5
CURRENT
4.2.3 - REMOTE CONTROL
• The unit is factory-wired for heating mode operation. Operating control of unit is possible by connecting 2 potential-free, high-
quality external switches (not included):
- 1 for the remote On/Off signal(contact closed = operation authorized, contact open = off),
- 1 for change-over of the operating mode (contact closed = heating mode, contact open = cooling mode).
• The On/Off signal is connected to terminals 1 and 2 of the PCB located in the switch box (remove the existing bridge - see
diagram).
• The mode change-over signal is connected to terminals 3 and 4 of the PCB (remove the existing bridge - see diagram).
• The wiring of these contacts must not be routed near power cables in order to avoid electromagnetic disturbances.
• Use shielded cable.
• Max. connection cable length: 20 m.
• Minimum wire size: 0.25 mm
2
.
2
1
3
4
PMERV
6
1
2
5
Remote control
K 60 D 035 Z
WARNING:
Mode changes (heating/cooling) are to be performed
with the unit shutdown.
Remote control "off"
Operating mode
(
❋
)
(
❋
)
2
1
3
4
PMERV
(
❋
)
(
❋
)
(
❋
) Jumper to be removed
The "Remote control unit, K 60 D 035 Z" can perform this
function.
4.2.4 - MISCELLANEOUS
• Alarm transfer:
Potential-free, closing contact ( 2A - 250 VAC max.) located on the PMERV terminal board (terminals 5 and 6 of the PCB)
for remote signaling. See electrical diagrams.
• Water circulating pump control:
Do not use this contactor for the underfloor "Heating/cooling" application.
4.2.5 - PCB CONNECTION DETAILS
• Note: The terminals are of the "cage with spring" type.
Follow the indications below to connect them.
- These terminals take the following wires:
. rigid,
. flexible (avoid splicing the strands!),
. with ends.
- A single conductor per securing point.
- Make sure that the wires are correctly connected to the terminal board.
Incorrect connection can cause operating problems as well as overheating
which can cause fires.
3
1
2
Remote control "off"
Operating mode
(
❋
) Jumper to be removed
Nominal current
A
Max. current
A
Starting current
A
7.8
9.6
45
6.4
8
45
COOLING mode
HEATING mode
