INSTALLATION INSTRUCTIONS
VR8105, VR8205, and VR8305
Direct Ignition Combination
Gas Controls
APPLICATION
These direct ignition gas controls are used in gas-fired
appliances with up to 415 ft
3
/hr capacity at 1 in. wc
pressure drop (8.5 m
3
/hr at 0.24 kPa) on natural gas.
They include a manual valve, two automatic operators
and a pressure regulator.
These gas controls are available in a range of valve
capacities; see Table 1. (Table 2 provides gas capacity
conversion factors.) The suffix letter indicates
temperature range and regulator type; see Table 3.
Table 1. Valve Capacity.
a
a
Capacity based on 1000 Btu/ft
3
, 0.64 sp gr natural gas at 1 in. wc pressure drop (37.3 MJ/m
3
, 0.64 sp gr natural gas
at 0.25 kPa pressure drop).
b
Capacity is reduced by 5 percent when using an outlet screen.
c
Valves are guaranteed at only 77 percent of the rating.
d
Minimum regulation for LP gas is 15,000 Btuh.
e
Minimum regulation for LP gas is 40,000 Btuh.
f
Minimum regulation for LP gas is 50,000 Btuh.
Table 2. Gas Capacity Conversion Factor. Table 3. Model Number Suffix Letter Designation.
Model
Size Inlet-
Outlet (in.)
AGA Certified
Capacity for
Natural Gas
AGA Certified Minimum
Regulation for
Natural Gas
AGA Certified Maximum
Regulation for Natural
Gas
ft
3
/hr m
3
/hr ft
3
/hr m
3
/hr ft
3
/hr m
3
/hr
VR8105 1/2 x 1/2 85 2.3
10
d
0.4 120 3.4
VR8205 150 4.2
20
e
0.6 200 5.7
VR8305
b,c
240 6.8
30
f
0.8 340 9.6
VR8305
b,c
1/2 x 3/4 270 7.6 370 10.5
VR8305
b,c
3/4 x 3/4 300 8.5 415 11.8
Gas Specific Gravity
Multiply Listed
Capacity By
Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.62
Model No.
Suffix
Letter
Ambient
Temperature Range
Pressure
Regulator Type
A 0°F t0 175° F
(-18°C to +79°C)
Standard
C Step-opening
H Slow-opening
K -40°F to +175°F
(-40°C to +79°C)
M Standard
P Step-opening
QTwo-stage
RConvertible
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