9a Operation sequence | Weil-McLain 550-110-260/0107 instruction

GOLD CGs Gas-Fired Water Boiler — Boiler Manual

9a Operation — sequence

1.Read appropriate Operating instructions in Section 9c. This information is also located on a label on the inside of the boiler jacket door panel.

2.Raise room thermostat to call for heat.

3.Circulator energizes. If limit circuit is closed, the inducer starts. After pressure switch proves proper airflow, control module initiates a 30-second pre- purge.

4.Control module sparks the pilot and opens pilot valve in main gas valve.

a.If pilot does not light within 15 seconds, pilot valve is closed and spark generator is turned off. Control module initiates a 15-second postpurge, then starts a new cycle.

b.If pilot does light and control module senses flame current, spark generator is turned off and main valve opens.

5.During main burner operation:

a.Control module monitors pilot flame current. If signal is lost, main valve closes, spark gen-

erator activates and sequence returns to step 4.

b.If power is interrupted, control system shuts off pilot and main gas valves and restarts at step 1 when power is restored.

6.In the event the limit control shuts down the boiler — The control module closes the pilot and main gas valves, but keeps the inducer operating for 15-second postpurge.

— The circulator continues to operate.

7.Lower room thermostat setting to stop call for heat. Thermostat is satisfied — Pilot and main gas valves are closed — Inducer operates for 15-second postpurge — Circulator is shut off.

8.Boiler is now in the off cycle.

9.Repeat steps 1 through 6 several times to verify operation.

10.Return the thermostat to normal setting.

11.Set thermostat heat anticipator setting to 0.4 amps, adjusted for gas valve and control current.

Figure 18 Control module sequence of operation — status light indications

Part number 550-110-260/0107

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Weil-McLain 550-110-260/0107 manual 9a Operation sequence

Contents

Gold CGs How it works Gold CGs Gas-Fired Induced-Draft Water Boiler Contents Please read before proceeding InstallerUser Installations must follow these codes 1a Prepare boiler location codes & checklistBefore locating the boiler, check the following 1b Prepare boiler location clearances Vent system When removing boiler from an existing common vent system1c Prepare boiler location vent system CGs special vent system Products to avoid 1d Prepare boiler location contamination Sizing air openings 1e Prepare boiler location air openingsCombustion air options Special considerations Sizing air openings for CGs installations Inspect orifices and burners 2a Prepare boiler placement & setupOrifice replacement procedure Place boiler/crate near position Prepare boiler for test 2b Prepare boiler pressure testHydrostatic pressure test Drain and remove fittings 3a Water piping general information 3b Water piping single-zone system Systems 3c Water piping multiple zonesPiping multiple zones Piping for radiant heating Systems or converted gravity Return water 130F or higher Primary/secondary preferred bypass piping method Temperature gaugesValve adjustment Figures 8 and 9 only 3d Piping low temp systems Primary/secondary piping BOILER-bypass piping method Valve adjustment Figures 8 SYSTEM-bypass piping method Prevent chilled water from entering 3e Water piping refrigeration systems Venting and combustion air Propane Gas Connecting gas supply piping to boilerGas piping Natural Gas Thermostat Field wiringElectrical installation must comply with Wiring connections Verify water chemistry Freeze protection when used7a Start-up preparation Check for gas leaks Start the boiler 7b Start-up operate boilerInspect system water piping Inspect base insulation Final check before starting boiler Pilot burner flame Figure 7c Start-up if boiler doesn’t startCheck burner flames Check for Installation and service certificate Check-out procedure checklist 9a Operation sequence Schematic wiring diagram 9b Operation wiring diagrams Ladder wiring diagram 9c Operating instructions CGs-3 to CGs-6 9c Operating instructions CGs-3 to CGs-6 9c Operating instructions CGs-3 to CGi-6 Verify Proper Operation After Servicing 10a Service and maintenance schedule 10b Service & maintenance annual start-up Oiled-bearing circulators Burners, base and inlet air boxCondensate drain system Inducer motor 10b Service & maint. annual start-up Relief valve, typical Boiler relief valve Review with owner Cleaning boiler heating surfaces Before troubleshooting 11a Troubleshooting procedureCheck the following Troubleshooting air pressure reading 11b Troubleshooting air pressure switchAir pressure switch Check pressure switch setting Troubleshooting the control module 11c Troubleshooting control moduleControl indicator lights Lockout modes Control indicator lights NON-LOCKOUT modes Control module connections Chart 1 Troubleshooting Power light status 11d Troubleshooting control module lights Chart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Chart 4 Flame & Power lights flashing Item 8 , Does blower motor operate? Verify Sequence of operation, , Section assembly Base Jacket Trim Controls 12a Replacement parts Section assembly 12b Replacement parts section assembly Base assembly 12c Replacement parts base Description Weil-McLain Part number Jacket assembly 12d Replacement parts jacket Boiler Model Weil-McLain part number Part number 12e Replacement parts trim Propane gas components 12f Replacement parts controls Dimensional drawing 13a Dimensions DOE 13b Ratings Removal of Combustion Chamber Lining or Base Panels Handling ceramic fiber and fiberglass materials