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3.3.10 Screed drying
The “screed drying” function enables the initiatiation of a special heating-up program
for a composition floor layer. Depending on the screed material used and its
composition, it is possible to adjust the parameters for starting time and heat-up,
holding and cool-down steps, before the function is activated.
The HPM controller offers the “screed drying” function only if a flow temperature
sensor is assigned to the heating circuit, or if the system diagram “50090” (heat pump
with communication + HC1: unmixed without a pump) has been loaded. After this
system diagram has been loaded, the “screed drying” function will appear in the
display automatically. If a different system diagram was loaded, or if it is desirable to
start the function from normal operation, the following steps must be performed:
Press “OK” in the default display. Select “heating circuits” using “DOWN” and enter
the menu by pressing “OK” (in system diagrams using more than one heating circuit,
select heating circuit x and enter by pressing “OK”). Select “functions” using
“DOWN” and press “OK” to enter the menu. The following parameters will be
displayed:
Table 3.4: Parameters to adjust and activate
When screed drying is active, the flow temperature setpoint of the current step is
controlled through control of the valve in the heating circuit and demand to the heat
pump, respectively.
If the difference between the setpoint and current value exceed a certain limit for a
given time, an error message is generated. The reaction to a power failure will consist
of a step being repeated, or of the function being started again or cancelled. The
monitoring to be used can be set using the additional parameters in this menu.
In the “status” menu of the heating circuit, and in the menu “service / screed drying”,
it is possible to view further information about the current step when the function is
activated (e.g.: Setpoint temperature 35°C, step status: heating-up).
At the end of the screed drying function, the operating mode of the heating circuit
switches to weather-dependent setpoint calculation if an outdoor sensor is assigned. If
system diagram “50090” was choosen, no outdoor sensor is assigned and the heating
circuit goes into the operating mode “not active/OFF” (no demand to heat pump).
Additional functions can be found in Part II of the manual; “Parameter description”.
Name
Info text
Range / default values
active
activate the function
0 - 1; default: 0
InitTemp
initial temperature
2 – 50 °C; default: 25 °C
dwellInitTime
dwell time initial temperature
0 – 10 days; default: 1 day
rate of heat-up
1 – 50 K per day; default: 5 K per day
rateTmp-
rate of cool-down
1 – 50 K per day; default: 5 K per day
maxTemp
maximum temperature
2 – 65 °C; default: 45 °C
dwellMaxTemp
dwell time maximum temperature
0 – 10 days; default: 3 days
