4e Water piping refrigeration system | Weil-McLain 550-110-710/0107

GOLD CGi Gas-Fired Water Boiler — Boiler Manual

4d Piping — low temperature systems (continued)

Figure 24 System-bypass piping — Zoning with zone valve or circulators, return water 130°F or higher — (Alternative to boiler- bypass piping Figures 22 and 23)

3 System or zone circulator

7 System temperature valves (see instructions to the left for adjusting valves)

8 Blend temperature gauge

9 Relief valve

10 Automatic air vent (with diaphragm-type expan- sion tank), or connect to tank fitting (closed-type expansion tank). DO NOT use an automatic air vent when using closed-type expansion tank. It would allow air to leave the system, causing waterlogging of the expansion tank.

11 Fill valve

12 Diaphragm-type or bladder-type expansion tank, if used (For closed-type expansion tank, pipe from top of air separator to tank fitting as in Figure 17, page 21.)

4e Water piping — refrigeration system

Figure 25 Piping refrigeration systems

Prevent chilled water from entering boiler

Install boiler so that chilled medium is piped in parallel with the heating boiler. Use appropriate valves to prevent chilled medium from entering boiler. See Figure 18 for typical installation of balancing valve and check valve.

If boiler is connected to heating coils located in air han- dling units where they can be exposed to refrigerated air, use flow control valves or other automatic means to prevent gravity circulation during cooling cycle.

Part Number 550-110-710/0107	29

Image 29

Weil-McLain 550-110-710/0107 manual 4e Water piping refrigeration system, Prevent chilled water from entering boiler

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 Products to avoid 1d Prepare boiler location air contamination Air openings must be provided 1e Prepare boiler location air openingsAir opening options Two openings Air supply from inside the building Motorized air dampers Exhaust fans and air moversSingle air opening option Exception for large spaces Orifice replacement procedure 2a Prepare boiler placement & setupPlace boiler/crate near position Inspect orifices and burners Hydrostatic pressure test 2b Prepare boiler pressure testDrain and remove fittings Prepare boiler for test Venting chimney draft venting 3a Venting general informationCGi venting methods Chimney draft or Direct exhaust Chimney draft venting Obtain vent system components 3c Venting Direct exhaust components Vent StaR-34 Vent starter 3d Venting direct exhaust vent starter Vent termination minimum clearances 3e Venting direct exhaust termination Sidewall 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 Piping multiple zones 4c Water piping multiple zones Zoning with circulators Temperature gauges 4d Piping low temperature systemsValve adjustment Primary/secondary preferred bypass piping method Primary/secondary piping BOILER-bypass piping method Valve adjustment Boiler-bypass piping Zoning with SYSTEM-bypass piping method Prevent chilled water from entering boiler 4e Water piping refrigeration system Gas piping Connecting gas supply piping to boilerNatural Gas Propane Gas Electrical installation must comply with Field wiringWiring connections Thermostat 7a Start-up preparation Freeze protection when usedCheck for gas leaks Determine if water treatment is needed Fill the system with water Do not use petroleum-based cleaning or sealing compoundsInspect system water piping Inspect base insulation Check system and boiler 7b Start-up operate boilerStart the boiler Check burner flames 7c Start-up if boiler doesn’t startCheck for Pilot burner flame Figure Thermostats Check-out procedure checklist During main burner operation 9a Operation sequence Schematic wiring diagram 9b Operation wiring diagrams Ladder 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 Verify Proper Operation After Servicing 10a Service and maintenance schedule 10b Service and maintenance annual start-up Burners and base 10b Service & maintenance annual start-upCondensate drain system Inducer motor Cold fill and operating pressures Gas pipingAir vents and air elimination Limit controls and cutoffs Review the User’s Information Manual with the owner Review with ownerBoiler relief valve 11b Troubleshooting components 11a Troubleshooting procedureBefore troubleshooting Air pressure switch Troubleshooting the control module Control indicator lightsControl indicator lights Lockout modes Control module Control module connections Chart Light flashing 11c Troubleshooting control module lightsRemove 120 VAC in plug , Item 3, page 50 on control module VAC in plug Chart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Usually indicates flame sensed when it shouldnt be there Chart 4 Flame & Power lights flashing Does blower motor operate? Item 8 , Operation, Figure Verify Sequence Controls Repair Parts Lists 12a Replacement partsSection assembly Base Jacket Trim Controls 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 BoilerModel Weil-McLain part number Fittings shown are included with boiler 12e Replacement parts trim Propane gas components 12f Replacement parts controls Dimensional drawing 13a Dimensions 13b Ratings Removal of Combustion Chamber Lining or Base Panels Handling ceramic fiber and fiberglass materials