Assessments - 3, GPA: 3
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. RELAY DPST PLUG-IN CABLE G (NOTE 5) THERMOSTAT OR EMCS PROBE LWCO W BK G BK CONNECTOR DAMPER Y GAS VALVE ROBERTSHAW D D TH TR BK W MANUAL RESET O W R (NOTE 8) PILOT PRESSURETROL MANUAL RESET PRESSURETROL UNIVERSAL SPARK IGNITION CONTROL SENSE SPARK MV MV/PV PV ALARM ALARM 24V 24V (GND) BK PILOT SOLENOID R W R MOMENTARY SWITCH R Y IMPULSE RELAY R G Y R Y R R R G R R R G G R W PRE-WIRED PANEL BKBK (NOTE 6) G Y Y CONTROL & PUMP BK CONTROL (NOTE 9) OPERATING G FLOAT LWCO VALVE WIRE NUTS (2) 20 Part Number 550-110-677/0299 MV MV/PV PV ALARM ALARM 24 V 24 V (GND) SENSE SPARK 677-01-p 1 2 3 4 5 6 7 10 8 9 11 12 14 15 15 16 17 18 19 20 21 22 25 25 26 27 23 24 Install strain relief bushings wherever electrical wiring passes through jacket. Vent connections — Connect with ." tubing and run vent line outside building per code requirements. 13 13a Figure 10 Control assembly — steam, pumped return Wiring — steam pumped return VI When using a tankless heater, knockout the opening in the inner panel. Locate the controls to allow room for the tankless heater piping. The tankless heater temperature control (not shown) installs in the heater tapping. Part Number 550-110-677/0299 1 CSD-1 control panel 2 Ignition control Impulse relay and lighted push-button alarm 3 silencing switch 4 Terminal strip 5 Transformer/relay 6 Junction box 7 Damper (optional) 8 Damper connector 9 Dummy plug 10 Damper harness 11 Main gas valve 12 Manual gas valve 13 Pilot gas valve 13a Pilot gas pressure regulator 14 Pilot shutoff valve 15 Leak test valves with plugs 16 Gas supply connection 17 Burner manifold 18 Limit control, auto reset 19 Limit control, manual reset 20 Pressure gauge 21 Siphons 22 Gauge glass & valves 23 Probe LWCO, manual reset 24 Float LWCO/pump control, auto reset 25 Wire harness 26 Pilot spark & sense wires 27 Pilot gas tubing EGH-105 to EGH-125 EGH-105 125EGH-105 125EGH-105 125EGH-105 125EGH-105 Control Supplement CSD-1 control EGH-105 to EGH-125 EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125 Control Supplement VII Final adjustments Before proceeding: 1. Follow EGH Manual instructions for Final Adjustments, Section VII, including filling the boiler and skimming steam boilers. Skimming the boiler as described in Section VII of the EGH Manual requires firing the boiler. Always follow boiler Operating instructions, Figure 11, when starting the boiler. Failure to do so could result in severe personal injury, death or substantial property damage. 2. Inspect base insulation as instructed in Section VII of the EGH Manual. To place boiler in operation: 1. Follow Operating instructions, Figure 11, to start boiler. 2. If boiler starts correctly, proceed with Check-out procedure, Section VIII of this Supplement. 3. If boiler fails to start, check: . Loose connection or blown fuse? o Limit setting below boiler water temperature or steam pressure? o Thermostat below room temperature? . Manual reset device needs to be reset? . Gas not turned on at meter and boiler? o Incoming natural gas pressure less than 5" W. C.? 4. If above fails to eliminate the trouble, refer to Check-out procedure — troubleshooting in this Supplement, Section VIII. Part Number 550-110-677/0299 CSD-1 control system — Natural gas VII Final adjustments — operating instructions Figure 11 Operating instructions Part Number 550-110-677/0299 EGH-105 to EGH-125 EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125EGH-105 to EGH-125 Control Supplement VIII Check-out procedure — operation Always follow boiler Operating instructions, Figure 11, when starting the boiler. Failure to do so could result in severe personal injury, death or substantial property damage. 1. Increase setting of room thermostat (or operating control) to call for heat. 2. Vent damper (if provided) will slowly open. When damper is fully open, the ignition control will open pilot gas valve and start spark. Vent damper must be in open position when appliance main burners are operating. If damper is not in open position, flue products will spill into the building, causing severe personal injury or death. 3. If pilot lights and proves within 15 seconds, the ignition control turns off the spark and opens the main gas valve (dual valves in single body). Main burners ignite. If pilot does not light and prove within 15 seconds, the ignition control shuts off pilot gas and spark and waits 5 minutes. It then will retry. If the second ignition attempt fails, the ignition control will lockout and close the alarm contact of the impulse relay. 4. During main burner operation: • The ignition control monitors pilot flame current. If signal is lost, main valve is closed, spark is activated, and the operating sequence returns to step 3. • If power is interrupted, the control system shuts off pilot and main gas valves and restarts at Step 1 when power is restored. 5. Stop the call for heat (lower thermostat or operating control). • Pilot and main gas valves wi...
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