Lifebreath 1500E-ECM, Инструкция по установке

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20
Stale Air Return System
The stale air return system is used to draw air from
the points in the building where the worst air quality
problems occur. Return air suction points should be
located at the opposite side of the room to the fresh air
inlet. The inlets may be located in the ceiling or high on
the walls and fitted with inlet grilles.
Many commercial activities produce air contaminants in
the form of dusts, fumes, mists, vapors and gases.
Contaminants should be controlled at the source so
that they are not dispersed through the building nor
allowed to increase to toxic concentration levels. The
heat recovery ventilator allows for economical operation
of the HVAC system while effectively removing
contaminants from the space. In designing the exhaust
portion of the system the exhaust grilles are placed
so as to remove the contaminants while not
allowing them to enter the breathing zone of the
occupants.
For contaminants that are lighter than air, grilles should
be located high on the wall. If contaminants are heavier
than air, a lower placement of the grilles will be
required. Information on a contaminants specific gravity
and toxicity should be available from the chemical data sheets.
Fresh Air Supply System
The fresh air supply ductwork from the HRV may be
directly connected to the return air duct of the forced
air system. When directly connected it is recommended
that the air handler blower be in constant operation to
move the fresh air about the building Also, it is
advisable to include a short length of fabric flex
duct or other non-metallic connector in this hard
ducted line in order to keep the HRV acoustically
isolated and separately grounded (electrically) from
the air handler. This will avoid a possible shock hazard
to service people if a short to ground develops in
one of the devices. It may be necessary to install a
separate fresh air supply ductwork system if the heating
is other than forced air.
When installing an HRV, the designer and installer
should be aware of local codes that may require smoke
detectors and/or fire stats in the HVAC or HRV
ductwork. Because an HRV is designed to bring fresh
air into the building, structures may require a supply
voltage interrupt when smoke or flame sensors are
triggered or central fire alarm system is activated.
Supply air grilles may be ceiling or high wall mounted.
Avoid locating incoming fresh air grilles that could cause
a direct draft on the occupants as the incoming air may
be below room temperature. A reheat duct heater can
be installed to improve occupant comfort. Information
on electric or hydronic heaters is available through Airia.
Ducting - Distribution
Electrical Connections
System is 240V, 1 phase, 60 Hz. This unit meets all
local codes and requirements.
It is STRONGLY recommended that an electrical
disconnect be installed prior to the HRV, and that it is
turned off and locked out before servicing the unit. All electrical connections should be made by a qualified
electrician.
Two (2) knock-outs are provided. One is to be used for
line voltage, and the other one for 24V control wires.
Balancing
The 1500I-ECM/1500E-ECM has been programmed to
provide constant airflow on each airstream for external
static pressures of up to 1” w.g.
Within this range, each airflow can be adjusted
as described in “Adjusting the Airflow” section of this
manual. Beyond 1” w.g. of external static pressure, a balancing
damper may be required on the higher
airflow. See “Pitot Tube Air Flow Balancing” in this
manual.