Unigas G258A Manual Of Installation - Use - Maintenance page 166

Microprocessor controlled gas burners
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ConF > Cntr
Parameter
CtYP
controller type
CACt
control action
SPL
least value of the
set-point range
SPH
maximum value of the
set-point range
oLLo
set-point limitation
start, operation limit
low
oLHi
set-point limitation
end, operation limit
high
(bold = factory settings)
ConF > rAFC
Activation boiler shock termic protetion:
RWF50.. can activate the thermal shock protection only on sites where the set-point is lower than 250°C and according
to rAL parameter.
Parameter
FnCT
function
rASL
ramp rate
toLP
tolerance band ramp
rAL
ramp limit
(bold = factory settings)
Value
1
2
1
0
-1999..0..+9999
-1999..100..+9999
-1999.... +9999
-1999.... +9999
Value
0
1
2
0,0 ... 999,9
0...9999
0...250
Description
1 = 3-position controller (open-stop-close only RWF50.2)
2 = continuative action controller (only RWF50.3)
1 = heating controller
0 = cooling controller
set-point limitation prevents entry of values outside the defined
range
set-point limitation prevents entry of values outside the defined
range
lower working range limit
upper working range limit
Description
Choose type of range degrees/time
0 = deactivated
1 = Kelvin degrees/minute
2 = Kelvin degrees/hour
Slope of thermal shock protection (only with functions 1 and 2)
width of tolerance band (in K) about the set-point
0 = tolerance band inactive
Ramp limit. When this value is lower than the temperature set-
point, the RWF controls the output increasing the temp set
point step by step according to rASL. If this is over the temp set
point, the control is performed in cooling.
6

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