Bakers Pride DRG-40 - Manual (Page 28)

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INSTALLATION INSTRUCTIONS
69-1226-2
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 0.25 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 to 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
Q Two-stage
R Convertible
69-1226-2.fm Page 1 Thursday, November 13, 2003 12:50 PM