Tjernlund HS-3C Canadian 8504002 Rev 2 09/97 - Manual (Page 6)

5
FAN PROVING SWITCH INSTALLATION
NOTE: It is important that the electrical box is mounted with
the Fan Proving Switch in a vertical position.
1. Mount supplied electrical box to a flat surface within 2 feet
of the Power Venter with Proving Switch in a vertical
position.
2. Connect the 1/4” aluminum tubing from the Fan Proving
Switch to the Power Venter housing using 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. DO NOT trim the sensing tube portion that will be
mounted in the interior of the housing. No attempts should
be made to substitute the specified materials. See Fan
Proving Switch installation diagram.
WIRING
All wiring from the Power Venter to the appliance must be in compliance with the local codes or in their absence, The Canadian
Electrical Code (CSA Std C22.1).
All wiring from the Power Venter to the appliance must be appropriate class 1 wiring as follows: Installed in rigid metal conduit, inter-
mediate metal conduit, rigid non-metallic conduit, electrical metallic tubing, Type MI Cable, MC cable or be otherwise suitably protected
from physical damage.
ELECTRICAL SPECIFICATIONS
As viewed from the opposite end of the shaft, the motor should rotate clockwise.
NOTE: