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 | |
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 com- municate 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 Sens- ing) 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.
can be changed over a BAS or with a MUI. The control has an input programmed to enable field installed emergency heat in the event that the compressor is locked out. This input can also be commanded on from a BAS as needed. An alarm history can be viewed through the MUI and will be held in memory until the unit is power cycled. Relative humidity can be read by a
The FX10 control has unused analog and digital inputs for field installed items such as air temperature, water tem- perature, CO2 or current status switches. The control has unused binary and PWM outputs that can be commanded over the BAS for field use. An optional Medium User Inter- face (MUI) for control setup and advanced diagnostics is available with some mounting kits, MUIK1 - Panel mount version and the
Zone Sensors
There are two options for zone sensors that can be used with the FX10 control. Both sensors use a Johnson con- trols A99 positive temperature coefficient type sensor.
The TAXXJ02 has a set point adjustment now which will give the end user a +/- 5°F adjustment from the set point as well as a push button that can be used for temporary occupancy. The control leaves the factory set to operate with a TAXXJ02 sensor and can be changed to read the TAXXA01 sensor through a building automation system or with a user interface.
Standard Features
•Anti Short Cycle
•High Pressure Protection
•Low Pressure Protection
•Water Coil Low Temperature (Freeze Sensing)
•Loss Of Charge Detection
•Random Start
•Display for diagnostics
•Reset Lockout at disconnect or through BAS
•2 Accessory outputs
•Optional BAS
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 harnesses for easy field change out of a bad control board. All ECM variable fan speed settings
DDC Operation & Connection
Other optional network protocol boards that can be added to the FX10 are:
•Johnson Control N2
•LonWorks
•BACnet
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