10
A. GENERAL
All electrical wiring shall be done in accordance with the
National Electrical Code and Local Requirements. Single
pole switches including those of safety controls or
protective devices shall not be wired in a grounded line.
B. WIRING
1. See Section 5 for mounting burner.
2. Knockdown Steam Boilers:
Install junction box, limit harness, and Heyco bushing,
each located in the trim carton. See Figure 4.3. Mount
junction box to the holes in the right side of jacket
with (2) #10 x 1/2" sheet metal screws. Attach Heyco
bushing to 7/8" knockout in left side of junction box.
Connect limit harness to 7/8" knockout on top of
junction box and insert limit harness Molex connector
into Heyco bushing until it snaps firmly in place.
3. For complete information on servicing and
adjustment of controls, refer to the attached control
specification sheets.
4. See the following Wiring Diagrams:
Figure 4.4 - Water Boilers, Beckett 7600A
Limit Control
Figure 4.5 - Water Boilers, Hydrolevel 3250
Limit Control
Figure 4.6 - Steam Boilers with Float LWCO
Figure 4.7 - Steam Boilers with Probe LWCO
4. ELECTRICAL
ELECTRICAL
Improper installation of burner
harness can allow burner to energize
with burner mounting plate open,
creating a severe burn hazard to
boiler maintenance personnel.
WARNING
Figure 4.1: Connecting Ground Wire on Beckett
Limit Control
In accordance with Section 325 (f) (3) of the Energy Policy and Conservation Act, water boilers are equipped with
a feature that saves energy by reducing the boiler water temperature as the heating load decreases. This feature
is equipped with an override which is provided primarily to permit the use of an external energy management
system that serves the same function.
THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that reduces the boiler water temperature as the
heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler system having a total input of 300,000 BTU/hr or greater.
• This boiler is equipped with a tankless coil.
IMPORTANT
