Wagner & Co RATIOfresh 250 Technical Information Installation Instructions page 15

Table 7 Value Level – HOT WATER SETTINGS
(use the < and > keys to select the desired menu item, use the
with the key)
Designation Description
PUMP 1 – MODE
Software can be used to set the operating mode of the primary circuit
pump and is used for manual operation of the pump.
[AUTO]
The min. output indicates the pump capacity used to control the hot
P 1 MIN CAPACITY
water in standby and circulation. This value cannot be less than 10 %
because the pump bearings no longer have a sufficient amount of water
[010] %
available for use with a value below 10 %.
TEMP. HOT WATER
Setting the desired nominal hot water temperature
Nominal: [45] °C
TEMP.
Setting the desired circulation flow temperature concerning the
CIRCULATION
temperature measured as the hot water temperature sensor
Nominal: [45] °C
This is the temperature maintained by the system if no water is
withdrawn and the circulation function is not active.
The lowest set value of 10 °C ensures protection from frost for the
TEMP. STANDBY
RATIOfresh freshwater station.
Nominal: [40] °C
The current buffer cylinder temperature must be higher than the
nominal standby temperature by at least 5 K or the hold function is
deactivated.
Setting the tap volume max. occurring in this system on a regular basis.
For example, if you use a shower with 10 l/min and two water faucets
each with 5 l/min, the max. tapping volume to be expected on a regular
basis amounts to approx. 20 l/min. Set [20] l/min as the max. tap
MAX. USAGE
volume. The selected tapping volume range (here: 0 l/min to 20 l/min)
is divided by the control into 10 time slots and an internal control value
Nominal: [20] l/min
is adjusted for each time window during the adaptation process.
Selecting an unfavorable max. tap volume value can thus adversely
affect the control performance. The actual max. output of the station is
not reduced by this setting.
Use the < and > keys to select and then confirm returning to the menu level with the ■ key.
END
Table 8 Value Level – SETTINGS: CIRCULATION
Designation Description
Setting the mode for the hot water circulation. The "continuous" mode
controls the circulation continuously and adjusts circulation to the
specified temperature difference between hot water outlet and
circulation return.
The "time" mode starts the control of the circulation pump as soon as
the withdrawal of water is detected (brief opening of a tapping point
MODE
suffices). The control ends if the "post-event time" (see below) has
[time]
expired after the hot water has been withdrawn.
Programming the time slots makes it possible to combine both control
modes: When selecting "time" and programming the time slots, the
circulation control functions outside of the time window according to
the detection of the withdrawal of water and within the time window
according to the temperature difference.
PUMP 2 – MODE
Software can be used to set the operating mode of the circulation
pump and is used for the manual operation of the pump.
[AUTO]
P2 – MIN
This setting indicates the min. pump capacity used to control the
CAPACITY
circulation. The value must be adjusted depending on used pump type
and check valve.
[010] %
The follow-up time is only adjustable if the "time" circulation mode is
FOLLOW-UP TIME
selected. Set the time in minutes for which the circulation time is to run
[010] min
after the end of a tapping.
EN-RATIOfresh-250-400_TI-MA-0809-11214900
key to switch to the setting level, use < and > to change values, save
Range Base value Your value
OFF
ON AUTO
AUTO
10 – 70 % 10 %
25-70 °C 50 °C
25-70 °C 45 °C
10-70 °C 40 °C
20 to
20 l/min
80 l/min
Range Base value Your value
continuous
continuous
time
OFF
ON AUTO
AUTO
10 – 70 % 10 %
0 – 255 min 10
15