CALEFFI 161010 Manuel page 35

S1
R2 = open
R3 = closed
The controller monitors the room thermostat signal (RT).
If the room thermostat requests heat, the pump (R1) and R4 are ac-
tivated to request heating. The temperature measured by probe S2 is
monitored.
The controller calculates a nominal flow temperature based on the out-
side temperature (S1) and the selected outside compensated tempera-
ture curve. The mixing valve is regulated to ensure that S2 reaches and
maintains the flow temperature.
The controller is protected by a non-adjustable safety shut-down. The
mixing valve is closed if the temperature measured by S2 reaches or
exceeds 90 °C.
The warning symbol appears on the display and the Lightwheel
flashes yellow. R1 and R4 are turned off if the temperature measured by
S2 reaches or exceeds 95 °C. The Lightwheel
If the TMax option is activated, a lower value can be set for the safety
shut-down. The symbol appears on the display and the Lightwheel
flashes yellow if the temperature of S2 exceeds (TMax - 5K). R1 and R4
are turned off if the temperature of S2 exceeds TMax by more than 5 K.
The Lightwheel flashes red.
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If the Cooling option is activated, the mixing valve is regulated to en-
sure that S2 reaches and maintains the cooling temperature TCool. As
an option, contact S7 can be used for remote control of the heating /
cooling function.
Contact open = cooling
Contact closed = heating
If the RH% control option is active, the regulator also monitors the
S2
humidity sensor. If the humidity sensor is in an alarm state, the cooling
function is stopped and the warning symbol appears.
Flow
Terminal assignment
R1
S1
S2
S3/RTA12=
Return
RT
S5/TS10 = Dew point detector (optional)
S6
S7
R1
R2
R3
R4
PWM A = not enabled
System 2 settings and statistics menu
User code for menu access: 0322
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flashes red.
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System
Curve
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TMin
TMin
= Outside temperature probe
= Heating circuit flow
Return probe or remote regulation (optional)
= Room thermostat
= Grundfos Direct Sensor™ RPS pressure switch (optional)
= Remote contact for heating /cooling centralisation (optional)
= Pump
= Open mixing valve
= Close mixing valve
= Generator activation contact (voltage-free low-voltage relay).
If the generator has a contact with a voltage > 30 V, use
the auxiliary microswitch contacts of the mixer connected to
the free terminals on the 230 V -AX/AX side of the terminal
board.
Factory Area Meaning
setting
1 1, 2, 3, 4 System selection
0,8 0,3 ... 3,0 Heating curve
Yes Yes, No Minimum temperature option for the
heating circuit
25 °C 15 °C ... 60 °C Minimum temperature of the heating
circuit
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