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Intermittent Pilot Dual Automatic
Valve Combination Gas Controls
The VR8204 AND VR4204 Intermittent Pilot
Dual Automatic Valve Combination Gas Controls
are used in gas-fired, intermittent pilot appli-
ances. The controls include a safety shutoff, a
manual valve, two automatic operators, a pres-
sure regulator, a pilot adjustment screw and a
conduit cover (VR4204 only).
VR8204 used with S8600, S8610 and S8620 Control
Modules.
VR4204 used with 120 Vac intermittent ignition mod-
ules.
VR8204 for use with 24 Vac heating appliances and
VR4204 for use with 120 Vac heating appliances that
burn natural or manufactured gas, or liquified petroleum
(LP) gas.
Capacity rated at 150 cfh at 1 in. wc pressure drop
3
[4.2 m
/hr at 0.25 kPa].
Solenoid-operated first automatic valve opens on ther-
mostat call for heat and closes when call for heat ends.
Diaphragm-operated second automatic valve opens un-
der control of the regulator and closes if gas or power
supply is interrupted.
Two-position gas control knob has ON and OFF posi-
tions.
All adjustments and wiring connections are accessible
from top of the control.
Compact size.
Straight-through body pattern; right angle adapters avail-
able for inlet and outlet.
1/2 in. inlet and 1/2 in. outlet; adapters available for 3/8
or 3/4 in.
VR8204; VR4204
Adjustable servo regulator effectively maintains almost
constant gas output pressure under wide fluctuations in
gas supply pressure.
Inlet and outlet screens included.
Pilot filter included.
Wiring terminal block color-coded orange to indicate
intermittent pilot control.
May be installed at any angle between 0 and 90 degrees
from the upright position, including vertically.
1/4 in. male quick-connect terminals for electrical con-
nections.
0° F to 175 F° [-18° C to +79° C] temperature range
standard; -40° F to 175° F [-40° C to +79° C] available.
lnlet and outlet pressure taps provided; both taps acces-
sible from top of control.
Standard-, slow- and step-opening models available.
CONTENTS
Specifications ............................................... 2
Ordering Information .................................. 2
Installation ................................................... 4
Startup and Checkout .................................. 8
Maintenance .............................................. 10
Operation ................................................... 10
Service ........................................................ 13
G. S. • Rev. 1-94 • ©Honeywell Inc. 1994 • Form Number 68-0047-2
1
68-0047-2
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Related Manuals for Honeywell VR8204C
Summarization of Contents
Specifications and Ordering Information
TRADELINE® Models Specifications
Details about TRADELINE® models for ease of stocking, handling, and maximum replacement value.
Standard Models Specifications
Details about standard VR8204 and VR4204 Dual Automatic Valve Combination Gas Controls.
Ordering Information
Guidance on how to purchase replacement and modernization products, including specifying part numbers.
Installation Procedures
General Installation Warnings and Precautions
Key safety warnings and precautions to follow during installation, including electrical and gas safety.
Converting Between Natural and LP Gas
Procedure and requirements for converting the gas control between natural and LP gas.
Installing Adapters to Control
Instructions for mounting flanges and bushings to the gas control for proper connection.
Location and Mounting Requirements
Guidelines for selecting a suitable location and mounting the gas control.
Piping and Control Installation
Procedures for installing gas piping and connecting the control to the system.
Connecting Pilot Gas Tubing
Step-by-step guide for connecting the pilot gas tubing to the control.
Wiring Connections
Detailed instructions and diagrams for making electrical wiring connections for 24V and 120V systems.
Startup and Checkout Procedures
Gas Control Knob Settings and System Startup
Explains control knob positions and initial system turn-on procedures.
Performing Gas Leak Test
Essential safety procedure to check for gas leaks after installation or service.
Adjusting Pilot Flame
Guide on how to properly adjust the pilot flame for optimal ignition.
Safety Shutdown Performance Test
Critical test to ensure the safety shutdown mechanism functions correctly.
Gas Input and Burner Ignition Adjustment
Procedures for checking and adjusting gas input and burner ignition.
Pressure Regulator Adjustment
Instructions for adjusting the pressure regulator to match appliance ratings.
Maintenance and Operation
Maintenance Importance and Frequency
Explains why maintenance is important and factors influencing its frequency.
System Operation with Module
Describes the sequence of operation when the thermostat calls for heat and the pilot ignition module is used.
Valve Positions and States
Details valve positions during thermostat off cycles and when calling for heat.
Regulation Modes
Explains standard, slow-opening, and step-opening regulation modes.
End of Call for Heat Sequence
Describes the process and valve actions when the call for heat ends.
Service and Troubleshooting
Service Warnings and Precautions
Critical safety warnings and cautions to observe before and during service.
Troubleshooting: No Main Burner Operation
Steps to diagnose and resolve issues when the main burner fails to operate.
Homeowner Operating Instructions
Homeowner Safety Warnings
Essential safety guidelines for homeowners before operating the appliance.
Furnace Turn On Procedure
Step-by-step instructions for homeowners to turn on the furnace.
Appliance Turn Off Procedure
Instructions for homeowners to completely shut off the appliance.
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