Electrical Connection - Mitsubishi Electric ecodan EHPT20Q-VM2EA Installation Manual

4
Installation

4.5 Electrical Connection

All electrical work should be carried out by a suitably qualifi ed technician. Failure to comply with this could lead to
electrocution, fi re, and death. It will also invalidate product warranty. All wiring should be according to national wiring
regulations.
WARNING
When confi rming the operation of the ECB, make sure that the ECB can be turned ON/
OFF by the power lever before pressing the test button. If the ECB cannot be turned
ON/OFF by the power lever, stop using the ECB and replace it.
CAUTION
This product contains electrostatic-sensitive components that can be damaged if
handled incorrectly. To prevent any electrostatic damage, ensure you are electrically
grounded / earthed in order to discharge any possible static electricity build-up.
Breaker abbreviation Meaning
ECB Earth leakage circuit breaker for booster heater
TB1 Terminal block 1
TB2 Terminal block 2
⑥
⑦ ① ② ④③ ⑤
⑦ ① ②⑥ ④③ ⑤
Pull out the control box and
run wires shown as dotted
lines behind it.
(Refer to page 14)
Note:
Install an earth
TB1
TB2
cable longer than
other cables.
① ②
ECB
ECB
Power
lever
<Figure 4.5.1>
22
• The outdoor unit can only be powered via
Cylinder unit.
• Connections should be made to the terminals as
indicated in the fi gures to the left below.
• The wires ( ① ~ ⑦ ) MUST NOT be bundled
together with other wires having different number.
(Refer to <Figure 4.5.1>)
Ⓐ Locally supplied wiring should be inserted
through the inlets situated on the top of the
cylinder unit. (Refer to <Table 3.3>.)
Ⓑ Wiring should be fed down the left hand side of
the control and electrical box and clamped in
place using clips provided.
Ⓒ The wires should be inserted individually
through the cable inlets on the control board
(Figure 4.5.1).
③ Remote sensor wire
④ Signal input cable
⑤ Wireless receiver (option) (PAR-WR51R-E) and
Wi-Fi interface (option) (PAC-WF010-E, MAC-567IF-E,
MAC-587IF-E) cable
⑥ Output cable
Ⓓ Connect the power cable for the Cylinder unit to
TB1. ... ①
① Power cable
Ⓔ Connect the outdoor unit – cylinder unit
connecting cable to TB2. ... ②
② Cylinder unit - Outdoor unit cable
Ⓕ Connect the power cable for the booster heater
to ECB. ... ⑦
⑦ Power cable for Booster heater
• Make sure that ECB is ON. *1
• On completion of wiring, ensure main controller
cable is connected to the relay connector.
Note: *1 When the ECB is turned off, push down the power
lever without pressing the test button.
4
Installation
Outdoor unit powered via cylinder unit
<1 phase>
Power
Wiring
Earth
supply
circuit
leakage
~/N
breaker
circuit
230 V or
breaker
50 Hz
Isolating
*1
switch
Outdoor unit
S1
Isolating
S2
switch
S3
Power
Wiring
supply circuit
~/N breaker
230 V or
50 Hz
Isolating
switch
<Figure 4.5.2>
Electrical connections 1 phase
*1. Current sensitivity 10 mA, operating time 0.1 s.
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.
Description Power supply
Booster heater (Primary circuit) 230V N~ 50 Hz
Cylinder unit power supply
Cylinder unit input capacity
Main switch (Breaker)
Cylinder unit power supply (including earth cable)
Wiring
Wiring No. × size (mm²)
Cylinder unit - Outdoor unit (including earth cable)
Cylinder unit L - N
Circuit rating Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
*2. A breaker with at least 3.0 mm contact separation in each pole shall be provided.
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*3. Use a breaker with an over-current protection function.
*4. Max. 15 m
*5. The values given in the table above are not always measured against the ground value.
Note:
1. Wiring size MUST comply with the applicable local and national codes.
2. Cylinder unit/outdoor unit connecting cables shall not be lighter than polychloroprene
sheathed fl exible cable. (Design 60245 IEC 57) Cylinder unit power supply cables shall
not be lighter than polychloroprene sheathed fl exible cable. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. The lack of the
power supply capacity may possibly cause chattering.
Cylinder unit
Tightening torque
TB1
TB1 2.0 ~ 2.5 Nm
L
TB2 2.0 ~ 2.5 Nm
N
ECB 1.3 ~ 1.7 Nm
earth 2.0 ~ 2.5 Nm
TB2
S1
S2
S3
ECB
L For booster
heater
(Primary circuit)
N
Capacity Breaker Wiring
2 kW 16 A 3 × 2.5 mm
*2 *3
~/N 230 V 50 Hz
20 A
*2
3 × Min. 2.5
4 × Min. 2.5
*4
*5 230 V AC
230 V AC
*5
24 V DC
*5
2
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