background image

Model 702G/O Advanced gas/oil burners — Instruction manual

Carlin part number MN702GO Rev. 06/23/14

– 10 –

Where appliance instructions differ from this manual, follow the appliance instructions.

Inspect burner and components

• 

Check the air tube length. Verify the usable length of the tube UTL will 

be long enough (see “Mount burner in appliance”).

• 

Visually inspect all burner components and wiring.

• 

Verify that wiring is intact and leads are securely connected.

• 

Verify that all burner components are in good condition.

  Do not install or operate the burner if any component is 

damaged or if burner does not comply with other guidelines 

of this manual and the appliance manual.

Mount burner in appliance

Welded-flange burners

1. 

Verify the bolt pattern on the appliance chamber matches the flange 

pattern.

2. 

Verify the insertion depth (UTL) matches the depth of the appliance 

opening (so the end of the air tube is flush with, or slightly short of, the 

inside surface of the combustion chamber).

3. 

Place gasket onto boiler front plate.

4. 

Slide the end of the air tube into the opening and secure the flange to 

the boiler front plate.

Burners with adjustable flanges

1. 

 Verify the flange mounting slots will line up with the appliance bolts. (See 

Figure 4 for adjustable flange dimensions.)

2. 

Place the flange gasket in position on the appliance mounting plate.

3. 

Measure the distance from the inside of the combustion chamber to the 

outside of the appliance mounting plate. Slide the adjustable flange on 

the air tube until it is this distance from the end of the air tube.

4. 

Mark this position of the flange on the air tube with a pencil or pen so you 

can verify the flange is correctly positioned as you complete the installa-

tion. The end of the air tube must be flush, or almost flush, with the inside 

of the combustion chamber wall. (See Figure 3, page 9)

5. 

Tighten the flange locking screws finger tight.

6. 

Insert the air tube/flange assembly into the appliance opening. (Rotate 

the flange if needed to align with the mounting bolts.) Secure the flange 

to the appliance front plate.

7. 

See the following instructions to install the burner pedestal, needed to 

properly support the burner.

  A forced draft adjustable flange must be sealed to the air 

tube to prevent possible leakage of flue products. Failure 

to comply could result in severe personal injury, death or 

substantial property damage.

Figure 4

 

Adjustable flange

2.  Prepare site  •  assemble burner  •  mount burner 

(continued)

Install the burner pedestal

  702G/O burners supplied with an adjustable flange are also 

supplied with a pedestal for supporting the burner. (The 

pedestal is available as an option for a burner equipped 

with a welded flange.)

1. 

Adjust the pedestal so that the height of the air tube matches the location 

of the burner opening.

2. 

The pedestal has approximately 3" of adjustment. If the burner opening 

is too high for the pedestal to rest on the floor, then construct a base. 

Two solid cement blocks, side by side, is recommended. Alternate the 

direction as layers are put down.

3. 

Place a spirit level on the air tube. Adjust the pedestal so the air tube 

slopes down slightly toward the appliance. The slope should be about 

2 degrees.

4. 

Tighten the pedestal bolt securely.

Install the oil nozzle

1. 

Follow the instructions on page 24 to remove the combustion head 

assembly.

2. 

Install and tighten the nozzle listed in the appliance instruction manual or 

the Carlin OEM Spec Guide. If nozzle information is not available, begin 

with the nozzle listed on page 4. (You may have to change the nozzle 

later if combustion results are not acceptable.)

3. 

Slide the flame scanner sight pipe assembly to the rear by loosening the 

1/8” Allen screw on the holding base.

4. 

Hold the nozzle adapter securely when removing or replacing the nozzle. 

Take care not to damage the electrode insulators or to bend the electrodes 

in the process.

  Inspect the nozzle adapter before replacing the nozzle. If the 

threads have been damaged or show score marks, replace 

the nozzle line/adapter assembly.

Summary of Contents for 702G/O

Page 1: ...stantial property damage USER Refer only to User care and maintenance on back page for information regarding operation of this burner The burner Instruction Manual is intended only for your service te...

Page 2: ...uidelinesbelowtoavoidpotentialsevere personal injury death or substantial property dam age Installer service technician Read all instructions before proceeding Perform all procedures and in the order...

Page 3: ...n of Domestic Gas Conversion Burners ANSI Z21 8 National Fuel Gas Code ANSI Z223 1 NFPA 54 Standard for the Installation of Oil Burning Equipment NFPA 31 National Electrical Code ANSI NFPA 70 All addi...

Page 4: ...firing Then gas flow is adjusted to match the air flow at low and high fire rates See the Starting and operating section of this manual for the complete description of the adjustment process The foll...

Page 5: ...d assembly 22 Oil valve junction box 23 1st stage oil valve 24 Safety oil valve 25 2nd stage oil valve fuel unit blocking valve 29 Gas manifold 30 Gas spuds 4 required 31 Gas butterfly valve 32 Butter...

Page 6: ...vent piping on the appliance flue outlet Clearances Check codes standards and the equipment manual Verify that the burner appliance will maintain all clearances to combustible walls or floor and all c...

Page 7: ...ea area times 0 25 2 Metal louvers or grilles free area area times 0 60 3 Screens when used must be no smaller than inch mesh Motorized vent dampers Wire the vent damper end switch to prevent operatio...

Page 8: ...Prepare appliance for burner mounting Positive overfire pressure applications When firing with positive overfire pressure do not exceed the pressure specified in the appliance manual Positive overfir...

Page 9: ...target wall liner if flame length is close to the length of the chamber 3 Use a floor liner when possible The floor liner will improve firing in most applications Extend floor liner 3 to 4 inches up t...

Page 10: ...tube flange assembly into the appliance opening Rotate the flange if needed to align with the mounting bolts Secure the flange to the appliance front plate 7 See the following instructions to install...

Page 11: ...separate instructions if installing an optional knocked down gas train The gas train is available in either an angled standard or straight optional configuration 2 Connect the main and pilot gas trai...

Page 12: ...s orifice nipple item 1 page 29 The label on the orifice nipple must agree with the gas used natural or propane gas If the nipple is not correct for the gas being used obtain the correct orifice nippl...

Page 13: ...han 0 60 consult National Fuel Gas Code for correction factor PROPANE GAS Capacities in Btuh for Schedule 40 metal pipe Propane gas 1 5 specific gravity pressure drop 1 psi 1 839 1 264 1 015 869 770 3...

Page 14: ...vacuum does not exceed the limit below during all firing conditions Oil flow schematic fuel unit connections Figure 10 shows oil flow and fuel unit port functions for Carlin 702G O burners Figure 11 a...

Page 15: ...et 3 8 O D 1 2 O D 0 41 100 2 37 100 4 32 100 6 28 100 8 24 96 10 20 80 12 16 64 14 48 16 32 Figure 11 702G O burner with NYC DAR pressure regulation kit Obtain pressure regulator kitsforNewYorkCityDe...

Page 16: ...applicable local codes standards 2 Connect the burner following Figures 13 and 14 and any special instructions or wiring diagrams provided with the appliance burner or other components 3 The burner re...

Page 17: ...ns or wiring diagrams provided with the appliance burner or other components 3 The burner requires a 120 VAC 60 hz single phase control power supply with a 5 amp fuse The control circuit current draw...

Page 18: ...cycle to low fire as demand decreases This keeps the burner on longer reducing cyclic losses 2 The appliance must be equipped with a high fire control This would be a make on fall control either temp...

Page 19: ...high low cycles The firing cycle can be much longer using low high low firing because the burner can cycle to low fire as demand decreases This keeps the burner on longer reducing cyclic losses 2 The...

Page 20: ...vent system Are voltages correct Burner appliance and motor correctly wired per burner and appliance manuals and wiring diagrams Gas manifold spud orifices on gas manifold item 29 page 5 sealed with p...

Page 21: ...est instruments and make final burner adjustments Figure 17 Set initial low fire air damper setting Figure 16 Set initial combustion head position Low fire input High fire input Combustion head positi...

Page 22: ...Failure to properly adjust the burner can result in severe personal injury death or substantial property damage Start the burner firing on oil Do not start the burner if the combustion chamber contai...

Page 23: ...7 Restart the burner and check modulation again Continue with 1 through 6 above as needed until results are acceptable 8 Turn off the burner when Step 3 is completed before proceeding with setup for g...

Page 24: ...o OFF The burner will shut down 5 Temporarily install two U tube manometer connections to check gas pres sures Install connections at the inlet pressure tap of the main manual gas valve and at the dow...

Page 25: ...Tighten the swivel joint in place 10 Raise the damper motor linkage by pulling up on the damper linkage locknut and hold in this position The butterfly valve shaft slot must be horizontal If not use a...

Page 26: ...xhausted from building If the building contains any exhaust fans or conditions that could affect vent performance check burner appliance vent operation with exhaust fans or other conditions operating...

Page 27: ...tears can break away and plug the nozzle or fuel unit Perform the complete checkout procedures of pages 18 to 23 including system inspection and checks Inform the user of any problems found 8 Maintena...

Page 28: ...h Oil nozzle size pattern Manifold gas pressure IWC High fire Low fire Inlet gas pressure IWC CO2 Oil Low Fire ______ Oil High Fire ______ Gas Low Fire ______ Gas High Fire ______ O2 Oil Low Fire Oil...

Page 29: ...Model 702G O Advanced gas oil burners Instruction manual Carlin part number MN702GO Rev 06 23 14 29 Where appliance instructions differ from this manual follow the appliance instructions...

Page 30: ...appliance instructions differ from this manual follow the appliance instructions 9 Dimensions Figure 19 Dimensional data straight gas train configuration 1 Honeywell R7897C primary control standard 2...

Page 31: ...liance instructions differ from this manual follow the appliance instructions Figure 20 Dimensional data angled gas train configuration 9 Dimensions continued 1 Honeywell R7897C primary control standa...

Page 32: ...ed for high fire 23556S 6 Fuel line 75291 7 Airflow switch 98522 8 Honeywell M436 damper motor 35808 9 Gasket 40246 10 14 airtube with pressurized flange 1 main gas inlet 1 2 pilot inlet 99541 11 14 c...

Page 33: ...art number MN702GO Rev 06 23 14 33 Where appliance instructions differ from this manual follow the appliance instructions 10 Repair parts continued For parts not shown or listed contact factory and or...

Page 34: ...ruct the flow of combustion and ventilating air Most motors currently used on residential type burners use permanently lubricated bearings and do not require field lubri cation Read the label on the m...

Reviews: