Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

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7 Optional functions
SMGB0070 rev. 1 - 08/2011
206
7.1.6 Electrical heater or boiler emergency mode
To use the electrical heater or boiler in the event of outdoor unit failure, apply additional setting to IU setting
• DSW4-4:ON –> Heater/Boiler Emergency enabled ON
• DSW4-4:OFF –> Heater/Boiler Emergency disabled OFF
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Conditions for Activation
• Heating Mode is enabled
• Electric Heater or Boiler is allowed by user selection
• Water temperature (Two) < Water Temperature target (Ttwo)
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Conditions for Disabling
When Emergency Heater or Boiler is enabled, water calculation is based on the difference between water outlet (Two) (for
Heater) or Water outlet3 (Two3) (for Boiler) and water target (Ttwo)
Conditions for disabling:
When any of Conditions a,b,c,d is fulfilled.
a. Measured outlet temp value targeted
b. Outlet water temp set at Max water range temp by installer
c. Thermo OFF by Room Thermostat
d. Indoor unit alarm
N O T E
• Water pump1 (primary) will be activated with electric heater.
• Water pump3 will be activated with boiler
• If Heater emergency mode is activated, the Hot sanitary water electric heater will be activated in the same way
for emergency mode
Additional complementary disable functions:
• Step will be forced to 0 (heater and boiler OFF) in any of the following conditions. This change will occur regardless of
minimum ON time:
1 DSW4-4:OFF
N O T E
When emergency operation, the signal from outdoor units has no learned, the ambient temperature is conside -
red at 10ºC (fixed) and water calculation (in case of Point or gradient) has calculated at 10ºC Outdoor temperatu -
re. It’s recommended to change to fixed water calculation when emergency mode.