System Set Up; Dip Switch Functions - Mitsubishi Electric ecodan EHPT20Q-VM2EA Installation Manual

4
Installation
Outdoor unit powered via cylinder unit
<1 phase>
Power
Wiring
supply
Earth
circuit
~/N
leakage
breaker
230 V
circuit
or
50 Hz
breaker
Isolating
*1
switch
Outdoor unit
S1
Isolating switch
S2
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 Capacity
Booster heater (Primary circuit) 230V N~ 50 Hz 2 kW
Cylinder unit power supply
Cylinder unit input capacity
Main switch (Breaker)
Wiring Cylinder unit power supply (including earth cable)
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 flexible cable. (Design 60245 IEC 57)
Cylinder unit power supply cables shall not be lighter than polychloroprene sheathed flexible 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.
16
Cylinder unit
Tightening torque
TB1
TB1 2.0 ~ 2.5 Nm
TB2 2.0 ~ 2.5 Nm
L
ECB 1.3 ~ 1.7 Nm
N
earth 2.0 ~ 2.5 Nm
TB2
S1
S2
S3
ECB
For
L
booster
heater
(Primary circuit)
N
Breaker Wiring
16 A *2 *3 3 × 2.5 mm²
~/N 230 V 50 Hz
*2 20 A
3 × Min. 2.5
*4 4 × Min. 2.5
*5 230 V AC
*5 230 V AC
*5 24 V DC
5

System Set Up

5.1 DIP Switch Functions

Located on the FTC printed circuit board are 4 sets of small white switches
known as DIP switches. The DIP switch number is printed on the circuit board
next to the relevant switches. The word ON is printed on the circuit board and on
the DIP switch block itself. To move the switch you will need to use a pin or the
corner of a thin metal ruler or similar.
DIP switch settings are listed below in Table 5.1.1.
Before changing any switch settings, ensure the power supplies to both cylinder
unit and outdoor unit are turned OFF.
Before changing the DIP switch setting, confirm that the power supply earth
cable is securely connected and prevent the FTC from being applied with static
electricity (e.g. touch a case body etc.). Otherwise, it may cause a failure of the
FTC due to the static electricity.
DIP switch Function
SW1 SW1-1
—
SW1-2 —
SW1-3 —
SW1-4 —
SW1-5 —
SW1-6 —
SW1-7 —
SW1-8 Wireless remote controller WITHOUT Wireless remote controller WITH Wireless remote controller
SW2 SW2-1 Room thermostat1 input (IN1) logic change
Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open
SW2-2 —
SW2-3 —
SW2-4 —
Automatic switch to backup heat source operation
SW2-5 Inactive
(When outdoor unit stops by error)
SW2-6 —
SW2-7 —
SW2-8 —
SW3 SW3-1 Room thermostat 2 input (IN6) logic change
Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open
SW3-2 —
SW3-3 —
SW3-4 Electric energy meter WITHOUT Electric energy meter
SW3-5 —
SW3-6 2-zone valve ON/OFF control Inactive
SW3-7 —
SW3-8 Heat meter WITHOUT Heat meter
SW4 SW4-1 —
SW4-2 —
SW4-3 —
SW4-4 Indoor unit only operation (during installation work) *2 Inactive
SW4-5 Emergency mode (Heater only operation) Normal
SW4-6 —
Note: *1. For safety reasons, this function is not available for certain errors.
(In that case, system operation MUST be stopped and only the water circulation pump keeps running.)
*2. Space heating and DHW can be operated only in indoor unit, like an electric boiler. (Refer to "5.4 Indoor unit only operation". )
*3. If emergency mode is no longer required, return the switch to OFF position.
OFF ON
1
6
1
8
1
8
1
8
<Figure 5.1.1>
Default settings:
OFF ON
Indoor unit model
— — OFF
— — OFF
— — OFF
— — OFF
— — OFF
— — OFF
— — OFF
OFF
OFF
— — OFF
— — OFF
— — OFF
Active *1 OFF
— — OFF
— — OFF
— — OFF
OFF
— — OFF
— — OFF
WITH Electric energy meter OFF
— — OFF
Active OFF
— — OFF
WITH Heat meter OFF
— — OFF
— — OFF
— — OFF
Active OFF
Emergency mode (Heater only operation) OFF *3
— — OFF
<Table 5.1.1>
SW4
SW3
SW2
SW1
17