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Model
VT8800
a
Capacity based on 1000 Btu/feet
specific gravity natural gas at 0.25 kPa pressure drop).
b
Valves are guaranteed at 77 percent of the rating.
Fig. 2. Typical capacity curve for VT8800 Family Water Heater Control System.
Gas (Btu/ft
Manufactured (500)
Mixed (800)
Propane (2500)
Heat
Excessively high temperature can damage the control.
Make sure the maximum ambient temperature at the
control does not exceed the rating of the control. If the
appliance operates at very high temperatures, use
insulation, shielding, and air circulation, as necessary, to
protect the control. Proper insulation or shielding should
be provided by the appliance manufacturer; verify proper
air circulation is maintained when the appliance is
installed.
Table 1. Capacity of VT8800
Size (Inlet x Outlet),
in.
1/2 NPT x 1/2 Inverted
Flare
3
, 0.64 specific gravity natural gas at 1 in. wc pressure drop (37.3 MJ/meter
Table 2. Gas Capacity Conversion Factor.
3
)
0.60
0.70
1.55
VT8800/WT8800 WATER HEATER CONTROLS
Capacity (at 1 in. wc
a,b
pressure drop
)
3
3
50 ft
/hr (1.4 m
/hr)
Specific Gravity
INSTALLATION
When Installing This Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
3
Minimum Regulated
Capacity
3
3
30 ft
/hr (0.85 m
/hr)
Multiply Listed Capacity By
0.516
0.765
1.62
Maximum Regulated
Capacity
3
3
85 ft
/hr (2.8 m
/hr)
3
, 0.64
69-1731
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