Mitsubishi Electric PAC-SIF051B-E, Installation And Operation Manual

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9
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.5 5-6 (OUT6)) , and turn the Dip SW2-3 to ON. (Booster heat-
er 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-IF062/063B-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 thermistor THW5 (optional parts PAC-TH011TK-E(5 m) or PAC-TH011TKL-E(30 m)) on the DHW tank. Note
that PAC-IF063B-E comes with THW5. (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 local 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 FTC unit itself))
TOTAL current of the pump(s) MUST be 4A.
The total current allowed for parts except pumps is 3A. (otherwise, the fuse on the FTC PCB will blow. )
<1 Phase>
Description Power
supply Total capacity
(BH1 + BH2) Breaker Wiring
Booster heater
(Primary circuit) 3~ 400V
50Hz
9 kW (3 kW + 6 kW) 16 A 2.5 mm²
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
Wiring
circuit
breaker
or
Isolating
switch
L
N
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L
N
ECB
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB
To control
board
ECB for
booster
heater
(Primary circuit)
ECB for
immersion
heater
(DHW tank)
Power
supply
Power
supply
FTC (Master)
L
N
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L1
L2
S1
S2
S3
Outdoor unit
S1
S2
S3
TB2
TB1
L2
L3
ECB
Wiring
circuit
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB
To control
board
ECB for
booster
heater
(Primary circuit)
ECB for
immersion
heater
(DHW tank)
FTC (Master)
N
L3
L1
L
N
Power
supply
3N~
400V
50Hz
Power
supply
Power
supply
<Fig. 1 (1 phase)> <Fig. 2 (3 phase)>
M
N
Mixing valve