Carlin 702GAS Скачать руководство пользователя страница 20

MN702GE  060320

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Step 1 

Check gas pilot operation

 

The Model 702GAS uses a gas pilot for ignition of the gas 

main flame. The gas pilot is ignited by the pilot electrode. The 

butterfly gas valve is factory set to a preliminary setting of 30% 

open for low fire, and 100% open for high fire. 

1. 

Make sure the gas line has been completely bled. Then turn the service 

switch to ON. 

2. 

The pilot will usually light the first time once the pilot gas train has been 

completely purged of air.

3. 

The pilot flame is approximately 70 MBH. If the pilot fails to light, be sure 

the gas line has been bled properly. If the primary control is equipped 

with a pilot test hold switch, it can be used to hold the pilot “on” while 

adjusting pilot gas pressure.

4. 

Follow the instructions in the primary control instruction manual to check 

flame signal. Make sure the flame signal is steady, and greater than the 

required minimum for the UV sensor.

5. 

Check and ensure that the bent ignitor (Figure 11) is approximately 

centered in pilot assembly. 

6.  To check static pressure on pilot air, drill a #60 hole in the pilot air tube 

(red circle, Figure 12) and use a manometer for the reading. Pressure 

must be more than .45” w.c.

Step 2

 (firing on gas)

 

Set main gas pressure regulator

 

The butterfly gas valve is factory set to a preliminary setting of 

30% open for low fire, and 100% open for high fire. The pilot 

regulator is set for 3.0 inches w.c. Use manometer in the pilot 

test port (Figure 12) provided to confirm settings.

1. 

Leave the low-fire switch in low fire.

2. 

With the gas pilot operating correctly, and the UV sensor flame signal 

above minimum required, the primary control will cycle the burner to 

main gas.

7.  Adjust the burner using test instruments 

(continued)

 

Check all joints with a soap suds mixture or electronic  

gas leak detector to ensure the gas train and all compo-

nents are tight and leak-free. Shut down the burner and 

correct any leak immediately. Failure to comply could 

result in severe personal injury, death or substantial 

property damage.

3. 

Check the flame signal after the pilot has shut down to ensure the signal 

is still strong with main flame on.

4. 

Move the burner fuel selector switch to 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 downstream pressure tap of the manual gas valve 

next to the butterfly valve.

6. 

The gas pressure at the inlet to the gas train must never exceed 

14 inches w.c., either when the burner is off or firing on gas.

7. 

Move the burner fuel selector switch to GAS. The burner should start.

8. 

With the burner firing in low fire, check the gas pressure at the downstream 

of the butterfly valve. Adjust the main gas pressure regulator if necessary 

until the gas pressure reads 1.0 inch w.c. as a starting pressure.

9. 

Switch the low-fire switch to high fire. CAUTION: Be prepared to turn 

the burner off immediately if it begins to pulsate as it attempts to move 

to high fire.

10. 

If the flame pulsates, it is probably too rich. Switch the low-fire switch to 

low fire and reduce the gas pressure by adjusting the main gas pressure 

regulator. Then return to 9, above.

11. 

If the fire is too lean, it will appear small and can even blow out during the 

swing to high fire. If it blows out, shut off the burner immediately. Switch 

the low-fire switch to low fire and start the burner again. Adjust the main 

gas pressure regulator to increase the gas pressure. Return to 9, above.

    With the burner running in high fire, inspect the buttefly 

valve indicator (Figure 13). The indicator must be at 90°. 

IF NOT, turn the burner off. Loosen the two hex-head 

screws securing the valve linkage arm. With the damper 

motor linkage arm pulled up, use a screwdriver to rotate the 

butterfly valve slot until it is horizontal. Tighten the two hex 

head screws while still holding the damper motor linkage 

arm up. Return to step 9, above. DO NOT proceed with 

combustion adjustment unless the butterfly valve position 

has been verified, and corrected if necessary.

Figure 12 

Pilot Test Port

Figure 11 

Pilot Spark Gap

3/32"-1/8"

Содержание 702GAS

Страница 1: ...maintenance on back page for information regarding operation of this burner The burner Instruction Manual is intended only for your service technician The burner and heat exchanger must be inspected a...

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

Страница 3: ...mply with the latest editions of Installation of Domestic Gas Conversion Burners ANSI Z21 8 National Fuel Gas Code ANSI Z223 1 NFPA 54 National Electrical Code ANSI NFPA 70 All additional applicable n...

Страница 4: ...into the burner through a manifold around the air tube The gas then circulates through a set of four orifice spuds into the air stream upstream of the retention ring The spin of the air flow at the re...

Страница 5: ...0 Btuh of all appliances in the space Do not install or operate the burner if any component is dam aged or if burner does not comply with other guidelines of this manual and the appliance manual Inspe...

Страница 6: ...u facturer s instructions Wire the switch into the appliance limit circuit to shut off the appliance burner if sustained downdraft should occur Refer to the appliance manufacturer s instruction manual...

Страница 7: ...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 operation of the burner un...

Страница 8: ...ications Whenfiringwithpositive overfire pressure do not exceed the pressure specified in the appliance manual Positive overfire pressure reduces maximum burner capacity See Page 3 for estimated reduc...

Страница 9: ...e a floor liner when possible The floor liner will improve firing in most applications Extend floor liner 3 to 4 inches up the side walls 4 Target wall liners Extend target wall liners at least 3 to 4...

Страница 10: ...ance opening so the end of the air tube is flush with or slightly short of the inside surface of the combustion chamber 4 Place gasket onto boiler front plate 5 Slide the end of the air tube into the...

Страница 11: ...enough ventilation to prevent overheating of the appliance burner and controls If there is risk of overheating you must install ventilation air openings sized large enough to provide air for cooling t...

Страница 12: ...e terminal strip inside the gas train J box b See the label in the burner junction box included Gas valve vent opening The V48 diaphragm gas valve is NOT fitted with a vent limiting orifice in the ven...

Страница 13: ...be more than the gas pressure at the burner gas train en trance minus 3 4 w c pressure required at entrance to butterfly valve See Figure 6 for gas train pressure drop information The standard gas tra...

Страница 14: ...990 810 690 620 2 2 750 1 900 1 520 1 300 1 150 2 4 350 3 000 2 400 2 050 1 850 Note 1 For natural gas with specific gravity other than 0 60 consult National Fuel Gas Code for correction factor PROPAN...

Страница 15: ...rmation for burner equipped with a primary control not covered in this manual see Figure 7A for a legend to callouts Turn off power to appliance when servicing burner Failure to comply could result in...

Страница 16: ...steam boiler activated Read the appliance manual for the location of the high fire control when used 3 See Figures 7 and 8 to connect the high fire control to the burner firing rate circuit 4 The burn...

Страница 17: ...nuals and wiring diagrams Gas manifold spud orifices sealed with pipe dope and tight Gas lines in good condition sized and designed correctly Gas line connections and fittings tight Burner appliance a...

Страница 18: ...et air damper linkage Table 5 Initial burner settings see the pages 18 through 22 for final adjustments using test instruments 6 Set burner initial head and damper positions continued 3 4 Determining...

Страница 19: ...e the maximum burner firing rate is reduced The firing rate is also reduced for altitudes higher than 2000 feet above sea level See page 3 for rating information 3 Adjust the burner fuel and air setti...

Страница 20: ...personal injury death or substantial property damage 3 Check the flame signal after the pilot has shut down to ensure the signal is still strong with main flame on 4 Move the burner fuel selector swi...

Страница 21: ...ly valve indicator until it is at 90 Disengage actuator motor Rotate linkage to high fire Tighten the two hex head screws while still holding the motor linkage arm in high fire Rotate linkage to low f...

Страница 22: ...ion with exhaust fans or other conditions operating 7 Adjust the burner using test instruments continued Combustion ventilation air Verify combustion ventilation air openings are not and will not be o...

Страница 23: ...s valves before disconnecting any portion of fuel lines and before cleaning or removing any parts from the burner or related equipment Burner and appliance components can be extremely hot Allow all pa...

Страница 24: ...season and to verify user is aware of proper operation and care of the burner appliance Review proper operation of the appliance burner unit with the user Turn off power to appliance Remove combustion...

Страница 25: ...Btuh Manifold gas pressure IWC High fire Low fire Inlet gas pressure IWC CO2 Gas Low Fire ______ Gas High Fire ______ Gas Low Fire ______ Gas High Fire ______ O2 Were limit controls tested Comments ab...

Страница 26: ...4 Combustion Head Assembly for 702GAS 7 4180002FS Gas Ignitor 8 35824S Motor Contactor 20 AMP R4242B1005 not shown ITEM PART NO DESCRIPTION 9 35311S C7027A1023 UV Scanner 97656S Q7800B1003 Sub Base 99...

Страница 27: ...appliance burner unit NEW PHOTO TO COME ITEM PART NO DESCRIPTION 16 35824S Motor Contactor 20 AMP R4242B1005 19 EMX51UVS EMX51UV KIT includes all of the below 35311S C7027A1023 UV Scanner 97656S Q780...

Страница 28: ...MN702GE 060320 28 10 Dimensions Figure 14 Dimensional data...

Страница 29: ...MN702GE 060320 29 10 Dimensions continued Figure 14A Dimensional data angled gas train...

Страница 30: ...and liquids Do not obstruct 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...

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