G.G. • Rev. 10-91 • © Honeywell Inc. 1991 • Form Number 69-0626—2
Application
These direct ignition combination gas controls are used
in gas-fired appliances with capacities up to 300 feet
3
/hour
at 1 inch wc pressure drop [8.5 meters
3
/hour at 0.25 kPa]
on natural gas. They include a manual valve, two automatic
operators, and a pressure regulator. See Table 1 for tem-
perature ranges and regulator types.
VR8305 set up for natural gas includes a 393691 LP
Conversion Kit. The kit contains a cap screw, a pressure
regulator adjustment screw, a tapered spring and a conver-
sion label.
VR8305
Direct Ignition
Combination Gas Control
BODY PATTERN: Straight-through body pattern.
INLET X OUTLET SIZES AVAILABLE: 1/2 x 1/2 inch,
1/2 x 3/4 inch, and 3/4 x 3/4 inch (factory-installed inlet
flange).
ADAPTERS: Adapters available for 1/2 and 3/4 inch
straight and angle connections. Refer to Table 2.
ELECTRICAL RATINGS:
VOLTAGE AND FREQUENCY: 24 Vac, 60 Hz.
THERMOSTAT HEAT ANTICIPATOR SETTING:
0.7A.
CURRENT DRAW: 0.70A.
CAPACITY:
Size Capacity (at 1 inch Minimum Maximum
(Inlet x Outlet) wc pressure drop
a
)
Regulated Capacity Regulated Capacity
1/2 x 1/2 240 feet
3
/hour 30 feet
3
/hour 340 feet
3
/hour
[6.8 meter
3
/hour] [0.8 meter
3
/hour] [9.6 meter
3
/hour]
1/2 x 3/4 270 feet
3
/hour 30 feet
3
/hour 370 feet
3
/hour
[7.6 meter
3
/hour] [0.8 meter
3
/hour] [10.5 meter
3
/hour]
3/4 x 3/4 300 feet
3
/hour 30 feet
3
/hour 415 feet
3
/hour
[8.5 meter
3
/hour] 0.8 meter
3
/hour] [11.8 meter
3
/hour]
a
Capacity based on 1000 Btu/feet
3
, 0.64 specific gravity natural gas at 1 inch wc pressure drop [37.3 MJ/meter
3
, 0.64
specific gravity natural gas at 0.25 kPa pressure drop].
Honeywell
Use conversion factors in Table 3 to convert capacities for
other gasses.
TABLE 1—TEMPERATURE RANGES AND
REGULATOR TYPES.
Ambient
Model Temperature Regulator
Number Range Type
VR8305H 0° F to 175° F Slow-opening
[-18° C to +79° C]
VR8305K -40° F to 175° F Slow-opening
[-40° C to +79° C]
VR8305M -40° F to 175° F Standard-opening
[-40° C to +79° C]
VR8305P -40° F to 175° F Step-opening
[-40° C to +79° C]
APPROVALS:
American Gas Association design certificate:
UP-70-69A.
Canadian Gas Association design certificate:
UP-70-69A.
Australian Gas Association design certificate:
Applied for.
Delta C: P-70-42A19
TABLE 2—FLANGE PART NUMBERS.
Part Number
Inlet/ Without With
Outlet Flange Hex Hex
Pipe Size Type Wrench Wrench
1/2 inch NPT Straight 393690-6 393690-16
Elbow 393690-3 393690-13
3/4 inch NPT Straight 393690-4 393690-14
Elbow 393690-5 393690-15
NOTE: Flange Kits include one flange with attached O-
ring and four mounting screws.
TABLE 3—GAS CAPACITY
CONVERSION FACTORS.
Specific Multiply Listed
Gas Gravity Capacity By
Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.62
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