Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

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7 Optional functions
SMGB0070 rev. 1 - 08/2011
203
7
7.1.2 Automatic summer switch-off
At higher outside temperatures it doesn’t make sense to keep heating the building. The YUTAKI S system will switch the
heating off when the daily average outdoor temperature of the previous day rises above the Summer Switch-Off Activation
Temperature.
Variables used:
CODE Description Default Value Range Steps Units
8-001 Auto Summer Switch-OFF Disable Disable/Enabled - -
8-102 Summer Switch-Off Tº 22 10~25 1 ºC
8-103 Switching On differential 0.5 0~3 0.5 ºC
It will calculate the average of last 24 hours.
In the first 24 hours it will not check anything. After that it will adjust the average with the new sample and check the con -
ditions every 5 minutes.
N O T E
• Deactivate space heating when checking conditions. User may activate it using on/off button, which will restart
the function and reset the average.
• The checking conditions are:
Condition
Action
Average > Summer Switch-OFF Tº [8-102] HEATING OFF
Average < (Sum. Sw-Off Tº [8-102] – Sw.differential [8-103]) HEATING ON
N O T E
• Average is an internal variable of controller
• A switching differential [8-103] is applied.
• Function must remember status (ON or OFF). When second condition is activated, status will be restored.
• When changing Summer Switch OFF Tº or switching ON differencial or Run/Stop any circuit (1&2) the average
calculation will restart.
If circuits are forced OFF, a notification icon will appear on the LCD.