Weil-McLain 550-110-260/02002 manual 3a Water piping general information

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GOLD CGs Gas-Fired Water Boiler

3a Water piping — general information

General piping information

If installation is to comply with ASME or Canadian requirements, an additional high temperature limit is needed. Install control in supply piping between boiler and isolation valve. Set second control to minimum 20 °F above setpoint of first control. Maximum allowable setpoint is 240 °F. See section 9b, page 32 for wiring.

A low water cutoff device is required when boiler is installed above radiation level or by certain state or local codes or insurance companies. Use low water cutoff designed for water installations. Electrode probe- type is recommended. Purchase and install in tee in supply piping above boiler.

Use backflow check valve in cold water supply as required by local codes.

Circulator

The circulator is shipped loose (wiring pre-attached to boiler) to allow you to locate it either in the return or supply piping, as desired. See page 3 for a typical installation. Pipe the expansion tank to the suction side of the circulator whenever possible. Install an air separator in the supply piping. Connect the expansion tank to the air separator only if the separator is on the suction side of the circulator. Always install the system fill connection at the same point as the expansion tank connection to the system. Figures 4 and 5 show typical near-boiler piping connections.

Pressure/temperature gauge

Install pressure/temperature gauge in tee on supply piping (as shown in drawing on page 3). The gauge well is a self-closing valve, allowing removal of the gauge without draining the system.

Slowly remove pressure/temperature gauge from well. The self-closing valve could leak if clogged with sediment. If water begins to spray, stop removing gauge. Close system fill valve and drain enough water to release system pressure before continuing with gauge removal. Escaping hot water could cause severe personal injury.

Relief valve

Install relief valve vertically in ¾" tapping on side of boiler. See Figure 4 or 5 and the tag attached to the relief valve for manufacturer’s instructions.

To avoid water damage or scalding due to relief valve operation:

•Discharge line must be connected to relief valve outlet and run to a safe place of disposal. Terminate the discharge line to eliminate possibility of severe burns should the valve discharge.

•Discharge line must be as short as possible and be the same size as the valve discharge connection throughout its entire length.

•Discharge line must pitch downward from the valve and terminate at least 6" above the floor drain where any discharge will be clearly visible.

•The discharge line shall terminate plain, not threaded, with a material serviceable for temperatures of 375 °F or greater.

•Do not pipe the discharge to any place where freezing could occur.

•No shutoff valve shall be installed between the relief valve and boiler, or in the discharge line. Do not plug or place any obstruction in the discharge line.

•Failure to comply with the above guidelines could result in failure of the relief valve to operate, resulting in possibility of severe personal injury, death or substantial property damage.

•Test the operation of the valve after filling and pressurizing system by lifting the lever. Make sure the valve discharges freely. If the valve fails to operate correctly, replace it with a new relief valve.

System water piping

See Figure 4 (diaphragm-type or bladder-type expansion tank) or Figure 5 (closed-type expansion tank) on page 15, and Table 3 below, for near-boiler and single-zone systems designed for return water at least 130 °F.

See pages 16-17 to complete multiple-zone piping or pages 18-23 to complete piping for radiant heating systems or converted gravity systems.

Refer to page 23 for boilers used with refrigeration systems.

Table 3 Water pipe size (based on 20 °F rise)

Boiler

To

From

model

system

system

number

 

 

CGs-3

1"

1"

 

 

 

CGs-4

1"

1"

 

 

 

CGs-5

1"

1"

 

 

 

CGs-6

1 ¼"

1 ¼"

 

 

 

Note: Circulator flange supplied with boiler is same size as recommended piping above.

Install boiler such that —

•Chilled medium, if used, is piped in parallel with heating boiler. Use appropriate valves to prevent chilled medium from entering boiler. Consult I=B=R Installation and Piping Guides.

•If boiler is connected to heating coils located in air handling units where they can be exposed to refrigerated air, use flow control valves or other automatic means to prevent gravity circulation during cooling cycle. Circulation of cold water through the boiler could result in damage to the heat exchanger, causing possible severe personal injury, death or substantial property damage.

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Part number 550-110-260/0200

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Contents Page How it works ① Control modulePage Contents User InstallerPlease read before proceeding 1a Prepare boiler location codes & checklist Flooring and foundation Residential garage installation1b Prepare boiler location clearances 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 Prevent chilled water from entering boiler 3f system-bypass alternate piping3g Water piping refrigeration system Gas piping Connecting gas supply piping to boilerVenting and combustion air 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 for 7c Start-up if boiler doesn’t startCheck burner flames 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.

One of the standout features of the Weil-McLain 550-110-260/02002 is its robust construction. Built using durable materials, this boiler is engineered to withstand demanding environments while maintaining optimal performance. The unit boasts a high thermal efficiency rating, which translates to lower energy costs and reduced environmental impact. The advanced design ensures that fuel consumption is minimized while delivering consistent heat output.

The Weil-McLain 550-110-260/02002 utilizes a multi-stage burner that enhances combustion efficiency. This feature not only reduces emissions but also improves overall energy use, making it an environmentally friendly choice. The sophisticated control system allows for precise modulation of the burner, ensuring that the boiler operates at peak efficiency under various load conditions.

The boiler is equipped with a user-friendly digital control interface, providing operators with real-time monitoring and diagnostics. This allows for easy adjustments and troubleshooting, which helps to reduce maintenance downtime. The integrated safety features enhance the operational reliability of the unit, ensuring safe operation in any environment.

Another important characteristic of the Weil-McLain 550-110-260/02002 is its adaptability. It can be configured to work with various types of fuel including natural gas and propane, giving users the flexibility to choose the most cost-effective energy source. This versatility also helps to extend the lifespan of the boiler as it can be easily adapted to changing energy needs.

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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