Connection Possibilities For The Pcb (Scu- X03) - REMEHA Quinta Pro 30 Installation And Service Manual

Quinta Pro 30 - 45 - 65 - 90 - 115
X4
X3
SCU-X03
X1 X2
T002038-B
09/06/2011 - 123157-AF
n 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 p34.
The three-way valve is connected to the X4 terminals of the
connector. The three-way valve is connected as follows:
4 N = neutral
4 L = live (24 AC)
4 C = common (Central heating or DHW)
n Position of the reversal valve (JP1)
The position of the three-way valve can be set using a jumper at
JP1.
4 Jumper 1: The settings for central heating and sanitary hot water
are the default settings.
4 Jumper 2: The settings for central heating and sanitary hot water
are reversed.
4.9.7. Connection possibilities for the PCB (SCU-
X03)
The control PCB SCU-X03 can control a modulating central heating
pump. Depending on the make and type of pump, the pump can be
controlled by a 0-10 V, 4-20 mA or PWM signal. The speed of the
pump is modulated, based on the signal received from the boiler.
For correct connection of the pump, see the documentation
supplied with the pump.
n Connect on/off contact
Connect the on/off contact of the central heating pump to the
connector X1.
CAUTION
Do not use the on/off contact to interrupt the power supply
to the pump.
n Connect central heating pump
The control system of the central heating pump is connected to
connector X2.
4. Installation
41