PB Heat EC Series User Manual download pdf (Page 12)

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. BURNER WIRING

1. See Section 5 for mounting burner.

2 Install junction box, limit harness, and Heyco

bushing, each located in the trim carton. See Figure

4.1. Mount junction box to the holes in the left side

of jacket with (2) #10 x 1/2" sheet metal screws.

Attach Heyco bushing to 7/8" knockout in front 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. Install burner harness located in the burner carton.

Beckett or Carlin

– EC7022 Harness

(21" conduit)

Riello

– EC7023 Harness (28" conduit)

4. For complete information on servicing and

adjustment of controls, refer to the attached control

specification sheets.

5. See the following Wiring Diagrams:

Figure 4.2 - Steam Boilers with Float LWCO

Figure 4.3 - Steam Boilers with Probe LWCO

Figure 4.4 - Water Boilers

Figure 4.5 - Zoning with Circulators

Figure 4.6 - Zoning with Zone Valves

Figure 4.7 - Partner with Circulator

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: Junction Box Wiring

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PB Heat EC Series User Manual Page 12