HeatStation™ CONDENSING WATER BOILER
19
34-1161 05/17
7.5 Combining Remote Air Ducting
Each boiler MUST have separate intake piping, unless the air inlet piping, exhaust duct and other system
considerations have been fully evaluated and a combined duct system designed by one of the duct design firms
identified a. Before operation of a combined remote air ducting system, all of the duct design firm’s system installation
and operation requirements must be in place, their instructions followed and the system must be properly maintained.
Combined HeatStation air intake piping must incorporate a variable speed blower capable of providing and regulating
positive pressure air supplied to all boilers in the system.
The pressure of the supplied air must not be less than
0.0
″ W.C. and must not exceed 0.25″ W.C
.
The common combustion air supply system must be interlocked, so the boilers will not begin operation until the
common combustion air supply is proved to be within the range of 0.0 to 0.25
″ W.C. See Section on
Remote
Connections
for a discussion of how to connect the proving circuit.
WARNING: Do not combine remote air ducting of multiple appliances into a single remote air duct unless the
combined remote air ducting system has been evaluated and designed by a specified duct design firm and
the combined remote air duct system is installed, operated and maintained following instructions from that
firm. Combining remote air ducting without following these requirements can result in failure of the boiler and
venting system and/or exposure to carbon monoxide and can result in property damage, personal injury or
death.
7.6 Air Filtration
The field installed optional air inlet filter box must be attached to the combustion air inlet on any appliance located
where it is exposed to dusty, dirty or lint filled combustion air. Replace the filter on a 3 to 6 month schedule, or more
often, based on severity of contamination Inadequate combustion air or non-combustible particulate matter such as
dust, dirt, dryer lint, concrete dust, dry wall dust or the like can be drawn in with combustion air and block burner ports.
This can cause unreliable operation and non-warrantable failures. When the optional field installed filter box is required,
do not operate the appliance without a suitable filter. See the following illustration for filter and filter box kit part numbers
and installation instructions.
