Hydromatic II Chiller Operation Manual
Table Of Contents
- Introduction
- Getting Started
- System Overview
- Operational Overview
- Initial Configuration
- System Menu Items
- Operation
- Fault Handling
- Wiring Diagrams
- Specifications
- Glossary
- Appendix 1: System menu overview
- Appendix 2: Organizing IDs in the CAN system
- Appendix 3: Ordering a system
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Rev 1.07 ©2015 Micro Air Corp 10/26/2015
Differential
The temperature change required to start the next stage. This parameter may be set for 1,
2, or 3 degrees Fahrenheit (.6, 1.1, or 1.7 °C)
Variable speed enable
(Future option)
EL. heat transition (Electric Heat Transition)
If the sea water temperature drops below the programmed value, the electric heater or
heaters if available will be used and all compressors turned off. This parameter may be
set for 40°F to 60°F (4.4°C to 15.6°C). When programmed for EHO (Electric Heat Only),
only electric heat will be used in heat mode. When programmed for OFF, only reverse
cycle heating will be used. The system will show a freeze fault if the sea water drops
below 40°F for 5 minutes if electric heaters are not available or E.L. heat transition is
programmed for off in heat mode.
Sea water pump operation
The sea water pump may be set to run continuously or cycled. If the parameter is set to
cycled, the master will wait 10 seconds after turning on the sea water pump to start any
compressor operation.
Low voltage shutdown
If the line voltage at the slave drops below the set voltage for more than five minutes, a
“Low AC Voltage” fault will be indicated on the display. Values can be set from 75 to
100 VAC and 175-200 VAC and can be set for “OFF”.
VFD fault monitor
A VFD normally closed dry contact fault relay can be connected to the MOD bus DX and
TX terminals. The VFD controller will open this relay when a fault occurs and the
display will show VFD Fault. Set this parameter to “YES” to enable this feature.
Use flow for freeze
The flow switch input may be used as a dry contact input from an external freeze sensor.
When the external freeze sensor opens its dry contact output, the control will stop the
compressor and show “Flow Switch Open” on the display. Set this parameter to “YES” to
enable this feature.
Pump Flow SW Enable
Pump flow switch enable causes the master control to react to an open flow switch on the
pump relay board. This action prevents the pump from running dry for extended periods
that can damage some pumps. If an open switch is detected, the pump and any operating
compressors will be shut down. The Pump Station Delay parameter sets the reaction time.