General Installation Information ............................................4
Accessories & Other Options ................................................5
Potable Water Systems .....................................................6-7
Open Loop Systems ..............................................................8
Earth Coupled Systems .........................................................9
Electrical .........................................................................10-11
Small EKW Setup/Operation ...............................................12
1. Application Overview .......................................................14
2. Inputs and Outputs Configuration ....................................14
3. Sequence of Operation ...................................................15
3.1. Power Fail Restart .................................................15
3.2. Random Start Delay ..............................................15
3.3. Compressor Fixed On Delay Time ........................15
3.4. Compressor Minimum On Delay ...........................15
3.5. Compressor Short Cycle Delay Time ....................15
3.6. Heating Cycle ..................................................15-16
3.7. Cooling Cycle ........................................................16
3.8. Emergency Shutdown ...........................................17
3.9. Lockout Mode ........................................................17
3.10. Entering Load Water Temperature (AI-1) ............18
3.11. Leaving Load Water Temperature (AI-2) .............18
3.12. Entering Source Water Temp (AI-3) ....................18
3.13. Source Low Water Coil Temperature Limit (AI-4) ..18
3.14. Load Low Water Coil Temperature Limit (AI-5) ...18
3.15. Leaving Source Water Temp (AI-6) .....................18
3.16. Compressor Proving (BI-1) .................................18
3.17. Emergency Shutdown (BI-2) ...............................18
3.18. Low Pressure Switch (BI-3) ................................18
3.19. Source Side Low Water Coil Temperature Limit Select (BI-4) ...................................19
3.20. Load Side Low Water Coil Temperature Limit Selection (BI-5) ....................................................19
3.22. Y1/System Enable Command (BI-7) ...................19
3.23. Source Flow Proving Switch (BI-8) .....................19
3.24. Aqua-stat O/Heating-Cooling Select Command (BI-9) ................................................19
3.27. Load Flow Proving Switch (BI-12) .......................20
4. Outputs ............................................................................20
4.1. Reversing Valve (BO-1) .........................................20
4.2. Compressor (BO-2) ...............................................20
4.3. Reversing Valve (BO-3) .........................................20
4.4. Secondary Unit Enable (BO-4) ..............................20
4.5. Secondary Unit S-Plan Comfort Select Enable (BO-5) ..............................................................20
4.6. Alarm Output (BO-6) .............................................20
4.7. Accessory Output 1/Source Pump Control (BO-7) ..............................................................21
4.8. Accessory Output 2/Load Pump Control (BO-8) ..............................................................21
Unit Startup .........................................................................22
ARI/ISO/BS EN Ratings ......................................................23
Capacity Data ................................................................24-39
Source Flow Rates (L/s) ......................................................40
Pressure Drop (kPa) ............................................................40
Troubleshooting ...................................................................41
Preventive Maintenance ......................................................42
