Mitsubishi Electric Ecodan EHST20 serie Para El Instalador página 42

5
System Set Up
<room temp Control (Heating)>
This function allows operational setting of flow temperature range from the Ecodan and
also the time interval at which the FTC4 collects and processes data for the auto adap-
tation mode.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the list
until Room temp. control (HEATING) is highlighted.
2. Press CONFIRM.
3. Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn by
pressing CONFIRM. See the table below for description of each setting.
4. Enter the desired number using the function keys and press CONFIRM.
Menu subtitle
Temp. control interval
Flow temperature range Minimum temp.
Maximum temp.
Heat pump thermo diff.adjust On/Off
Lower limit
Upper limit
*1 The minimum flow temperature that prohibits heat pump operation is 20ºC.
*2 The maximum flow temperature that allows heat pump operation equals to the maximum temperature set in the flow temp. range menu.
<Floor dry up function>
The Floor dry up function automatically changes the target hot water temperature
in stages to gradually dry concrete when this particular type of underfloor heating
system is installed.
1. Turn off the system using the main controller.
2. From the Operation settings in the service menu, use F1 and F2 buttons to
scroll through the list until Floor dry up function is highlighted.
3. Press CONFIRM to display the FLOOR DRY UP screen.
4. To change settings, press F4. For details on settings, refer to the table below.
5. To start the Floor dry up operation, press F1 button to check a box below
*1. Upon completion of the operation the system stops all the operations except
the Freeze stat. operation.
*2. For Floor dry up function, the target flow temp. of Zone1 is the same as that of
Zone2.
note:
• this function is not available when a PUHZ-FrP outdoor unit is connect-
ed.
• disconnect wiring to external inputs of room thermostat, demand control,
and outdoor thermostat, or the target flow temp. may not be maintained.
Functions
Floor dry up function
Flow temp. increase step
Flow temp.
(increase)
Increase interval
Flow temp. decrease step
Flow temp.
(decrease)
Decrease interval
Start & Finish
Target temperature Max. target temp.
Max. temp. period
41
Function
Selectable according to the heat emitter type and the mate-
rials of floor (i.e. radiators, floor heating-thick, -thin concrete,
wood, etc.)
To minimize the loss by frequent ON and OFF in mild out-
door ambient temp. seasons.
To set max. possible flow temp according to the type of heat
emitters.
To minimize the loss by frequent ON and OFF in mild out-
door ambient temp. seasons.
Prohibits heat pump operation until the flow temperature
drops below the target flow temperature minus lower limit
value.
Allows heat pump operation until the flow temperature rises
above the target flow temperature plus upper limit value.
Symbol Description
Set the function to ON and power on the system using the main controller,
a
and the dry up heating operation will start.
b Sets the increase step of the target flow temp.
c Sets the period for which the same target flow temp is maintained.
d Sets the decrease step of the target flow temp.
e Sets the period for which the same target flow temp is maintained.
f Sets the target flow temp. at the start and the finish of the operation.
g Sets the maximum target flow temp.
h Sets the period for which the maximum target flow temp. is maintained.
Room temp. control (HEATING) screen
Range Unit
10 - 60 mins.
25 - 45 ºC
35 - 60 ºC
On/Off —
−9 - −1 ºC
+3 - +5 ºC
Target flow temp.
(°C )
(h)
45
(g)
40
35
(b)
(c)
30
(f)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Days
Option/Range Unit
On/Off
+1 - +10
1 - 7
−1 - −10
1 - 7
25 - 60
25 - 60
1 - 20
Default
10
30
50
On
−5
+5
(d)
(e)
Default
— Off
ºC +5
day 2
ºC −5
day 2
ºC 30
ºC 45
day 5