SHR 1504 Installation Manual

13
START UP PROCEDURE
Every time the unit is plugged in, it will go through a 45 second self diagnostic. During this time, the fresh air fans will not turn on.
The switch on the side of the unit is used to toggle between STANDBY, LOW speed and MEDIUM speed modes.
In order to activate HIGH speed, a jumper must be placed between the DEHUM + and DEHUM - contacts.
Airflow Balancing
WARNING
If the unit’s air flows are not properly balanced…
– The unit’s efficiency may be reduced.
– The unit’s core may become damaged.
– Normal operation of the unit could cause the pressurization or depressurization of your home, which can lead to air leaks or
backdrafting of any combustion appliances.
The balancing procedure consists of measuring the supply air flow and the return air flow to ensure that they are equal. A difference
of up to 10% is considered acceptable. In the cases where the air flow is not exactly the same, it is recommended to have a higher
return air flow to ensure that the temperature of the supply air flow coming from outside is as close to room temperature as possible.
NOTE: For optimal performance, HRV unit should be re-balanced after a major renovation or after the installation of extra grilles or registers.