Operation; Modes Of Operation - Robertshaw SER Serie Manual De Instalación, Operación Y Mantenimiento

OPERATION

An Energy Recovery Ventilator (ERV) is designed to bring in fresh air into the building while exhausting an equal amount of stale air. During colder
months, utilizing the heat recovered from the stale air before it is exhausted outdoors warms the cold fresh air. At the same time, humidity
contained indoors is transferred back to the incoming fresh and dried air.
During warm and humid months, the ERV will cool the incoming outdoor air by using the cool air-conditioned air that is being exhausted from
indoors while allowing the humidity contained in the fresh air to be transferred to the exhaust air.
Robertshaw ERV's are designed to run continuous or on intermittent, giving the homeowner complete control over their air quality. Continuous low
speed ventilation is recommended, which will help eliminate carbon dioxide, voc's and other gases as well as freshen up the home. Intermittent high
speed ventilation can be obtained through a variety of optional remote controls found in this manual.

MODES OF OPERATION

The entire line of SER series Energy Recovery Ventilators comes equipped with Robertshaw's new electronic uni-control board which offers a wide
variety of features making it the ultimate ventilation control system. Robertshaw engineers have used the latest technology to provide solid, trouble
free operation under any conditions.
The Robertshaw uni-control board offers stand alone operating capabilities as well as an exclusive 2 wire communication to most external controls.
An on-board diagnostic LED helps find problems quickly and efficiently. For example the LED can be used to signal a broken or shorted electronic
wall control wire. Electronic air temperature probe gives this board accurate readings in order to minimize unnecessary defrost operation, and the on-
board jumpers provide the user with the option of adjusting defrost time and sequence to optimize performance under abnormal conditions. The
defrost operation is automatic and is usually never adjusted.
Air from
Outside
Air to
Outside
the air at the rate you select, either at low or medium speed, and switches
to high speed when activated by an optional remote control. The "Low"
and "Med" fan speed selection will cause the unit to operate in continuous
exchange mode at an exchange rate of 35% and 50% maximum airflow
rating respectively. Continuous mode is recommended, since pollutants
are slowly but constantly being generated in your house.
Air to
outside
1. Continuous / Ventilation Mode
Air from
House
In this mode of operation both fans
are operating and exchanging air with
the outside. The energy recovery ven-
Air to
House
tilator (ERV) constantly exchanges
3. Defrost (on selected models)
Air from
House The automatic defrost cycle consists of a fan shutdown. When the supply air stream temperature goes below
-5°C (23°F), the supply motor shuts down and the exhaust motor goes into high speed. Ambient air is passed
through the unit for a period of 5 minutes. The supply motor will then re-start and run at the preset speed. The
exhaust motor will also slow down to the preset speed, and the unit will operate in the run cycle for 25 min-
utes. This fan shutdown defrost cycle continues until the supply air stream rises above 0°C (32°F).
* no exchange of air
2. Intermittent / Standby Mode
The system is always on standby and operates
at high speed when activated by an optional
remote control. "Standby" should be selected if
the user wishes to stop the unit from
continuous exchange. We recommend that
the "Standby" mode only be used if your system is equipped with an
optional external control, in which case, the unit would activate to
"High" fan speed, until the control is satisfied and then return to
standby (off).
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