User guide

37
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 & 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
1. 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tting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.