DORCHESTER DR-FC 120, Installation, Comissioning And Maintenance Instructions

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58 Instruction manual DR-FC
11
gis
• Confirm with .After confirming, the water
heater enters "ONmode".
Note
If the preset temperature is higher than the current
water temperature, then the water heater might not
immediately start the operating cycle. To prevent
excessively frequent switching on and off, there is a
heating margin. The standard setting for this margin is
4°C. The water heater starts heating when the water
temperature is 4°C colder than the SETPOINT.
We refer to this margin as the hysteresis. The service
and maintenance engineer can adjust this
setting
(12.2 "Setting the hysteresis") .
11.4.2 Setting water temperature during
ON mode
The water temperature can also be directly adjusted
when the water heater is in "ONmode". Simply use:
•
to increase the value;
• to decrease the value.
• Confirm with .
11.5 Week program
Using the week program, you can set the water
temperature for the days and times you wish.
If the water heater is running under a week program,
then this is indicated on the display by the text
PROG
on the first line (see the figure). The second line shows
the time of day, the day of the week and the
temperature. The third line shows the next switching
time of the week program and the programmed
temperature. The fourth line shows the text
PROGRAM ACTIVATED
.
The water heater's default week program switches the
water heater on every day at 00:00 hours and off at
23:59 hours. The default water temperature setting is
65°C.
If you wish, you can change every setting in the
standard week program of the water heater.
When the week program is running, if the water
temperature becomes too low, then the water heater
will run through the operating cycle
(2.3 "Water heater
operating cycle") , then return to the week program.
The following topics are covered here:
•
Starting and stopping the week program
• Changing the water heater's standard week
program
• Adding times to a week program
• Deleting times from a week program
11.6 Starting and stopping the week
program
The week program can be started up from any other
operating mode, as follows:
1.
:
WEEK PROGRAM
|
START OPERATION
Confirm with .
A week program can be shut down simply by
activating a different operating mode, for example the
"ON mode".
11.7 Changing the water heater's standard
week program
Note
First fill-in the desired week program on the
supplied week program card.
A week program is made up of a number of
programmable periods in which you can have the
water heater switch on and off. A period consists of:
•
switch-on time: day of the week, hours and
minutes:
• switch-off time: hours and minutes;
• the water temperature setting;
• on/off setting for a program-controlled pump.
Note
The switch-off time must always be followed by a
switch-off time on the same day of the week. A
maximum of
three periods per day may be
programmed. You can program a maximum of 21
periods.
Call up the menu for the week program as follows:
•
:
WEEK PROGRAM
|
PROGRAM OVERVIEW
.
Confirm with .
SETPOINT
» 65ÉC
ON
13:45 Thursday 65ÉC
Tset»65ÉC
PROG
07:55 Monday 64ÉC
MO 08:00 Tset 75ÉC
PROGRAM ACTIVATED
WEEK PROGRAM
START OPERATION
^»PROGRAM OVERVIEW
È