sauter Equitherm EQJW 125, User Manual

Page: 65 / 74

EQJW 125: Heating controller
Technical data
64
7001029003 A
© Fr. Sauter AG
14.2 Overview of main functions
The room temperature connection is enabled in the SERVice level. A room
temperature sensor is required. The influence of the room temperature
connection can be adjusted in the SERVice level. Maximum change of T
F
due
to the room temperature connection:
±
30 K.
The frost protection function intervenes if the controller is in Off mode, and if
the frost protection function has been enabled in the SERVice level. In
addition, the temperature must have fallen below the frost protection limit.
The frost protection limit is 3°C for the outdoor temperature. The frost
protection function is turned off if the outdoor temperature is higher than 4°C.
When the frost protection function intervenes, a flow temperature of +10°C is
controlled.
The pump anti-jamming protection function is enabled in the SERVice level.
At 00:00 hours daily, the pump is switched on for 60 seconds if it was not
operated during the previous 24 hours. This function is active in all modes
except manual mode.
The maximum and minimum setpoint values for the flow temperature are
limited. If a calculated setpoint value for the flow temperature is obtained
which is beyond the limit, the limit temperature is controlled. The limit value is
set in the SERVice level. In manual mode, the flow temperature control is not
active and there is consequently no flow temperature limitation. If the frost
protection function is active, the flow temperature limitation is turned off.
In manual mode, the pump and the valve can be controlled separately. The
adjustment is menu-guided if manual mode has been enabled. Manual mode
is enabled in SERVice mode. In the ex-works settings, manual mode is 'not
enabled'.
Thanks to the automatic switch-off feature, the heating controller saves
energy with no loss of comfort wherever possible. The following possibilities
are available for switching off the heating controller:
a) EQJW 125 is in back-up mode
b) summer/winter limit OFF
c) TA TRs (if T
A
T
Rs
– 1 K switches controller on again)
A weekly switching programme with a maximum of 48 switching commands
and a yearly switching programme with a maximum of 20 switching commands
are available. The minimum switching intervals are 10 minutes or 1 day
respectively. The operating mode from the weekly and yearly switching
programmes with the lower energy consumption has priority. An 'empty'
switching programme is interpreted as normal mode. The yearly switching
programme is enabled in the SERVice level. In the ex-works setting, the yearly
Room temperature
connection
Frost protection
Pump anti-jamming
protection
Limitation of flow
temperature
Manual mode
Automatic switch-
off
Switching
programmes