Weil-McLain 550-110-260/02002 1e Prepare boiler location air openings, CGs combustion air options

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GOLD CGs Gas-Fired Water Boiler

1e Prepare boiler location — air openings

CGs combustion air options

Louver allowance

Using inside air — direct exhaust vent

The free area of openings means the area after

The CGs boiler can use inside air if no contaminants

reduction for any installed louvers or grilles. Be sure

to consider this reduction when sizing the air openings.

are present in the boiler space. If contaminants are likely

 

to be present, install the CGs boiler as a direct vent

 

appliance, using the appropriate vent supplement and

 

the instructions in this manual.

 

Using outside air — direct vent

Combustion air can be ducted directly from outside to the CGs boiler air intake fitting. This method is defined as direct vent (also referred to as sealed combustion). Refer to the appropriate vent supplement and the instructions in this manual. Two options are available: sidewall or vertical direct vent. Each requires a special vent component kit.

Sizing air openings

Air openings provide for ventilation (as well as combustion air) to prevent overheating of the boiler controls and boiler space. Air is also needed for other appliances located in the same space.

Use Figure 3, selecting the appropriate installation conditions. Note that the sizing given in Figure 3 applies only to CGs installations with clearances no smaller than shown in Figure 1, page 7 of this manual. For smaller clearances, regardless of how the air openings are arranged, two openings providing free area of 1 square inch per 1,000 Btuh input of all appliances in the space are required.

Air openings must be sized to handle all appliances and air movers (exhaust fans, etc.) using the air supply.

The sizing given in Figure 3 is based on the National Fuel Gas Code, ANSI Z223.1, allowing adequate air opening for gravity-vented gas appliances (Category I). The CGs boiler is rated Category III or IV (pressurized vent), and has different requirements for combustion and ventilation air, reflected by the special sizing instructions given in Figure 3. The air openings recommended in Figure 3 will allow adequate ventilation and combustion air provided the boiler room is not subjected to negative pressure due to exhaust fans or other mechanical ventilation devices. Refer to the National Fuel Gas Code for dealing with other conditions.

Special considerations

Tight construction

ANSI Z223.1 defines unusually tight construction where:

a.Walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of 1 perm or less with openings gasketed, and . . .

b.Weather-stripping has been added on openable windows and doors, and . . .

c.Caulking or sealants are applied to areas such as joints around windows and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and in other openings.

For buildings with such construction, provide air openings into the building from outside, sized per the appropriate case in Figure 3 if appliances are to use inside air for combustion and ventilation.

Exhaust fans and air movers

The appliance space must never be under a negative pressure unless all appliances are installed as direct vent. Always provide air openings sized not only to the dimensions required for the firing rate of all appliances, but also to handle the air movement rate of the exhaust fans or air movers using air from the building or space.

Motorized air dampers

If the air openings are fitted with motorized dampers, electrically interlock the damper to:

•Prevent the boiler from firing if the damper is not fully open.

•Shut the boiler down should the damper close during boiler operation.

To accomplish this interlock, wire an isolated contact (proving the damper open) in series with the thermostat input to the boiler. The boiler will not start if this contact is open, and will shut down should it open during operation.

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Part number 550-110-260/0200

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Contents Page How it works ① Control modulePage Contents Please read before proceeding InstallerUser 1a Prepare boiler location codes & checklist 1b Prepare boiler location clearances Residential garage installationFlooring and foundation 1c Prepare boiler location vent system Removing from existing vent1d Prepare boiler location contamination Air contamination1e Prepare boiler location air openings CGs combustion air optionsSizing air openings for CGs installations Place boiler/crate near position 2a Prepare boiler placement & setupOrifice replacement procedure Inspect orifices and burnersPrepare boiler for test 2b Prepare boiler pressure testPerform hydrostatic pressure test Fill and pressure test3a Water piping general information Diaphragm-type or bladder-type expansion tank Figure 3b Water piping single-zone systemExpansion tank Closed-type expansion tank Figure3c Water piping multiple zones Converted gravity or steam systemsTypical piping multiple-zone installations Temperature gauges Valve adjustment 3d Water piping low temp systemsPrimary/secondary preferred bypass piping For radiant heating or converted gravity systems3e Water piping low temp systems Boiler-bypass alternate piping 3f Water piping low temp systems 3g Water piping refrigeration system 3f system-bypass alternate pipingPrevent chilled water from entering boiler Venting and combustion air Connecting gas supply piping to boilerGas piping Natural Gas LengthThermostat Field wiringWiring connections Junction Box furnishedDetermine if water treatment is needed Freeze protection when used7a Start-up preparation Check for gas leaks7a Start-up preparation 7b Start-up operate boilerCheck burner flames 7c Start-up if boiler doesn’t startCheck for Check-out procedure checklist Installation and service certificate9a Operation sequence Raise room thermostat to call for heat9b Operation wiring diagrams Schematic wiring diagramService For Your Safety Read Before Operating 9c Operation lighting instructions10a Service and maintenance schedule Service technician10b Service & maintenance annual start-up Condensate drain system Burners, base and inlet air boxBoiler heating surfaces Inducer motor10b Service & maint. annual start-up Boiler relief valve Lever must be operated AT LeastReview with owner 11a Troubleshooting procedure Before troubleshooting11b Troubleshooting air pressure switch Check pressure switch setting11c Troubleshooting control module Control indicator lights lockout modesControl 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 Turn OFF Power to boiler at service switch or breaker Does blower motor operate? Verify Sequence of operation, , 12a Replacement parts Page Page Page Page Page 13a Dimensions Dimensional drawing13b Ratings DOEHandling ceramic fiber and fiberglass materials Removal of Combustion Chamber Lining or Base Panels

550-110-260/02002 specifications

Weil-McLain is a well-known manufacturer of high-quality heating systems and boiler solutions, and the 550-110-260/02002 model is a testament to the company's commitment to innovation and performance. This particular boiler is designed for commercial and residential applications, providing exceptional heating efficiency and reliability.

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In conclusion, the Weil-McLain 550-110-260/02002 is a high-performance boiler that combines durability, efficiency, and advanced technology. With its robust construction, efficient burner system, and user-friendly controls, it stands out as a reliable heating solution for both commercial and residential applications. The commitment to quality and innovation makes this model a preferred choice for those seeking dependable heating systems. Whether for new installations or replacements, the Weil-McLain 550-110-260/02002 delivers exceptional performance and value.
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