Utica Boilers UB90-100 Operation and Installation Manual
Contents
1. CO2 10 0 11 1 CO lt 100 ppm Ori ce 43331095 Burner Plate 109006405 MODELS 075 MBH Stock Factory Btu Value of Propane Gas Settings 2300 2350 2400 2450 2500 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 75 Combustion Setting CO2 10 0 11 1 CO lt 100 ppm Ori ce 43331093 43331096 Burner Plate 109009107 For model 075 LP units only at altitudes above 5 000 ft install 075 MBH High Altitude Ori ce Kit 5550002629 which includes 43331096 ori ce MODELS 100 MBH Stock Factory Btu Value of Propane Gas Settings 2300 2350 2400 2450 2500 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 100 Combustion Setting CO2 10 0 11 1 CO lt 100 ppm Ori ce 43331091 Burner Plate 109009105 Contact local gas utility or distributor for Btu value of gas HIGH ALTITUDE RATINGS FOR PROPANE Figure 3 Gas Valve Adapter Detail2. adapter block from gas valve Take care not to lose o ring under the block See Figure 3 4 Use adjustable or 1 wrench on bushing to remove gas ori ce assembly from mixer turning counter clockwise Do not use channel locks pipe wrench etc as damage to bushing may occur See Figure 2 5 Use small pipe wrench to remove ori ce from bushing by turning counter clockwise Install correct ori ce for boiler being converted Apply small amount of pipe dope to threads of ori ce leaving last two threads clean Turn clockwise into bushing TABLE 1 NATURAL GAS MODELS 050 MBH Stock Factory Btu Value of Natural Gas Settings 750 850 950 1000 1050 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 50 Combustion Setting CO2 8 7 9 7 CO lt 100 ppm Gas Ori ce 43331094 Burner Plate 109006405 MODELS 075 MBH Stock Factory Btu Value of Natural Gas Settings 750 850 950 1000 1050 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 75 Combustion Setting CO2 8 7 9 7 CO lt 100 ppm Gas Ori ce 43331092 Burner Plate 109006406 MODELS 100 MBH Stock Factory Btu Value of Natural Gas Settings 750 850 950 1000 1050 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 100 Combustion Setting CO2 8 7 9 7 CO lt 100 ppm Gas Ori ce 43331090 Burner Plate 1090091
3. 05 Contact local gas utility or distributor for Btu value of gas PRESSURE REFERENCE PRESSURE 4 WAY CONNECTOR PRESSURE REGULATOR ADJUSTMENT UNDER COVER SCREW GAS VALVE VENT OUTLET PRESSURE TAP 1 8 PLUG DIFFERENTIAL PRESSURE GAUGE TO PRESSURE SWITCH WHITE TRANSPARENT VINYL TUBING U TUBE MANOMETER BUSHING MIXER ON OFF C HIGH ALTITUDE RATINGS FOR NATURAL GAS Figure 2 Gas Assembly and Inlet Air Assembly 3 6 Apply pipe dope to bushing threads Install gas ori ce assembly turning clockwise into mixer DO NOT USE TEFLON TAPE 7 Attach adapter block to gas valve 8 75 MBH Chose table for correct type of fuel supplied to your boiler Replace burner plate with plate listed in correct table Different burner plate is used for Nat and LP fuels 9 Install top panel Restore electrical and gas supply Set thermostat high enough to start boiler Restart boiler Check for gas leaks using soapy water or commercial leak detector 10 Fill out data on adjustment conversion label Attach to inside left panel of boiler 11 Install front door Operate boiler through at least 6 ignition cycles to check for proper operation of the boiler before leaving job site TABLE 2 PROPANE GAS MODELS 050 MBH Stock Factory Btu Value of Propane Gas Settings 2300 2350 2400 2450 2500 Altitude in Ft 0 5 000 5 000 10 000 Normal Input MBH 50 Combustion Setting
4. HIGH ALTITUDE MANIFOLD PRESSURE ADJUSTMENT 1 Turn off manual gas valve 2 Remove manifold pressure tap plug marked Outlet Pressure Tap from gas valve using 3 16 Allen wrench Install NPT x barbed tting See Figure 1 3 Connect manometer or gauge to gas valve pressure tap barbed tting just installed in step 1 Manometer should be capable of reading 1 to 15 inches of water column See Figure 2 4 Turn electrical power and gas supply on Set thermostat high enough to start boiler 5 Start boiler 6 Note gas manifold pressure on manometer or gauge Manometer or gauge reading should be 2 inches water column at start up 7 To adjust manifold pressure remove Pressure Regulator Adjustment Cap located on gas valve to gain access to regulator adjustment screw Turn adjustment screw clockwise to increase pressure and counterclockwise to decrease pressure See Figure 1 NOTICE When doing this procedure place pressure regulator cap back in place to obtain correct reading Not putting cap in place gives false reading of manifold pressure 8 Adjust manifold pressure to indicated value using known gas Btu value and known altitude of installation See Tables 1 and 2 on following pages P N 240009672 Rev D 06 2013 50 75 100 MBH GAS CONVERSION INSTRUCTIONS AND HIGH ALTITUDE MANIFOLD PRESSURE ADJUSTMENT FOR ALUMINUM BLOCK BOILERS Please read these instructions carefully before starting the ad
5. justment or conversion process These changes must be performed by a quali ed service agency OFF ON INLET OUTLET PRESSURE REGULATOR ADJUSTMENT UNDER CAP SCREW INLET PRESSURE TAP VR8205 WIRING TERMINALS 2 OUTLET PRESSURE TAP SUPPLEMENTAL INSTRUCTIONS DANGER Before servicing turn off electrical power to boiler at service switch Close manual gas valve to turn gas supply OFF to boiler Failure to comply will result in death or serious injury 9 Once correct pressure reading is obtained and remains steady shut off boiler at thermostat shut off manual gas valve and electrical supply Remove manometer or gauge barbed tting and replace pressure tap plug 10 Restore electrical and gas supply restart boiler and check for gas leaks using soapy water or a commercial leak detector 11 Fill out data on adjustment conversion label and attach to inside left panel of boiler Operate boiler through at least 6 ignition cycles to check for proper operation of boiler before leaving job site Figure 1 Gas Valve Detail EFFECTIVE DATE SEPTEMBER 1 2012 2 See Tables 1 and 2 for speci c high altitude ori ce information Gas Conversion Procedure When changing from Natural to Propane or vice versa use correct conversion ori ce for boiler model 1 Turn off manual gas valve 2 Remove front door Use 5 16 nut driver to remove top panel 3 Use 9 64 Allen wrench to remove
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