Boiler Manual - Weil-McLain

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GV90+ gas-fired water boiler — Boiler ManualDimensions and ratingsFigure 107 Dimension drawing (see Figure 108, page 101 for dimensional table)Item Descriptionnumber1 1” NPT Supply2 1” NPT Return3 Combination pressure-temperature gauge, 2 ½” short shank4 ¾” NPT Relief valve outlet5 Plug dome, 2” black6 Junction box7 Inlet air fitting, 3" PVC8 Flue outlet, 3" PVC9 ½” Condensate drain10 ½” NPT Gas supply connection (provided by others)11 Drip leg (provided by others)12 Union (provided by others)13 Manual main shutoff gas valve (provided by others)14 ON/OFF switch100Part number 550-142-054/1211
GV90+ gas-fired water boiler — Boiler ManualDimensions and ratings (continued)Figure 108 Boiler dimensional and physical data (see Figure 107, page 100)BoilermodelSupply Return LengthLGasconnectionsize (Note 1)Electricalservicerequired(includesthe internalcirculators)BoilerwatercontentApprox.shippingweight(inches NPTmale)(inches NPTfemale)(inches)(inches NPTfemale)(amperes) (gallons) (pounds)GV90+3 1 1 30¾ ½ 15 3.8 313GV90+4 1 1 30¾ ½ 15 4.7 353GV90+5 1 1 37¾ ½ 15 6.0 423GV90+6 1 1 37¾ ½ 15 6.9 464Note 1: Gas piping from meter to boiler to be sized per local utility requirements.Figure 109 Boiler ratingsDOEBoilermodelCSAInputDOEHeatingcapacity(Note 1)Net I=B=Rwaterrating(Note 2)AFUE(Note 1)Vent/combustionair diameterBoilerwatercontent% Input derate vs vent length(Values shown are at maximum vent/air pipe length)(Note 3)Direct Exhaust VentingDirect Vent VentingMBH MBH MBH % Inches Gallons Natural gas Propane Natural gas PropaneGV90+3 70 65 56 91.9 3" PVC 3.8 up to 0.7% up to 1.4% up to 1.5% up to 2.8%GV90+4 105 97 84 91.2 3" PVC 4.7 up to 1.0% up to 2.2% up to 4.0% up to 5.4%GV90+5 140 130 113 91.4 3" PVC 6.0 up to 4.0% up to 4.0% up to 7.0% up to 8.0%GV90+6 175 161 140 91.0 3" PVC 6.9 up to 4.0% up to 4.5% up to 7.0% up to 10.0%Notes:1. Based on standard test procedures prescribed by the United States Department of Energy. Ratings alsoreferred to as CSA Output. NOTE that only DOE Heating Capacity and AFUE are certified by AHRI. AFUE isalso know as Annual Fuel Utilization Efficiency or Seasonal Efficiency.2. Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the buildingand nothing need be added for normal piping and pickup. Ratings are based on a piping and pickup allowanceof 1.15 and are determined under the provisions governing forced draft boiler-burner units. An additionalallowance should be made for unusual piping and pickup loads.3. All of the boilers will automatically de-rate as vent length increases, due to the pressure loss through the vent.For vent/air pipe lengths less than the maximum, the derate equals the value above times vent length ÷ 100.4. Boilers are tested for 50 PSIG working pressure.5. GV90+ boilers are not available for millivolt systems.Part number 550-142-054/1211 101
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Boiler Manual - Weil-McLain

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