Connection Options For The Pcb (Scu-S03); Connection Options For The Pcb (Scu-X02) - REMEHA Quinta Pro Installation, User And Service Manual

Fig.73 SCU-S03 PCB
SCU-S03
X1
Tsol Gps
Tsol Gps
Fig.74 SCU-X02 PCB
X1
F 2AT
SCU-X02
X3
3wV
N C
3wV
N C D
123157 - v.07 - 10082015
X2
X2a
Hru
Hru
AD-0000058-01
1 C 2
Jp1
X2
X2a
X4
D
3wV
N L C
N L C
AD-0000060-01

14.3.2 Connection options for the PCB (SCU-S03)

If the boiler is fitted with the PCB (SCU-S03), then this PCB is automatical­
ly recognised by the boiler's automatic control unit.
Note
On removing this PCB, the boiler will show error code
prevent this error, an auto-detect must be carried out after remov­
ing this PCB.
For information on carrying out an auto-detect, see: Carrying out
an auto-detect, page 53
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
.

14.3.3 Connection options for the PCB (SCU-X02)

It is possible to connect a 230 VAC three-way valve or a 24 VAC three-
way valve to the SCU-X02 PCB.
Note
The starting position of the three-way valve can be modified using
a jumper at Jp1.
Control of external three-way valve (3wV) 230 VAC
The external three-way valve (230 VAC) can be used when connecting an
indirectly heated calorifier.
1. Connect the three-way valve to the X3 terminals of the connector:
N = neutral
C = central heating
D = domestic hot water
Control of external three-way valve (3wV) 24 VAC
The external three-way valve (24 VAC) can be used when connecting an
indirectly heated calorifier. The neutral position of the three-way valve can
be set using parameter .
14 Appendix
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