Burnham K50 manual Sect. and larger boilers, Pilot Piping EE Control System

Note - Pilot Piping duplicated on

15 sect. and larger boilers.

Fig. 34

PILOT PIPING

EE CONTROL SYSTEM

3.INSTALLATION OF BLEED PIPING – Using ¼” OD aluminum tubing, install a bleed line on both diaphragm valves, connect together, see Fig. 25 or 26, and, on USA boilers, run tubing to bleed line protruding from inside base, see Fig. 34. On boilers installed in Canada, run bleed line to outdoors.

4.INSTALLATION OF IGNITION TRANSFORMER AND WIRING OF PILOT – If space permits, mount the ignition transformer on the Jacket above the Gas

Train using four #8 x ½” SMS. Holes will have to be drilled for this purpose. If space does not permit mounting the Ignition Transformer on the Jacket, install the Ignition Transformer on a nearby wall.

Connect the two wires from the Q179C pilot to the

RA890F Protectorelay Sub base as follows:

a.Ground Wire (200ºC) to the “G” terminal

b.Flame detector wire (Honeywell 1298020) to “F” terminal

c.Ignition Cable (Honeywell 1061012) to the

Secondary (High Voltage) terminal of the Ignition Transformer

Run these wires to outside of jacket on underside of manifold and secure in this position with Wire Ties furnished to provide strain relief. Provide adequate support and strain relief for wiring outside jacket.

5.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 & 50 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.

EOP Control System

1.INSTALLATION OF “EOP PANEL” AND WIRING OF PILOT AND PILOT SAFETY SWITCH – Mount the Electronic Control Panel on a wall adjacent to the Gas Train. Connect the two wires from the Q179D pilot to the Terminal Strip in the Electronic Control Panel as follows:

a.Ground Wire (200ºC) to the #12 terminal

b.Flame detector wire (Honeywell 1298020) to #11 terminal

c.Thermocouple Lead to L62 Pilotstat.

Attach the bracket for mounting of the junction box to the lower front corner of the Jacket Upper End Panel using two #10-32 x ½” MS and nuts. Mount junction box to bracket using #8 SMS, see Fig. 25 and 26.

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