Instruction/ maintenance manual of the product VSU Greenheck Fan
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1 Model VSU Make-Up Air Unit Installation, Operation and Maintenance Manual Please read and save these instructions. Read car efully before attempting to assemble, install, operate or maintain the product described. Pr otect yourself and others by observing all safety information.
2 Model VSU Make-Up Air ® ® ® ® ® Inspection and Maintenance during Storage While in storage, inspect fans once per month. Keep a recor d of inspection and maintenance performed. If moisture or dirt accumulations ar e found on parts, the source should be located and eliminated.
3 Model VSU Make-Up Air ® ® ® ® ® T able of Contents Installation Filter/Stand Section . . . . . . . . . . . . . . . . . . . . . . 3-4 Burner/Blower Section ..................... 4 Ductwork ................................ 4 D i m e n s i o n a l D a t a .
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 section.
5 Model VSU Make-Up Air ® ® ® ® ® Unit Dimensional Data Blower Dimensional Data Unit W eight 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.
6 Model VSU Make-Up Air ® ® ® ® ® Installation of Dir ect Gas Piping IMPORT ANT All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code ANSI/Z223.
7 Model VSU Make-Up Air ® ® ® ® ® V ent Line Solenoid T o Burner V ent Line T o Outdoors From Supply Safety Shut-off V alves Optional V ent Line W ARNING 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.
8 Model VSU Make-Up Air ® ® ® ® ® Start-Up - Blower 1. Check the V oltage Before starting the unit, compar e 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 rotation.
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 Refer ence section for location of optional components.
10 Model VSU Make-Up Air ® ® ® ® ® 1. Check the Supply Gas Pressur e Check the supply gas pressur e and compare it with the unit’ s nameplate pressur e requir ements. Adjust the supply regulator as needed until the supply gas pressur e is within the specified range.
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 downstr eam of the burner .
12 Model VSU Make-Up Air ® ® ® ® ® 6. Set the Unit’s Operating Temperature Set the operating temperature. The operating temperature setting depends on which Maxitr ol controller is used. IMPORT ANT If the flame signal is not above 1.25 VDC and steady, consult the troubleshooting section.
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.
14 Model VSU Make-Up Air ® ® ® ® ® 115 V AC between terminals 102 and 101? Check Main V oltage (See Blower Start-Up Step #1) Main Disconnect (DS1) Off (T urn Main Disconnect DS1 On) Primary Fuses.
15 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Does not attempt to light (No visible spark) T r oubleshooting 24 V AC between terminals W1 and X? Heat Switch (S4) Off (T urn Heat Swit.
16 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Attempts to light, but no pilot (visible spark) T r oubleshooting Gas pressur e between the minimum and maximum shown on the direct gas label? Check inlet gas pressur e.
17 Model VSU Make-Up Air ® ® ® ® ® Heater Does Not Operate Visible pilot T r oubleshooting Flame signal greater than 1.25 VDC Measure the flame signal when there is a visible pilot Pressur e drop acr oss the burner between 0.
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 accumulation.
19 Model VSU Make-Up Air ® ® ® ® ® Bearings The bearings for Greenheck fans ar e 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 pr ovided by the bearing manufacturer will minimize any bearing problems.
20 Model VSU Make-Up Air ® ® ® ® ® Typical Control Center Layout Refer ence 1. Spark Generator 2. T emperature Selector 3. Amplifier 4. 24V T ransformer 5. 120V T ransformer 6. T ransformer Fuses 7. Motor Fuses 8. Heating Inlet Air Switch 9. Flame Safeguard 10.
21 Model VSU Make-Up Air ® ® ® ® ® Start-Up Checklist Unit Model Number _______________________________ (e.g. VSU-220-H40-UB) Unit Serial Number _______________________________ (e.
22 Model VSU Make-Up Air ® ® ® ® ® Maintenance Log Date __________________ Time _____________ AM/PM Notes:___________________________________________ _____________________________________________.
23 Model VSU Make-Up Air ® ® ® ® ® Maintenance Log Date __________________ Time _____________ AM/PM Notes:___________________________________________ _____________________________________________.
24 457831 • Model VSU IOM, Rev . 3, Mar ch 2009 Copyright 2009 © Greenheck Fan Corporation Greenheck warrants this equipment to be fr ee from defects in material and workmanship for a period of one year fr om the shipment date.
An important point after buying a device Greenheck Fan VSU (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Greenheck Fan VSU yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Greenheck Fan VSU - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Greenheck Fan VSU you will learn all the available features of the product, as well as information on its operation. The information that you get Greenheck Fan VSU will certainly help you make a decision on the purchase.
If you already are a holder of Greenheck Fan VSU, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Greenheck Fan VSU.
However, one of the most important roles played by the user manual is to help in solving problems with Greenheck Fan VSU. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Greenheck Fan VSU along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
