Yazaki AROACE CH-MG150, Installation Instructions Manual

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ensure all requirements are being
considered. Never install a gas-fired
appliance in an unventilated space.
ASME Section VI
– Recommended
Rules for the Care and Operations of
Heating Boilers, Reference 6.04” states:
“The boiler room must have adequate air
supply to permit clean, safe combustion and to
minimize soot formation. An unobstructed air
opening
should be provided. It may be sized
on the basis of 1-square inch free area per
2000 BTUh maximum fuel input of combined
burners located in the boiler room, or as
specified in the National Fire Protection
Association standards for oil and gas burner
installations for the particular job. The boiler
room air supply openings must be kept clear at
all times.”
Figure 11
– Combustion Air Detail
VENTING
Each chiller-heater is supplied with a
suitable vent cap intended for installation
on
the exhaust outlet when the
equipment is installed outdoors. Remove
the right side panel on the cabinet and
attach the vent cap to the exhaust tube
with ten M10
(or 3/8”)
bolts
(field-supplied)
.
Figure 12
– Factory Vent Cap
In cases where an extended vent is
necessary, follow the normal venting
rules. Venting the flue products safely is
a key concern when installing any gas-
fired appliance and Yazaki chiller-heaters
are no exception. As with combustion
air, rules for the proper venting of gas-
fired appliances are also covered in the
National Fuel Gas Code, NFPA Section
54.
All MG-Series chiller-heaters are
Category I appliances. When choosing
vent material size, the chillers are
classified as “fan” vent-type since the fan
on the burner only assists in moving flue
products through the unit. The fan does
NOT provide enough force to do more
than push the flue products a few feet
down the vent, so it does not have
enough force to qualify as Category III,
side discharge venting. There are
aftermarket
kits that can provide
Category III capability for Category I
appliances should the need arise.
Yazaki has no kit for this. Warranty may
be void on the Yazaki chiller-heater if
such a kit is used, but not installed or
applied correctly. Carefully follow all
instructions when applying these kits,
and if necessary, contact Yazaki Energy
Systems, Inc. for guidance on integration
of the kit to the unit control safeties.