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This manual provides information for:

OPERATOR MANUAL

IMPORTANT INFORMATION, KEEP FOR OPERATOR

PART NUMBER 121003 REV D (07/14)

MODEL NGB/3E 

& CNGB/3-24 

STEAM BOILERS

· Gas Heat

· 200,000 BTU/hr Firing Rate

· 3.7 Effective Boiler Horsepower

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READ,  UNDERSTAND  AND  FOLLOW  THE  INSTRUCTIONS  AND 

WARNINGS CONTAINED IN THIS MANUAL.

WARNING / FOR YOUR SAFETY

and liquids in the vicinity of this or any other appliance.

POST IN A PROMINENT LOCATION

Instructions to be followed in the event user smells 

gas.  This information shall be obtained by consulting 

your local gas supplier.  As a minimum, turn off the gas 

and call your gas company and your authorized service 

agent.  Evacuate all personnel from the area.

WARNING

Improper  installation,  adjustment,  alteration,  service 

or  maintenance  can  cause  property  damage,  injury  or 

death.  Read the installation, operating and maintenance 

instructions thoroughly before installing or servicing this 

equipment.

NOTIFY CARRIER OF DAMAGE AT ONCE

It is the responsibility of the consignee to inspect the container upon receipt of 

same and to determine the possibility of any damage, including concealed dam-

age. Unified Brands suggests that if you are suspicious of damage to make a 

notation on the delivery receipt. It will be the responsibility of the consignee to file 

a claim with the carrier. We recommend that you do so at once.

Manufacture Service/Questions 888-994-7636.

Information contained in this document is known to be current and accurate at the time 

of  printing/creation.  Unified  Brands  recommends  referencing  our  product  line  websites, 

unifiedbrands.net, for the most updated product information and specifications.

1055 Mendell Davis Drive 

Jackson, MS 39272

888-994-7636,  fax 888-864-7636

unifiedbrands.net

Summary of Contents for CNGB/3-24

Page 1: ...ustment alteration service or maintenance can cause property damage injury or death Read the installation operating and maintenance instructions thoroughly before installing or servicing this equipmen...

Page 2: ...MANUFACTURER WARNING DO NOT MIX DE LIMING AGENTS ACID AND DE GREASERS ALKALI IN THE STEAM GENERATOR OR ON THE COOKING CHAMBER WALLS NOTICE Do not use a cleaning or de liming agent that contains any S...

Page 3: ...0 NATIONAL FIRE PROTECTION ASSOCIATION 60 Batterymarch Park Quincy Massachusetts 02269 NFPA 70 The National Electrical Code NFPA 54 Installation of Gas Appliances Piping NFPA 96 Ventilating Hoods NSF...

Page 4: ...The boiler is constructed of 1 4 thick steel which is certified by the American Society of Mechanical Engineers ASME for pressure vessels All welds are hydrostatically tested The boiler is also equip...

Page 5: ...0 to 60 ppm Chlorine and Chloramine less than 0 1 ppm Total Chloride less than 30 ppm Silica less than 12 ppm Undissolved Solids less than 5 microns 1 Do not rely on unproven water treatments which ar...

Page 6: ...system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 PSI 3 45 kPA 1 Gas Supply Connection a Co...

Page 7: ...Connection a The drain connection is made at the rear of the unit with 1 1 4 NPT pipe DO NOT USE PLASTIC PIPE DRAIN PIPING MUST WITHSTAND STEAM AND BOILING WATER Extend the drain piping to a nearby fl...

Page 8: ...repeat the trial for ignition 5 Turn the on off switch on the cabinet front panel to the ON position The amber light in the switch will come on The boiler drain valve will close The unit will fill wit...

Page 9: ...ically stop the gas flow and terminate the ignition trial If ignition is terminated turn the switch off and then ON again to repeat the trial Normally the pilot should light within five seconds of tur...

Page 10: ...nce the pressure has reached 9 1 2 PSI the main burner will be shut off by an operating pressure switch Residual heat stored in the boiler s heat exchanger can however cause the pressure to continue t...

Page 11: ...under the boiler 3 Close the manual drain valve 4 Turn off water supply to the boiler 5 Allow the boiler to cool This takes several hours so it is recommended that you cool the boiler overnight 6 Tur...

Page 12: ...r doors 19 Turn the on off switch OFF and slowly open the manual drain valve 20 When the boiler has drained completely close the manual drain valve and turn the on off switch to ON to fill the boiler...

Page 13: ...hnician a weekly check of the following will help prevent down time and ensure continued efficient operation 1 Pressure gauge operation 2 Proper water level gauge 3 Strainer in water feed line clear 4...

Page 14: ...reater than 60 PSI Authorized Service Rep Only c Is the Water Level Control Board defective Check for loose electrical connections on hi water fill solenoid X d Is the water fill solenoid valve defect...

Page 15: ...uilds pressure but shuts down RESET light comes on User a Is the water level below the mid water level probe Verify that the water supply is sufficient to maintain the water level at or above the mid...

Page 16: ...7a Main Burner Assy 0 2000 Ft Elev Incl 29 Gas Jets W 54 Drill Dia Hole For Natural Gas 047267 7a Main Burner Assy 0 2000 Ft Elev Incl 29 Gas Jets W 68 Drill Dia Hole For Propane Gas 050491 8 Gas Val...

Page 17: ...ressure Relief Valve 12PSI 099228 7 Water Level Probes lo med hi 076526 8 Solenoid Valve Water in 099220 9 Check Valve 004187 10 Air Vent 145167 11 Vacuum Breaker 090787 12 Globe Valve 1 2 NPT 099255...

Page 18: ...nal Block 2 Pole 003887 Bushing Snap 11 16 ID 012864 7 Circuit Board Support 099292 8 Water Level Control Board Assembly 116016 9 Lug Ground 14 6 AWG 119829 10 Circuit Breaker 119860 11 Transformer 75...

Page 19: ...ED 11 WHITE P1 J1 1 TSTAT DRAIN VALVE 1 2 2 T1 LO 14 5 PSI OPERATING PRESSURE GAS VALVE 7 YELLOW 8 BLACK C HL 12 BLACK 10 BLACK 9 RED C PS SW H C G BLACK YELLOW BLUE WHITE 4 BLACK 6 BROWN 5 BLUE 3 BRO...

Page 20: ...20 OM NGB 3 Service Log Model No Purchased From Serial No Location Date Purchased Date Installed Purchase Order No For Service Call Date Maintenance Performed Performed By...

Page 21: ...OM NGB 3 21 Service Log Model No Purchased From Serial No Location Date Purchased Date Installed Purchase Order No For Service Call Date Maintenance Performed Performed By...

Page 22: ...22 OM NGB 3 Service Log Model No Purchased From Serial No Location Date Purchased Date Installed Purchase Order No For Service Call Date Maintenance Performed Performed By...

Page 23: ...OM NGB 3 23 Service Log Model No Purchased From Serial No Location Date Purchased Date Installed Purchase Order No For Service Call Date Maintenance Performed Performed By...

Page 24: ...REV D 07 14 1055 Mendell Davis Drive Jackson MS 39272 888 994 7636 601 372 3903 Fax 888 864 7636 unifiedbrands net 2014 Unified Brands All Rights Reserved Unified Brands is a wholly owned subsidiary o...

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