Mitsubishi Electric EHST20 Series Manuel d'installation télécharger pdf (Page 24)

N L

TBO.1

12 13 149 10 116 7 83 4 51 2

TBO.2

OUT5

OUT1 OUT2 OUT3 OUT4

N L N L N L N L

OUT10

N L

OUT11

N L

OUT12

N L

OUT9

N L

OUT8

OpenClose

System Set Up

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 ow switch) / Flow switch 3 (Zone2 ow switch)

Connect ow 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 ow switches 2 and 3. (Refer to “Dip switch functions” in 5.1.)

3. Thermistor

Connect the thermistor to monitor the Zone1 ow 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 ow 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).

FTC4

TBO.1

Close N Open

from mixing tank

to mixing tank

to Zone2 heat emitter

from Zone2 heat emitter

Motorized mixing valve

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.

Item Name Model and specications

External

output

function

Outputs

wire

Use sheathed vinyl coated cord or cable.

Max. 30 m

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

Wiring specication and eld supply parts

Outputs

Name Terminal block Connector Item OFF ON Signal/Max current Max. total current

OUT1 TBO.1 3-4 CNP1 Water circulation pump 1 output (Space heating & DHW) OFF ON 230V AC 1.0 A Max 3.0 A (a)

OUT2 TBO.1 5-6 — Water circulation pump 2 output (Space heating for Zone1) OFF ON 230V AC 1.0 A Max

OUT3 TBO.1 7-8 — Water circulation pump 3 output (Space heating for Zone2) OFF ON 230V AC 1.0 A Max

OUT4 TBO.1 9-11 CNV1 3-way valve 1 output Heating DHW 230V AC 0.1 A Max

3.0 A (b)

OUT5

TBO.1 12-13

— Mixing valve output Stop

230V AC 0.1 A Max

TBO.1 13-14 Open

OUT6 — CNBH 1-3 Booster heater 1 output OFF ON 230V AC 0.5 A Max (Relay)

OUT7 — CNBH 5-7 Booster heater 2 output OFF ON 230V AC 0.5 A Max (Relay)

OUT8 TBO.2 11-12 — Booster heater 2+ output OFF ON 230V AC 0.5 A Max (Relay)

OUT9 TBO.2 9-10 CNIH Immersion heater output OFF ON 230V AC 0.5 A Max (Relay)

OUT11 TBO.2 1-2 — Error output Normal Error 230V AC 0.5 A Max

OUT12 TBO.2 3-4 — Defrost output Normal Defrost 230V AC 0.5 A Max

OUT10 TBO.1 1-2 — Boiler output OFF ON

non-voltage contact

• 220 - 240V AC (30V DC)

0.5 A or less

• 10 mA 5V DC or more

—

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

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Mitsubishi Electric EHST20 Series Manuel d'installation Page 24

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