EN-7
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.
Control Power for
Contactor
Current: 0.5A Max. , 10mA Min. , Power supply: 230V AC
* Use a relay.
Connect the surge absorber according to the load at site.
Separate power for
Heater
Install an earth leakage circuit breaker for heater, separate from control power.
* When using two booster heaters, booster heater 1 capacity must be less than that of booster heater 2.
When using a single booster heater, use booster heater 1.
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.
Control Power for
Contactor
Current: 0.5A Max. , 10mA Min. , Power supply: 230V AC
* Use a relay.
Connect the surge absorber according to the load at site.
Separate power for
heater
Install an earth leakage circuit breaker for heater, separate from control power.
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.
Water circulation pump Connect a pump via relay.
Current: 0.5A Max. , 10mA Min.
Power supply: 230V AC
Connect the surge absorber according to the load at site.
Adjust the pump speed so that the flow rate in the primary circuit is appropriate for the outdoor unit installed see the table and figures below.
Outdoor heat pump unit
Water flow rate range [L/min]
Packaged model PUZ-WM50
6.5 - 14.3
PUZ-WM60
8.6 - 17.2
PUZ-WM85
10.8 - 25.8
PUZ-WM112
14.4 - 32.1
PUZ-HWM140
17.9 - 40.1
Split model
PUHZ-SW75
10.2 - 22.9
PUHZ-SW100
14.4 - 32.1
PUHZ-SW120
20.1 - 45.9
PUHZ-SW160
23.0 - 63.1
PUHZ-SW200
28.7 - 71.7
PUHZ-SHW80
10.2 - 22.9
PUHZ-SHW112
14.4 - 32.1
PUHZ-SHW140
17.9 - 40.1
PUHZ-SHW230
28.7 - 65.9
* The water velocity in pipes should be kept within certain limits of material to avoid erosion corrosion and excessive noise generation.
(e.g. Copper pipe: 1.5m/s)
3.4. Fourth step (Water circuit parts installation)
* Make sure to check the followings for your safety when designing a system. These are the minimum requirement for the safe use of FTC2BR unit.
3. System
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
en
Summary of Contents for PAC-IF033B-E
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