diff --git a/FHEM/98_WKRCD4.pm b/FHEM/98_WKRCD4.pm
index 7de0fa0..e38227d 100644
--- a/FHEM/98_WKRCD4.pm
+++ b/FHEM/98_WKRCD4.pm
@@ -19,14 +19,15 @@ use Time::HiRes qw(gettimeofday);
 # from the WP with the GET command
 my %WKRCD4_gets = (  
 	"Hzg-TempBasisSoll"	=> "Hzg-TempBasisSoll",
-	"WW-Temp-Soll"		=> "Temp-WW-Soll",
-	"Hzg-TempEinsatz"	=> "Hzg-TempEinsatz"
+	"Hzg-TempEinsatz"	=> "Hzg-TempEinsatz",
+        "Temp-WW-Soll"		=> "Temp-WW-Soll"
 );
 
 # list of Readings / values that can be written to the WP
 my %WKRCD4_sets = (  
 	"Hzg-TempBasisSoll"	=> "Hzg-TempBasisSoll",
-	"Hzg-TempEinsatz"	=> "Hzg-TempEinsatz"
+	"Hzg-TempEinsatz"	=> "Hzg-TempEinsatz",
+        "Temp-WW-Soll"		=> "Temp-WW-Soll"
 );
 
 # Definition of the values that can be read / written 
@@ -43,7 +44,7 @@ my %frameReadings = (
  'Temp-Ruecklauf-Soll'    => { addr => 0x0014, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
  'Temp-Ruecklauf'         => { addr => 0x0018, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
  'Temp-Vorlauf'           => { addr => 0x001C, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
- 'Temp-WW-Soll'           => { addr => 0x0020, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
+ 'Temp-WW-Soll'           => { addr => 0x0020, bytes => 0x0004, fmat => '%0.1f', unp => 'f<', min => 30.0, max => 55.0 },
  'Temp-WW'                => { addr => 0x0024, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
  'Temp-Raum'              => { addr => 0x0028, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },
  'Temp-WQuelle-Ein'       => { addr => 0x0030, bytes => 0x0004, fmat => '%0.1f', unp => 'f<' },