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Honeywell VR8345M Manual

Universal electronic ignition gas control.
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Universal Electronic Ignition
The VR8345M Universal Electronic Ignition
Gas Control is used in gas-fired appliances with
capacities up to 300 cu ft/hour at 1 inch wc pres-
sure drop [8.5 cu m/hour at 0.25 kPa] for natural
gas. The VR8345M will operate with a direct spark
ignition (DSI), hot surface ignition (HSI) or inter-
mittent pilot ignition. The control includes a
manual valve, two automatic operators, a pres-
sure regulator, pilot adjustment, pilot plug, and
ignition adapter.
Compatible with hot surface pilot, intermittent pilot
and direct spark ignition.
Replaces virtually any IP, HSI or DSI gas control.
For use with 24 Vac heating appliances that burn
natural or manufactured gas or liquiefied petroleum
(LP) gas. (Includes converter kit to adapt from natu-
ral gas to LP gas.)
Compact to fit into tightly packed, high efficiency
heating equipment.
Works with virtually all residential equipment and
all but the largest commercial equipment, with a
regulation capacity range of 30,000 to 415,000 Btuh
natural gas (48,600 to 672,300 LP gas).
All adjustments and wiring connections accessible
from top of control.
Straight-through body pattern.
1/8 in. NPT inlet and outlet taps on top of gas
control aid adjustment of gas pressure in problem
installations.
3/4 in. x 3/4 in. inlet and outlet fit easily on high
capacity systems plus others using 1/2 in. reducer
bushings.
R.R. • 3-95 • ©Honeywell Inc. 1995
VR8345M
Gas Control
4.0 in. swing radius allows easy rotation into position
inside the tightest furnace vestibules.
Can be installed at any angle including vertically be-
tween 0 and 90 degrees from the upright position.
Clearly marked, keyed termianl block allows quick
attachment of wires and IP/DSI/HSI jumper. Keyed
jumper cannot be incorrectly inserted.
Internal inlet screen blocks contaminants in gas line
from entering valve.
-40°F to +175°F (-40°C to +79°C) temperature range
standard.
Standard opening.
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Installation ..................................................... 3
Startup and Checkout ................................... 11
Maintenance ................................................. 13
Operation ..................................................... 14
Service .......................................................... 17
1
68-0160
68-0160

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Table of Contents

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   Summary of Contents for Honeywell VR8345M

  • Page 1: Table Of Contents

    300 cu ft/hour at 1 inch wc pres- sure drop [8.5 cu m/hour at 0.25 kPa] for natural gas. The VR8345M will operate with a direct spark ignition (DSI), hot surface ignition (HSI) or inter- mittent pilot ignition. The control includes a...
  • Page 2: Specifications

    Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 (612) 951-1000 In Canada—Honeywell Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P2V9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
  • Page 3: Installation

    VR8345M INSTALLATION Installation WHEN INSTALLING THIS PRODUCT… WARNING 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condi- FIRE OR EXPLOSION HAZARD tion. CAN CAUSE PROPERTY DAMAGE, 2. Check the ratings given in the instructions and on the...
  • Page 4 VR8345M INSTALLATION TABLE 3—VR8345 REPLACES THESE GAS CONTROLS (Continued). Replacement Gas Controls Universal Old Model No. Manufacturer VR8200 VR8300 VR800 Replacement V4227A1000 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302 V4227A1018 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302 V4227B1008 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302 V4227B1016...
  • Page 5 VR8345M INSTALLATION TABLE 3—VR8345 REPLACES THESE GAS CONTROLS (Continued). Replacement Gas Controls Universal Old Model No. Manufacturer VR8200 VR8300 VR800 Replacement VR8204A2092 HONEYWELL VR8204A2076 — — VR8345M4302 VR8204A2100 HONEYWELL VR8204A2076 — — VR8345M4302 VR8204A2118 HONEYWELL VR8204A2076 — — VR8345M4302 VR8204A2126...
  • Page 6 Regulator setting on replacement valve differs from original. Adjust to rated pressure as necessary for optimum performance. Shipped by Honeywell as LP gas only; may have been converted to natural gas by OEM. Use with 1/8 in. compression fitting, part no. 3934014-1.
  • Page 7 VR8345M INSTALLATION Bushings 3. Thread pipe the amount shown in Table 4 for insertion 1. Remove seal over gas control inlet or outlet. into the gas control. 2. Apply moderate amount of good quality pipe com- pound to bushing, leaving two end threads bare. See Fig. 2.
  • Page 8 VR8345M INSTALLATION When working with an intermittent pilot ignition sys- 3. Square off and remove burrs from end of tubing. tem, go next to the Connect Pilot Gas Tubing section. 4. Use the compression fitting supplied with this gas When installing on a hot surface or direct spark ignition control.
  • Page 9 VR8345M INSTALLATION WIRING All wiring, including insulated quick connect terminals, must comply with applicable electrical codes and ordinances. CAUTION 1. Check the power supply rating on the gas control and make sure it matches the available supply. Install thermostat Disconnect power supply before making wiring and other controls as required.
  • Page 10 VR8345M INSTALLATION Fig. 9—VR8345 wiring connections in intermittent ignition system. S8610U VENT DAMPER (BURNER) MV MV/PV PV 24V TH-W SENSE SPARK PLUG MV/PV PROVING THERMOSTAT SWITCH VR8345 DUAL VALVE COMBINATION GAS CONTROL COMBUSTION AIR BLOWER RELAY SENSOR LIMIT CONTROLLER IGNITER...
  • Page 11: Startup And Checkout

    VR8345M INSTALLATION • STARTUP AND CHECKOUT Fig. 11—VR8345 wiring connections in direct spark ignition system (single rod application). (HOT) S87 CONTROL MODULE ALARM, IF USED DSI WIRE ADAPTER ALARM 24V (GND) VALVE VALVE VR8345 COMBINATION GAS CONTROL QUICK CONNECTS IGNITER-SENSOR AND...
  • Page 12 VR8345M STARTUP AND CHECKOUT CHECK AND ADJUST GAS INPUT TO MAIN CAUTION BURNER Stand clear while lighting main burner to prevent CAUTION injury caused from hidden gas leaks that could cause flashback in the appliance vestibule. 1. Do not exceed the input rating stamped on the...
  • Page 13: Maintenance

    • Exposure to water, dirt, chemicals and heat can dam- barns, contact your Honeywell sales representative to age the gas control and shut down the control system. request a gas control with corrosion resistant construction.
  • Page 14: Operation

    VR8345M MAINTENANCE • OPERATION The gas control should be replaced if: • The gas control knob is hard to turn or push down. • It does not perform properly during checkout or • The gas control is likely to have operated for more than troubleshooting.
  • Page 15 VR8345M OPERATION side of thesecond automatic valve diaphragm. The combi- immediately reflected back to the pressure regulator dia- nation of spring pressure under the second automatic valve phragm, which repositions to change the flow rate through diaphragm andd alck of outlet pressure hold the diaphragm the regulator and, thus, through the automatic valve.
  • Page 16 VR8345M OPERATION Fig. 14—Direct Ignition/Intermittent Pilot Applications: Position of gas control components during burner on cycle. CONTROL SECOND AUTOMATIC SECOND KNOB VALVE OPERATOR AUTOMATIC OPERATOR SOLENOID SERVO PRESSURE REGULATOR FIRST AUTOMATIC VALVE SOLENOID SECOND AUTOMATIC OPERATOR VALVE DISC PILOT OUTLET...
  • Page 17: Service

    VR8345M SERVICE Service 3. Using an ac voltmeter, check for voltage at the gas WARNING control. • Intermittent Pilot Igntion—If pilot lights, measure FIRE OR EXPLOSION HAZARD voltage across MV/PV and MV. If pilot does not light, CAN CAUSE PROPERTY DAMAGE,...
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  • Page 20 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 QUALITY IS KEY Printed on recycled paper containing at 68-0160 Printed in U.S.A.

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  • #unknown Dec 20, 2017 07:24:
    Educationa​l material for the contractor​s benefits
    because customers need addition comfort. R N Q