250FC
Total Heat Exchanger
HRV (Heat Reclaim Ventilation)
4P415946-1 – 2015.08
Installation manual
8
Opening the switch box
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 figure
, item 19).
1.
The HRV's main unit PCB operates the HRV and supplies power
for the external damper.
Source voltage supply starts when HRV starts operating.
Source voltage supply is stopped when HRV is switched off.
2.
Required electrical connections
Connect one end of the accessory harness to the X15A
connector on the PCB and the other end to the harness leading
to the external damper via a insulated splices-closed barrel
connector (0.75 mm
2
).
Make sure that the wire is released from strain.
3.
Required settings
Default setting of the X15A connector: Not in operation
Change this default setting as follows by means of the remote
controller for incorporating function of the external damper in the
system:
•
Mode No.: 18 (Group control) or 28 (Individual control)
•
Setting switch No.: 3
•
Setting position No.: 03
CAUTION
Before opening the cover, be sure to turn off the power
switches of the main units and other devices connected
with the main units.
■
Remove the screw securing the cover and open the
switch box.
■
Secure the power cord control wires with the clamp,
as shown in the next figures.
1
Electric component mounting base
2
Printed circuit board
3
Electrical compartment cover
4
Securing screw
5
Grounding terminal
6
Terminal board
7
Transmission wiring terminal board
8
Slide
9
X15A connector
10
Harness for connection of additional external damper (supplied
accessory)
11
Insulated splices-closed barrel connector (0.75 mm
2
) (field
supply)
12
Double or reinforced insulated flexible cable (0.75 mm
2
) to
external damper (field supply)
13
Tie wrap (field supply)
1
2
9
7
6
4
1
4
5
PCB
12
13
12
11
12
10
10
Supply voltage
Connected load capacity
220 V
≤
0.5 A
230 V
240 V
2
1
PCB
X15A
3
1
HRV main unit
2
External damper
3
Earth to external damper, if no
class II construction (EN60335-2-40)
Summary of Contents for VAM250FC
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