Connect wiring — general information
(continued)
Figure 15
Blocked vent shutoff switch installation
Blocked vent shutoff switch
In Canada, a blocked vent shutoff switch
kit must be installed (see parts list
page 38). See Figure 15.
Electric shock hazard. Turn off electrical
power supply at service entrance panel
before making any electrical connections
to avoid possible electric shock hazard.
Failure to do so can cause severe personal
injury or death.
After installing BVSS switch, proceed as follows
1. Disconnect power.
2. Install Spill Switch (BVSS) Wiring Harness (P/N
591-391-942) as follows:
a. Remove cover from BVSS Box.
b. Install straight fitting end of the harness on the
BVSS Box. Install elbow (90º) end fitting on the
Boiler Junction Box (see Figure 15).
c. Install both the fork ends to the screw terminals
on the BVSS Switch as per the wiring diagram,
(see Figure 17).
d. Replace BVSS box cover.
To wire blocked vent safety switch, see:
Figure 16, page 26 for float-type LWCO
Figure 19, page 28 for probe-type LWCO
Part number 550-141-829/1211
25
GOLD
SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 3 —
Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
