Honeywell VR8405 Manual Download Page 12

68-0150

12

VR8405

SERVICE

IF MAIN BURNER WILL NOT COME ON WITH
CALL FOR HEAT

1. Make sure gas control knobs are in the ON position.
2. Adjust  the  thermostat several degrees above room

temperature.

3. Using an ac voltmeter, measure voltage across MV

leadwires at the gas valve.

4. If no voltage is present, check control circuit for

proper operation.

5. If 24V is present, replace the entire gas control.

INSTRUCTIONS TO THE USER
FOR YOUR SAFETY, READ BEFORE LIGHTING

WARNING

IF YOU DO NOT FOLLOW THE
WARNINGS BELOW AND THE
LIGHTING INSTRUCTIONS EXACTLY,
A FIRE OR EXPLOSION CAN RESULT
WITH PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
Follow these warnings exactly:
1. Before lighting, smell around the appliance for

gas. Be sure to smell next to the floor because
LP gas is heavier than air.

2. IF YOU SMELL GAS:

• Turn off the gas supply at the appliance

service valve. On LP gas systems, turn off
gas supply at the gas tank.

• Do not light any appliances.
• Do not touch electrical switches or use the

phone.

• Leave the building and use a neighbor’s

phone to call your gas supplier.

• If you can not reach your gas supplier, call

the fire department.

3. Do not force the gas control knobs. Use only

your hand to turn the gas control knobs. Never
use any tools. If the gas control knobs will not
operate by hand, call a qualified service techni-
cian to replace the entire gas control. Force or
attempted repair can result in fire or explosion.

4. Call a qualified service technician to replace the

entire gas control if it has been flooded with
water.

5. Replace the entire gas control in the event of

any physical damage, tampering, bent termi-
nals, missing or broken parts, stripped threads,
or evidence of exposure to heat.

IMPORTANT:  Follow the operating instructions pro-

vided by the manufacturer of your heating appliance.
The information below will be of assistance in a
typical control application, but the specific controls
used and the procedures outlined by the manufac-
turer of your appliance may differ, and require special
instructions.

TO TURN ON THE APPLIANCE
STOP: READ THE WARNING ABOVE

The lighting sequence of this appliance is automatic. Do

not attempt to manually light the main burner. If the appli-
ance does not turn on when the thermostat is set several
degrees above room temperature, follow these instructions:

1. Set the thermostat to its lowest setting to reset the

safety control.

2. Disconnect all electric power to the appliance.
3. Remove the gas control access panel.
4. Turn both of the gas control knobs clockwise

to OFF.

5. Wait five minutes to clear any unburned gas. If you

then smell gas, STOP! Follow step 2 in the Warning in the
Instructions To The User section. If you do not smell gas,
continue with the next step.

6. Turn both of the gas control knobs counterclock-

wise

to ON.

7. Replace the gas control access panel.
8. Reconnect all electric power to the appliance.
9. Set the thermostat to the desired setting.

10. If the appliance does not turn on, set the gas control

knobs to OFF, turn off the upstream appliance valve, and
contact a qualified service technician for assistance.

TURNING OFF THE APPLIANCE
VACATION SHUTDOWN: Set the thermostat to the de-

sired room temperature while you are away.

COMPLETE APPLIANCE SHUTDOWN: Turn both gas

control knobs clockwise

to OFF. Do not force.

Turn off the upstream appliance valve and disconnect
the power supply. Appliance will be completely shut
off.

To resume normal operation, turn on the upstream

appliance valve and connect the power supply; then follow
the procedure above.

QUALITY IS KEY

Home and Building Control

Home and Building Control

Helping You Control Your World

Honeywell Inc.

Honeywell Limited—Honeywell Limitée

1985 Douglas Drive North

740 Ellesmere Road

Golden Valley, MN 55422

Scarborough, Ontario
M1P 2V9

Printed in U.S.A.

Summary of Contents for VR8405

Page 1: ...t3 hour 20 3 meters3 hour Minimum capacity rated 200 feet3 hour 5 7 meters3 hour Solenoid operated dual first automatic valves open on thermostat call for heat and close when call for heat ends Diaphragm operatedsecondautomaticvalvesopen under control of the regulator and close if gas or power supply is interrupted Two position gas control knobs have ON and OFF positions All adjustments and wiring...

Page 2: ...e ordering number or specify 1 Order Number 2 Natural or LP gas 3 Step pressure on VR8405P 4 Accessories is desired 5 Order separately transformer igniter sensor module limit controller and thermostat or controller as required If you have additional questions need further information or would like to comment on our products or services please write or phone 1 Your local Honeywell Home and Building...

Page 3: ...ravity natural gas at 0 25 kPa pressure drop PRESSURE REGULATION Not adjustable DIMENSIONS See Fig 1 TEMPERATURE RATING VR8405H 0 F to 175 F 18 C to 79 C VR8405M P 40 F to 175 F 40 C to 79 C PRESSURE TAPPING Inlet and outlet taps standard Taps accessible from top of control Tap is 1 8 in NPT with plug containing recess for 3 16 in Allen wrench PRESSURE RATING AGA rating 1 2 psi 3 5 kPa inlet press...

Page 4: ...e appliance manufacturer instructions if avail able otherwise use the instructions provided below INSTALL BUSHINGS ON ENTIRE GAS CONTROL 1 Remove seals over gas control inlet or outlet 2 Apply moderate amount of good quality pipe com pound to bushing leaving two end threads bare On an LP gas installation use compound resistant to LP gas See Fig 3 Do not use Teflon tape 3 Insert bushing in entire g...

Page 5: ...ENGTH IN IN Pipe Size Thread Pipe This Amount Maximum Depth Pipe Can Be Inserted Into Control 3 4 13 16 3 4 1 1 1 16 1 5 Remove seals over gas control inlet and outlet if necessary 6 Connect pipe to gas control inlet and outlet Use a wrench on the manifold rather than on the gas control Refer to Figs 4 and 5 WIRING Follow the wiring instructions furnished by the appli ance manufacturer if availabl...

Page 6: ... VALVE GND TEMPERATURE CONTROLLER POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED ALTERNATE LIMIT CONTROLLER LOCATION MAXIMUM IGNITER SENSOR CABLE LENGTH 3 ft 9 m OR LESS 3 A REPLACEABLE FUSE ALARM TERMINAL PROVIDED ON SOME MODELS M8051 MVPV MVPV L1 HOT L2 1 2 1 2 3 VR8405 COMBINATION GAS CONTROL Q347 IGNITER SENSOR BURNER 4 4 5 IGNITER SENSOR AND BURNER GROUND 3 5 ALARM ...

Page 7: ... leak is detected tighten the pipe connection 3 Stand clear while lighting main burner to prevent injury caused from hidden gas leaks that could cause flash back in the appliance vestibule Turn on the entire gas control and light the main burner as described below 4 With the main burner in operation paint all pipe joints and gas control inlet and outlet with a rich soap and water solution 5 Ifanot...

Page 8: ...ustable Step Opening Pressure Regulator 1 The gas control outlet pressure should match the manifold pressure listed on the appliance nameplate 2 With the main burner operating check the gas con trol flow rate using the meter clocking method 3 If desired flow rate is not as stamped on the control check the inlet pressure using a manometer at inlet pres sure tap or upstream of the gas control Regula...

Page 9: ...nce these environments can cause the gas control to deteriorate more rapidly the system should be checked more often If the gas controls will be exposed to high ammonia conditions e g those used in greenhouses or animal barns contact your Honeywell sales representative to request a gas control with corrosion resistant construction The entire gas control should be replaced if It does not perform pr...

Page 10: ... 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 gas control outlet This increases gas pressure under the automatic valve diaphragm and repositions the valve disc closer to the seat Thus flow of gas through the second automatic ...

Page 11: ...operators close bypassing the regulator s and shutting off the main burner As pres sure inside the gas controls and underneath the automatic valvediaphragmsequalize springpressureclosesthesecond automatic valves to provide a second barrier to gas flow Fig 9 Position of gas control components during burner on cycle Both valves are positioned the same one valve shown for simplicity two main valves a...

Page 12: ...appliance The information below will be of assistance in a typical control application but the specific controls used and the procedures outlined by the manufac turer of your appliance may differ and require special instructions TO TURN ON THE APPLIANCE STOP READ THE WARNING ABOVE The lighting sequence of this appliance is automatic Do not attempt to manually light the main burner If the appli anc...

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