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CC1B7865E
February 10, 2000
Landis & Staefa Division
1. Introduction
Please read this User Manual before starting up the controller. Keep the Manual in a
place that is accessible to all users at all times. Please help us improve the Manual.
Your suggestions will be welcome.
All necessary settings and, where required, settings inside the unit are described in this
User Manual, for controller software version 126.01.01.
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Section 6.2.5 «Display software version and dimensional unit»
Should any difficulties arise during commissioning, you are asked not to carry out any
unauthorized manipulations on the unit. You could endanger your rights under the unit
warranty! Please contact us in such a case.
When returning modules, assemblies or components to Landis & Staefa, the regulations
of DIN EN 100 015 «Protection of electrostatically sensitive devices» must be observed.
Use only the appropriate
ESD
packaging for transport.
Please note that we cannot accept any liability for damage caused by ESD.
ESD = electrostatic discharge
The RWF40... is used primarily for controlling temperature or pressure in oil- or gas-fired
heating plants. It is a compact 3-position controller without position feedback that acts
on the burner. An external switch can be used to change it over to a 2-position controller
for the control of two-stage burners. The built-in thermostat function switches the burner
on and off. An adjustable response threshold is used to switch to a higher burner output
(high-fire operation).
A shift controller controls the temperature or pressure. Minimum and maximum limits for
the setpoint can be set. A self-setting function is available as a standard feature.
The plug-in controller module measures 96 x 48 x 127.5 mm and is especially suited for
mounting in control panels. The controller incorporates two 4-digit 7-segment displays
for the actual value (red) and setpoint (green). A limit comparator is also provided and
its switching behavior can be set on the configuration level.
A selection can be made between eight different limit comparator functions.
An RS-485 interface is used for integration into a data network. Output 5 can be used as
a modulating output for modulating or 2-stage operation.
All connections are made via screw terminals at the rear of the unit.
1.1 General notes
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1.2 Description
Use
Control
Options
