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TO ROTATE HOUSING:

VSUB16 & 20 ONLY:

1. Remove bottom (3) nuts that secure inlet support bracket onto the blower inlet collar.

2. Separate the entire inlet support bracket from the base by removing (4) additional nuts.

3. Refasten the (3) nuts to the inlet collar to keep inlet collar factory centered.

ALL VSUB-SERIES BLOWERS:

1. Remove (8) nuts and washers from housing support plate.  NOTE: Leave top housing nut hand tight until ready to rotate housing. 

2. Rotate housing to desired orientation.

3. Refasten blower housing to the housing support bracket.

VSUB16 & 20 ONLY:

1. Remove bottom three nuts and washers from the inlet support bracket.

2. Refasten inlet support bracket to the inlet collar.

3. Tighten remaining nuts on the inlet support bracket so that the housing remains level horizontally.

TO REINSTALL MOTOR/BLOWER IMPELLER ASSEMBLY:

1. Slide motor/impeller assembly back into housing and secure (8) nuts and washers to all studs on motor mount plate.

2. Retighten (2) nuts on the motor mount base.

IMPORTANT:

With power removed to VSUB Blower, rotate blower impeller by hand to verify that it rotates freely. Make necessary 

adjustments if impeller does not rotate freely.

VSUB16 & 20 ONLY:

Readjust inlet support bracket if blower impeller does not rotate freely.

HOW TO OBTAIN SERVICE ASSISTANCE

1.

If you have any questions about your VSUB Blower or if it requires adjustment, repair or routine maintenance, we suggest that
you initially contact your installer, contractor or service agency. 

2.

If you require technical information contact Tjernlund Products, Inc. at 1-800-255-4208.

When contacting Tjernlund Products, Inc., please have the following information available:

1.

Model and Lot # of the VSUB Blower 

2.

Name and address of installer and service agency

3.

Date of original installation and dates any service work was performed

4.

Details of the problem

LIMITED PARTS WARRANTY AND CLAIM PROCEDURE

Tjernlund Products, Inc. offers a two year mechanical warranty on the VSUB Blower.  This warranty covers defects in material and
workmanship.  This warranty does not cover labor, normal maintenance, transportation or installation charges for replacement parts or
any other service calls or repairs.  Products that are tampered with, damaged or defective due to malfunctioning appliances or misap-
plication are not covered under this warranty.  This warranty DOES NOT cover the complete VSUB Blower if it is operative, except for
the defective part.

Tjernlund Products, Inc. will issue credit to your VSUB provider or provide a free part to replace one that becomes defective during the
two year warranty period.  All receipts should include the Lot #  of the VSUB Blower to ensure that the defective component corresponds
with the complete unit.  This will help preclude possible credit refusal.

1.) Determine defective component.  If unable to determine faulty component, contact your VSUB provider or Tjernlund Products 

Technical Customer Service Department at 1-800-255-4208 for troubleshooting assistance.

2.) After the faulty component is determined, return it to your VSUB provider for replacement.  Please include VSUB Lot # compo-

nent was taken from.  The Lot # is located on the VSUB nameplate on the Inducer housing.  Credit or replacement will only be 
issued to your VSUB provider after the defective part has been returned prepaid to Tjernlund.

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Summary of Contents for AUTO-DRAFT VSUB Series

Page 1: ...G EXPLOSION PERSONAL INJURY OR PROPERTY DAMAGE DO NOT DESTROY PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE ON JOB SITE FOR FUTURE REFERENCE MODELS VSUB8 VSUB12 VSUB16 VSUB20 AUTO DRAFT VSUB SERIES V...

Page 2: ...er All models are supplied with the model PSA 1 Fan Proving Switch which will disable the burner s if an exhaust supply malfunction should occur and a FFP 1 fire freeze limit that will shut the VSUB B...

Page 3: ...add 0 60 W C to vent system resistance to accommodate the effects of wind loading Consideration must be given to the temperature of the gases being handled and the elevation above sea level of the in...

Page 4: ...ves the flow of flue gasses or combustion air and is interlocked with all of the heating appliances If installing a VSUB Blower in conjunction with a CPC 2 controller the CPC 2 provides the safety int...

Page 5: ...discharge Make sure the clear ance to combustible surfaces inside and outside the building are followed as discussed in your state and local codes or in their absence the National fuel gas code NFPA...

Page 6: ...t be less than 7 feet above grade when located adjacent to public walk ways At least 3 feet above any forced air inlet located within 10 feet At least 4 feet below 4 feet horizontally from or 1 foot a...

Page 7: ...hen a source conta minant is located within 10 feet 3048mm of an intake opening such opening shall be located a minimum of 2 feet 610mm below the contami nant source IN ADDITION TO THESE CODES THE MAN...

Page 8: ...s as a mechanical exhauster never orient the discharge vertically without installing a rain cap or a vent pipe that alters the discharge to horizontal Rain caps must be raised a distance equal to the...

Page 9: ...ference Make sure there are no sharp bends or kinks in flexible tubing Do not mount the PSA 1 so that is direct ly in the path of the VSUB Blower discharge unit heater or duct discharges Doing so may...

Page 10: ...e Frequency Drives UC1 Universal Control TD 2 TD 3 Pressure Transducer or MAC1E and MAC4E Multiple Appliance Controls are not covered by this manual Please refer to those accessory installation manual...

Page 11: ...onduit All wiring must be in metal conduit best or shielded cable 230 VAC OR 460 VAC 5 VDC BOARD GENERATED POWER DO NOT SUPPLY POWER 115 VAC NOTES FIGURE 8089002 03 23 04 6 5 3 2 1 LEGEND 24 VDC FOR A...

Page 12: ...UC1 INSTRUCTIONS VFD SPEED ADJUST 1 ORANGE BLUE GREEN BLACK BLACK BLACK M1 M2 M3 MGND L1 L2 F2 F1 L3 MS3 MS4 WEATHERPROOF BOX AND WHIP FIGURE 8089004 03 23 04 will be off if power has been removed fr...

Page 13: ...t is being adjusted 6 After the draft has been adjusted for all heaters and with all heaters operating reverify that the draft on all heaters is within the manufacturer s specified range Make any slig...

Page 14: ...ion air to the equipment room When installing the VSUB Blower as a draft inducer it is not necessary to supply any more combustion air than normally required when con ventional venting MAINTENANCE SER...

Page 15: ...5 4208 When contacting Tjernlund Products Inc please have the following information available 1 Model and Lot of the VSUB Blower 2 Name and address of installer and service agency 3 Date of original i...

Page 16: ...al defects due to faulty material or workman ship for a period of 2 years from the date of original purchase or delivery to the original purchaser whichever is earlier Remedies under this warranty are...

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