RL SERIES INSTALLATION MANUAL
Optional FX10 Microprocessor Control
FX10 Control Overview
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 Freeze Detection) over a BAS as well as display them on a
medium user interface (MUI). HP, LP, CO and Freeze Detection
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 ECM2.3
variable blower speed settings can be changed over a BAS or
with a MUI. The control has an output programmed to enable
emergency heat in the event that the compressor is locked out.
This output 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 humidity sensor and displayed over the network and
if you are using an ECM2.3 blower 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.
The FX10 control has unused analog and digital inputs for field
installed items such as air temperature, water temperature, 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 Interface (MUI) for control setup and
advanced diagnostics is available with some mounting kits, MUIK1
- Panel mount version and the MUIK2-Wall mount version.
Standard Features
• Anti Short Cycle
• High Pressure Protection
• Low Pressure Protection
• Freeze Detection
• Loss Of Charge Detection
• Random Start
• Display for diagnostics
• Reset Lockout at disconnect or through BAS
• 2 Accessory outputs
• Optional DDC control add-on
DDC Operation and Connection
Other optional network protocol boards that can be added to the
FX10 are:
• Johnson Control N2
• BACnet
• LonWorks
Control and Safety Feature Details
Emergency Shutdown
The emergency shutdown mode can be activated by a command
from a facility management system or a closed contact on BI-2.
The default state for the emergency shutdown data point is off.
When the emergency shutdown mode is activated, all outputs will
be turned off immediately and will remain off until the emergency
shutdown mode is de-activated. The first time the compressor
starts after the emergency shutdown mode has been de-activated,
there will be a random start delay present.
Lockout Mode
Lockout mode can be activated by any of the following fault
signals: refrigerant system high pressure, refrigerant system low
pressure, heating freeze detection, and condensate overflow.
When any valid fault signal remains continuously active for the
length of its recognition delay, the controller will go into fault retry
mode, which will turn off the compressor. After the Compressor
short cycle delay, the compressor will attempt to operate once
again. If three consecutive faults occur in 60 minutes during a
single heating or cooling demand, the unit will go into lockout
mode, turning off the compressor, enabling the alarm output, and
setting the blower back to low speed operation until the controller
is reset. If the control faults due to the low pressure input (BI-3)
being open during the pre-compressor startup check, the control
will go into lockout mode immediately, disabling the compressor
from starting and enabling the alarm output (BO-6). The lockout
condition can be reset by powering down the controller, by a
command from the BAS, or by the holding the ESC and Return
keys on the MUI for 5 seconds.
Main FX 10 Board
To Next Page
Loading...
Need help?
General
