Salus PCSol 150 - Setting of Deltas 4÷14; Critical Temperature Alarm al; 7 Controller Operating Algorithm; Fig. 6.1 Controller Option Setting;Checking

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a) b)
Fig. 6.1 Controller option setting/checking
a) option preset checking
b) option preset setting
Settings of each controller option are
described below.
6.1. Setting of deltas 4÷14
The controller allows to set
temperature difference dT=T1-T2 that
will start the collector pump.
Possible setting values are: 4, 6,
8, 10, 12, 14K.
6.2. Critical temperature alarm
AL
Critical temperature is such collector
temperature (T1 sensor) that despite
collector pump stopping, after reaching reservoir
temperature preset, will start collector pump in
order to discharge excessive heat from the
collector.
The controller allows you to turn on or off
loud alarm for the collector critical temperature. If
AL option is off, the controller will not sound
audible alarm when the critical temperature is
reached, but it will take alarm action (discharge
heat from the collector into the reservoir).
6.3. Maximal DHW temperature -
Max85÷95
The controller allows you to set
maximal temperature for the reservoir.
It is T2 temperature above which the
controller will start the reservoir overheating
alarm and it will stop heat loading to the
reservoir.
This alarm has the highest priority and it will
always stop the collector pump operation. It
means that even in case of critical collector
temperature, the reservoir overheating alarm will
disable the collector pump from further operation.
It possible to set three values for the
reservoir maximal temperature option: 85, 90,
95°C
7. CONTROLLER OPERATING
ALGORITHM
When switched on the controller
automatically starts to control the collector pump
operation.
When the T1 sensor temperature reaches
minimal collector operation value (TCOLmin), the
controller will enable the collector pump
operation. Such status is indicated by illumination
of the sun symbol indicator. When the collector
temperature drops two degrees below minimal
temperature preset, the sun symbol will go off
and the controller will disable the collector pump,
if the last was working.
The collector minimal temperature
TDHWmin is set by selecting edition at the
sun symbol indicator
If the temperature difference between the
collector and reservoir (T1-T2) exceeds value set
in options as d4÷14 and the minimal collector
temperature is reached (sun indicator is lit), the
controller will start the collector pump and it will
be loading heat into the reservoir (sun indicator is
lit) until the temperature difference T1-T2<dT-2
(current dT is lower than preset by two degrees)
or the collector temperature (T1 sensor) drops
below minimal collector temperature (TCOLmin-
2). Then, the collector pump will be turned off.
The controller turns the collector pump off
and on in cycles, depending on sunlight intensity
and reservoir conditions, by the time when the
DHW reservoir preset temperature (TsDHW) is
reached.
The reservoir preset temperature TsDHW
is set by selecting edition at the T2
indicator
When the DHW reservoir preset
temperature is reached, the controller will stop
the collector pump, until the reservoir
temperature (T2 sensor) is lower than the preset
by one degree (T2<TsDHW-1). Then, the
controller will restart the collector pump, if
current conditions allow the reservoir loading.
When the collector pump is stopped,
because the reservoir preset temperature has
been reached, the controller will monitor the
collector temperature (T1 sensor) and if it
exceeds preset value TCOLcr, the controller will
start the collector pump to discharge the
collector’s critical temperature. When the collector
temperature drops in relation to TCOLcr preset by
2°C, the controller will stop to force its operation.
The collector critical temperature TCOLcr
is set by selecting edition at the T1
indicator