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P/N 42-9470 11/07 Copyright 2007 Mestek, Inc.
Cast iron condensing boiler
Cast iron condensing boiler
— Installation and operation manual
Starting the boiler
Failure to adhere to the following could result in severe personal
injury, death or substantial property damage.
Accessibility
Th e boiler must be accessible from both the right and left sides in order to do a
correct start-up/adjustment. Make sure the fl ame window on the left side and
the gas valve thrott le adjustment opening in the jacket top are accessible. See
Figure 29, page 38.
Follow the start-up checklist
Perform the start-up check list procedures before starting the boiler.
Turn off power and fuel supply
Turn off electrical power to boiler if not already off . Close the main manual gas
valve at the boiler.
Verify the gas type
Check the boiler rating plate to make sure that the boiler is for the type of gas
that will be used. If it is not, do not the boiler will have to be adjusted for the
correct gas, for both high fi re and low fi re.
Install boiler per manuals
Read and follow all boiler instructions, including this Boiler manual, the
200i
Vent/air manual and the
200i
Control manual.
All water piping, gas piping, vent piping and air piping must be complete before
starting the boiler.
Check gas piping for leaks
Check all gas piping for leaks, including the boiler interior gas piping and
connections, per page 18 of this manual.
Never leak test with fl ame
Never use an open fl ame to test for gas leaks. Always use an approved leak
detection method.
Propane gas applications
Th e odorant in propane gas can fade over time, reducing or eliminating the gas
odor. Th is makes the gas undetectable by smell. Before start-up, and periodi-
cally aft erwards, have the propane supplier check/verify the odorant level.
Never attempt to measure gas valve outlet pressure
Do not att empt to measure the boiler gas valve outlet pressure. Th e high negative
pressure in the venturi can suck fl uid out of a manometer, pulling it into the gas
valve. Th is would destroy the gas valve, rendering it unusable.
Start-up checklist
Read all boiler manuals
Th e
200i
is supplied with three manuals:
Boiler manual
Vent/air manual
Control manual.
Read and familiarize yourself with all three manuals before
proceeding with start-up.
Check the boiler area
Make sure there are no combustible materials or chemicals
that could cause air contamination in the boiler room.
Verify vent piping
Inspect vent piping to be sure all joints are secure and prop-
erly sealed.
Verify vent piping supports are correctly placed and secure.
Check vent termination to be sure it is correct and not ob-
structed.
Measure total vent pipe length and note the number of
fi tt ings. Make sure the vent complies with the
200i
Vent/
air manual.
Verify combustion air and ventilation
If combustion air is supplied from the boiler room, make
sure air openings agree with the requirements given in this
manual.
If combustion air is piped to the boiler:
Inspect air piping to be sure all joints are secure and
properly sealed.
Verify air piping supports are correctly placed and se-
cure.
Check air inlet termination to be sure it is correct and
not obstructed.
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Should overheating occur or
gas supply fail to shut off :
Do not interrupt water fl ow to the boiler.
Instead, shut off gas supply to the boiler
with the manual valve in the gas supply
line.
En cas de surchauff e ou si
soupape en gaz ne s’arrête
pas :
N’interrompez pas l’écoulement d’eau
par la chaudière. Fermez manuellement
le robinet d’arrêt de l’admission de gaz.
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