SYX66x Commissioning Guide
V1.10.3 300117
Page 15 of 61
4.4
Connection Diagram: Compensated Day/Night Frost Protection
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Space Sensor provides room influence of heating flow temperature during the day
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Room Sensor provides frost protection is required during holiday periods.
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Two Room sensors may be fitted to provide an average temperature.
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The HWS Control and its options are optional. IO-1RM is required if HWS output to be used.
•
The boilers if required serve the Heating and HWS Function (if linked)
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Boiler Flow and Return Sensors are needed for boiler control
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VT Flow Sensor required for Valve Compensation Control
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Time Extend and Holiday features apply
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0-10v Output option supported for the VT Valve, boiler demand or boiler set point control.
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Heating is time controller between day and night levels. Day Extend will hold day levels.
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Observe KP10 sensor type polarity and GND connection see note Page 6
1 2
3 4
5 6
7 8
9 10
11 12
13 14 15 16 17 18
12vDC 0v
Space
1
Space
2
L
N
Boiler 1
Boiler 2
Pump
Open
Close
HWS
IO-
1RM
Outside
Temp
Heating
Return
Boiler
Flow
Optional
items
VT Flow
0-10v
Out
Day
Ext
Aux
Input
27 28 29 30 31 32 33 34 35 36
SYX66x
-ve
-ve
