Bosch CFB 840, Инструкции по обслуживанию

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36 | DHW data
CFB 840 6 720 802 836 (2012/05)
B
Turn the rotary dial until submenu Range to appears.
B
Hold down button Display and turn the rotary dial until the required
value is shown.
Fig. 58 Setting the temperature range
B
Release Display to save your input.
B
Press Back to return to the next higher level.
11.3 Selecting switching optimisation
If the function Optimisation is selected, DHW heating will begin prior to
the actual start point. The control unit calculates the start time, taking
into consideration the residual heat within the cylinder and the lag of
heating for the heating circuits, so that the DHW temperature is reached
at the set time.
B
Call up the service level.
GENERAL PARAM. appears as the first main menu.
B
Turn the rotary dial until main menu DHW appears.
B
Press Display to call up a submenu.
B
Turn the rotary dial until submenu Optimisation
for starting appears.
B
Hold down button Display and turn the rotary dial until the required
value is shown.
Fig. 59 Selecting switching optimisation
B
Release Display to save your input.
B
Press Back to return to the next higher level.
11.4 Selecting residual heat use
If the function Residual heat utilisation is selected, the residual boiler
heat can be used to charge the DHW cylinder
B
Call up the service level.
GENERAL PARAM. appears as the first main menu.
B
Turn the rotary dial until main menu DHW appears.
B
Press Display to call up a submenu.
B
Turn the rotary dial until submenu Resid. heat use appears.
B
Hold down button Display and turn the rotary dial until the required
value is shown.
Fig. 60 Selecting residual heat use
B
Release Display to save your input.
B
Press Back to return to the next higher level.
11.5 Setting hysteresis
The function Hysteresis determines at how many Kelvin (K)drop below
the set DHW temperature the reheating of the cylinder begins.
B
Call up the service level.
GENERAL PARAM. appears as the first main menu.
B
Turn the rotary dial until main menu DHW appears.
B
Press Display to call up a submenu.
B
Turn the rotary dial until submenu Hysteresis appears.
B
Hold down button Display and turn the rotary dial until the required
value is shown.
Input range Factory setting
Range to 60 °C – 80 °C 60 °C
Table 73 Setting range Range to
Input range Factory setting
Optimisation
for starting
yes
no
no
Table 74 Setting range DHW optimisation
DHW Data
Range to
80
6 720 802 836-73.1TL
C
o
DHW Data
Optimisation
for starting
yes
6 720 802 836-74.1TL
Residual
heat
utilisation Explanation
yes If "Resid. heat use yes" is selected, the control unit
calculates the shutdown temperature of the burner and
the runtime of the primary pump via the residual boiler
heat, until the cylinder is fully heated. The burner is
switched OFF before the set domestic hot water
temperature is reached. The cylinder primary pump
continues to operate. The control unit calculates the
runtime of the primary pump (between 3 and 30
minutes) to heat the cylinder.
no If "Resid. heat use no" is selected, only little residual
heat is used. The burner runs until the set DHW
temperature is reached. The cylinder primary pump
runs on for 3 minutes after the burner has been
switched off.
Table 75 Residual heat utilisation
Input range Factory setting
Resid. heat use yes
no
yes
Table 76 Setting range Residual heat utilisation
This function is only possible, if function DHW
(
Æ
chapter 11.1, page 35) setting 4000-DHW Tank
has been selected.
DHW Data
Resid. heat use
no
6 720 802 836-75.1TL