Hitachi RHUE-3AVHN, Руководство по обслуживанию

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117
Electrical wiring
SMGB0066 rev.0 - 12/2009
Controller pack
Service Manual
4
12
11
10
Boiler
ON/OFF
TERMINAL
BLOCK A
dHW time clock •
It is possible to connect an external time clock to the System Controller to provide time-of-day switching of the DHW storage.
The input can be configured so that heating of the DHW storage tank is blocked (disabled) on either an open circuit or closed
circuit condition.
P24 Configuration of Tariff/Timer Input
Note that the Tariff/Timer input (terminals 10 & 11) can be used for DHW Time Switching OR Tariff-Switching, not both.
P24 open Circuit on terminals 10/11 Closed Circuit on terminals 10/11
0 Tariff/Timer Input is ignored
1 Tariff/Timer input is used for Heat Pump blocking
2 Tariff/Timer input is used for Heat Pump blocking
3 DHW is blocked DHW is enabled
4 DHW is enabled DHW is blocked
TErMInAl
BloCK C
Timer input
11
10
Tariff-switching device •
If a tariff-switching device (load shedding management) is provided by the electricity utility, it can be used to prevent the
heat pump switching on, and the System Controller will use the boiler instead to satisfy the heating requirements (bi-valent
systems only). The input can be configured so that the heat pump is blocked (disabled) on either an open circuit or closed
circuit condition.
P24 Configuration of Tariff/Timer Input
Note that the Tariff/Timer input (terminals 10 & 11) can be used for DHW Time Switching OR Tariff-Switching, not both.
P24 open Circuit on terminals 10/11 Closed Circuit on terminals 10/11
0 Tariff/Timer Input is ignored
1 Heat Pump is enabled Heat Pump is blocked
2 Heat Pump is blocked Heat Pump is enabled
3 Tariff/Timer input is used for DHW time clock
4 Tariff/Timer input is used for DHW time clock
TERMINAL
BLOCK C
Tariff input
11
10
Temperature sensors •
All sensors used are of type NTC 20K (at 25°C).
• The outdoor sensor (T EXT) is used for the OTC control, frost protection, summer switch-off, and bi-valent system
management.
• The DHW sensor (T DHW) is used to control the domestic hot water storage tank.
• The supply sensor (T SUP) is used to control the water temperature from the heat sources. Please see hydraulic
diagrams for sensor positioning.
• The mixed supply sensor (T MIX) is used in systems with a mixing valve (CONF 4 & 5 only) and should be positioned
after the mixing valve and the circulation pump.
• The return water sensor (T RET) is used to control the heat pump return temperature protection and should be
positioned on the return pipe to the heat pump.