22
4.7 Wiring for 2-zone temperature control
Connect the pipe work and locally supplied parts according to the relevant circuit diagram shown “Local system” in Section 3, of this manual.
<Mixing valve>
Connect the signal line to open Port A (hot water inlet port) to TBO.2-3 (Open), the signal line to open Port B (cold water inlet port) to TBO.2-1 (Close), and the neutral
terminal wire to TBO. 2-2 (N).
<Thermistor>
▪ Do not install the thermistors on the mixing tank.
▪ Install the Zone2 flow temp. thermistor (THW8) near the mixing valve.
▪ The maximum length of the thermistor wiring is 30 m.
▪ The length of the optional thermistors are 5 m. If you need to splice and extend the wirings, following points must be carried out.
1) Connect the wirings by soldering.
2) Insulate each connecting point against dust and water.
1 2 3
N
L
FTC
(Main)
TBO.2
Close N Open
A
B
from mixing tank
to mixing tank
to Zone2 heat emitter
from Zone2 heat emitter
Motorized mixing valve
en
4. Electrical work
2. DIP switch
Turn DIP switch 3-6 ON.
3. 2-way valve 2a (for Zone1) / 2-way valve 2b (for Zone2)
Electrically wire 2-way valve 2a and 2b to the appropriate external output terminals. (Refer to "External outputs" in 4.5)
4.8 2-zone valve ON/OFF control
1. Pipe work
1. Zone1 2-way valve 2a (local supply)
2. Zone2 2-way valve 2b (local supply)
3. Water circulation pump 2 (local supply) *1
4. By-pass valve (local supply) *2
*1 Install according to system in the field.
*2 For safety protection, it is recommended to install a by-pass valve.
Note: Freeze stat function is deactivated whilst this control is ON. Use anti-freeze solution to
avoid freezing, if necessary.
4. Room thermostat connection
Opening /closing 2-way valve provides a simple 2-Zone control.
Flow temperature is common for Zone1 and 2.
Heating operation mode
Zone1
Zone2
Room temp. control
(Auto adaptation) *3
● Wireless remote controller (option)
● Room temperature thermistor (option)
● Main remote controller (remote position)
● Wireless remote controller (option)
Compensation curve or flow temp. control
● Wireless remote controller (option) *4
● Room temperature thermostat (local supply)
● Wireless remote controller (option) *4
● Room temperature thermostat (local supply)
*3 Ensure to install the room thermostat for Zone1 in main room since the Room temp. control for Zone1 is prioritized.
*4 The wireless remote controller can be used as a thermostat.
1
3
4
2
Zone1
Zone2
In DHW or heating operation, the commands in the table below can be used.
IN11
IN12
Meaning
OFF (open)
OFF (open)
Normal operation
ON (short)
OFF (open)
Switch-on recommendation
OFF (open)
ON (short)
Switch-off command
ON (short)
ON (short)
Switch-on command
4.9 Smart grid ready
4 3 2 1
TBI.3
IN11
IN12
Target temp.
+3
℃
DHW
Target temp.
50
℃
HEATING
55
℃
Summary of Contents for PAC-SIF051B-E
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