Potterton Paramount four Installation Manual page 96

9 Settings
Fig.29 Switching difference
Ti
Sd1
Sd2
Sd3
96 Paramount four 30 – 115 kW
Sd
Ti
RA-0000079
t
Prog.no. 2444: With this parameter the maximum boiler capacity for the
DHW mode can be restricted.
Note
These are calculated values. The actual output must be calculated
using a gas meter, for example.
Controller delay (2450)
The controller delay is used for a stabilisation of the combustion condi­
tions, especially after a cold start. After release of the firing automation by
the controller this remains on the set output for a specified time. Modula­
tion is only released after this time has elapsed.
Prog. no. 2450 is used to set the operating mode at which the controller
delay is active.
Controller delay fan output (2452)
Boiler capacity which is used during the duration of the control delay.
Controller delay duration (2453)
Duration of the control delay. The time duration starts as soon as a posi­
tive flame is detected after ignition.
Switching diff on CHs (2454), Switching diff off min CHs
(2455), Switching diff off max CHs (2456), (2460), Switching diff on
HW (2461) and Switching diff off min HW (2462)Switching diff off
max HW
Sd Switching difference off
Sd1 Switching diff off max CHs, Switching diff off max HW
Sd2 Switching diff off min CHs, Switching diff off min HW
Sd3 Switching diff on CHs, Switching diff on HW
t Time
Ti Actual temperature
To avoid unnecessary switch off during transient effects the switch-off dif­
ference adapts dynamically depending on the temperature profile (see
fig.).
Delay heat req special op (2470)
The heat request during special operation (chimney-sweep function, con­
troller stop, manual operation) is sent to the burner delayed by the time set
here. In this way slowly opening mixers can already start up before the
burner goes into operation. Thus a boiler temperature that is too high can
be prevented.
Pressure switch shutdown (2500)
This function checks the static water pressure with the aid of the connec­
ted water pressure switch. Depending on the option set (
Lockout position ) a start prevention or lockout position is carried out
or
with a corresponding diagnosis.
A closed water pressure switch releases the startup of the burner control
and the actuation of the pumps. A start prevention or lockout position is
triggered with the pressure switch open.
The pump actuation is also locked for protection against dry running. If the
water pressure increases again and the switch closes again, this is auto­
matically cancelled again with a start prevention and the pump actuation is
released again.
Gas energy metering (2550)
This parameter is used to switch gas energy metering on or off. The coun­
ter values are not deleted during this process.
Start prevention
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