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7
Water to Water Heat Pump (WTW)
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.
Upon completion of the operation the system stops all the op-
erations except the Freeze stat. operation.
For Floor dry up function, the target flow temp. of Zone1 is the
same as that of Zone2.
Disconnect wiring to external inputs of room thermostat, demand control, and outdoor thermostat, or the target flow temperature
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
Max. target temp.
temperature
Max. temp. period
<Energy monitor settings>
1. General description
End user can monitor accumulated(* 1 ) 'Consumed electrical energy' and 'Delivered heat energy' in each operation mode(* 2 ) on
the main remote controller.
* 1 Monthly and Year to date
* 2 - DHW operation
- Space heating
Refer to the menu tree in "Main Settings Menu" for how to check the energy, and "7.3 DIP switch functions" for the details on
DIP-SW setting.
Either one of the following 2 methods is used for monitoring.
Note: Method 1 should be used as a guide. If a certain accuracy is required, the 2nd method should be used.
(1) Calculation internally
Electricity consumption is calculated internally based on the energy consumption of refrigerant and brine circuit, electric
heater, water pump(s) and other auxiliaries.* 3
Delivered heat is calculated internally by multiplying delta T (Flow and Return temp.) and flow rate measured by the factory
fitted sensors.
Set the electric heater capacity and water pump(s) input and specs of additional pump(s) supplied locally. (Refer to the menu
tree in "Main Settings Menu")
Booster heater1 Booster heater2
EHGT17D-YM9ED
*1 Change setting to 1 kW when connecting optional immersion heater "PAC-IH01V2-E".
*2 "***" displayed in the energy monitor setting mode means the factory fitted pump is connected as Pump 1 so that the input is
automatically calculated.
When anti-freeze solution (propylene glycol) is used for primary water circuit, set the delivered energy adjustment if necessary.
For further detail of above, refer to the menu tree in "Main Settings Menu".
B-252
Symbol Description
Set the function to ON and power on the system using the main
a
remote controller, and the dry up heating operation will start.
b
Sets the increase step of the target flow temperature.
c
Sets the period for which the same target flow temperature is maintained. 1 to 7
d
Sets the decrease step of the target flow temperature.
e
Sets the period for which the same target flow temperature is maintained. 1 to 7
f
Sets the target flow temperature at the start and the finish of the operation. 20 to 60
g
Sets the maximum target flow temperature.
h
Sets the period for which the maximum target flow temperature is maintained. 1 to 20
3 kW
6 kW
Target flow temp.
(°C )
45
(g)
40
35
(c)
30
(f)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Immersion
Pump1 * 2
heater * 1
***(factory fitted
0 kW
pump)
(h)
(d)
(e)
(b)
Days
Option/
Range
On/Off
+1 to +10 ºC
−1 to −10 ºC
20 to 60
Pump2
Pump3
When additional pumps supplied
locally are connected as Pump2/3,
change setting according to specs
of the pumps.
Unit Default
— Off
+5
day 2
−5
day 2
ºC
30
ºC
45
day 5
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