33
© Baxi Heating UK 2012
“Basic adjustment”
“Programming”
14 -- 1
Start temperature max ºC
15 -- 5
Hysteresis dT in K
Time period (1…3) Start: min time
Time period (1…3) Stop: max time
Corresponding values in menu
“Basic adjustment”
“Programming”
14 -- 2
Start temperature max ºC
15 -- 5
Hysteresis dT in K
Time period (1…3) Start: min time
Time period (1…3) Stop: max time
Corresponding values in menu
“Basic adjustment”
“Programming”
---
Rotational speed min <100%
Corresponding values in menu
Thermostat
(Storage top)
Heating on (A3)
T[ºC]
t
dT
10k
TTh
40ºC
on
A3
off
11.0
Commissioning of solar controller
11.13
Rotational speed regulation
1. The solar circulation pump on 230V-outputs A1 and A2 can
be operated either in switch-mode (two-point controller) or in
a rotational speed regulated way. If the rotational speed
regulation is activated the pump power is adjusted by a
controller so that switch-on temperature difference “Storage
tank dTmax” is kept constant as much as possible. At lower
deviation of “Storage tank dTmax” the pump is operated with
the lowest power till the switch-off wave is reached.
11.14
Thermostat (heating)
1. The thermostat is an independent control circuit from the
storage loading. Thus, auxiliary heating of the top area of the
storage cylinder is made possible.
The output A3 will be:
• Switched on, when the temperature falls below the adjusted
start level.
• Switched off, when the temperature reaches the adjusted
start level + hysteresis.
11.15
Thermostat (cooling)
1. In order to optimise the energy yield, it could be useful to
“redirect” the solar energy, or to take it away from the storage
when the storage temperature reaches a pre-set level.
When the sensor reaches the start temperature, output A3
will be switched on. When the temperature level falls below
the start temperature hysteresis, the output A3 will be
switched off.
Fig. 35