Daikin ECFWER6 [7/44] Automatic cooling heating switching mode based on the air temperature
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Daikin ECFWER6 [7/44] Automatic cooling heating switching mode based on the air temperature

Daikin ECFWER6 [7/44] Automatic cooling heating switching mode based on the air temperature
ECFWEB6+ECFWER6
Microprocessor controller for fan coils
4PW17551-1B
Installation and operation manual
4
The controller selects the cooling or heating mode based
on the temperature of the air compared to a neutral
temperature interval (neutral zone) centred on the set
value of the thermostat.
The neutral zone is a parameter related to the function
"automatic cooling/heating switching mode based on the
air temperature".
The neutral zone is a temperature interval astride the set
temperature. When the air is warmer than the top limit of
the neutral zone, the cooling mode is selected.
When the air is cooler than the lower limit of the neutral
zone, the heating mode is selected.
The following figure illustrates an example with:
Neutral zone = 5°C
Set room air temperature = 21°C
For temperatures above 23.5°C the cooling operating
mode is selected
For temperatures below 18.5°C the heating operating
mode is selected.
On the controller, the range of the neutral zone is 2°C or
5°C and can be defined by setting microswitch number 4
(see "Setting the microswitches" on page 10).
The time function is used to start the fan at medium
speed for 2 minutes at regular intervals (every 10
minutes) once the room temperature has reached the
level as set on the thermostat. It ensures the constant
monitoring of the air temperature in the room. It is only
used in summer and only if the enabling signal of the
water temperature probe is positive.
The time function cycle is also executed when the
controller is powered (first start-up or voltage reset).
Automatic cooling/heating switching mode
based on the air temperature
When this function is selected, the
temperature range of the thermostat refers to
the values indicated in figure 3, both for
cooling and for heating.
In this type of configuration, the input for the
centralised cooling/heating switching mode is
disabled.
Selecting the range of the neutral zone
AI
R
<18.5°C =
>23.5°C =
21
21
°C21°C
Neutral zone
Position of microswitch no. 4
Range of the neutral zone
ON 2°C
OFF 5°C
Time function
The thermostat and the operating mode
selector switch are disabled when the time
function is in use.
The time function can be used only for units
without valves and only in summer.
The time function is not foreseen for the
ECFWER6 versions.
1B_I+OM_4PW17551-1B.book Page 4 Wednesday, October 5, 2005 9:18 AM

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