Weil-McLain CGS-4E 3e Water piping refrigeration systems, Prevent chilled water from entering

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GOLD CGs-4E Gas-Fired Water Boiler — Boiler Manual

3d Piping — low temp systems (continued)

Figure 12 System-bypass piping

Zoning with zone valve or circulators, return water 130°F or higher. (Alternative to boiler-bypass piping Figures 10 and 11, page 21)

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 5, page 15.)

3e Water piping — refrigeration systems

Prevent chilled water from entering

Figure 13 Piping refrigeration systems	boiler
	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 13 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 550-110-282/1108

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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 Vent system When removing boiler from an existing common vent system1c Prepare boiler location vent system CGs-4E special vent systemAreas likely to have contaminants 1d Prepare boiler location contaminationProducts to avoid Sizing air openings 1e Prepare boiler location air openingsCombustion air requirements Special considerationsSizing air openings for CGs-4E installations Inspect orifices and burners 2a Prepare boiler placement & setupOrifice replacement procedure Place boiler/crate near positionPrepare boiler for test 2b Prepare boiler pressure testHydrostatic pressure test Drain and remove fittings3a Water piping general information 3b Water piping single-zone system Install an automatic air vent in air vent tapping as shownPiping multiple zones 3c Water piping multiple zonesFill valve Boiler isolation balancing valves Flow/check valveSystem or zone circulator Zone valve Drain valve Relief valvePrimary/secondary preferred bypass piping method Temperature gaugesValve adjustment Figures 8 and 9 only 3d Piping low temp systemsBoiler isolation balancing valves Blend temperature gaugeBOILER-bypass piping method Valve adjustmentFigures 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 Propane Gas Connecting gas supply piping to boilerGas piping Natural GasThermostat Field wiringElectrical installation must comply with Wiring connectionsCheck for gas leaks Freeze protection when used7a Start-up preparation Determine if water treatment is neededStart the boiler 7b Start-up operate boilerInspect system water piping Inspect base insulation Final check before starting boilerMain burner flame Figure Check burner flamesPilot burner flame Figure Gas not turned on at meter or boiler? If none of the above corrects the problem, refer to7c Start-up if boiler doesn’t start Check forInstallation and service certificate Check-out procedure checklistBoiler is now in the off cycle 9a Operation sequenceSequence returns to step Operation sequence Wiring diagram 9b Operation wiring diagrams9c Operating instructions CGs-4E CMR 5.082a1 through Addendum Instruction for Commonwealth of MassachusettsCMR 5.082a 1 through Exemptions The following equipment is exempt from10a Service and maintenance schedule 10b Service & maintenance annual start-up Inducer motor With boiler power off, place a few drops of S.A.EBurners, base and inlet air box Condensate drain system10b Service & maint. annual start-up Relief valve, typical Boiler relief valvePlace newspapers in base of boiler to collect soot Clean between sections with wire flue brushReview with owner Shut down boilerCan result 11a Troubleshooting procedureBefore troubleshooting Check the followingTroubleshooting air pressure reading 11b Troubleshooting air pressure switchAir pressure switch Check pressure switch settingTroubleshooting the control module 11c Troubleshooting control moduleControl indicator lights Lockout modes Control indicator lights NON-LOCKOUT modesControl module connections Chart 1 Troubleshooting Power light status 11d Troubleshooting control module lightsChart 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 Weil-McLain part number 12b Replacement parts section assemblyBase assembly 12c Replacement parts baseDescription Weil-McLain Part number Jacket assembly 12d Replacement parts jacketBoiler Fittings shown are factory-installed on boiler 12e Replacement parts trimPropane gas components 12f Replacement parts controlsDimensional drawing 13a DimensionsTested for 50 psi working pressure 13b RatingsEye Irrigate immediately Breathing Fresh air Handling ceramic fiber and fiberglass materialsThis type of respirator is based on