SystemAir fantech ECHO 2800Xi Series, Инструкция по установке, эксплуатации и обслуживанию, Страница: 4 / 19

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Installing the BYPASS module (BPM1434 module) accessory
Through normal operation and including defrost mode, the HRV/ERV may produce some condensation. This water should flow into a nearby drain, or
be taken away by a condensate pump. The HRV/ERV and all condensate lines must be installed in a space where the temperature is maintained
above the freezing point. A “P” trap should be made in the drain line. This will prevent odors from being drawn back up into the unit.
Install the drain hose, making a “P” trap
Installing Drain Line
The unit has hinged access doors on the front and removable panels on the back. The front left and right access doors are hinged for easy access to
the filters, exchanger and fan motors while the back left and right panels are fastened to the unit.
When facing the front access doors the outdoor and exhaust air duct connections are on the left side of the unit and the supply and return air duct
connections are on the right side of the unit. If this factory configuration is not suitable for the HRV/ERV designated space, the front access doors
and back panels are interchangeable in order to get an alternate configuration for duct connections as shown below.
Factory configuration (left). Configuration can be reversed on site for alternate duct layout (right)
Port configuration
Outdoor and
Exhaust Air
Outdoor and
Exhaust Air
Supply and
Return Air
Supply and
Return Air
The BPM module accessory is an insulated recirculation damper box that is mounted on the side of the unit, over the outdoor air duct connection of the
unit. It extends the outdoor air duct connection and has another duct connection for recirculating indoor tempered air.
The purpose of the BPM1434 module accessory is to offer an alternative exchanger defrost method. Instead of the default timed based exhaust defrost
that can cause depressurization of the ventilated space in some especially tight building envelops, the BPM module can recirculate tempered indoor air
through the supply air stream during defrost. See the “Exchanger defrost” section for more details.
The BPM module accessory can also be used to recirculate indoor air when ventilation is not required. See the “Recirculation” section for more details.
If a BPM module accessory has been supplied with the unit it should be installed as per the provided installation manual that comes with
the accessory.
The unit control has a dedicated 24VAC digital output to energize the BPM module. See the “Wiring the dampers & the BPM module actuators” section
for more information on wiring the BPM module.
Weather hoods, louvers, ducts and dampers
The outdoor air intake weather hood or louver must be positioned well away from any source of contamination. The outdoor air intake and the exhaust
air weather hoods or louvers must be adequately spaced, 10 feet (3 m) apart minimum, to prevent cross-contamination. They must be located such
that they are high enough off the ground or other horizontal surfaces, 18 inches (460 mm) minimum, to be clear of any snow accumulation or other
possible obstructions or as required per local building code.
In order to minimize the friction losses, the open area of the weather hoods or louvers must be adequate for the required airflow of the ventilation
system. It is recommended that the velocity through the open area of a weather hood or louver be kept below 500 FPM (2.5 m/s) to minimize the rain
water entrainment.
The weather hoods or louvers must have a screen with 1/4 inch (6 mm) mesh to prevent birds and rodents from entering the ductwork. Do not use
smaller mesh as it may be more susceptible to getting clogged.
The outside perimeter of weather hoods or louvers must be adequately sealed to prevent leakage into the building envelop.
The ducts should be fabricated of galvanized sheet metal. In order to minimize the friction losses, ductwork should be sized adequately and be kept
short with as few bends or elbows as possible. Favor 45° elbows over 90° elbows and use “Y” tees over standard 90° tees if possible. Account for
dampers and/or other duct mounted accessories as part of the duct design.
All duct joints must be fastened and sealed with proper duct sealant to minimize air leakage.
Ducts connecting the unit to the outside weather hoods should be adequately insulated in order to prevent any condensate to form on the surface of the
ducts.
Installation (Cont'd) Installation (Cont'd)
K (Drain 2x)
in mm
3/4 NPT 19 NPT