Connecting External Input/Output - Mitsubishi Electric EHST20-Serie Installationshandbuch

5
System Set Up

5.2 Connecting external input/output

CN01 CN3C
5 3 1 1 3
FTC3
CNV1
CNP1
CNBC CNBHT
1 5
1 3
1 3
TBO.1 TBO.2
2 4 6 8 10 12 14 2 4 6 8 10 12 14
1 3 5 7 11 13
９ 1 3 5 7 9 11 13
<Figure 5.2.>
external input
name terminal block Connector item
IN TBI.2 5-6 —
IN2 TBI.2 7-8 CN2F
IN3 — —
IN4 TBI.2 3-4 —
IN5 TBI.3 7-8 —
*. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be reduced.
Wiring specification and field supply parts
Model and specifications
item name
External input External input Use sheathed vinyl coated cord or cable.
function signal wire Max. 0 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to .25 mm²
Non-voltage "a" contact signals
Switch
Remote switch: minimum applicable load DC 2V, mA
external output
name terminal block Connector
OUT TBO. -2 CNP
OUT2 TBO. 3-4 —
OUT3 — —
OUT4 TBO. 7-9 CNV
OUT5 — —
OUT6 TBO.2 5-6 CNBH -3
OUT7 TBO.2 7-8 CNBH 5-7
OUT8 TBO.2 9-0 —
OUT9 TBO.3 5-6 CNIH
OUT0 — —
OUT TBO.2 -2 —
OUT2 TBO.2 3-4 —
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
N L N L N L
TBO.1
1 2 3 4 5 6 7 8 9
OUT1 OUT2 OUT4
Wiring specification and field supply parts
Model and specifications
item name
External External Use sheathed vinyl coated cord or cable.
output output Max. 50 m
function signal wire Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to .25 mm²
Solid wire: ø 0.65 mm to ø.2 mm
Relay, etc. AC 230V signal 0.5 A or less
23
1 5
CNRF
SW2
SW4
8
1 6
LED1 1
SW1 SW3
8
LED3 8
2
CN22
1
2
1 CN2F
1
1
2
THW3
1
LED2
6
THW5
CNBH CNIHT CNIH
1
1 3 1 3
1 3 1 3 5 7 4
THW12
TBO.3
1
2
TH2
2 4 6 8 10 12 14
1
TH1 2
1 3 5 7 9 11 13
1
Room thermostat input
Flow switch input
—
Heat source OFF
Outdoor thermostat input (*1)
Solid wire: ø 0.65 mm to ø.2 mm
item
Water circulation pump1(AC) output (Space heating & DHW)
Water circulation pump2(AC) output (Space heating ONLY)
—
3-way valve output
—
Booster heater output
Booster heater2 output
Booster heater2+ output
Immersion heater output
—
Error output
Defrost output
TBO.2
10 111213 14 1 2 3 4 5 6
TBI.3
14
13
12
11
When connecting the terminals use the ring terminals and also insulate the
10
9
8
cables of adjoining terminals when wiring to terminal block.
7
6
5
4
3
2
1
TBI.2
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TBI.1
14
13
12
11
10
9
8
7
6
5
4
3
2
1
OFF (Open) On (Short)
Refer to SW2-1 (Page 22)
Refer to SW2-2 (Page 22)
— —
Normal Heat source OFF
Standard operation Heater operation
OFF
OFF
OFF
Heating
OFF
OFF
OFF
OFF
Normal
Normal
L N N L N L
L N L N
7 8 9 10 111213 14
OUT6 OUT7 OUT8 OUT11 OUT12
notes:
1. When connecting a pump with an electric current of ≥1A or multiple pumps,
use (a) relay(s).
2. do not connect pumps to both tBO.1 1-2 and CnP1 at the same time.
<When connecting field supply optional pumps please note the following>
Option 1. (Power supply from outdoor unit)
If the total current is ≥3A then the fuse on the OUTDOOR unit PCB will blow.
Option 2. (independent power supply)
If the total current for pumps is ≥2A the fuse on the cylinder unit (FTC3) PCB
will blow. the total current allowed for parts except pumps is 3A.
to avoid the fuses blowing please avoid having a total current of 3A or greater.
On Signal/Max current
ON AC230V .0A Max
ON AC230V .0A Max
— — —
DHW AC230V 0.A Max
— — —
AC230V 0.5A Max (Relay)
ON
AC230V 0.5A Max (Relay)
ON
AC230V 0.5A Max (Relay)
ON
AC230V 0.5A Max (Relay)
ON
— — —
Error AC230V 0.5A Max
Defrost AC230V 0.5A Max
L N
TBO.3
1 2 3 4 5 6
OUT9
7 8 9 10 111213 14