VAM350~2000FC
Total Heat Exchanger
HRV (Heat Reclaim Ventilation)
4P415947-1A – 2017.08
Installation manual
10
Required electrical connections for possible additional field
supplied external damper
The external damper prevents the intake of outdoor air if the HRV is
switched off. (Refer to figures
2
,
3
, and
4
, item 19).
1.
The HRV’s main unit PCB operates the HRV and provides
a contact for the external damper.
2.
Required electrical connections
Connect one end of the accessory harness to the X24A
connector on the PCB and the other end to the harness leading
to the external damper via an insulated splices-closed barrel
connector (0.75 mm
2
).
Make sure that the wire is released from strain. The electrical
circuit should have a current protection of 3 A and a maximum
voltage of 250 V.
X24A will make contact when the HRV fan starts operating.
The contact will be opened when the the fan is stopped.
How to install the optional adapter circuit board
(KRP2A51, BRP4A50A)
When installing any of these options on the VAM1500/2000, it is
necessary to prepare the fixing plate (EKMPVAM).
When installing KRP2A51, it is necessary to prepare the fixing box
(KRP1BA101).
For VAM350/500/650/800/1000
1
Loosen the screws from the unit.
2
Attach optional PCB in box.
3
Guide the PCB wire through the dedicated holes and attach as
instructed in
"Opening the switch box"
.
4
Attach the box to the unit.
5
After the wires are connected, fasten the switch box cover.
For VAM1500/2000
1
Remove the middle screws of the standard fixing plate.
2
Attach the optional fixing plate (EKMPVAM) on top of the
standard one.
3
Attach optional PCB in box.
4
Guide the PCB wire through the dedicated holes and attach as
instructed in
"Opening the switch box"
.
5
Attach the box to the fixing plate.
6
After the wires are connected, fasten the switch box cover.
CAUTION
Make sure you follow the instructions below in detail.
1
HRV main unit
2
External damper
3
Earth to external damper
4
Power source
WARNING
In case an electrical heater is installed, use
nonflammable duct. Be sure to keep 2 m or
more between the heater and HRV unit for
safety.
BRP4A50A
KRP1BA101
KRP2A51
BRP4A50A
EKMPVAM
KRP2A51
+KRP1BA101
