Clock Natural Gas Meter - Viessmann VITODENS 200-W Service Instructions Manual

Vitodens 200-W B2HA 112, 150 Service

Clock Natural Gas Meter

Clock natural gas meter to verify input.
1. Ensure all other gas equipment served by the meter
is turned off during timing of gas input to the
Vitodens 200-W, B2HA boiler.
2. Measure the time in seconds it takes for the boiler to
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use 10 ft. of gas. Divide 3600 x 10 by the number
of seconds and you get the number of ft.
used per hour. Multiply this number by the heating
value of the gas to obtain Btu per hour input.
For example:
A Vitodens 200-W, B2HA 150 boiler (530000 Btu/h
input) requires 68 sec. to use 10 ft.
contacting the local utility, you will find the heating value
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is 1000 Btu per ft. .
Therefore:
3,600 sec./h x 10 revolutions
36,000/68 x 1000 = 530000 Btu/h input.
The boiler input is correct.
Burner input formulas (for low altitude only):
INPUT=(3600t) x 1000 where
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t=TIME (sec.) for 1 ft.
INPUT=(3600 x .01 x 1000 x 35.31)T where
T = TIME (sec.) for .01 m
IMPORTANT
A boiler underfired by 5% is acceptable. Do not overfire
the boiler.
CAUTION
Always contact your gas utility to obtain the correct
heating value before clocking the meter.
Start-up and Service
3
of gas
3
of natural gas. After
3
natural gas
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