Weil-McLain CGS-4E manual 9a Operation sequence, Sequence returns to step

Page 32

GOLD CGs-4E 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 prepurge.

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 mod- ule 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.The CGs-4E timer relay delays high fire for the first 60 seconds of main flame.

6.During main burner operation:

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

7.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.

8.Lower room thermostat setting to stop call for heat. Ther- mostat is satisfied — Pilot and main gas valves are closed

— Inducer operates for 15-second postpurge — Circulator is shut off.

9.Boiler is now in the off cycle.

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

11.Return the thermostat to normal setting.

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

32

Part number 550-110-282/1108

Image 32

Contents GOLDCGs-4E How it works Gold CGs-4EGas-Fired Induced-Draft Water Boiler Contents User InstallerPlease read before proceeding Before locating the boiler, check the following 1a Prepare boiler location codes & checklistInstallations must follow these codes 1b Prepare boiler location clearances When removing boiler from an existing common vent system 1c Prepare boiler location vent systemCGs-4E special vent system Vent systemAreas likely to have contaminants 1d Prepare boiler location contaminationProducts to avoid 1e Prepare boiler location air openings Combustion air requirementsSpecial considerations Sizing air openingsSizing air openings for CGs-4E installations 2a Prepare boiler placement & setup Orifice replacement procedurePlace boiler/crate near position Inspect orifices and burners2b Prepare boiler pressure test Hydrostatic pressure testDrain and remove fittings Prepare boiler for test3a Water piping general information Install an automatic air vent in air vent tapping as shown 3b Water piping single-zone system3c Water piping multiple zones Piping multiple zonesBoiler isolation balancing valves Flow/check valve System or zone circulator Zone valve Drain valveRelief valve Fill valveTemperature gauges Valve adjustment Figures 8 and 9 only3d Piping low temp systems Primary/secondary preferred bypass piping methodBlend temperature gauge Boiler isolation balancing valvesValve adjustment BOILER-bypass piping methodFigures 8 SYSTEM-bypass piping method Boiler 3e Water piping refrigeration systemsPrevent chilled water from entering Combustion air openings Combustion air quality Venting and combustion airVent system Connecting gas supply piping to boiler Gas pipingNatural Gas Propane GasField wiring Electrical installation must comply withWiring connections ThermostatFreeze protection when used 7a Start-up preparationDetermine if water treatment is needed Check for gas leaks7b Start-up operate boiler Inspect system water piping Inspect base insulationFinal check before starting boiler Start the boilerMain burner flame Figure Check burner flamesPilot burner flame Figure If none of the above corrects the problem, refer to 7c Start-up if boiler doesn’t startCheck for Gas not turned on at meter or boiler?Check-out procedure checklist Installation and service certificateBoiler is now in the off cycle 9a Operation sequenceSequence returns to step Operation sequence 9b Operation wiring diagrams Wiring diagram9c Operating instructions CGs-4E Addendum Instruction for Commonwealth of Massachusetts CMR 5.082a 1 throughExemptions The following equipment is exempt from CMR 5.082a1 through10a Service and maintenance schedule 10b Service & maintenance annual start-up With boiler power off, place a few drops of S.A.E Burners, base and inlet air boxCondensate drain system Inducer motor10b Service & maint. annual start-up Boiler relief valve Relief valve, typicalClean between sections with wire flue brush Review with ownerShut down boiler Place newspapers in base of boiler to collect soot11a Troubleshooting procedure Before troubleshootingCheck the following Can result11b Troubleshooting air pressure switch Air pressure switchCheck pressure switch setting Troubleshooting air pressure reading11c Troubleshooting control module Control indicator lights Lockout modesControl indicator lights NON-LOCKOUT modes Troubleshooting the control moduleControl module connections 11d Troubleshooting control module lights Chart 1 Troubleshooting Power light statusChart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Chart 4 Flame & Power lights flashing Does blower motor operate? Item 8 , Verify Sequence of operation, , Weil-McLain part numbers are found in Weil-McLain Boilers 12a Replacement partsSection assembly Base Jacket Trim Controls 12b Replacement parts section assembly Weil-McLain part number12c Replacement parts base Base assemblyDescription Weil-McLain Part number 12d Replacement parts jacket Jacket assemblyBoiler 12e Replacement parts trim Fittings shown are factory-installed on boiler12f Replacement parts controls Propane gas components13a Dimensions Dimensional drawing13b Ratings Tested for 50 psi working pressureEye Irrigate immediately Breathing Fresh air Handling ceramic fiber and fiberglass materialsThis type of respirator is based on