Specifications

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ENVISION COMMERCIAL SPECIFICATION CATALOG
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•
Freeze Detection•
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 unoccu-
pied cycle or power loss.
Emergency Shutdown
A field-applied dry contact can be used to place the con-
trol into emergency shutdown mode. During this mode, all
outputs on the board are disabled.
Freeze Detection
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 blower, 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 communica-
tion. 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.
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
Freeze Detection fault ........................................................30 seconds
Condensate overflow fault ...............................................30 seconds
Low pressure fault bypass ................................................... 2 minutes
Freeze sensing fault bypass ................................................ 2 minutes
Notes: Refer to Submittal Data SD1981, Application
Guide AGFX10, or BACnet Protocol Implementation
Conformance Statement for more information.
FX10 Controller (optional)
Main FX 10 Board