Tjernlund 950-0452 PAI-1,2 Prover Kit 8504044 Rev. 1 04/97 - Manual

PAI-G/GT/O SERIES REPLACEMENT FAN PROVER SWITCH INSTALLATION INSTRUCTIONS
READ INSTRUCTIONS CAREFULLY PRIOR TO INSTALLATION
1. Disconnect electrical power before making wiring connections to prevent electrical shock and equipment damage.
2. All wiring must comply with applicable codes and ordinances.
3. When wiring is completed, check all components by running system through its entire heating cycle.
IN-FORCERS with date codes prior to “9705”
For the steps following below, refer to diagram A.
1. Remove (10) screws holding IN-FORCER housing together. If IN-FORCER is still mounted, support housing assembly
to avoid damage to internal wiring connections or components.
2. Remove 11/32 nut on inside of IN-FORCER junction box which is connected to motor stud.
3. Carefully remove BLUE & YELLOW leads from Proving Switch. Loosen and remove (2) nuts which hold Fan Proving
Switch assembly to damper assembly. Push Fan Proving Switch assembly through damper shelf and remove.
4. Remove new Proving Switch from box. The Proving Switch used in this application has studs requiring (2) nuts to
fasten to damper housing. Bend of actuating wire should be pointed away from damper as shown.
5. Push female leads on new Proving Switch. Wire leads on switch should point in direction they enter damper cavity.
The BLUE wire from IN-FORCER junction box should be connected to the COM terminal of Proving Switch and the
YELLOW wire should be connected to N/O terminal of Proving Switch.
6. Reinstall PAI Proving Switch assembly to damper assembly with (2) nuts. Before reassembling IN-FORCER, check
Proving Switch for free movement. Proper operation of Proving Switch can be verified by a “click” sound as switch
opens and closes.
7. Follow reverse procedure in steps 1 & 2 to reassemble IN-FORCER. Verify proper heater and IN-FORCER operation.
OWNERS INSTRUCTIONS
THESE INSTRUCTIONS MUST
REMAIN WITH EQUIPMENT
DO NOT DESTROY
ALWAYS FOLLOW HEATER MANU-
FACTURER’S INSTRUCTIONS FOR
PROPER OPERATION OF HEATER
AND RE-LIGHTING OF PILOT
DIAGRAM A
TJERNLUND PRODUCTS, INC.
1601 Ninth Street • White Bear Lake, MN 55110-6794
PHONE (800) 255-4208 • (651) 426-2993 • FAX (651) 426-9547
Visit our web site • www.tjernlund.com