Envision Peripherals Water-Furnace IM1609 10 - Manual (Page 30)

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ENVISION CONSOLE INSTALLATION MANUAL
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 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.
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
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 0-5VDC humidity sensor that
is displayed over the network. If you are using an ECM
fan motor the control can enable dehumidification mode
based on a set point in the control. The dehumidification
set point itself can also be changed over a BAS or with a
MUI. Dehumidification mode can also be enabled by the
BAS. Because the FX10 is not factory configured to read
CO
2 levels, contact the factory for application assistance.
The FX10 control has unused analog and digital inputs for
field installed items such as air temperature, water tem-
perature, CO
2 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 MUIK2-Wall mount version.
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 add-on controls •
DDC Operation & Connection
Other optional network protocol boards that can be added
to the FX10 are:
Johnson Control N2 •
LonWorks •
BACnet •
Envision Console Controls