Biddle HR 25 - Page 31

HR MANUAL INSTALLATION
Manual version 4.1 (26-07-2018)
en-31
en
5. Close the inspection panels.
Note:
n Leave the pressure difference meter on the extract
fan.
2.13.5 Calibrate air volume
Set the three speeds for each airflow.
MODE FANS (SPEED) VALVES
NO. DESCRIPTION
1
SUPPLY
2
EXTRACT
3
FRESH AIR
4
EXHAUST AIR
5
RECIRCU-
LATION
6
BY-PASS
1 unit off off off
(no pressure
difference)
closed closed
(no pressure
difference)
open closed
2heat recovery
speed 1
11
(pressure dif-
ference)
open open
(pressure dif-
ference)
closed closed
3heat recovery
speed 2
22
(pressure dif-
ference)
4heat recovery
speed 3
33
(pressure dif-
ference)
5recirculation1 off
(no pressure
difference)
closed closed
(no pressure
difference)
open closed
6 night cooling 2 2
(pressure dif-
ference)
open open
(pressure dif-
ference)
closed open
7 exhaust air
damper closed
off 1
(CAUTION:
no pressure
difference)
closed closed
(no pressure
difference)
open closed