GH10HA USER MANUAL
PAGE
9
Issue I
APRIL 2013
6.2.3.
CH Pump
Regardless of the configuration of additional pump 'F0', the CH pump:
−
is activated when the temperature of water leaving the boiler exceeds 85°C, and remains in operation
regardless of other conditions (such as thermostat/room panel lock or DHW priority) until the outlet water
temperature falls below 84 ° C;
−
is turned off when the boiler extinguished algorithm is implemented following a fall in temperature of 10 ° C
, of water leaving the boiler after the fall of boiler outlet water temperature of 10 ° C – see the description of
boiler extinguished detection for details;
−
When the anti-legionella function of the CH pump is operating, according to the algorithm contained in the
description of anti-legionella function.
Automatic mode:
When
'F0'
= 0 ÷ 2
The CH pump is switched on when the temperature of water leaving the boiler is greater than or equal to
the value set in parameter F6, and is disconnected when the temperature falls below F6- 3°C. When the room
thermostat is locked, the CH pump disconnects four minutes after the lock is activated. When the room
thermostat is locked, if the value of parameter F13 is greater than 0, the pump is connected periodically for 30
seconds according to
'F13'
minute.
When 'S0'
= 3
The CH pump operates as for
'F0'
= 0 ÷ 2, also when it is necessary to heat DHW. (when the water
temperature in the boiler is less than or equal to the set hot water temperature.
'Tz
cwu
'
, and in the case of the
anti-legionella function when the temperature is less than or equal to 75°C). The CH pump operates as for
room panel/thermostat lock, connecting periodically in accordance with parameter
'F13'
.
When 'S0'
= 4
The CH pump does not operate
DHW Pump/ Mixer Pump
In automatic and sustain mode, the DHW and mixer pump operate according to the selected configuration:
When 'S0'
= 0 – no pump
The output is used for indicating an alarm (permanently switched on when the controller is in ALARM
state).
When 'S0'
= 1 – Mixer pump
The mixer pump turns off when the returning water temperature reaches the value set in parameter 'TsDHW'
and is activated when the return water temperature falls below 'TsDHW' - 3°C.
When ‘SO’-1 – DHW pump
-
The DHW pump is connected when (1) the water temperature in the boiler is lower than the preset
temperature in parameter 'TsDHW' and (2) the outgoing water temperature is higher than the
temperature of the water in the 1°C, and (3) the outgoing water temperature is higher than
40°C.
-
The DHW pump is turned off when (1) the water temperature in the boiler is above the point set in
parameter 'TsDHW' (during operation of anti-Legionella function - when the boiler water temperature
is higher than 75°C), or (2) the outgoing water temperature is lower than or equal to the water
temperature in the boiler, or (3) the outgoing water temperature is below 40°C. When the anti-
legionella function is operating, the DHW pump works according to the algorithm contained in the
description of the anti-legionella function.
Содержание GH10HA
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