Twin Thermostat Operation With Weather Compensation; Modulation Of Dhw Generation - Keston Qudos 28s User, Installation And Servicing Instructions

WD420/3/2007
5.1
SEPARATE CH & DHW DEMAND WITH ( OPTIONAL ) WEATHER COMPENSATION
Q28S
BOILER
LOW VOLTAGE CONNECTOR
SOL. TS FLOW
DHW
SENSOR SENSOR SWITCH
SENSOR
2
1 2 1 1 2 NO
5.2
SEPARATE CH & DHW DEMAND WITH ( OPTIONAL ) DHW SENSOR CONTROL
Q28S
BOILER
LOW VOLTAGE CONNECTOR
OPEN
SOL. TS FLOW
DHW
THERM
SWITCH
SENSOR SENSOR SENSOR
2
1 2 1 1 2 C 2
NO
Installation & Servicing Instructions
Chapter 4 : Installation

Twin Thermostat Operation with Weather Compensation

ANALOG
OPEN
EXTERNAL
DEMAND
THERM SENSOR
CH1
0v
C 2 1 1 2 E

Modulation of DHW generation

C.10C.0.09.00.0
EXTERNAL SENSOR
ANALOG
EXTERNAL
DEMAND
SENSOR
CH1
0v
1 1 2 E
The Keston Qudos 28s & Qudos 28sP Boilers
ORANGE
BLUE
M
ORANGE
BLUE
M
ORANGE
BLUE
ORANGE
BLUE
( OPTIONAL )
L
N
E
GREY
BROWN FROM CH
CONTROLS
CH ZONE
VALVE
GREY
BROWN FROM DHW
CONTROLS
DHW ZONE
VALVE
C.10C.0.09.00.0
EXTERNAL SENSOR
( OPTIONAL )
L
N
E
GREY
BROWN FROM CH
M
CONTROLS
CH ZONE
VALVE
GREY
BROWN FROM DHW
M
CONTROLS
DHW ZONE
VALVE
DHW SENSOR
( OPTIONAL )
TANK
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