27
Parameter
L
not applicable
6.6.12 HTG cut in temp (
N
)
Adjustable
1)
(-10) to
20
°C, factory default
03
.
This value sets the
Δ
t below actual return temp at the moment of control stop during
HTG demand.
A control stop occurs when the flow temp equals the flow temp set point + 5°C.
HTG cut in temperature = actual return temperature at the moment of control stop (e.g.
60) - parameter
N
(3)
ie 60 - 3 = 57°C
If this takes longer than the maximum delay time (parameter
U
), the boiler will restart
(unless flow temperature exceeds flow temperature setpoint).
Parameter
O
not applicable
6.6.13 Boiler type (
P
)
Factory default
74
must not be changed.
Parameter
T
factory set must not be changed.
6.6.14 Maximum delay time (
U
)
Adjustable from
00
-
99
minutes, factory default 15 minutes (
15
).
This value sets the maximum off time following a control stop. The minimum off time is
preset to a fixed value (150 sec.).
A combination of both values is used to prevent hunting taking place.
6.6.15 Start and end point analog signal (
Q
and
Y
)
Start point (0 Volt): adjustable between
5)
(-50)°C and +
50
°C, factory default
00
°C.
This value sets the required flow temp at 0 Volt signal input (restricted by the min flow
set point).
End point (10 Volt): adjustable b
51
°C and
((
(+299)°C, factory default
)0
(100)°C.
This value sets the required flow temp at 10 Volt signal input (restricted by the max
flow set point).
NOTE:
These settings are only applicable when boiler control operation parameter
(
A
) has the
x
value set to
4
.
57117.indd 27
57117.indd 27
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1-4-2009 14:35:51
