Return Boost Cut-Out Temperature Differential; Return Boost Mode; Pump Pa Speed Control - Bosch Worcester TDS 300 Installation And Operating Instructions Manual

EXPERT MENU (FOR QUALIFIED TECHNICIANS ONLY)

9.5.10 Return boost cut-out temperature differential

Menu: Expert menu > Settings > 2: Back-up htg. > DWU1 valve switch-off temp. differential
When the set cut-out temperature differential between the reserve cylinder and the heating system
return is reached, the valve switches over and the flow is not directed through the cylinder but diverted
to the boiler.
The minimum difference from the cut-in temperature differential is 3 K.
Setting range
3 - 17 K

9.5.11 Return boost mode

Menu: Expert menu > Settings > 2: Back-up htg. > DWU1 valve operating mode
In Auto mode, the valve allows fluid to flow from I to II when the conditions for doing so are met.
If the option On is selected, the valve allows fluid to flow from I to II.
If the option Off is selected, the valve allows fluid to flow from I to III.
Setting range
On, Off, Auto

9.5.12 Pump PA speed control

Menu: Expert menu > Settings > A: 2nd collector array > PA pump speed control
WARNING: risk of damage to system due to pump failure.
B If a pump with internal electronic circuitry is connected, deactivate the speed control
function on the programmer.
The speed control function improves the efficiency of the solar heating system by keeping the
temperature difference within the set cut-in temperature differential.
Setting range
On, Off
66
Default setting
3 K
Default setting
Auto
Default setting
on
New setting
New setting
New setting
6 720 644 593 (2010/04)