Menu 3 - Bosch Worcester 2000 Series Installation And Maintenance Instructions Manual

8.2.3

Menu 3

▶ Press the ( key and * key at the same time until L.1 appears.
▶ Press arrow key  until L.3 is displayed.
▶ To confirm the selection: press OK key.
▶ Selecting and setting the service function.
Service function
3-b1 Maximum approved heat output
3-b2 Time interval between stopping and
starting the burner in heating mode
3-b3 Temperature interval for switching the
burner off and back on
3-C1 Maximum released DHW output
3-C4 Turbine signal delay
3-C5 Delay of DHW mode (solar mode)
3-C6 Time interval between stopping and
restarting the burner for DHW heating
(only in comfort mode and summer
mode)
3-C8 Thermal disinfection up to draw-off
point
3-CA DHW mode
3-d6 Overrun time of the heating pump in
heating mode
Table 23 Menu 3: factory settings
Worcester 2000 – 6 721 814 551 (2019/09)
The basic settings are depicted as highlighted in the following table.
Settings/adjustment range
• GC2000iW 25 C : 50 ... 80 %
• GC2000iW 30 C : 50 ... 68 %
• 3 ... 10 ... 60 minutes
• -15 ... -6 ... -2 K ( °C)
• 50 ... 100 %
• 2 ... 16 × 0.25 seconds
• 0 (not active) ... 50 seconds
• 0 ... 30 minutes
• OFF: switched off
• ON: switched on
• 0: comfort mode, the device is continually kept at
the set temperature.
• 1: ECO mode, only heat-up to the selected
temperature when hot water is being drawn.
• 2: (not available)
• 3: (not available)
• 1 ... 3 ... 60 minutes
• 61: 24 hours
Settings in the service menu
Remark/restriction
▶ Set heat output in percent.
▶ Measure gas flow rate.
▶ Compare measured result with the setting
tables ( page 77). Correct the setting in
the case of any deviation.
The time interval specifies the minimum waiting
time between switching on the burner and
switching it on again.
If a weather-compensated heating controller is
connected, this setting is optimised by the
heating controller.
The difference between the current flow
temperature and the set flow temperature until
the burner is switched on.
If a weather-compensated heating controller is
connected, this setting is optimised by the
heating controller.
On natural gas devices:
▶ Set heat output in percent.
▶ Measure gas flow rate.
▶ Compare measured result with the setting
tables ( page 77). Correct the setting in
the case of any deviation.
The delay prevents sudden changes in the water
supply pressure from causing the burner to
briefly operate although no water is drawn off.
DHW mode will be suppressed until the DHW
temperature sensor detects that the water
preheated by solar energy has reached the
desired DHW temperature.
▶ Set the DHW mode delay according to the
system conditions.
After DHW is drawn off, the DHW heating
remains disabled for this period.
If too much water is drawn off, the required
temperature may not be reached.
▶ Only draw off enough water to allow the DHW
temperature of 70 °C to be reached.
▶ Perform thermal disinfection
( Instructions for the user).
Short waiting time in comfort mode, when
domestic hot water is extracted. The device
therefore switches on, even if no domestic hot
water is extracted.
The pump overrun begins at the end of the heat
demand by the heating controller.
47