Burnham Series 5B User Manual

Page 37

COMPLETION OF WIRING – Connect power supply

fused disconnect switch, service switch, primary and

secondary side of gas valve transformer, primary side

of ignition transformer, and remaining controls – see

Fig. 48 & 49 for wire type and connections to be

made. All wiring must be adequately supported and

strain relief provided. All wiring including ground

connections must comply with the requirements of

the authority having jurisdiction and, in the absence

of such, to the National Electrical Code, ANSI NFPA

No. 70-2005, or the Canadian Electrical Code, C22.1,

whichever is applicable.

Thermocouple Control System

INSTALLATION OF PILOT SAFETY SWITCH AND

PILOT PIPING - Using two #10-32 x 2” MS and nuts,

install the L62GB-3C pilot safety switch bracket on

the manifold just to the right of the main burner with

pilot. Install L62GB-3C pilot safety switch on bracket

using two #10-32 x ½” MS. “IN” on pilot safety switch

should be pointed in the direction of the Gas Train to

which the pilot safety switch is to be connected, see

Figure 39.

FIG. 37

PILOT PIPING

EP CONTROL SYSTEM

Using ¼” OD aluminum tubing, connect the pilot

shutoff valve installed in the manual shutoff valve

in the gas train, to the inlet of the RV-12LT regulator

(packed in Gas Train Carton). Regulator should be

above Gas Train and near front of boiler, see Figure 38.

Install 3/8” tee into outlet of regulator (USA boilers)

and, using ¼” OD aluminum tubing, connect outlet of

tee to “IN” connection on pilot safety switch, see Figure

38.

Using ¼” OD aluminum tubing, connect the outlet of

the pilot safety switch to the tubing or fitting connected

to the pilot burner, see Figure 38.

Connect Q309 thermocouple to pilot safety switch.

Connect power supply fused disconnect switch,

service switch, primary and secondary of Gas Valve

Transformer, gas valves, and other controls - see

Figures 50 and 51 for wiring type and connections to

be made. All wiring must be adequately supported and

strain relief provided.

All wiring including ground connections must

comply with the requirements of the authority having

jurisdiction and, in the absence of such to the National

Electrical Code, ANSI NFPA No. 70-2005.

SecTiON iii – iNSTALLATiON iNSTRUcTiONS (continued)

NOTE - PILOT PIPING DUPLICATED ON

15 SECT. AND LARGER BOILERS.