Biddle HR 25 - Page 36

INSTALLATION HEAT RECOVERY UNIT
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3. Set the pressure switch 7 to the pressure difference as
specified in step 2.
4. Check whether the frost protection is not unnecessarily
active:
1. Set the unit to fan speed 3.
Note:
n If the unit was at a different speed, it will take
approximately two minutes before the valve
positions are adjusted.
2. Check in menu > Maintenance > Unit control that the
value of the fourth input (1-2-3- 4) is a nil: x-x-x-0
2.13.7 Checking temperature sensors
The unit contains temperature sensors.
1. Check in menu > Maintenance > Unit control that the sen-
sors measure realistic values (Tfresh-Tsupply, Textract-Tex-
haust)
2.13.8 Checking the CO
2
sensor (accessory)
If a CO
2
sensor is used:
1. Check in menu > Maintenance > Unit control that the sen-
sor is measuring a realistic value (Analog in)
2.13.9 Checking the heating / c
ooling (accessory)
1. Check that the heating/cooling module responds to the
con-nected heating/cooling system.
2. Limit the minimum temperature for cooling to prevent
condensation on the outside of the device and channels.
(menu > Settings > 7. Minimum air temperature cooling)
2.13.10 Finishing the unit
1. Close all inspection hatches.
2. Place the b-touch control panel in the holder.