REMEHA Quinta Pro Installation, User And Service Manual page 39

Fig.34 SCU-X01 PCB
SW1
SCU-X01
X3
Status
Nc C No
Nc C No
123157 - v.07 - 10082015
SW2
X2
X2a
X4
Status
Nc C No
Nc C No
AD-0000059-01
Caution
If the neutral position of the three-way valve is adjusted with pa­
rameter , the pump must be connected as follows:
N = N pump
C = L pomp
= PE pump
Control of external gas valve (EgV)
If there is a heat demand, an alternating voltage of 230 VAC, 1 A (maxi­
mum) becomes available on the EgV terminals of the connector to control
an external gas valve.
Connecting the minimum gas pressure switch (Gps)
The minimum gas pressure switch blocks the boiler if the gas inlet pres­
sure becomes too low.
1. Connect the minimum gas pressure switch to the Gps terminals of
the connector.
The presence of the gas pressure switch must be set using parameter
.
Connecting a heat recovery unit (Hru)
1. Connect the wires from the heat recovery unit to the Hru terminals of
the connector.
The presence of the heat recovery unit must be set using parameter
.
Operation signal and error signal (status)
You can choose between an alarm or operation signal using parameter
.
If the boiler is operating, the operation signal can be switched via a po­
tential-free contact (maximum 230 VAC, 1 A) on the No and C terminals
of the connector.
If the boiler is locked out, the alarm signal can be transmitted via a po­
tential-free contact (maximum 230 VAC, 1 A) on the Nc and C terminals
of the connector.
Connection options for the PCB (SCU-X01)
The SCU-X01 PCB has two potential-free contacts (status), which can be
configured as required. Depending on the setting, a maximum of two mes­
sages about the status of the boiler can be transmitted. See table. Select
the messages required using rotary knobs SW1 and SW2. Use rotary
knob SW1 for messages on the status connector X3. Use rotary knob
SW2 for messages on the status connector X4.
Tab.23 Configuring the rotary knobs
Position C-NO
0 Alarm standby
1 Alarm inverted active
2 Burning standby
3 Burning inverted active
4 Burning low standby
5 Burning high standby
6 Maintenance message stand­
by
7 CH mode standby
8 DHW mode standby
9 CH pump standby
6 Installation
C-NC
Alarm active
Alarm inverted standby
Burning active
Burning inverted standby
Burning low active
Burning high active
Maintenance message active
CH mode active
DHW mode active
CH pump active
39