Pereko KSM 17, Operation And Maintenance Manual

Page: 55 / 104

31
CT2S (Pt1000) – exhaust gas
Temp.
°C
Min.
Ω
Nom.
Ω
Max.
Ω
0 999,7 1000,0 1000,3
25 1096,9 1097,3 1097,7
50 1193,4 1194,0 1194,6
100 1384,2 1385,0 1385,8
125 1478,5 1479,4 1480,3
150 1572,0 1573,1 1574,2
11.9 Connection of boiler’s room
thermostat
Note: the boiler room thermostat
should be switched off if the whole
central heating system of the
building is supplied through a mixing
valve equipped with electric servo.
The regulator may work with mechanical or
electronic room thermostat, which opens the
contacts once the preset temperature has
been achieved.
Set-up the operation of room thermostat in:
MENU
→
Boiler Settings
→
Room
thermostat
→
Thermostat Selection
→
Universal
Once the preset room temperature
has been reached, thermostat opens
its contacts and the display shows:
Once the temperature in the room, in which
the room thermostat is installed, has reached
the preset value, regulator reduces the
preset boiler temperature by the value set in
Inc. p. b. temp. thermostat and the display
shows . This will cause longer breaks in
boiler operation (the boiler will remain in
SUPERVISION mode) and the same,
temperature in heated rooms will drop.
Moreover, the boiler pump (CH pump) may
be interlocked for a certain time by opening
the contacts of the room thermostat in
heated rooms. To activate this function -
enter:
MENU
→
Boiler Settings
→
Room
thermostat
→
CH pump standstill
and set the value of this parameter >0.
Setting the value of e.g. ,,5” causes the
pump will be stopped by the room
thermostat for 5 min. When ,,0” is set, the
CH pump will not be stopped by the room
thermostat. Once this time has elapsed, the
regulator switches on CH pump for a time set
in
CH pump op t. th. on e.g. 30s. This
feature prevents from excessive cooling of
the system caused by a pump stop.
The pump interlock by opening
the
contacts of the room
thermostat may be activated only
upon making sure the boiler will
not be overheated.
11.10 Connection of mixer’s room
thermostat
Room thermostat connected to the
operational unit affects mixer 1 circuit and/or
boiler circuit. If the whole heating circuit of
the building is supplied by a mixer with
electric servo, room thermostat for boiler
should be turned off.
Room thermostat, after disconnection of its
connectors reduces preset temperature of
the mixer circuit by a value set up in:
Reduce
preset mixer temperature to thermostat . This
parameter is available in:
MENU Mixer Settings no. 1,2,3,4,5
The mixer pump does not stop upon opening
contacts of the room thermostat unless other
settings have been made in the Service
Menu. Select the value of this parameter so
that once the room thermostat has
responded (its contacts have opened), the
temperature in the room drops. Other
settings - see sec. 7.14
11.11 Connection of reserve boiler
The regulator can control a reserve boiler
(gas- or oil-fired), eliminating the necessity
of enabling or disabling this boiler manually.
The reserve boiler will be enabled if the
temperature of the pellet boiler drops, and
disabled when the pellet boiler reaches an
appropriate temperature. Connection to a
reserve boiler, e.g. oil-fired one, should only
be made by a qualified fitter, in accordance
with the technical documentation of this
boiler.