3. System
3.3 Third step (Functions setting)
DHW tank
Immersion
heater
Booster
heater
BH
function
System diagram
Thermistor
Reference
section
Remarks
Present
Absent
Present
For heating
and DHW
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present
Present
Present
For heating
and DHW
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present
Absent
Present
For heating
only
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
1. ‘Legionella
Prevention
Mode’ cannot
be selected in
this system.
Present
Absent
Absent
—
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
1. ‘Legionella
Prevention
Mode’ cannot
be selected in
this system.
2. Please make
sure water cir-
cuit not to get
frozen during
defrost.
Present
Present
Present
For heating
only
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Present
Present
Absent
—
THW1: Flow water temp.
THW2: Return water temp.
THW5: Tank water temp.
4.4
4.5
5.3
Absent
Absent
Present
—
THW1: Flow water temp.
THW2: Return water temp.
4.4
4.5
5.3
Absent
Absent
Absent
—
THW1: Flow water temp.
THW2: Return water temp.
4.4
4.5
5.3
1. Please make
sure water cir-
cuit not to get
frozen during
defrost.
* The use of two 2-way valves can perform same function as a 3-way valve.
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (
*
)
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (
*
)
Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (
*
)
Booster heater
Heat emitter
THW1
THW2
Heat emitter
THW1
THW2
Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (
*
)
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
3-way valve (
*
)
Booster heater
Heat emitter
DHW tank
THW5
THW1
THW2
Immersion heater
3-way valve (
*
)