Raypak B0507 Owner's Manual And Installation Instructions page 49

AMBIENT AIR COMPENSATOR
The RWF55 electronic thermostat can be configured to use weather-compensated set point
shifting.
When weather-compensated set point shifting is selected the set point is automatically adjusted
according to the outdoor temperature; this function assists in reducing temperature fluctuations
in the building due to additional heat being gained or lost due to the weather. Each Raypak
must have its own outside sensor (no parallel connection).
An LG-Ni1000 or PT1000 outdoor sensor (not supplied) must be connected across terminals
31 & 32 of the RWF55 and the following parameters must be correctly set.
Parameters for Optional Ambient Air Compensator – RWF55 Electronic Thermostat
The following parameters enable the weather-compensated set point shifting function of the RWF55 electronic
thermostat.
To access and adjust the Configuration (ConF) Level Parameters refer to
Parameters" on page 48.
Level
Sensor Type
Function
InP InP3
Correction of measured value
Filter Time Constant
1
The filter time constant is used to adapt the digital 2
26% of the change is captured after a time corresponding to the filter time constant dF3 (2 x dF3: approx 59% is captured; 5 x dF3 approx 96%
is captured.
The following parameters
temperature for a particular outdoor temperature and also
set the heating curve slope.
Prior to altering the settings advice should be sought from
the heating system designer to determine the optimum
values suitable for the application.
NOTE: Incorrect setting may cause unacceptable
temperature fluctuations in the heating system.
To access and adjust the Parameter (PArA) Level Parameters refer to
Level Parameters" on page
NOTE: The parameters below cannot be accessed until the Parameter FnC3 has been set, refer to page 49.
Parameter Display
Outside
temperature At1
Curve point 1
Heater
temperature Ht1
Curve point 1
Outside
temperature At2
Curve point 2
Heater
temperature Ht2
Curve point 2
RWF55 Configuration (ConF) Level Parameters
Parameter
1
nd
order input filter (time in s; 0 s = filter off). If the input signal changes abruptly, approx
determine the
48.
RWF55 Parameter (PArA) Level Parameters
Range
-40....120
Sets the target heater temperature for an outdoor
temperature and determines point 1 of the heating curve
SPL....SPH
-40....120
Sets the target heater temperature for an outdoor
temperature and determines point 2 of the heating curve
SPL....SPH
Display Value Range
Sen3 0....3
0....1
FnC3
OFF3 -1999....+9999
0.0....1500.0
dF3
target
Function
Refer to heating curve slope diagram above
Refer to heating curve slope diagram above
49
TEMPERATURE CONTROL
"Adjusting Configuration Level
Raypak Setting
1 - Pt1000 / 2 - LG-Ni1000
1 - weather compensated set point
0 – No offset
1278 seconds
Heating Curve Slope
"Checking or Adjusting Parameter (PArA)
Default
Setting
-10
60
20
50