Aerovent IM-500 - Manual (Page 2)

2 Aerovent IM-500
Recirculating Units
Building Relief
Adequate building relief MUST be provided so as not to
overpressureize the building when the heating system is
operating at its rated capacity. It should be noted that this
can be accomplished by taking into account, through stan-
dard engineering methods, the structure’s designed infiltra-
tion rate; by providing properly sized relief openings; or by
interlocking a powered exhaust system; or by a combination
of these methods.
Control Wiring
Entry for control wiring should be ran into the control
room provided. Please consult unit drawing and locate the
control room on that drawing.
Insulated Units
It is NOT recommended that a recirculation unit be
installed in a building that is NOT insulated where the out-
side air temperature falls below 32 o F.
Ventilation Air
Excessive recirculation or insufficient ventilation air, which
results in inadequate dilution of the combustion products
generated by the heater, may create hazardous concentra-
tions of carbon monoxide, nitrogen oxide, and other com-
bustion products in the heated space.
Fossil Fuel Powered Equipment
If gas fork trucks or other fossil fuel powered equipment
are utilized in the conditioned area, additional ventilation
requirements for the factility must be addressed separately.
Applications
If there is any doubt in the application of this heater, con-
sult the manufacturer.
Ventilation Air
All ventilation air to this heater MUST be ducted directly
from the outdoors.
Interlocks
If failure or malfunction of this heater creates a hazard to
other fuel burning equipment in the building (e.g. when the
heater is providing make-up air to a boiler room), the unit is
to be interlocked to open inlet air dampers or other devices.
Inlet Ducts
When inlet ducts are installed, the heater MUST exchange
the air inside the duct a minimum of 4X prior to an ignition
attempt. Please consult the manufacturer for instructions.
WARNING
On heaters which recirculate air, outside ventilation air
must be provided in accordance with the information
shown on the heater nameplate.
REFER TO THE HEATER RATING PLATE FOR
DETERMINING THE MINIMUM GAS SUPPLY
PRESSURE FOR OBTAINING THE MAXIMUM
GAS CAPACITY FOR WHICH THIS HEATER IS
SPECIFIED.