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ratings - - no dehumidification airflow reduction. This is
nominally 350 CFM/ton, but will vary if a 2- -stage outdoor unit
is used.
S MAXIMUM - - 400 CFM/ton. Dehumidify features are not active
when set to maximum.
S QUIET- - minimum cooling airflow that the system can safely
run (typically 300 CFM/ton). Use this setting if duct noise is a
severe problem. Note that duct sweating in high humidity
environments could be an issue.
Dehum Airflow:
S NORMAL (factory default) - - When equipment is running to
dehumidify, the airflow is allowed to adjust to a minimum to
satisfy the dehumidification call.
S HIGH - - Minimum airflow during the dehumidify mode is
increased to reduce duct and register sweating. Also increases
minimum airflow during normal cooling operation to reduce
duct sweating.
Heater Size:
S (choices dependent upon fan coil model)
This will show the heater size entered during the start- -up process.
This value can be changed to another value (limited by the model
number of the fan coil). If the electric heater is self- -identifying, this
value is not shown.
Elect Heat Lockout
S NONE (default)
S +5 to 55_F (- -15 to 18_C)
Outside temperature above which the electric heat will not operate
except for defrost.
G Terminal
This setup option selects desired operation when the R- -G circuit is
made on the fan coil control board.
S DISABLED (Default)
S FAN - - turns on fan to selected fan speed when G terminal is
energized. See Fig. 25.
This setting is used in conjunction with fresh air supply products
(e.g. fresh air/make- -up air dampers).
S FAN SPEED - - select Low, Med, High for all zones when G
terminal is energized.
S SHUTDOWN - - shuts off fan and equipment when initiated.
This function is not intended for emergency fire shutdown. It
may be activated by a dry contact from an external device such
as a float switch or a relay. User selects whether the contact is
NC - - normally closed (default) or NO- - normally open. User
Interface displays SYSTEM MALFUNCTION on screen and
registers G terminal shutdown event in Last 10 System Events.
See Fig. 26.
Dehum Drain
Turns off the continuous fan at the end of cooling for five minutes,
in order to drain the indoor coil of water. The fan will only be
turned off if a dehumidify demand existed at the start of or during
the cooling cycle. Default is enabled.
Reheat Dehum
Enables electric heat to be used while Cool to Dehumidify is
running. This will allow the Cool to Dehumidify function to run
much longer, greatly improving humidity control in cooling mode.
Accumulated
electrical
energy
kilowatt- -hours) is shown on the Fan Coil Run Hours screen and
can be reset there. This is only available with fan coil systems.
used
while
reheating
(in
Setup - - Heat Pump / AC
Cooling Lockout:
S NONE (default)
S 45_F (7_C)
S 50_F (10_C)
S 55_F (13_C)
Outside temperature below which cooling will not be provided.
Low Ambient Cooling:
S NO (default)
S YES
Selecting YES will enable the low ambient cooling operation in
the outdoor unit. This setting is only available with communicating
outdoor units and with Cooling Lockout set to NONE. Low
ambient kits are not needed with communicating outdoor units.
For detailed sequence of operation, see outdoor unit installation
instruction.
Entered Size:
S (dependent on indoor unit model)
Size of the outdoor unit entered during the start- -up process. If the
outdoor unit is a communicating model, this value will not be
shown. This size can be changed here but is limited to sizes that the
indoor unit can handle.
Defrost Interval:
S 30 minutes
S 60 minutes
S 90 minutes
S 120 minutes (default)
S Auto- -Defrost interval optimized by outdoor control (default for
communicating HP)
Time interval at which defrost cycles can occur on a heat pump.
Lockout Temp:
S Off (default)
S +5 to 55_F (- -15 to 18_C)
Locks out the heat pump from operating below the selected outside
temperature. Appears with a fan coil only. Must be below any
electric lockout temperature in Fan Coil Setup.
Quiet Shift
S Off (default)
Turns on
Quiet Shift function
communicating heat pumps.
High Cool Latch:
S OFF (default)
S ON (high cool stage on at all times, unzoned only)
S 80 to 110_F (27 to 43_C) (unzoned only)
S DISABLE (disable use of high cool stage)
Outside temperature above which only the high speed (of a 2- -stage
outdoor unit) will run when cooling. High Cool Latch setting of
On will not function in zoned systems.
High Heat Latch
S OFF (default)
S ON (high heat stage on at all times, unzoned only)
S 20 to 50_F (- -7 to 10_C)
2- -stage heat pump runs only high stage heating below a
selectable outdoor temperature. Selections from 20 to 50_F ( - -7
to 10_C) are available in 5_ increments. High Heat Latch setting
of On will not function in zoned systems.
S DISABLE (disable use of high heat stage)
11
in 1- -stage or 2- -stage
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