Tjernlund DJ-3, D-3, HD, I, IL, XL Draft Inducer 8504003 Rev A 07/00 - Manual (Page 4)

MODEL PS1505 FAN PROVING SWITCH SAFETY INTERLOCK
The Model PS1505 Fan Proving Switch works on all Tjernlund Draft Inducers to assure adequate draft is present before burner is
allowed to fire. The PS1505 complies with burner safety interlock provisions of National Mechanical Codes.
PURPOSE
The PS1505 Fan Prover has been designed to monitor the pressure within the fan housing only. A motor or wheel failure will
decrease housing pressure and deactivate the pressure switch thus preventing combustion.
The PS1505 Fan Prover is not a safety control designed to ensure proper draft or to indicate chimney failure. It is the responsibility of
the end user to properly maintain the combustion equipment and its chimney or vent. Yearly maintenance and inspection should be
conducted by qualified service personnel. Failure to follow such maintenance and inspection procedures may result in generation of
toxic carbon monoxide gas.
LOCATION
The PS1505 Fan Prover can be mounted on any vertical surface within
five (5) feet of the draft inducer. It must not be mounted on the inducer or
any other surface with a temperature in excess of 190
o F. Similarly, the
temperature of the surrounding air must be less than 190 o F.
RATING
15 Amps non-inductive to 277 Volts AC.
INSTALLATION
CODE REQUIREMENTS
The Draft Inducer must be installed by a qualified installer in accordance with these instructions and all local codes or in their absence
in accordance with the latest editions of The National Fuel Gas Code (NFPA #54), Installation of Fuel Burning Equipment (NFPA 31),
Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances (NFPA 211), The National Electrical Code (NFPA#70) and the
Occupational Safety and Health Act (OSHA) when applicable.
• All appliances must enter the vent system on the inlet side of the Draft Inducer.
• Provision shall be made to interlock the appliance(s) to prevent the flow of gas to the main burners when the draft system is not
performing so as to satisfy the operating requirements of the equipment for safe performance. See “Electrical Wiring” on page 5.
INSTALLER NOTES
1. Verify Draft Inducer selection using burner specifications and Draft Inducer Selection Table on page 2.
2. Make certain that the electrical requirements of the Draft Inducer shown on page 2 are fulfilled by the available power supply.
HIGH TEMPERATURE GASKET MATERIAL MOUNTING (MODELS I, IL, XL ONLY)
1. Peel tape backing off 6 inches on one end.
2. Apply peeled end to the housing flange at a corner of the unit.
3. Press thumb along the top side and peel backing as tape is applied to flange.
4. Insure a tight fit where gasket ends meet.
MOUNTING
The Draft Inducer must not be used in sidewall venting applications. Sidewall venting requires the use of a Tjernlund
Sidewall Power Venter.
1. The Draft Inducer may be mounted on vertical, horizontal or inclined smokepipe. If used on a horizontal smokepipe, mount inducer
on bottom of pipe, not on top, to avoid creating a heat trap in inducer.
2. Cut rectangular slot in pipe and fasten in place with mounting bands provided. NOTE: The models DJ-3 & D-3 do not require bands,
use mounting screws provided.
3. Select a position between draft hood, draft diverter or barometric damper and chimney, locating the inducer as near the chimney as
possible. The motor shaft must be level and horizontal to avoid excessive wear of bearings.
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