MODEL 950-1007 AND 950-1032 FAN PROVER KITS
Disconnect power supply to all heating, venting equipment and controls before making wiring connections to prevent electrical
shock and equipment damage.
REPLACEMENT OF OLD STYLE FAN PROVER SWITCHES PREVIOUSLY MOUNTED ON ELECTRICAL BOX (SEE DIAG. A)
1. Disconnect power supply to all heating equipment and remove old Fan Prover switch
from HS-3, 4, 5 electrical box.
2. Mount new Fan Prover switch with the diaphragm in a
vertical
orientation within 2 feet
of HS-3, 4, 5 electrical box and within 4 feet of the Power Venter for 1/4” aluminum
tubing connection.
3. Attach conduit mounting plate with whip assembly to HS-3, 4, 5 electrical box with 2
provided screws and connect 2 foot whip to new Fan Prover electrical box by using
provided fittings.
4. Connect the 1/4” aluminum tubing from the Fan Proving Switch to the Power Venter
housing using existing supplied fittings. The factory calibrated sensing tube length and
compression fittings are critical for proper operation of the Fan Proving Switch. If it is
necessary to alter the sensing tube length,
ONLY
trim sensing tube portion that is on
the exterior of the housing.
IMPORTANT
:
DO NOT
trim the sensing tube portion that
will be mounted in the interior of the housing because Fan Prover will not sense the
proper pressure.
Sensing tube assembly with factory calibrated length must be
used for Fan Prover to work properly!
5. Cut female quick connect leads off of wires that were connected to old Fan Prover and
wire nut these wires to the new leads from 2 foot whip connected to new Fan Prover.
Connect leads in new Prover electrical box. Prover leads are not polarity sensitive so
connection order on switch terminals does not matter.
6. Reestablish power and run heating equipment through a couple of heating cycles to verify proper operation.
REPLACEMENT OF SIMILAR STYLE FAN PROVER SWITCHES WITH THEIR OWN ELECTRICAL BOX (SEE DIAGRAM B)
1. Disconnect power supply to all heating equipment and remove Blue and
Yellow leads from old Fan Prover switch and motor lead connections in
old Fan Prover junction box.
2. Mount new Fan Prover in a
vertical
orientation in the same location as
old Prover. You can use the old Fan Prover sensing tubing as long
as it is not damaged or kinked. If damaged, replace with new tubing.
3. Connect the 1/4” aluminum tubing from the Fan Proving Switch to the
Power Venter housing using existing supplied fittings. The factory calib-
rated sensing tube length and compression fittings are critical for proper
operation of the Fan Proving Switch. If it is necessary to alter the sens-
ing tube length,
ONLY
trim sensing tube portion that is on the exterior of
the housing.
IMPORTANT
:
DO NOT
trim the sensing tube portion that
will be mounted in the interior of the housing because Fan Prover will
not sense the proper pressure.
Sensing tube assembly with factory
calibrated length must be used for Fan Prover to work properly!
4. Connect existing conduit from Venter motor and controls to new Fan
Prover.
5. Reconnect Blue and Yellow leads removed in step 1 to the new Fan
Prover switch. Prover switch leads are not polarity sensitive. Reconnect
motor leads removed in step 1 in new Fan Prover Junction box.
6. Reestablish power and run heating equipment through a couple of
heating cycles to verify proper operation.
Rev. 11/02
Copyright © 2002, Tjernlund Products, Inc. All rights reserved.
P/N 8504113
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
FAN PROVER
VENTER
5 FT. LENGTH PROVIDED
S ADDITIONAL CONDUIT,
MINIMUM 14 GAGE)
2 FT. MAXIMUM LENGTH UNLESS ADDITIONAL CONDUIT,
J-BOX AND WIRE ARE ADDED (MINIMUM 14 GAGE)
T. MAXIMUM LENGTH
ALUMINUM SENSING TUBE
SIDE OF SENSING TUBE
DO NOT ALTER THIS
HOUSING WALL
SENSING TUBE
ASSEMBLY
SENSING TUBE
COMPRESSION RING
BRASS ELBOW FITTING
COMPRESSION RING
AND WIRE ARE ADDED
DIAGRAM B
FAN PROVER
VENTER
SIDE OF SENSING TUBE
DO NOT ALTER THIS
HOUSING WALL
SENSING TUBE
ASSEMBLY
SENSING TUBE
COMPRESSION RING
BRASS ELBOW FITTING
COMPRESSION RING
MOUNTED VERTICAL
ELECTRICAL
BOX
CONDUIT
MOUNTING
PLATE
DIAGRAM A
