Weil-McLain 550-110-710/0107 7a Start-up preparation, Check for gas leaks, Verify water chemistry

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GOLD CGi Gas-Fired Water Boiler — Boiler Manual

7a Start-up — preparation

Check for gas leaks

Before starting the boiler, and dur- ing initial operation, smell near the floor and around the boiler for gas odorant or any unusual odor. Do not proceed with start-up if there is any indication of a gas leak. Repair any leak at once.

Propane boilers only — Your pro-

pane supplier mixes an odorant with the propane to make its presence detectable. In some instances, the odorant can fade and the gas may no longer have an odor.

•Propane gas can accumulate at floor level. Smell near the floor for the gas odorant or any unusual odor. If you suspect a leak, do not attempt to light the pilot.

•Use caution when attempting to light the propane pilot. This should be done by a qualified service technician, particularly if pilot outages are common.

•Periodically check the odorant level of your gas.

•Inspect boiler and system at least yearly to make sure all gas piping is leak-tight.

•Consult your propane supplier regarding installation of a gas leak detector. There are some products on the market intended for this purpose. Your supplier may be able to suggest an appro- priate device.

Determine if water treatment is needed

Do not use petroleum-based cleaning or sealing

compounds in boiler system. Severe damage to boiler will occur, resulting in substantial property damage.

Eliminate all system leaks. Continual fresh makeup water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron, and causing section failure.

Verify water chemistry

Consult local water treatment companies for unusually hard water areas (above 7 grains hardness) or low pH water conditions (below 7.0). Boiler water pH of 7.0 to 8.5 is recommended.

Freeze protection (when used)

Use antifreeze made especially for hydronic systems. Inhibited propylene glycol is recommended.

Do not use ethylene glycol, automotive or undiluted antifreeze. Severe personal injury or death can result.

1.Determine antifreeze quantity according to system water content. Boiler water content is listed on page 67. Remember to include expan- sion tank water content.

2.Follow antifreeze manufacturer’s instructions.

3.A 50% solution of propylene glycol/water provides maximum protec- tion to about -30°F.

4.Local codes may require back flow preventer or actual disconnect from city water supply.

5.When using antifreeze in a system with automatic fill, install a water meter to monitor water makeup. Glycol will leak before the water begins to leak, causing glycol level to drop. Added water will dilute the antifreeze, reducing the freeze protection level.

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Part Number 550-110-710/0107

 

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Contents Gold CGi How it works Gold CGi Gas-Fired Induced-Draft Water Boiler Contents Please 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 Chimney or vent require- ments When removing boiler from an existing common vent system1c Prepare boiler location vent system 1d Prepare boiler location air contamination Products to avoid1e Prepare boiler location air openings Air openings must be providedAir opening options Two openings Air supply from inside the buildingExhaust fans and air movers Motorized air dampersSingle air opening option Exception for large spaces2a 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 Venting general information Venting chimney draft ventingCGi venting methods Chimney draft or Direct exhaust Chimney draft venting3c Venting Direct exhaust components Obtain vent system components3d Venting direct exhaust vent starter Vent StaR-34 Vent starter3e Venting direct exhaust termination Vent termination minimum clearancesSidewall venting See Figures 14 3f Venting direct exhaust installationVertical venting See . Follow vent Using any termination other than one of those shown 4a Water piping general information Closed-type expansion tank 4b Water piping single-zone systemDiaphragm-type or bladder- type expansion tank Figure 4c Water piping multiple zones Piping multiple zonesZoning with circulators 4d Piping low temperature systems Temperature gaugesValve adjustment Primary/secondary preferred bypass piping methodPrimary/secondary piping Valve adjustment BOILER-bypass piping methodBoiler-bypass piping Zoning with SYSTEM-bypass piping method 4e Water piping refrigeration system Prevent chilled water from entering boilerConnecting gas supply piping to boiler Gas pipingNatural Gas Propane GasField wiring Electrical installation must comply withWiring connections ThermostatFreeze protection when used 7a Start-up preparationCheck for gas leaks Determine if water treatment is neededDo not use petroleum-based cleaning or sealing compounds Fill the system with waterInspect system water piping Inspect base insulationCheck system and boiler 7b Start-up operate boilerStart the boiler 7c Start-up if boiler doesn’t start Check burner flamesCheck for Pilot burner flame FigureCheck-out procedure checklist Thermostats9a Operation sequence During main burner operation9b Operation wiring diagrams Schematic wiring diagramLadder wiring diagram 9c Operating instructions CGi-25 to CGi-6 9c Operating instructions CGi-25 to CGi-6 9c Operating instructions CGi-25 to CGi-8 10a Service and maintenance schedule Verify Proper Operation After Servicing10b Service and maintenance annual start-up 10b Service & maintenance annual start-up Burners and baseCondensate drain system Inducer motorGas piping Cold fill and operating pressuresAir vents and air elimination Limit controls and cutoffsReview the User’s Information Manual with the owner Review with ownerBoiler relief valve 11a Troubleshooting procedure 11b Troubleshooting componentsBefore troubleshooting Air pressure switchControl indicator lights Troubleshooting the control moduleControl indicator lights Lockout modes Control moduleControl module connections 11c Troubleshooting control module lights Chart Light flashingRemove 120 VAC in plug , Item 3, page 50 on control module VAC in plugChart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Chart 4 Flame & Power lights flashing Usually indicates flame sensed when it shouldnt be thereDoes blower motor operate? Item 8 , Verify Sequence Operation, FigureControls Repair Parts Lists 12a Replacement partsSection assembly Base Jacket Trim Controls 12b Replacement parts section assembly Section assembly12c Replacement parts base Base assemblyDescription Weil-McLain Part number 12d Replacement parts jacket Jacket assemblyBoiler Model Weil-McLain part number BoilerModel Weil-McLain part number 12e Replacement parts trim Fittings shown are included with boiler12f Replacement parts controls Propane gas components13a Dimensions Dimensional drawing13b Ratings Handling ceramic fiber and fiberglass materials Removal of Combustion Chamber Lining or Base Panels
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