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Hersteller: Envision Peripherals Dateigröße: 2.69 mb Dateiname: Unterrichtssprache:

The most unique feature is integrating the FX10 into the Envision series as both the heat pump and DDC controller providing both a cost advantage and providing features not typically found on WLHP controls. This integration allows heat pump monitoring sensors, status and service diagnosis faults to be communicated thru the DDC direct to the building automation system (BAS), giving building supervisors detailed and accurate information on every piece of equipment without removing an access panel. FX10 Advanced Control Overview The Johnson Controls FX10 board is specifically designed for commercial heat pumps and provides control of the entire unit as well as input ports for Open N2, LonTalk, BACnet (MS/TP @ 19,200 Baud rate) communication protocols as well as an input port for a user interface. The user interface is an accessory item that can be used to aid in diagnostics and unit setup. A 16-pin low voltage terminal board provides terminals for common field connections. The FX10 Control provides: • Operational sequencing • High and low-pressure switch monitoring • General lockout • Water Coil Low Temperature (Freeze Sensing) • Condensate overflow sensing • Lockout mode control • Emergency shutdown mode • Random start and short cycle protection Short Cycle Protection Allows a minimum compressor “off” time of four minutes and a minimum “on” time of two minutes. Random Start A delay of 1 to 120 seconds is generated after each power- up to prevent simultaneous startup of all units within a building after the release from an unoccupied cycle or power loss. Emergency Shutdown A field-applied dry contact can be used to place the control into emergency shutdown mode. During this mode, all outputs on the board are disabled. Water Coil Low Temperature (Freeze Sensing) Limit Field selectable for 15° or 30°F (-9° or -1°C) Installation Options • Standalone controlled by standard room thermostat • Standalone with a Zone Temperature Sensor (must have user interface to change set points beyond the allowed +/- 5°F) • Integrated into BAS by adding communication module Accessory Outputs Quantity 2. One cycled with fan, other with compressor. User Interface 4 x 20 backlit LCD. Optional Plug-in Communication Modules ( compatible with standard BAS protocols) • Open N2 • LonTalk • BACnet (MS/TP @ 19,200 Baud rate) Display Requires DLI Card/Kit. Up to 2 displays, either 1 local and 1 remote, or 2 remote. (A 2-display configuration requires identical displays.) Local display can be up to 3 meters from the controller, power supply, and data communication. Remote display can be up to 300 meters from the controller. Remote display must be independently powered with data communication done via 3 pole shielded cable. 28 ENVISION CONSOLE INSTALLATION MANUAL Envision Console Controls Control Timing & Fault Recognition Delays Lead compressor “ON” delay..........................................90 seconds (not applicable for single compressor models) Minimum compressor “ON” time ...................................... 2 minutes (except for fault condition) Short cycle delay..................................................................... 5 minutes Random start delay.......................................................0-120 seconds High pressure fault .................................................................<1 second Low pressure fault ...............................................................30 seconds Water coil low temperature (freeze sensing) fault .......30 seconds Condensate overflow fault ...............................................30 seconds Low pressure fault bypass...................................................2 minutes Water coil low temperature (freeze sensing) fault bypass .......................................................................... 2 minutes Notes: Refer to Submittal Data SD1981, Application Guide AGFX10, or BACnet Protocol Implementation Conformance Statement for more information. Optional FX10 Microprocessor and BAS Interface The FX10 is a microprocessor based control that not only monitors and controls the heat pump but also can communicate any of this information back to the building automation system (BAS). This means that not only does the control monitor the heat pump at the unit you can also monitor and control many the features over the BAS. This clearly puts the FX10 in a class of its own. The control will enumerate all fault conditions (HP, LP, CO, LOC, and Water Coil Low Temp (Freeze Sensing)) over a BAS as well as display them on a medium user interface (MUI). HP, LP, CO and Water Coil Low Temp (Freeze Sensing) faults can all be reset over a BAS. A Loss Of Charge fault can not be reset or bypassed until the problem has been corrected. A MUI is invaluable as a service tool for the building service team. The unit can be commanded to run by a typical heat pump thermostat or run based on heating and cooling set points supplied by a BAS. The control board is wired with quick connect...

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