Specifications

8
3002443 04.14
4. Electrical Installation
4.1 General
DANGER
Turn off electrical power before servicing. Contact with live electric components can cause shock
or death.
All electrical wiring must be in accordance with requirements of authority having jurisdiction or, in absence of such requirements,
with National Electrical Code NFPA 70 — latest edition. If an external electrical source is utilized, system must be electrically
grounded in accordance with requirements of the authority having jurisdiction or, in the absence of such requirements, with the
National Electrical Code NFPA 70 — latest edition.
The ventilators have a split capacitor motor with infinitely variable speed.
The fan speed control supplied is rated 1x120V/60 Hz and 5 Amps. It has an adjustable low voltage set point of min.
65 V +/- 5 V.
NOTICE
If any of the original wire supplied with the system must be replaced, use similar wire of the same
temperature rating. Otherwise, insulation may melt or degrade, exposing bare wire.
4.2 Wiring Diagram - BESF 146-180
Ventilator and motor specifications can be found on page 5. The ventilator can be equipped with a variable speed motor. Fig. 9
shows a typical wiring diagram for a BESF utilizing a Fan Speed Control.
Fig. 9
24V GAS VALVE
COM
TR
HOT
TH
PROVEN DRAFT
SWITCH
RED WHITE BLACK GREEN
FAN
MOTOR
120/1/60
24 VAC
NOTES:
THE DISCONNECT MEANS AND CIRCUIT PROTECTION ARE TO
BE PROVIDED BY THE INSTALLER OF THIS DEVICE
1
All wiring must be in
flexible or rigid metal
conduit
LEGEND:
24 VAC
120 VAC
WEATHERPROOF BOX
N
L
FAN SPEED
CONTROL
ORANGE