Honeywell VR8304 Скачать руководство пользователя

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The VR8300 gas controls provide ON-OFF manual

control of gas flow. In the OFF position, pilot and main

burner gas flow is prevented. In the ON position, pilot and

main burner gas flow is under control of the thermostat, the

intermittent pilot module, and the two automatic main

valves.

SYSTEM OPERATION WITH S8600

When the thermostat calls for heat, the S8600 Inter

mittent Pilot Module is energized. The S8600, in turn,

activates the first automatic valve of the gas control. Pilot

gas flow is allowed. Simultaneously, the S8600 module

generates a spark at the igniter-sensor and lights the pilot.

The pilot flame is sensed by the igniter-sensor, and spark

generation ends.

After the pilot is lit, the S8600 module energizes the

solenoid for the second automatic valve operator and gas

flow main burner is followed (the first automatic valve

remains energized). The second automatic valve dia-

phragm, controlled by the servo pressure regulator, opens

and adjusts gas flow as long as the system is powered and

the pilot is burning. The servo pressure regulator monitors

outlet pressure to provide an even main burner gas flow.

Loss of power (thermostat satisfied) de-energizes the

S8600 module and closes both automatic valves. The

system is ready to return to normal service when power is

restored through the thermostat.

Loss of pilot flame, or flame too small to reliably light

main burner, closes the second automatic valve operator.

The S8600 module then attempts to restart pilot. On S8600

modules with lockout timers, the first automatic valve

closes after the lockout period. On S8600 modules without

lockout timers, the trial for ignition continues indefinitely

and the first automatic valve remains open.

H pilot flame is restarted successfully, main burner is

reopened, and gas flows to main burner as described

above. Gas control operation is described in more detail

below.

SECOND

AUTOMATIC

SERVO

/ PRESSURE

REGULATOR

NOTE, SECOND AUTOMATIC VALVE OPERATOR AND SERVO PRESSURE REGULATOR

SHOWN OUTSIDE GAS CONTROL FOR EASE IN TRACING GAS FLOW.

SLOW-OPENING GAS CONTROL HAS A GAS FLOW RESTRICTOR IN THIS PASSAGE.

12,3958

FIG. 11-POSITION OF GAS CONTROL COMPONENTS DURING THERMOSTAT OFF CYCLE.

68-0108-1

Содержание VR8304

Страница 1: ...ing connections are accessible from top of the control Compact size Straight through body pattern right angle adapters avail able for inlet and outlet Available in 1 2 and 3 4 inch inlet and outlet 1 2 and 3 4 inch straight and angle flanges available Adjustable servo regulator effectively maintains almost constant gas output pressure under wide fluctuations in gas supply pressure Inlet screen inc...

Страница 2: ... instructions sheet STANDARD MODELS MODELS VR8304 Dual Automatic Valve Combination Gas Controls for use in Intermittent Pilot Systems with S86F H S860D S8600F H andS90A B modules See Table 1 for model specifications SUPPLY VOLTAGE 24 Va c 50 60 Hz CURRENT DRAW 0 7 A ELECTRICAL CONNECTIONS 1 4 inch male quick con nects Terminal block color coded orange TYPE OF GAS Separate models available for natu...

Страница 3: ...o 3 MAXIMUM REGULATED CAPACITY 340 feet3 hour 9 6 meter3 hour 370 feet3 hour 10 5 meter3 hour 415 feet3 hour 11 8 meter3 hour acapacity basedon 1000 btu 1eet3 0 64specific gravity naturalgas at 1 inch wc pressure drop 37 3 MJ meter3 0 64 specific gravity natural gas at 0 25 kPa pressure drop Use conversion factors in Table 2 to convert capacities for other gasses TABLE 2 GAS CAPACITY CONVERSION FA...

Страница 4: ...turer s instructions if available otherwise use the instructions provided below 4 APPROVALS AMERICANGASASSOCIATIONDESIGNCERTIFICATE UP 70 69A CANADIAN GAS ASSOCIATION DESIGN CERTIFI CATE UP 70 69A AUSTRALIAN GAS ASSOCIATION Not available DELTA C Not available ACCESSORIES Flanges see Table 3 394349 9 64 inch hex tool for flange assembly screws 393691 Natural to LP gas conversion kit 394588 LP to Na...

Страница 5: ...l in the same location as the old gas control Install Piping to Gas Control All piping must comply with local codes and ordinances or with the National Fuel Gas Code ANSI Z223 1 NFPA No 54 whicheverapplies Tubinginstallationmustcomply with approved standards and practices 1 Use new properly reamed pipe free from chips If tubing is used ensure the ends are square deburred and clean All tubing bends...

Страница 6: ...ITTING BREAKS OFF AND CLINCHES TUBING AS NUT IS TIGHTENED 911B FIG 7 ALWAYS USE NEW COMPRESSION FlmNG 4 Push tubing into the pilot gas tapping on the outlet end of the control until it bottoms While holding tubing all the way in slide compression fitting into place and engage threads turn until finger tight Then tighten one more turn with wrench Do not overtighten Refer to Fig 7 5 Connect other en...

Страница 7: ...VR8304 WIRING CONNECTIONS IN INTERMITTENT IGNITION SYSTEM WITH S86 PV GND VR8304 S8610F H _ VENT 24V DAMPER COMBINATION PV MV GAS CONTROL MV MV PV PV BURNER GND 24V TH W PLUG MV PILOT BURNER GROUND s POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED ALTERNATE LIMIT CONTROLLER LOCATION bi CONTROLS IN 24V CIRCUIT MUST NOT BE IN GROUND LEG TO TRANSFORMER DB0D VENT DAMPER _ REM...

Страница 8: ...t cover screw Refer to Fig 5 8 2 Turn the inner adjustment screw clockwise to decrease or counterclockwise n to increase the pilot flame 3 Alwaysreplace thecover screw after adjustment and tighten firmly to ensure proper operation 3 8 TO 1 2 INCH 10 TO 13 MILLIMETRES IGNITER SENSOR FIG 10 PROPER FLAME ADJUSTMENT CHECK AND ADJUST GAS INPUT TO MAIN BURNER CAUTION 1 Do not exceed the input rating sta...

Страница 9: ...counter clockwise to decrease the main burner gas pressure c Always replace the cap screw and tighten firmly to ensure proper operation 4 If desired outlet pressure or flow rate cannot be achieved by adjusting the gas control check the inlet pressure using a manometer at inlet pressure tap or upstream of thegascontrol If the inlet pressure is in the normal range refer to Table5 or6 replace the exi...

Страница 10: ...er immediately or following prepurge See IP module specifications 4 H module has timed ignition time length of spark operation See IP module specifications 5 After themodulelocksout open gascontrol knoband ensure there is no pilot or main burner gas flow With modules that continue spark until pilot lights or system is shut down manually pilot should light when gas control knob is opened 6 Settherm...

Страница 11: ... and the pilot is burning The servo pressure regulator monitors outlet pressure to provide an even main burner gas flow Loss of power thermostat satisfied de energizes the S8600 module and closes both automatic valves The system is ready to return to normal service when power is restored through the thermostat Loss of pilot flame or flame too small to reliably light main burner closes the second a...

Страница 12: ...f inlet pressure and flow rate vary widely Any outlet pressure change is immediately reflected back to the pressure regulator diaphragm which repositions to change the flow rate through the regulator valve and thus through the automatic valve If outlet pressure begins to rise the pressure regulator diaphragm moves slightly higher allowing less gas flow to the gascontroloutlet This increases gaspre...

Страница 13: ...ure regulator maintains the desired full rate outlet FIRE OR EXPLOSION HAZARD CAN CAUSE PROPERTY DAMAGE SEVERE INJURY OR DEATH Do not disassemble the gas control It contains no replaceable components Attempted disas sembly or repair may damage the gas control 13 pressure as described for the standard regulator The step model requires approximately 60 seconds to reset once the main burner goes off ...

Страница 14: ... any physical damage tampering bent termi nals missingorbrokenparts strippedthreads or evidence of exposure to heat 14 IMPORTANT Follow the operating instructions provided by the manufacturer of your heating appliance The infor mation below will be of assistance in a typical gas control application but the specific controls used and the procedures outlined by the manufacturer or your appliance may...

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