Flame Sign...

Page 13 - Direct Gas Burner Sequence; Supply Fan Contact Closed; Flame Safeguard; Operation - Electrical; Electrical Sequence; energized and closed

13 Model VSU Make-Up Air ® ® ® ® ® Direct Gas Burner Sequence 1. Supply Fan Contact Closed • Power passes to the supply fan and heat switch 2. Heat Contact Closed • Power passes to the heat relay then to the Flame Safeguard 3. Flame Safeguard (FSG) Sequence • Checks for proper airflow• Verifies no f...

Page 14 - Blower Does Not Operate; 4 VAC between; Troubleshooting

14 Model VSU Make-Up Air ® ® ® ® ® 115 VAC between terminals 102 and 101? Check Main Voltage (See Blower Start-Up Step #1) Main Disconnect (DS1) Off (Turn Main Disconnect DS1 On) Primary Fuses Blown (Replace Fuses) Main Transformer Defective (Replace Transformer) 24 VAC between terminals R and X? Ma...

Page 15 - Heater Does Not Operate; Does not attempt to light (No visible spark)

15 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Does not attempt to light (No visible spark) Troubleshooting 24 VAC between terminals W1 and X? Heat Switch (S4) Off (Turn Heat Switch (S4) On) Heat Switch Not Wired (Wire Heat Switch (S4)) 115 VAC between terminals 102 and 101? Primary Fuse...

Page 16 - If problems remain, consult the factory

16 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Attempts to light, but no pilot (visible spark) Troubleshooting Gas pressure between the minimum and maximum shown on the direct gas label? Check inlet gas pressure. (Direct Gas Start-Up Step #1) Air in the gas line? Purge gas line (Verify g...

Page 17 - Visible pilot; (Adjust the flame rod to avoid contact with the burner or the unit)

17 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Visible pilot Troubleshooting Flame signal greater than 1.25 VDC Measure the flame signal when there is a visible pilot Pressure drop across the burner between 0.625 and 0.675 in. wc? Check for proper airflow (Direct Gas Start-Up Step #3) Do...

Page 18 - Maintenance - Routine; Motors; Belt Tension; Drive Alignment; Filters

18 Model VSU Make-Up Air ® ® ® ® ® Maintenance - Routine CAUTION Lock-out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit. V-Belt Drives V-belt drives must be checked on a regular basis for wear, tension, alignment, and dirt accumulat...

Page 19 - Bearings; Fan; High Limit

19 Model VSU Make-Up Air ® ® ® ® ® Bearings The bearings for Greenheck fans are carefully selected to match the maximum load and operating conditions of the specific class, arrangement and fan size. The instructions provided in this manual and those provided by the bearing manufacturer will minimize...

Page 20 - Typical Control Center Layout; Reference; Heating; Typical Gas Train Layout

20 Model VSU Make-Up Air ® ® ® ® ® Typical Control Center Layout Reference 1. Spark Generator 2. Temperature Selector 3. Amplifier 4. 24V Transformer 5. 120V Transformer 6. Transformer Fuses 7. Motor Fuses 8. Heating Inlet Air Switch 9. Flame Safeguard 10. High Limit Switch 11. Disconnect 12. Soft S...

Page 21 - Pre Start-Up Checklist

21 Model VSU Make-Up Air ® ® ® ® ® Start-Up Checklist Unit Model Number _______________________________ (e.g. VSU-220-H40-UB) Unit Serial Number _______________________________ (e.g. 04c99999 or 10111000) Start-Up Date _______________________________ Start-Up Personnel Name _________________________...

Page 22 - Maintenance Log

22 Model VSU Make-Up Air ® ® ® ® ® Maintenance Log Date __________________ Time _____________ AM/PMNotes:___________________________________________________________________________________________________________________________________________________________________________________________________...

Page 24 - Warranty

24 457831 • Model VSU IOM, Rev. 3, March 2009 Copyright 2009 © Greenheck Fan Corporation Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date. Any units or parts which prove defective during the warranty period will be ...