Mitsubishi Electric Ecodan FTC4 Скачать руководство пользователя

Страница: 9 / 72

3. System

Parts name

Requirement

Booster heater

General

Consider necessity and capacity of booster heater to meet the following points.

(1) Heating capacity and flow water temperature should always be sufficient.

(2) System can increase the temperature of the stored water in tank to inhibit legionella bacterium growth.

(Note) System without neither booster heater or immersion heater, ‘Legionella Prevention Mode’ is NOT available.

(3) Water circuit should not be frozen during defrost operation.

Control Power for
Contactor

Current: 0.5A Max , Power supply: 230V AC
* Use a relay.

Separate power
for Heater

Install an earth leakage circuit breaker (ECB) for heater, separate from control power (See Fig.1 and Fig.2).
* When using two booster heaters, booster heater 1 capacity must be less than that of booster heater 2.
When using a single booster heater, connect to BH1 (TBO.3 1-2 (OUT6)) , and turn the Dip SW2-3 to ON. (Booster heater
capacity restriction)

Heater capacity/Breaker/wiring (recommended)
<1 Phase>

<3 Phase>

Description

Power
supply

Total capacity
(BH1 + BH2)

Breaker Wiring

Booster heater
(Primary circuit)

~/N 230V
50Hz

2 kW (2 kW + 0 kW) 16 A

2.5 mm²

6 kW (2 kW + 4 kW) 32 A

6.0 mm²

* When installing a booster heater with the capacity of bigger than shown above, select an appropriate size breaker and

cable (diameter) based on the maximum possible electric current.

Safety device

(1) Use an overheat protection thermostat (manual reset type) (to detect unusual temperature increase/heating up without water).

Protection device operating temperature must be above 80 °C. Protection device should not operate quickly, but water
circuit must not boil even when heater(s) overshoot.
(Reference value) Thermostat operation temperature used in our Cylinder unit and Hydrobox : 90 °C ± 4 °C

(2) Connect a pressure relief valve on the primary circuit side.

Immersion heater

General

* Consider necessity and capacity of immersion heater to meet the following points.

(1) Heating capacity and flow water temperature should always be sufficient.

(2) System can increase the temperature of the stored water in tank to inhibit legionella bacterium growth.
(Note) System without neither booster heater or immersion heater can not select ‘Legionella Prevention Mode’.

Control Power for
Contactor

Current: 0.5A Max , Power supply: 230V AC
* Use a relay.

Separate power
for heater

Install an earth leakage circuit breaker (ECB) for heater, separate from control power (See Fig.1 and Fig.2).
*ECB is built-in in PAC-IF052B-E.
Heater capacity/Breaker/wiring (recommended)

Description

Power supply

Capacity

Breaker

Wiring

Immersion heater (DHW tank) ~/N 230V 50Hz

3 kW

16 A

2.5 mm²

* When installing an immersion heater with the capacity of bigger than shown above, select an appropriate size breaker

and cable (diameter) based on the maximum possible electric current.

Safety device

(1) Install the enclosed thermistor THW5 on the DHW tank.

（

Microcomputer detecting temperature for protection: 80 °C)

(2) Use a built-in direct cut-off thermostat (manual reset type).

Protection device operating temperature must be above 80 °C. Protection device should not operate quickly, but water
circuit must not boil even when a heater overshoots.
(Reference value) Thermostat operation temperature used in our Cylinder unit : 85 °C ± 5°C

(3) Connect a pressure relief valve on the sanitary water side.

Mixing valve

Current: 0.1 A Max (If over 0.1 A you must use a relay)
Power supply: 230V AC
Connect earth cable, if there is one.

Type: Refer to the right figure.

Expansion Vessel (Primary circuit side)
Expansion Vessel (Sanitary water side)

When the water circuit is closed, select the expansion vessel according to water quantity of the water circuit.
* Follow the national regulations.

Limits of TOTAL electric current when con-

necting field supply parts

Option 1. (Power supply from outdoor unit)

TOTAL current requirement MUST be 3A (otherwise, the fuse on the outdoor unit PCB will blow).

Option 2. (Independent power supply (i.e. from the FTC4 unit itself))

TOTAL current of the pump(s) MUST be 3A.
The total current allowed for parts except pumps is 3A. (otherwise, the fuse on the FTC4 PCB will blow. )