Daikin EKHWMXB500CA [27/64] X operation
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Daikin EKHWMXB500CA [27/64] X operation

Daikin EKHWMXB500CA [27/64] X operation
3 x Operation
Daikin Control unit
RoCon mb
008.1446899_00 – 07/2019 – EN
Operating instructions
27
3. Confirm the selection with a brief push of the rotary button.
An overview is displayed.
4. Use the rotary button to select the "Delete" program.
5. Confirm the selection with a brief push of the rotary button.
The Daikin Altherma M ECH
2
O is restarted.
The "No Basic Configuration" message is displayed.
6. Set the rotary switch to the "Info"
position.
The "Basic Configuration Not Set" message is displayed.
7. Now it is possible to either carry out the settings individually
(a) or to automatically load the factory settings (b).
a) Press the rotary button briefly.
The parameter overview of the "Basic Configuration"
level is displayed, and the settings can be carried out
manually according to tab. 6-14.
b) Switch the Daikin Altherma M ECH
2
O off and then on
again.
After restarting the Daikin Altherma M ECH
2
O, a prompt
asking whether the standard configuration should be used
appears. If it is confirmed with "Yes", the default basic
configuration is loaded. If "No" is selected, the settings
must be carried out manually, see a).
More detailed explanations and possible setting values for this function can be
found in chap. 6.12.
After resetting to the factory settings using option 2 or
3, the system must be adjusted to the installation envi-
ronment again by the heating expert and all customer-
specific parameters need to be reset.
3.6.13 Screed program
The screed program is used exclusively for the specified drying
of newly created screed for floor heating. Here, the heat gen-
erator is operated over several days in accordance with a spec-
ified temperature profile (the basis for the preset temperature
profile is the recommendation of the surface heating federal as-
sociation for screed curing heating).
After entering the technician code, temperatures and the duration
of the screed program can be set freely in the "Configuration"
rotary switch position
in the "HC Configuration" level in the
parameter [Screed Program].
The screed program is a special function and is not interrupted
by any other operating mode. It can only be activated by the
heating expert for the direct heating circuit and/or optionally
connected mixed heating circuits. It must be activated separately
for every heating circuit.
Before starting the screed program, the parameters
[Interlink fct] and [Room thermostat] must be deacti-
vated.
During a short-term power failure, a previously acti-
vated screed function is continued at the point of the
interruption.
After activation of the screed program (parameter [Screed] = On),
all weather-dependent control functions of the respective heating
circuit are switched off. The respective heating circuit works, as a
constant temperature control regardless of the operating mode
(switching times).
An already started screed program can be deactivated at any
time. After ending the screed program, the parameter is automat-
ically set to "Off", and the heating circuit continues to operate ac-
cording to the currently set operating mode.
Function heating
The function heating serves as proof of the production of defect
free work for the heating engineer. A prefabricated heating pro-
tocol related to Daikin floor heating can be found in the Internet
portal of Daikin.
In this sense, the function heating (identical with "Heating" in
EN 1264, section 5.2) is not considered as a heating process to
achieve workability of the screed. Generally, a special screed
curing heating and/or mechanical drying is required for this.
The heating of cement screeds should be carried out at the ear-
liest after 21 days and of anhydrite screeds after 7 days at the
earliest in accordance with the specifications of the manufac-
turer. The first heating begins with a T-HS of 25 °C that must be
maintained for 3 days. Afterwards, the heating is carried out with
the maximum set T-HS for the heating circuit (limited to max.
55 °C), which must be maintained for a further 4 days.
After the described heating process, it is not yet assured that the
screed has reached the required moisture content for workability
of the screed.
The moisture content in the screed must be checked by meas-
urement prior to laying the surface covering.
Procedure in accordance with EN 1264 Part 4:
For anhydrite and cement screeds, the heating circuits
must be leak tested by a water pressure test after com-
pletion. The leaktightness must be ensured immediately before
and during the laying of the screed. The height of the test pres-
sure is at least 1.3x the maximum permitted operating pressure.
Suitable measures must be taken if there is a risk of freezing,
e.g. use of antifreeze agents or heating the building. If antifreeze
agents are no longer necessary for the intended operation of the
system, the antifreeze agent must be removed by draining and
rinsing the system with at least 3 changes of the water.
t
1
Start temperature 25 °C
t
2
Maximum heating circuit temperature
t
V
T-HS
Z Duration of the screed function in days after starting the function
Fig. 3-18 Chronological sequence of the screed program during the
function heating
Screed curing heating
The drying process for the screed cannot be exactly predicted. If
there is a high degree of humidity, sometimes it can stop com-
pletely. The drying process can be speeded up by activating the
floor heating (screed curing heating) or measures such as me-
chanical drying.
Each screed curing heating must be ordered separately by the
client as an extra service in accordance with German con-
struction contract procedures (VOB). The workability of the
screed is a prerequisite for beginning the work of the top floor in-
staller, so that he can produce defect free work.

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