The electricity to the boiler shall come from a dedicated breaker in the electric service box. A service
switch should be mounted on the side of the boiler so the burner technician can service the burner and controls.
The electrical wiring should be routed so as not to interfere with normal servicing of the boiler. Wiring done in
the field between devices not attached to boiler shall conform with the temperature limitations for type T wire
(63F/35C) or other specified wire as applicable when installed in accordance to manufacturer's instructions and
wiring diagrams.
If an external electrical source is utilized, the boiler, when installed, must be electrically bonded to
ground in accordance with the requirements of the authority having jurisdiction or , in the absence of such re-
quirements, with the National Electrical Code, ANSI/NFPA 70 or Canadian Electrical Code Part I,CSA C22.1,
Electrical Code.
The L4006A Post Purge Aquastat is installed to ensure that if the boiler exceeds 200° F all power is
disconnected to the burner. The aquastat should be mounted on the supply side of the boiler into the supplied
bullhead tee. To wire the post purge aquastat please refer to the schematics for your specific burner on the fol-
lowing pages.
13
POST PURGE and HIGH LIMIT CONTROL
The post purge control (L4006A) must be mounted on the immersion well in 1
1
/
2
x
1
/
2
x 1
1
/
2
tee supplied with DVH Trim Kit.
4. Wiring
Operating Aquastat
Set at 180° F
30° F Diff
Post Purge
Set at 200° F
15° F Diff
1
1
/
2
x
1
/
2
x 1
1
/
2
Tee
PRV
