Wiring For 2-Zone Temperature Control - Mitsubishi Electric EHSD-MEC Installation Manual

5
System Set Up
Outputs
Name Terminal block Connector Item
OUT1 TBO.1 1-2 CNP1
OUT2 TBO.1 3-4 —
OUT3 TBO.1 5-6 —
OUT14 — CNP4
OUT4 TBO.2 4-6 CNV1
TBO.2 1-2
OUT5 —
TBO.2 2-3
OUT6 — CNBH 1-3
OUT7 — CNBH 5-7
OUT8 TBO.4 5-6 —
OUT9 TBO.4 3-4 CNIH
OUT11 TBO.3 3-4 —
OUT12 TBO.3 5-6 —
OUT13 TBO.4 1-2 —
OUT15 TBO.3 7-8 —
OUT10 TBO.3 1-2 —
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
*1 For 2-zone temperature control.
*2 For 2-zone valve ON/OFF control.
N L N L N L
TBO.1 1 2 3 4 5 6 TBO.2
OUT1 OUT2 OUT3
Wiring specification and local supply parts
Item Name
External output function Outputs wire
Note:
1. When the hydrobox is powered via outdoor unit, the maximum grand total current of (a)+(b) is 3.0 A.
2. Do not connect multiple water circulation pumps directly to each output (OUT1, OUT2, and OUT3). In such a case, connect them via (a) relay(s).
3. Do not connect water circulation pumps to both TBO.1 1-2 and CNP1 at the same time.
4. Connect an appropriate surge absorber to OUT10 (TBO.3 1-2) depending on the load at site.
5. Stranded wire should be processed with insulation-covered bar terminal (DIN46228-4 standard compatible type).

5.3 Wiring for 2-zone temperature control

1. Water circulation pump 2 (Zone1 water circulation pump) / Water circulation pump 3 (Zone2 water circulation pump)
Electrically wire water circulation pumps 2 and 3 to the appropriate output terminals. (Refer to "Outputs" in 5.2.)
2. Flow switch 2 (Zone1 flow switch) / Flow switch 3 (Zone2 flow switch)
Connect flow switches 2 and 3 to the appropriate terminals. (Refer to "Signal inputs" in 5.2.)
Set DIP switches 3-2 and 3-3 according to the functions of individual flow switches 2 and 3.
(Refer to "DIP switch functions" in 5.1.)
3. Thermistor
Connect the thermistor to monitor the Zone1 flow temperature to the THW6 (TBI. 2-3 and 2-4) terminals.
Connect the thermistor to monitor the Zone1 return temperature to the THW7 (TBI. 2-5 and 2-6) terminals.
Connect the thermistor to monitor the Zone2 flow temperature to the THW8 (TBI. 2-7 and 2-8) terminals.
Connect the thermistor to monitor the Zone2 return temperature to the THW9 (TBI. 2-9 and 2-10) terminals.
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.
4. Motorized mixing valve
Connect three wires coming from the motorized mixing valve to the appropriate terminals referring to "Outputs" in 5.2.
Note: 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).
Water circulation pump 1 output
(Space heating/cooling & DHW)
Water circulation pump 2 output
(Space heating/cooling for Zone1)
Water circulation pump 3 output
(Space heating/cooling for Zone2) *1
2-way valve 2b output *2
Water circulation pump 4 output (DHW) OFF
3-way valve (2-way valve 1) output
Mixing valve output *1
Booster heater 1 output
Booster heater 2 output
Cooling signal output
Immersion heater output
Error output
Defrost output
2-way valve 2a output *2
Comp ON signal
Boiler output
N L N L N
1 2 3 4 5 6 TBO.3 1 2 3 4 5 6 7 8
OUT4 OUT10 OUT11OUT12 OUT15
Close Open
OUT5
Model and specifications
Use sheathed vinyl coated cord or cable.
Max. 30 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.25 mm² to 1.5 mm²
Solid wire: 0.25 mm² to 1.5 mm²
OFF ON
OFF ON
OFF ON
OFF ON
ON
Heating DHW
Close
Stop
Open
OFF ON
OFF ON
OFF ON
OFF ON
Normal Error
Normal Defrost
OFF ON
OFF ON
OFF ON
L N L N L N L N L
TBO.4 1 2 3 4
OUT13 OUT9
How to use TBO.1 to 4
Conductor
Connect them using either way as shown above.
Signal/Max. current
230V AC 1.0A Max.
230V AC 1.0A Max.
230V AC 1.0A Max.
230V AC 1.0A Max.
230V AC 0.1A Max.
230V AC 0.1A Max.
230V AC 0.5A Max. (Relay)
230V AC 0.5A Max. (Relay)
230V AC 0.5A Max.
230V AC 0.5A Max. (Relay)
230V AC 0.5A Max.
230V AC 0.5A Max.
230V AC 0.1A Max.
230V AC 0.5A Max.
non-voltage contact
· 220-240V AC (30V DC)
0.5A or less
· 10mA 5V DC or more
N L
5 6
OUT8
Tool
Conductor
Outline view Top view
<Figure 5.2.2>
N L
FTC
1 2 3
TBO.2
Close N Open
from mixing tank
A
B
to mixing tank
Max. total current
4.0A (a)
3.0A (b)
—
Tool
to Zone2
heat emitter
Motorized mixing
valve
from Zone2
heat emitter
20