Weil-McLain 550-141-850/0599, GOLD DV WATER BOILER manual IIIi Water piping snow melt system

Page 35

•Installation • Start-Up • Parts • Maintenance

IIIi Water piping — snow melt system

Figure 15a Manual bypass valves; for fixed temp operation only

Snow melt

heat exchanger

Heating zone(s)

12"

max

Cold water

fill

GV Boiler

85014b

Figure 15b Auto return temp regulation; for outdoor reset or fixed temp

Snow melt

heat exchanger

Heating zone(s)

12"

max

Cold water

fill

GV Boiler

85016

Piping snow melt systems or combination snow melt/ space heating systems

Combination snow melt/space heating systems will have widely varying system return temperatures. So these systems require automatic return water temperature as shown in Figure 15a (zone-valve zoning) or Figure 15b (circulator zoning).

Select an automatic temperature control valve or motor- operated valve which can be adjusted to provide a return water temperature of at least 60 °F. Any setting higher than 60 °F will also be acceptable.

Zone-valve zoning — The suggested piping uses a separate circulator for system circulation to assure good temperature distribution in the system when the return water temperature is low.

Circulator zoning — The GV internal circulators must not be removed. Provide a separate circulator for each zone.

The return water temperature to the boiler must be at least 60 °F. Provide and apply means to regulate the return temperature. Failure to do so can result in boiler control operation problems, causing possible significant property damage.

Legend

1Boiler isolation valves

2Automatic air vent (with diaphragm-type expansion tank), or connect to tank fitting (closed-type expansion tank).

3Diaphragm- or bladder-type expansion tank, if used (For closed-type expansion tank, pipe from top of air separator to tank fitting as in Figure 10.)

4Zone valve

5System or zone circulator

6Flow/check valve

7Hose bibb purge valve

8Boiler pressure/temperature gauge

9System supply temperature gauge

12Return temperature automatic mixing valve

Part number 550-141-850/0699

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Image 35

Contents Gold GV How it works Gold GV Water boiler Series Please read before proceeding Hazard definitions Installer UserBoiler water When servicing boilerBoiler operation Contents Contents Overview of this section Ia Prepare boiler location overviewIb Prepare boiler location codes & altitude Installations must follow these codesSmall space Ic Prepare boiler location clearancesClearance options Large spaceFlooring Residential garage installationPrecautions Flooring and foundationGV special vent system Id Prepare boiler location vent systemRemoving from existing vent Air contamination Ie Prepare boiler location contaminationIf Prepare boiler location air openings GV in small space less than alone Special considerationsIIb Prepare boiler vent starter tee & drain IIa Prepare boiler overviewScrew hole Base rail Insert Cpvc elbow Propane Plate installationIIc Prepare boiler orifice plate Natural gasBottom side of boiler front section IId Prepare boiler high altitude kit When requiredWhite Hose Red Altitudes above 5,500 feet onlyIIe Prepare boiler place in position Rotate Fill and pressure test IIf Prepare boiler pressure testPerform hydrostatic pressure test Prepare boiler for test FigPiping connections for hydrostatic test For heating system with See pages 27 30 IIIa Water piping overviewIIIb Water piping relief valve Install relief valveExpansion tank IIIc Water piping boiler connectionsSupply & return connections Air separatorPiping closed Zoning with circulators IIId Water piping all systemsBaseboard system piping IIIe Water piping baseboard systemRadiator system piping IIIf Water piping radiator systemIIIg Water piping single-zone radiant or heat pump system Multi-zone radiant heating system piping Outdoor reset controlIIIh Water piping multi-zone radiant system Manual bypass valves for fixed temp operation only IIIi Water piping snow melt systemWater chiller systems IIIj Water piping water chiller systemsIV Venting and combustion air Propane Gas Connecting gas supply piping to boilerGas piping Feet Thermostats VI Field wiringElectrical installation must comply with Wiring connectionsField wiring Factory wiring Verify water chemistry Freeze protection when usedVIIa Start-up overview VIIb Start-up preparationFill the system with water VIIb Start-up preparationVerify gas/air orifice plate Check for gas leaksStart the boiler VIIc Start-up read SectionVIId Start-up to operate boiler Perform final checks before starting boilerVIIe Start-up if boiler doesn’t start VIId Start-up operate boilerCheck Gas Control Set Point Connect and adjust manometerVIIf Start-up altitude over 5,500 feet only At Least Inches Check-out procedure checklist VIIIa Check-out procedure overviewVIIIb Check-out procedure checklist IXa Operation overview Shows the ladder wiring diagram for the GV series 3 boilerSteps IXb Operation sequenceLadder diagram legend IXb Operation wiring diagramsGCM IXc Operation lighting instructions For Your Safety Read Before OperatingWhite-Rodgers gas valve model 36E Xa Service and maintenance overview Service technician Xb Service and maintenance scheduleAnnual start-up only by qualified service technician Xc Service & maintenance annual start-upStart-up Annual start-up check/test Xc Service & maint. annual start-upcontIgniter Expansion tankGauges Review with owner Annual start-up owner reviewBoiler relief valve Condensate drain line Check valve assembly To remove the blower assembly Igniter XIa Troubleshooting overview Check the following XIb Troubleshooting proceduresBefore troubleshooting Checking the air pressure switch XIc Troubleshooting air pressure switchGas Valve XId Troubleshooting servicing tipsBlower Housing IgniterControl Module XIe Troubleshooting control modulePower Symptom Common Causes Possible Corrections XIf Troubleshooting common problemsSymptom Common Causes Possible Corrections Chart 1 Troubleshooting Power light status XIg Troubleshooting GCM lightsChart 2 Tstat Circ & Power lights flashing Chart 3 Limit & Power lights flashing Chart 4 Pres Switch & Power lights flashing Chart 5 Flame & Power lights flashing Chart 6 Tstat Circ light flashing and Power light on steady Chart 7 Limit light flashing and Power light on steady Is thermostat circuit closed continuity across wires? XIIa Replacement parts overview Water trim bag assembly #1 XIIb Replacement parts accessory bagDescription Model Weil-McLain Number Part number XIIc Replacement parts section assembly85041 422-200-228 XIId Replacement parts jacket assembly85042 382-200-340 XIIe Replacement parts Blower assemblyVent starter tee not included Description Weil-McLain Number Part number XIIf Replacement parts trim assembly85048 XIIg Replacement parts interior panel Interior panel Number Xiii Dimensions and ratingsDOE Gold GV Water boiler Series