EWWQ090G ÷ EWWQ720L - R410a - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410a - Condenser less
EWHQ100G ÷ EWHQ400G - R410a - Heat pump scroll chillers
EWAQ- - R410a - Air-cooled scroll chillers
EWAQ-G - R410a - Air-cooled scroll chillers
EWYQ- - R410a - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00106-15EN
Table of Contents
1 SAFETY CONSIDERATIONS .................................................................................................. 5
1.1 General ............................................................................................................................. 5
1.2 Avoid electrocution ........................................................................................................... 5
1.3 Safety Devices .................................................................................................................. 6
1.3.1 General safety devices .............................................................................................. 6
1.3.2 Circuit safety devices ................................................................................................. 6
1.3.3 Component safety devices ......................................................................................... 6
1.4 Available sensors .............................................................................................................. 8
1.4.1 Pressure transducers ................................................................................................. 8
1.4.2 Temperature sensors ................................................................................................. 8
1.4.3 Thermistors ................................................................................................................ 8
1.5 Available Controls ............................................................................................................. 8
1.5.1 Evaporator - Condenser pumps ................................................................................. 8
1.5.2 Compressors ............................................................................................................. 8
1.5.3 Expansion Valve ........................................................................................................ 8
1.5.4 Four Way Valve ......................................................................................................... 8
1.6 Abbreviations used ........................................................................................................... 9
1.7 Customer Terminal Block Connections ............................................................................. 9
1.7.1 Connections description and purpouse ...................................................................... 9
2 GENERAL DESCRIPTION .................................................................................................... 12
2.1 Overview ......................................................................................................................... 12
2.2 Controller Operating Limits ............................................................................................. 12
2.3 Controller Architecture .................................................................................................... 12
2.4 Communication Modules ................................................................................................ 13
3 Using the Controller ............................................................................................................... 14
3.1 General Recommendation .............................................................................................. 15
3.2 Browsing ......................................................................................................................... 15
3.3 Passwords ...................................................................................................................... 16
3.4 Editing ............................................................................................................................ 16
3.5 Basic Control System Diagnostic .................................................................................... 17
3.6 Controller maintenance ................................................................................................... 19
