I
NSTALLATION
H
EAT
RECOVERY
UNIT
en-30
en
2.12.5 Checking operation
1. Open the indicated panels to check the operation of the
dampers and fans.
2. Go to function
menu > Maintenance > Checking HR unit
.
3. Check the operation of different fans and dampers in each
test mode. Use the table below for this purpose.
Opmerking:
n
The extract fan
2
and the exhaust air damper
4
are not visible. Check this with reference to the
pressure difference over the extract fan.
In the final test mode (7), the fan runs but there is
no pressure difference because the air damper is
closed.
Opmerking:
n
The opening and closing of the dampers can take a
little while.
MODE
FANS
(
SPEED
)
VALVES
N
O
.
DESCRIPTION
1
SUPPLY
2
EXTRACT
3
FRESH
AIR
4
EXHAUST
AIR
5
RECIR
-
CULATION
6
BY
-
PASS
1
unit off
off
off
(no pressure
difference)
closed
closed
(no pressure
difference)
open
closed
2
heat recovery
speed 1
1
1
(pressure dif-
ference)
open
open
(pressure dif-
ference)
closed
closed
3
heat recovery
speed 2
2
2
(pressure dif-
ference)
4
heat recovery
speed 3
3
3
(pressure dif-
ference)
5
recirculation
1
off
(no pressure
difference)
closed
closed
(no pressure
difference)
open
closed