Burnham K50 manual

“THERMOCOUPLE CONTROL SYSTEM”

CANADA ONLY

Fig. 38

PILOT PIPING

THERMOCOUPLE CONTROL SYSTEM

CANADA ONLY

Fig. 39

NOTE - TWO PILOT SAFETY SWITCHES REQUIRED ON 15 SECT. AND LARGER BOILERS.

INSTALLATION OF PILOT SAFETY SWITCH THERMOCOUPLE CONTROL SYSTEM

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.

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 Figure 55 or 56 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.

2.INSTALLATION OF GAS VALVE TRANSFORMER AND COMPLETION OF WIRING - Attach the bracket for mounting of the junction box to the lower front corner of the Jacket

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