andrews COMBIflo 100/300, Installation, Operation And Maintenance Manual

Page: 29 / 76

ANDREWS COMBIfl o 27 GB
4.10.1 INTEGRATION WITH APPLIANCE CONTROLS
The appliance controls have the facility to activate an immersion heater as a backup for the normal generation
of DHW. e.g. The immersion heater would be automatically switched on if the appliance was unable to generate
DHW for any reason
Refer to page 14 for a suggested diagram on how to wire an integrated immersion heater.
Example setup: An optional purchased AGU2.5 “module” (setup as module 3) would require to be defi ned under
parameter 6022 as “Multifunctional”. The output QX23 and other settings would be defi ned according to the fol-
lowing table:
4.11 MIXING VALVE & ACTUATOR CONTROL
The AGU2.5 “Module” can be used to control a 230V valve actuator to regulate the fl ow temperature of the heat-
ing circuit to which it is connected. The actuator uses 3-point control to open and close the valve.
In the above example the setup for “module 1” would be “Heating circuit 1”. If the temperature of HC1 needed to
be increased, the controls would supply 230V through QX21 (Y1) to open the valve until the temperature rise was
detected by the sensor B1. If the temperature of HC1 needed to be decreased the controls would supply 230V
through QX22 (Y2) to close the valve until the temperature fall was detected by sensor B1.
Precise temperature control is maintained by alternating 230V via QX21 & QX22 until the desired temperature is
maintained, at which point no voltage maintains the valve position.
Menu Line
no
Setting
Confi g
(QX23)
6038 El imm heater DHW K6
To confi gure as a backup heater
DHW storage
tank
5060
5061
5062
Substitute
Time program 4 / DHW
External thermostat
To confi gure as a summer heater
DHW storage
tank
5060
5061
5062
Summer
Time program 4 / DHW
External thermostat
To confi gure as an independently controlled
heater
DHW storage
tank
5060
5061
5062
Always
Time program 4 / DHW
External thermostat