Mitsubishi EHST20C-VM2C - Page 37

L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
ECB2
N
L3
L1
L
N
L
N
37
<3 phase>
<Figure7-5>
Electrical connections 3 phase
Description Power supply Capacity (Indoor unit Ref.) Breaker Wiring
Booster heater (Primary circuit)
3~400V50Hz 9 kW 16 A
*
2
2.5 mm²
3~230V50Hz 9 kW 32 A
*
2
6.0 mm²
Immersion heater (DHW tank) ~/N230V50Hz 3 kW 16 A
*
2
2.5 mm²
Cylinderunitpowersupply ~/N230V50Hz
Cylinder unit input capacity
Mainswitch(Breaker)
*
2
16 A
Wiring
WiringNo.
×size(mm²)
Cylinderunitpowersupply 2 × Min. 1.5
Cylinderunitpowersupplyearth 1 × Min. 1.5
Cylinder unit - Outdoor unit
*
3
2 × Min. 0.3
Cylinder unit - Outdoor unit earth —
Circuit
rating
Cylinder unit L - N
*
4
230 V AC
Cylinder unit - Outdoor unit S1 - S2
*
4
—
Cylinder unit - Outdoor unit S2 - S3
*
4
24 V DC
*
2
 Abreakerwithatleast3.0mmcontactseparationineachpoleshallbeprovided.Useearthleakagebreaker(NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*
3
 Maximum120m
*
4
Thevaluesgiveninthetableabovearenotalwaysmeasuredagainstthegroundvalue.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.Indoorunit/outdoorunitconnectingcordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60245IEC57)
Indoorunitpowersupplycordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60227IEC53)
3. Install an earth line longer than power cables.
4.Pleasekeepenoughoutputcapacityofpowersupplyforeachheater.Insufcientpowersupplycapacitymightcausechattering.
For
booster
heater
(Primary circuit)
For
Immersion
heater
(DHW tank)
To control
board
*
1
Iftheinstalledearthleakagecircuitbreaker
does not have an over-current protection
function,installabreakerwiththatfunction
alongthesamepowerline.
Affixlabel Bthatisincludedwiththemanualsnear
eachwiringdiagramforcylinderunitandoutdoorunits.
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
3N~
400 V
50Hz
Earth
leakage
circuit
breaker
*
1,
*
2
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
circuit
breaker
*
1,
*
2
Power
supply
~/N
230 V
50Hz
Power
supply
~/N
230 V
50Hz
Outdoor unit
Cylinder unit
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
Powersupply
3~ 400 V50Hz(EH*T20*-YM*C)
3~ 230 V50Hz(EH*T20*-TM*C)
OCH570C