14
CH APPLICATION SELECTION
(PARAMETER 3)
The boiler response to a heating call can be changed
with Parameter 3. Parameter 3 provides 4 different
modes of central heating operation.
CH Application Selection Options
(Parameter 3)
CH Call Disabled
(Parameter 3 = 00)
The boiler will not respond to a heating call. Both the
burner and CH circulator will remain off during a heating
call. The boiler freeze protection feature will always be
active even if CH call is disabled. The boiler will contin-
ue to respond to a domestic call from an Indirect Water
Heater.
CH Call Enabled – Factory Setting
(Parameter 3 = 01)
The boiler will respond to a heating call. Both the burn-
er and CH circulator will operate during a heating call. A
domestic call has priority over a heating system call for
heat. The boiler setpoint will be set to the CH setpoint
and the CH circulator will run. The DHW circulator will be
off.
Burner Disabled, CH Pump Continuous
(Parameter 3 = 02)
The burner will not respond to a heating call. The CH cir-
culator will run continuously, even during a domestic call.
The boiler freeze protection feature will always be active
even if the burner is disabled. The boiler will continue to
respond to a domestic call from an Indirect Water
Heater.
Burner Enabled, CH Pump Continuous
(Parameter 3 = 03)
The burner will respond to a heating call. The burner will
operate during a heating call. The CH circulator will run
continuously, but will be disabled during a domestic call.
A domestic call has priority over a heating system call for
heat. The boiler setpoint will be set to the CH setpoint.
The DHW circulator will be off.
Parameter 3 Adjustment
To change Parameter 3, press the MODE button until the
display shows
PARA
. Press the STEP button to reach
Parameter 3. Press the “+” or “–“ button to change the
setting of Parameter 3 to the desired setting. Press the
STORE button and confirm that the display blinks to indi-
cate the setting has been stored.
A shortcut can also change Parameter 3 and disable a
heating call. Press and hold the “+“ key for approxi-
mately 2 seconds while in STBY mode. Releasing the
“+“ key when
C0ff
is shown on the display will disable
the CH function of the boiler. To enable the CH function,
press and hold the “+“ key while in STBY mode and
release when the display shows
3
XXX
where
XXX
rep-
resents the CH setpoint.
This method of using the “+“ button to disable a
heating call will not disable the CH circulator if it has
already been placed in continuous operation. To
change both burner and circulator operation,
Parameter 3 must be changed in the PARA mode.
NOTICE
Содержание Prestige Supplement - Type 5 MCBA
Страница 6: ...4 DOMESTIC HOT WATER DHW PARAMETERS...
Страница 14: ...12 CENTRAL HEATING CH PARAMETERS...
Страница 27: ...25 PARAMETER WORKSHEET...