Outputs; Wiring For 2-Zone Temperature Control - Mitsubishi Electric Ecodan EHST20 serie Para El Instalador

5
System Set Up

Outputs

name terminal block Connector item
OUT1 TBO.1 3-4 CNP1
OUT2 TBO.1 5-6 —
OUT3 TBO.1 7-8 —
OUT4 TBO.1 9-11 CNV1
TBO.1 12-13
OUT5 —
TBO.1 13-14
OUT6 — CNBH 1-3
OUT7 — CNBH 5-7
OUT8 TBO.2 11-12 —
OUT9 TBO.2 9-10 CNIH
OUT11 TBO.2 1-2 —
OUT12 TBO.2 3-4 —
OUT10 TBO.1 1-2 —
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
N L N L N L N
1 2 3 4 5 6 7 8 9 10 11
TBO.1
OUT10 OUT1 OUT2 OUT3 OUT4
Wiring specification and field supply parts
item name Model and specifications
External Outputs Use sheathed vinyl coated cord or cable.
output wire Max. 30 m
function Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø0.65 mm to ø1.2 mm

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 temp. to the THW6 (TBI. 2-7 and 2-8) terminals.
Connect the thermistor to monitor the Zone1 return temp. to the THW7 (TBI. 2-9 and 2-10) terminals.
Connect the thermistor to monitor the Zone2 flow temp. to the THW8 (TBI. 2-1 and 2-2) terminals.
Connect the thermistor to monitor the Zone2 return temp. to the THW9 (TBI. 2-11 and 2-12) terminals.
The maximum length of the thermistor wiring is 5 m. Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each hot water temperature
through zones.
If the wiring is too long, bundle it with a strap to adjust the length.
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. 1-14 (Open), the signal line to open Port B (cold water inlet port) to tBO. 1-12 (Close) ,
and the neutral terminal wire to tBO. 1-13 (n).
N
FTC4
TBO.1
12 13 14
Close N Open
23
Water circulation pump 1 output (Space heating & DHW)
Water circulation pump 2 output (Space heating for Zone1) OFF
Water circulation pump 3 output (Space heating for Zone2) OFF
3-way valve 1 output
Mixing valve output
Booster heater 1 output
Booster heater 2 output
Booster heater 2+ output
Immersion heater output
Error output
Defrost output
Boiler output
L N L
N L
12 13 14
1 2
TBO.2
Close Open
OUT11
OUT5
L
from mixing tank
to mixing tank
OFF On
OFF ON
ON
ON
Heating DHW
Close
Stop
Open
OFF ON
OFF ON
OFF ON
OFF ON
Normal Error
Normal Defrost 230V AC 0.5 A Max
OFF ON
N L N L N L
3 4 5 6 7 8 9 10 11 12 13 14
OUT12 OUT9 OUT8
note:
1. When the cylinder unit 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 3-4 and CnP1 at the
same time.
4. Connect an appropriate surge absorber to OUt10 (tBO.1 1-2) depending on the
load at site.
to Zone2 heat emitter
A
Motorized mixing valve
B
from Zone2 heat emitter
Signal/Max current Max. total current
230V AC 1.0 A Max 3.0 A (a)
230V AC 1.0 A Max
230V AC 1.0 A Max
230V AC 0.1 A Max
230V AC 0.1 A Max
230V AC 0.5 A Max (Relay)
230V AC 0.5 A Max (Relay) 3.0 A (b)
230V AC 0.5 A Max (Relay)
230V AC 0.5 A Max (Relay)
230V AC 0.5 A Max
non-voltage contact
• 220 - 240V AC (30V DC)
—
0.5 A or less
• 10 mA 5V DC or more