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EGH EGH
EGH Gas-Fired Boiler
EGH EGH
Control Supplement Control Supplement Control Supplement
Control Supplement Control Supplement
EGH-105 to EGH-125 Series 4
‡
Natural gas
CSD-1 control system
‡ For propane boilers, install EGH propane conversion kit in addition to following the
instructions in this Control Supplement.
Part No. 550-110-677/0299
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EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 Control Supplement Please read this page first The following terms are used throughout this Control Supplement to bring attention to the Hazard definitions presence of hazards of various risk levels or to important information concerning the life of the product. Indicates presence of hazards that will cause severe personal injury, death or substantial property damage. Indicates presence of hazards that
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CSD-1 control system — Natural gas Carton guide Table 1 Boiler cartons Verify that the correct cartons are available before beginning assembly. Note that the Base assembly and Trim & controls cartons for CSD-1 are special. The CSD-1 ignition control panel (in Base assembly carton) consists of ignition control module, impulse relay and lighted push-button switch mounted and wired on a panel base. Carton Comments EGH-105 EGH-115 EGH-125 With tankless opening 321-711-120 321-711-130 321-711-140 Sec
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EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 Control Supplement I Installation Place the boiler Refer to the EGH Manual. Read Section I and follow all of its guidelines. Complete the following steps of Section I of the EGH Manual: • Placing the boiler • Installation of optional water heaters, steam boilers only (including pages 13–14) • Hydrostatic pressure test • Installation of flue collector hood • Installation of (burner) drawer assembly and
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CSD-1 control system — Natural gas Install optional vent damper (if supplied) If not installing a vent damper, proceed to next section and actuator wiring openings. Insert wires and secure (Piping connections). strain relief clamps. See Figure 6, 8, or 10 as applies. Once a vent damper has been Keep wiring harnesses clear of all hot operated on an EGH boiler, the boiler surfaces. will no longer operate without a damper installed. WARNING Only dampers listed in the LINE UP KEYWAY WHEN Replacement
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EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 Control Supplement II Piping connections Connect steam (water) piping to the boiler per EGH Manual Section II. Water boilers — make provision for mounting probe low water cutoff in the supply or return piping, above the top of the boiler. The low water cutoff must be between the boiler and any isolation valve(s). III Install boiler controls — water boilers The controls may be mounted on either end of t
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CSD-1 control system — Natural gas III Install boiler controls — steam boilers All water level controls must mount on the left end of the boiler. Failure to do so could result in nuisance shutdowns and possible lockout on the manual reset control due to water level variations from end to end. Substantial property damage could result from freezing due to loss of heat. All controls must mount on left end of the boiler. The correct tappings are available only on the left end section. Install steam
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EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125 Control Supplement V Gas piping Size and connect gas supply piping per EGH Manual, Support gas line securely. Do not Section V . support weight of gas line off of boiler gas train. The gas supply can enter from either the right or left side of the jacket. Be sure the gas train is directed to the Purge air from gas piping and perform gas line and gas correct side. connection leak test per Section V of t
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CSD-1 control system — Natural gas VI Wiring — sequence of operation General The following sequence of operation applies to all wiring diagrams in this Supplement — both water and steam. Call for heat On a call for heat (from thermostat or operating control): 1. Limit control and water level control contacts are assumed closed. 2. Vent damper (if provided) will open. 3. Ignition control checks for signal at pilot. (No signal should be present.) If no signal is sensed (normal condition): a. Pilot
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10 Part Number 550-110-677/0299 LADDER WIRING DIAGRAM EQUIPMENT 120 V.A.C. GROUND VI Wiring — water boilers (NOTE 7) SERVICE CIRCULATOR SWITCH 1K2 Figure 5 R C TRANSFORMER Water boiler wiring — RELAY COIL THERMOSTAT 1K ladder and schematic diagrams G MANUAL RESET MANUAL PROBE LWCO RESET HIGH 1K1 HIGH LIMIT LIMIT Y CABLE TO FUSE DAMPER 3 3 5 5 44 2 2 66 11 2K ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE INJURY OR DEATH. DISCONNECT POWER BEFORE INSTALLING AND/OR SERVICING. SEE NOTE 10 2K4 NOTES: A A
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Part Number 550-110-677/0299 11 SCHEMATIC WIRING DIAGRAM R W MOMENTARY SWITCH D+ R R BK PILOT D SOLENOID VALVE TH TR W R ROBERTSHAW IMPULSE BK W R GAS VALVE RELAY W R UNIVERSAL SPARK IGNITION CONTROL R MV (NOTE 6) G MV/PV MANUAL MANUAL EQUIPMENT G PV HIGH RESET R RESET GROUND LIMIT HIGH LIMIT PROBE LWCO R (NOTE 7) BK BK BK ALARM Y R ALARM Y THERMOSTAT 24V BK R OR EMCS Y G (NOTE 5) BK BK G SERVICE 24V (GND) Y W SWITCH G R G G SENSE G (BY OTHERS) R G H TERMINAL C R BLOCK SPARK BK BK BK A A 1 2 TRA
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12 Part Number 550-110-677/0299 VI Wiring — water boilers 10 7 Figure 6 Control assembly — water boiler (CSD-1 is not availabe for water boilers with tankless heaters.) 25 9 2 19 3 1 18 20 8 21 4 21 24 15 6 15 5 12 11 22 17 13 16 23 13a Install strain relief bushings Vent connections — Connect 14 wherever electrical wiring with ¼" tubing and run vent passes through jacket. line outside building per code requirements. 677-02 MV MV MV/PV MV/PV PV PV ALARM ALARM ALARM ALARM 24 V 24 V 24 V (GND) 24
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Part Number 550-110-677/0299 13 1 CSD-1 control panel 14 Pilot shutoff valve 2 Ignition control 15 Leak test valves with plugs 16 Gas supply connection Impulse relay and lighted push-button alarm 3 silencing switch 17 Burner manifold 5 Transformer/relay 18 Limit control, auto reset 6 Junction box 19 Limit control, manual reset 7 Damper (optional) 20 Pressure/temperature gauge 8 Damper connector 21 Wire harness 9 Dummy plug 22 Pilot spark & sense wires 10 Damper harness 23 Pilot gas tubing 11 Ma
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14 Part Number 550-110-677/0299 LADDER WIRING DIAGRAM EQUIPMENT 120 V.A.C. GROUND VI Wiring — steam (NOTE 7) SERVICE SWITCH gravity return R C TRANSFORMER Figure 7 RELAY COIL THERMOSTAT 1K G Water boiler wiring — OPERATING CONTROL ladder and schematic diagrams MANUAL RESET PROBE LWCO MANUAL RESET 1K1 FLOAT LWCO PRESSURETROL PRESSURETROL Y CABLE TO FUSE DAMPER 3 3 5 5 44 2 2 66 11 2K SEE NOTE 10 2K4 ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE A A 1 2 INJURY OR DEATH. DISCONNECT POWER BEFORE INSTAL
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Part Number 550-110-677/0299 15 SCHEMATIC WIRING DIAGRAM R W MOMENTARY SWITCH R R D BK PILOT D SOLENOID R TR VALVE TH W (NOTE 6) ROBERTSHAW IMPULSE MANUAL RESET MANUAL RESET BK W R W GAS VALVE RELAY PROBE LWCO PRESSURETROL R UNIVERSAL SPARK IGNITION CONTROL PRESSURETROL FLOAT LWCO R BK BK BK BK MV G MV/PV OPERATING EQUIPMENT G PV R CONTROL GROUND (NOTE 9) R (NOTE 7) ALARM Y Y Y R ALARM Y THERMOSTAT 24V BK OR EMCS Y G (NOTE 5) BK BK R G 24V (GND) SERVICE Y W SWITCH G R G G R SENSE (BY OTHERS) G G
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16 Part Number 550-110-677/0299 VI Wiring — steam gravity return 10 7 Figure 8 Control assembly — steam, gravity return 19 9 2 20 18 3 1 21 8 22 25 4 25 When using a tankless heater, 23 knockout the opening in the inner panel. Locate the controls 24 to allow room for the tankless 15 6 heater piping. The tankless 15 5 heater temperature control (not 12 shown) installs in the heater tapping. 11 26 17 13 16 27 13a Vent connections — Connect Install strain relief bushings 14 with ¼" tubing and run v
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Part Number 550-110-677/0299 17 1 CSD-1 control panel 14 Pilot shutoff valve 2 Ignition control 15 Leak test valves with plugs Impulse relay and lighted push-button alarm 3 16 Gas supply connection silencing switch 4 Terminal strip 17 Burner manifold 5 Transformer/relay 18 Limit control, automatic reset 6 Junction box 19 Limit control, manual reset 7 Damper (optional) 20 Pressure gauge 8 Damper connector 21 Siphons 9 Dummy plug 22 Gauge glass & valves 10 Damper harness 23 Probe LWCO, manual res
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18 Part Number 550-110-677/0299 LADDER WIRING DIAGRAM EQUIPMENT 120 V.A.C. GROUND VI Wiring — steam (NOTE 7) SERVICE SWITCH pumped return R C Figure 9 TRANSFORMER RELAY COIL THERMOSTAT 1K Water boiler wiring — G OPERATING CONTROL ladder and schematic diagrams NHC WB FLOAT LWCO MANUAL RESET MANUAL RESET & PUMP PROBE LWCO 1K1 PRESSURETROL PRESSURETROL CONTROL (NOTE 11) Y CABLE TO FUSE DAMPER 3 3 5 5 44 2 2 66 11 2K SEE NOTE 10 ELECTRICAL SHOCK HAZARD, CAN CAUSE SEVERE INJURY OR DEATH. DISCONNECT
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Part Number 550-110-677/0299 19 SCHEMATIC WIRING DIAGRAM R MOMENTARY W SWITCH R R D BK D PILOT SOLENOID R TH TR W (NOTE 6) VALVE BK W R IMPULSE MANUAL RESET MANUAL RESET ROBERTSHAW RELAY W PRESSURETROL PROBE LWCO GAS VALVE R UNIVERSAL SPARK FLOAT LWCO IGNITION CONTROL & PUMP R PRESSURETROL CONTROL MV BK BK BK G MV/PV PV EQUIPMENT G OPERATING R BK CONTROL GROUND R (NOTE 9) (NOTE 7) ALARM Y Y Y R ALARM Y THERMOSTAT 24V BK OR EMCS Y G (NOTE 5) R BK BK G 24V (GND) SERVICE Y W SWITCH G R G G R SENSE
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20 Part Number 550-110-677/0299 VI Wiring — steam pumped return 10 7 Figure 10 Control assembly — steam, pumped return 19 9 2 20 18 3 1 21 8 22 25 4 25 When using a tankless heater, 24 knockout the opening in the 23 inner panel. Locate the controls to allow room for the tankless 15 heater piping. The tankless 6 15 heater temperature control (not 5 12 shown) installs in the heater tapping. 11 26 17 13 16 27 13a Vent connections — Connect Install strain relief bushings 14 with ¼" tubing and run ve
