7.15.3
PREHEATING FOR FLOOR
MENU
>
FOR SERVICEMAN
>
SPECIAL FUNCTION
>
PREHEATING FOR FLOOR
During initial start-up and when water temperature is low, it is important that the
water is heated gradually. Or it may result in concrete floors cracking due to rapid
temperature change.
T1S
sets the heat pump’s leaving water set temperature in preheating for floor
mode.
dT1SH
sets the temperature difference between the heat pump’s leaving water set temperature (T1S) and the heat pump’s
leaving water temperature (T1) above which the heat pump provides heated water to the floor heating loops. When T1S –
T1 ≥ dT1SH the heat pump provides heated water to the floor heating loops.
t_fristFH
sets the duration of preheating for floor mode.
The operation of the unit during preheating for floor mode is illustrated in Figure 3-7.49.
Figure 3-7.49:
Preheating for floor
Abreviations:
t_interval_H: Compressor re-start delay in space heating mode. (Refer to Part 3, 7.6 “HEAT
MODE SETTING Menu”).
Whilst the preheating for floor operation is running, the number of minutes that it has been running for and the heat
pump’s leaving water temperature are displayed on the user interface. During the preheating for floor operation all
buttons except
OK
are inactivated. To exit the preheating for floor operation, press
OK
and then select
YES
when prompted.
Refer to Figure 3-7.50.
Figure 3-7.50:
Preheating for floor screens
Before floor heating, if large a amount of water remains on the floor, the floor may be warped or even rupture during floor
heating operation, in order to protect the floor, floor drying is necessary, during which the temperature of the floor should
be increased gradually.
12.2 PREHEATING FOR FLOOR
Preheat for floor is
running for 25 minutes.
Water flow temperature is 20°C.
Figure 3-7.48:
Preheating for floor menu
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