Honeywell TRADELINE VR8345M User manual

168-0160
VR8345M
Universal Electronic Ignition
Gas Control
68-0160
R.R. • 3-95 • ©Honeywell Inc. 1995
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.TheVR8345Mwilloperatewithadirectspark
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.
■4.0in.swingradiusallowseasyrotationintoposition
inside the tightest furnace vestibules.
■Canbeinstalledat any angle includingverticallybe-
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°Fto+175°F(-40°Cto+79°C)temperaturerange
standard.
■Standard opening.
CONTENTS
Specifications .................................................2
Ordering Information.....................................2
Installation .....................................................3
Startup and Checkout ................................... 11
Maintenance .................................................13
Operation .....................................................14
Service ..........................................................17

68-0160 2
VR8345M
SPECIFICATIONS • ORDERING INFORMATION
Specifications
Ordering Information
When purchasing replacement and modernization products from your TRADELINE®wholesaler or distributor, refer to the TRADELINE®
Catalog or price sheets for complete ordering number, or specify—
1. Order number.
2. Ordered separately; pilot burner, igniter-sensor, transformer, 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 Home and Building Control Sales Office (please check the white pages of your phone directory).
2. Home and Building Control Customer Logistics
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 [phone]
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.
IMPORTANT: Thespecifications given in this publication
do not include normal manufacturing tolerances.
Therefore, this unit may not exactly match the listed
specification. Also, this product is tested and cali-
brated under closely controlled conditions, and some
minor differences in performance can be expected if
those conditions are changed.
MODEL: VR8345M Universal Combination Gas Control.
AMBIENT TEMPERATURE RANGE: -40°to +175°F
(-40°to +79°C).
BODY PATTERN: Straight-through.
REGULATOR TYPE: Standard opening.
INLET X OUTLET SIZE: 3/4 x 3/4 inch.
IGNITION ADAPTER: Configures VR8345M to operate
with direct spark or hot surface ignition.
ELECTRICAL RATINGS:
Voltage and Frequency: 24 Vac, 60 Hz.
Current Draw: 0.7A.
CAPACITY: See Table 1.
UseconversionfactorsinTable2toconvertcapacitiesfor
other gases.
TABLE 1—GAS CAPACITY.
Size
(Inlet x Outlet)
Capacity (at 1 inch
wc pressure drop)aMinimum Regulated Capacity
Maximum
Regulated Capacity
3/4 x 3/4 300 feet3/hr
(8.5 meter3/hr) 30 feet3/hr (0.8 meter3/hr) 415 feet3/hr (11.8 meter3/hr)
aCapacity based on 1000 Btu/cu ft, 0.64 specific gravity natural gas at 1 in. wc pressure drop (37.3 MJ/cu m, 0.64 specific
gravity natural gas at 0.25 kPa pressure drop).
TABLE2—GASCAPACITYCONVERSIONFACTORS.
Gas
Specific
Gravity
Multiply Listed
Capacity By
Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.620
APPROVALS:
AmericanGasAssociationDesignCertificate:L2025007.
CanadianGasAssociationDesignCertificate:L2025007.
PIPE ADAPTERS: Includes two 3/4 to 1/2 inch NPT bush-
ings and one 1/2 to 3/8 inch NPT bushing.
CROSS REFERENCE: See Table 3 for cross reference
information.
Fig. 1—VR8345 dimensions in in. (mm).
M7449
315
16
17
16
11
16
2 (69)
1
(25)
1
2
(13)
4 in. (102)
SWING
RADIUS
1/4 in. QUICK-
CONNECT
TERMINALS
1 (25)
1
2(13)
1
16
4 (104)
MV
MV
PV
PV
(36)
(99)

368-0160
VR8345M
INSTALLATION
Installation
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous condi-
tion.
2. Check the ratings given in the instructions and on the
productto makesurethe productissuitable foryourapplica-
tion.
3. The installer must be a trained, experienced service
technician.
4. Afterinstallation iscomplete, usethese instructionsto
check out product operation.
IMPORTANT: Itisrecommendedthatanapplianceshutoff
valve be installed upstream of the VR8435M.
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Follow these warnings exactly:
1. Disconnect power supply before wiring to pre-
vent electrical shock or equipment damage.
2. To avoid dangerous accumulation of fuel gas,
turn off gas supply at the appliance service
valve before starting installation, and perform
Gas Leak Test after completing installation.
3. Whenworking witha systemusing intermittent
pilot ignition, do not bend pilot tubing at gas
control or pilot burner after compression fitting
has been tightened because gas leakage at the
connection can result.
4. Always install sediment trap in gas supply line
to prevent contamination of gas control.
5. Donotforcethegascontrolknob.Useonlyyour
handtoturnthegas controlknob.Never useany
tools.Ifthegascontrolknobdoesnotoperateby
hand, call a qualified service technician to re-
place the gas control. Force or attempted repair
can result in fire or explosion.
TABLE 3—VR8345 REPLACES THESE GAS CONTROLS.
(Continued)
Replacement Gas Controls Universal
Old Model No. Manufacturer VR8200 VR8300 VR800 Replacement
36E36-304 DSI/HSI WHITE RODGERS VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
36E36-304 IP WHITE RODGERS VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
720-050 ROBERTSHAW VR8205A2024 VR8305M3506 — VR8345M4302
a
720-051 ROBERTSHAW VR8205A2024 VR8305M3506 — VR8345M4302
a
720-070 ROBERTSHAW VR8204A2076 VR8304A3509 — VR8345M4302
V4185A1000 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M3402
a,b
V4185A1010 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4185B1008 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4185B1016 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4185B1024 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225A1002 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225A1028 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225A1044 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225A1051 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225A1077 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225B1000 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225B1018 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4225B1026 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
(Footnotes at end of table).

68-0160 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
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4227A1018 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4227B1008 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4227B1016 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4249A1004 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4249A1012 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4249A1020 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1005 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1013 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1021 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1039 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1047 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4297A1054 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4298A1004 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V4298A1012 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V445A1009 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V445A1017 HONEYWELL VR8205A2024 VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
V8185A1001 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
V8185A1019 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
V8185A1035 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
V8185B1009 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
V8185B1017 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
V8247A1000 HONEYWELL VR8205A2024 VR8305A3506 VR8450A4113 VR8345M4302
a
V8247B1005 HONEYWELL VR8205A2024 VR8305A3506 VR8450A4113 VR8345M4302
a
V845A1018 HONEYWELL VR8205A2024 VR8305A3506 VR8450A4113 VR8345M4302
a
V845A1026 HONEYWELL VR8205A2024
c
VR8305A3506 VR8450A4113
c
VR8345M4302
a,c
V845A1034
d
HONEYWELL VR8205A2024 VR8305A3506 VR8450A4113 VR8345M4302
a
V845A1133
d
HONEYWELL VR8205A2024 VR8305A3506 VR8450A4113 VR8345M4302
a
VR4450M2035 HONEYWELL VR8205A2024
b
VR8305A3506
b
VR8450A4113
b
VR8345M4302
a,b
VR4450M2126 HONEYWELL VR8205A2024
b
VR8305A3506
b
VR8450A4113
b
VR8345M4302
a,b
VR4450M2159
d
HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
VR445M1009 HONEYWELL VR8205A2024
b
VR8305M3506
b
VR8450A4113
b
VR8345M4302
a,b
VR445M1017
d
HONEYWELL VR8205A2024
b,c
VR8305M3506
b,c
VR8450A4113
b,c
VR8345M4302
a,b,c
VR8204A2032 HONEYWELL — — — VR8345M4302
VR8204A2001 HONEYWELL VR8204A2076 — — VR8345M4302
VR8204A2027 HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2035 HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2043
d
HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2050 HONEYWELL VR8204A2076 — — VR8345M4302
VR8204A2068
d
HONEYWELL VR8204A2076 — — VR8345M4302
VR8204A2076 HONEYWELL VR8204A2076 — — VR8345M4302
(Footnotes at end of table). (Continued)

568-0160
VR8345M
INSTALLATION
TABLE 3—VR8345 REPLACES THESE GAS CONTROLS (Continued).
Replacement Gas Controls Universal
Old Model No. Manufacturer VR8200 VR8300 VR800 Replacement
VR8204A2092
d
HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2100 HONEYWELL VR8204A2076
e
——VR8345M4302
e
VR8204A2118 HONEYWELL VR8204A2076
e,f
——VR8345M4302
e,f
VR8204A2126 HONEYWELL VR8204A2076 — — VR8345M4302
VR8204A2134 HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2142 HONEYWELL VR8204A2076 — — VR8345M4302
VR8204A2167
d
HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8204A2175 HONEYWELL VR8204A2076
c
——VR8345M4302
c
VR8205A2008 HONEYWELL VR8205A2024 — — VR8345M4302
a
VR8205A2016
d
HONEYWELL VR8205A2024
c
——VR8345M4302
a,c
VR8205A2024 HONEYWELL VR8205A2024 — — VR8345M4302
a
VR8205A2073 HONEYWELL VR8205A2024
e
——VR8345M4302
a,c
VR8440A2001 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440A2019
d
HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440A2050 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440A2076 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440A2084 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440A2092 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440A2100 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440A2118 HONEYWELL VR8204A2076
e
VR8304M3509 VR8440A3025
e
VR8345M4302
e
VR8440A2134 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440A2142 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M1000 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2008 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2016 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440M2024 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2032
d
HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2040
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440M2057 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2065 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440M2073 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR8440M2081
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8440M2099 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844A1002 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844A1028
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844A1051 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844A1085 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1006 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1014 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1063 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1162 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
(Footnotes at end of table). (Continued)

68-0160 6
VR8345M
INSTALLATION
TABLE 3—VR8345 REPLACES THESE GAS CONTROLS (Continued).
Replacement Gas Controls Universal
Old Model No. Manufacturer VR8200 VR8300 VR800 Replacement
VR844M1170 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1188
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844M1196
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844M1220
d
HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1246 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844M1287
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844M1295 HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR844N1003 HONEYWELL VR8204A2076 VR8304M3509 VR8440A3025 VR8345M4302
VR844R1005
d
HONEYWELL VR8204A2076
c
VR8304M3509 VR8440A3025
c
VR8345M4302
c
VR8450A2000 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
VR8450A2109 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
VR8450A2117
d
HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
VR8450M2023 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
VR8450M2064 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
VR8450R6003 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
VR845M1013 HONEYWELL VR8205A2024 VR8305M3506 VR8450A4113 VR8345M4302
a
aDirect ignition application.
bRequires Honeywell AT40 or AT72 transformer.
cRegulator setting on replacement valve differs from original. Adjust to rated pressure as necessary for optimum performance.
dShipped by Honeywell as LP gas only; may have been converted to natural gas by OEM.
eUse with 1/8 in. compression fitting, part no. 3934014-1.
fUse with 3/4 in. angle flange, part no. 393690-15 .
gRequires 1/2 in. straight flange (part no. 393690—16) or an angle flange (part no. 393690—13).
CAUTION
Never apply a jumper across or short the valve coil
terminals. This can burn out the heat anticipator in
the thermostat or damage the electronic intermit-
tent pilot (IP) module.
IMPORTANT:These gas controls are shipped with pro-
tective seals over inlet and outlet tappings. Do not
remove seals until ready to connect piping.
Follow the appliance manufacturer instructions if avail-
able; otherwise, use the following instructions.
CONVERT BETWEEN NATURAL AND LP GAS
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Do not attempt to use a gas control set for natural
gas on LP gas or a gas control set for LP gas on
natural gas.
Convert standard-opening gas controls from natural gas
to LP gas with the conversion kit included with this
TRADELINE® gas control. Part number 393691 converts
from natural to LP gas. Part number 394588 converts from
LP to natural gas.
USE PIPE ADAPTER TO SOLVE SWING RADIUS
PROBLEMS
In some field service applications, space limitations
makeit difficultorimpossible tothreadthe gascontrolonto
the gas supply pipe. This problem can be resolved for many
installationsby usingapipeadapter. Installthepipe adapter
on the end of the supply pipe in place of the gas control by
following the same precautions and instructions that are
used for installing the gas control. After the pipe adapter is
installed, attach the gas control to the adapter as outlined in
the Install Pipe Adapter to Gas Control section.
NOTE: Using a pipe adapter increases the overall length of
the gas control.
INSTALL PIPE ADAPTER TO GAS CONTROL
Install adapter to gas control as follows:

768-0160
VR8345M
INSTALLATION
Bushings
1. Remove seal over gas control inlet or outlet.
2. Apply moderate amount of good quality pipe com-
pound to bushing, leaving two end threads bare. See Fig. 2.
3. Insert bushing in gas control and carefully thread pipe
into the bushing until tight.
Fig. 2—Use moderate amount of pipe com-
pound.
3. ThreadpipetheamountshowninTable4 forinsertion
into the gas control.
TABLE 4—NPT PIPE THREAD LENGTH IN INCHES.
TWO IMPERFECT
THREADS GAS CONTROL
THREAD PIPE THE AMOUNT
SHOWN IN TABLE 4 FOR
INSERTION INTO GAS CONTROL
APPLY A MODERATE AMOUNT OF
PIPE COMPOUND TO PIPE ONLY
(LEAVE TWO END THREADS BARE).
M3075A
PIPE
LOCATION
Locate the combination gas control in the appliance
vestibule on the gas manifold. In replacement applications,
locatethegascontrol inthe samelocationastheold control.
Do not locate the gas control where it can be affected by
steam cleaning, high humidity, dripping water, corrosive
chemicals, dust or grease accumulation, or excessive heat.
For proper operation, follow these guidelines:
•Locate gas control in a well-ventilated area.
•Mount gas control high enough above the cabinet bot-
tom to avoid exposure to flooding or splashing water.
•Make sure the ambient temperature does not exceed
the ambient temperature ratings for each component.
•Cover gas control when the appliance is cleaned with
water, steam, or chemicals or to avoid dust and grease
accumulation.
•Avoid locating gas control where exposure to corro-
sive chemical fumes or dripping water is possible.
INSTALL PIPING TO GAS CONTROL
All piping must comply with applicable codes and ordi-
nances or with the National Fuel Gas Code (ANSI Z223.1
NFPA No. 54), whichever applies. Tubing installation
must comply with approved standards and practices.
1. Use new, properly reamed pipe free from chips. If
tubing is used, make sure the ends are square, deburred and
clean. Make sure all tubing bends are smooth and without
deformation.
2. Run pipe or tubing to the gas control. If tubing is used,
obtain a tube-to-pipe coupling to connect the tubing to the
gas control.
3. Install sediment trap in the supply line to the gas
control. See Fig. 3.
INSTALL GAS CONTROL
1. This gas control can be mounted from 0 to 90 degrees
in any direction from the vertical position of the gas control
knob.
2. Mountthe gas controlso gasflow isin the directionof
the arrow on the bottom of the gas control.
Pipe
Size
Thread Pipe
This Amount
Maximum Depth
Pipe can be
Inserted into
Control
3/8 9/16 3/8
1/2 3/4 1/2
3/4 13/16 3/4
IMPORTANT: Donotthreadpipe toofar. Valvedistortion
ormalfunction canresultwhen thepipeis insertedtoo
deeply into the gas control.
Fig. 3—Install sediment trap.
GAS
CONTROL
GAS
CONTROL
HORIZONTAL
DROP
PIPED
GAS
SUPPLY
PIPED
GAS
SUPPLY
3 in.
(76 mm)
MINIMUM
3 in.
(76 mm)
MINIMUM
3 in.
(76 mm)
MINIMUM
RISER
GAS
CONTROL
TUBING
GAS
SUPPLY
HORIZONTAL
DROP
RISER
M8435
2
1
2
2
1
2
ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
CAUTION: SHUT OFF THE MAIN GAS SUPPLY
BEFORE REMOVING END CAP TO PREVENT
GAS FROM FILLING THE WORK AREA. TEST
FOR GAS LEAKAGE WHEN INSTALLATION
IS COMPLETE.
4. Apply a moderate amount of good quality pipe com-
pound (do not use Teflon tape) to pipe only, leaving two end
threads bare. See Fig. 2. On LP installations, use compound
resistant to LP gas.
5. Remove seals over gas control inlet and outlet if
necessary.
6. Connect pipe to gas control inlet and outlet. Use
wrench on the square ends of the gas control. See Fig. 4
and 5.

68-0160 8
VR8345M
INSTALLATION
When working with an intermittent pilot ignition sys-
tem, go next to the Connect Pilot Gas Tubing section.
When installing on a hot surface or direct spark ignition
system, go to the Wiring section.
Fig. 4—Top view of gas control.
3. Square off and remove burrs from end of tubing.
4. Use the compression fitting supplied with this gas
control. Slip the fitting over the tubing and slide out of the
way.
NOTE: When replacing a gas control, cut off old compres-
sion fitting and replace with the new compression fitting
provided on the gas control. Never use the old compres-
sion fitting because it may not provide a gas-tight seal.
5. Pushtubing intothe pilotgas tappingon theoutlet end
of the control until it bottoms. While holding tubing all the
way in, slide compression fitting into place, engage threads
and turn until finger tight. Then tighten one more turn with
wrench. Do not overtighten. Refer to Figs. 6 and 7.
6. Connect other end of tubing to pilot burner according
to pilot burner manufacturer instructions.
Fig. 6—Always use new compression fitting.
OUTLET
PRESSURE
TAP
INLET OUTLET
WIRING
TERMINALS (2)
INLET
PRESSURE TAP
PRESSURE REGULATOR
ADJUSTMENT (UNDER
CAP SCREW)
CONVENIENCE
TERMINALS (2)
(OPTIONAL)
PILOT OUTLET
PILOT ADJUSTMENT
(UNDER CAP SCREW)
GAS CONTROL KNOB
M8436
MUST USE WIRE ADAPTER (NOT SHOWN) ON HSI OR DSI SYSTEM.
MUST USE PILOT PLUG (NOT SHOWN) ON HSI OR DSI SYSTEM.
1
2
1
2
Fig. 5—Proper use of wrench on gas control.
APPLY WRENCH
FROM TOP OR
BOTTOM OF GAS
CONTROL TO
EITHER SHADED AREA
M8562
CONNECT PILOT GAS TUBING (INTERMITTENT
PILOT IGNITION ONLY)
1. Remove the pilot gas seal (plug).
2. Cut tubing to desired length and bend as necessary for
routing to pilot burner.
CAUTION
1. Do not make sharp bends or deform the tubing.
2. Do not bend tubing at the gas control or pilot
burner after compression fitting has been tight-
enedbecausethiscanresult ingas leakageatthe
connection.
GAS CONTROL
TIGHTEN NUT ONE TURN
BEYOND FINGER TIGHT
FITTING BREAKS OFF AND CLINCHES
TUBING AS NUT IS TIGHTENED
TO
BURNER
M3076A
Fig. 7—Remove pilot gas seal (plug) and install
pilot gas tube for intermittent pilot application on
VR8345.
M8441
PV
MV
PV
MV
OFF
ON
PILOT GAS
TUBE

968-0160
VR8345M
INSTALLATION
WIRING
CAUTION
Disconnect power supply before making wiring
connections to prevent electrical shock or equip-
ment damage.
Follow the wiring instructions furnished by the appli-
ance manufacturer, if available, or use the following gen-
eral instructions. Where these instructions differ from the
appliancemanufacturer,followthe appliancemanufacturer
instructions.
Fig. 8—Install wire adapter for hot surface or direct spark ignition systems. Pilot plug must be in the valve
pilot opening.
M8440
PV
MV
PV
MV
OFF
ON
PILOT GAS SEAL
(PLUG)
WIRE
ADAPTER
All wiring, including insulated quick connect terminals,
mustcomplywithapplicableelectricalcodesandordinances.
1. Check the power supply rating on the gas control and
make sure it matches the available supply. Install thermostat
and other controls as required.
2. When the gas control is installed on a hot surface or
directsparkignitionsystem,attachthewireadapterprovided
to the wiring terminals. See Fig. 8 for the wire terminal
location.
3. Connect control circuit to gas control terminals. See
Figs. 4 and 9 through 11.
4. Adjustthethermostatheat anticipatorto0.7, therating
stamped on the valve operator.

68-0160 10
Fig. 9—VR8345 wiring connections in intermittent ignition system.
L1
(HOT)
L2
L2
1
L1
(HOT)
1
4
1
2
3
4
5
6
2
5
63
M8564
S8610U
MV MV/PV PV
GND
(BURNER) 24V
GND 24V TH-W
VENT
DAMPER
PLUG SENSE SPARK
THERMOSTAT
LIMIT
CONTROLLER
PILOT
BURNER
GROUND
SENSOR
IGNITER
MV
MV/PV
MV
VR8345
DUAL VALVE COMBINATION
GAS CONTROL
PILOT GAS
SUPPLY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
ALTERNATE LIMIT CONTROLLER LOCATION.
MAXIMUM CABLE LENGTH 3 ft [0.9 m].
CONTROLS IN 24V CIRCUIT MUST NOT BE GROUND LEG TO TRANSFORMER.
LEAVE VENT DAMPER PLUG CONNECTED.
REMOVE JUMPER AND CONNECT SENSE TERMINAL ON TWO ROD APPLICATION ONLY.
CONTROLLER
COMBUSTION
AIR BLOWER
MOTOR
COMBUSTION
AIR BLOWER
RELAY
AIR
PROVING
SWITCH
Fig. 10—VR8345 wiring connections in hot surface ignition system.
MV
MV
L1
(HOT)
L2
1
3
2
1
2
3
3
VR8345M
COMBINATION
GAS CONTROL
S8910U HOT SURFACE IGNITER CONTROL
HOT SURFACE
IGNITER/SENSOR
Q354 FLAME
SENSOR
LIMIT
CONTROLLER
THERMOSTAT OR
CONTROLLER
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
MAKE SURE L1 AND L2 ARE NOT REVERSED. THIS WOULD PREVENT FLAME DETECTION.
ALTERNATE LIMIT CONTROLLER LOCATION
SENSE TERMINAL AND Q354 FLAME SENSOR ON D MODELS ONLY.
BURNER
GROUND
M8563
QUICK
CONNECTS
AUTO IGNITION
SYSTEMS
ANSI Z21.20
STATUSLED:
1. Flash-IgnitionLockout
2Flash-WeakFlameSignal
3Flash-Internal Error-ReplaceControl
Pulsing"Heartbeat"-Normal Operation
S8910U HOT SURFACE IGNITION
INPUT VOLTAGES = 120 & 24 VAC, 60HZ
HSI = 120V, 6.5A MAX
VALVE = 24V, 1A MAX TOTAL 24V LOAD = 0.2 + VALVE LOAD
120VAC
HOT
570A0056
WARNING
!
Explosion hazard. Can cause
serious injury or death.
This device can malfunction if
it gets wet. Never try to use a
device that has been wet -- replace it.
GND
(BURNER)
24V
(GND)
VALVE
(GND)
24V
LED
L2
HSI
HSI
L1
SENSE
VALVE
MPLS., MN 55422
SEE
INSTRUCTIONS
FOR REMOTE
SENSE/DUAL
ROD
APPLICATIONS
TRIAL TIME,
NUM. OF TRIALS
CONFIGURATION
PLUG
120VAC
NEUTRAL
TRIAL
TIME: 7 SEC
NUM OF
TRIALS: 1
PrepurgeTime= 30Sec
Igniter WarmupTime= 34sec
HSI WIRE
ADAPTER
VR8345M
INSTALLATION