81
Remote Switch Config (Configuration
UNIT
RM.CF)
This is the configuration that allows the user to assign different
types of functionality to the remote discrete input.
• 0 — NO REMOTE SW — The remote switch will not be
used.
• 1 — OCC-UNOCC SW — The remote switch input will
control the occupancy state. When the remote switch input
is ON, the unit will forced into the occupied mode. When
the remote switch is OFF, the unit will be forced into the
unoccupied mode.
• 2 — STRT/STOP — The remote switch input will start
and stop the unit. When the unit is commanded to stop, any
timeguards in place on compressors will be honored first.
When the remote switch is ON, the unit will be command-
ed to stop. When the remote switch is OFF the unit will be
enabled to operate.
• 3 — OVERRIDE SW — The remote switch can be used to
override any internal or external time schedule being used
by the control and force the unit into an occupied mode
when the remote input state is ON. When the remote
switch is ON, the unit will be forced into an occupied state.
When the remote switch is OFF, the unit will use its inter-
nal or external time schedules.
Remote Switch Logic Configuration (Configuration
SW.LG
RMI.L)
The control allows for the configuration of a normally open/closed
status of the remote input switch via RMI.L. If this variable is con-
figured OPEN, then when the switch is open, the remote input
switch perceives the logic state as OFF. Correspondingly, if
RMI.L is set to CLOSED, the remote input switch will perceive a
closed switch as meaning OFF. See Tables 75 and 76.
Hot Gas Bypass
Hot gas bypass is an active part of the A Series ComfortLink
capacity staging and minimum evaporator load protection
functions. It is controlled though the Minimum Load Valve
function.
The hot gas bypass option consists of a solenoid valve with a
fixed orifice sized to provide a nominal 3-ton evaporator load
bypass. A hot gas refrigerant line routes the bypassed hot gas
from Circuit A’s discharge line to Circuit A’s evaporator dis-
tributor. When the unit control calls for hot gas bypass, the hot
gas enters the evaporator coil and adds refrigeration load to the
compressor circuit to reduce the cooling effect from Circuit A.
The hot gas bypass system is a factory-installed option in-
stalled on Circuit A only. This function is enabled at Configu-
ration
COOL
MLV. When this function is enabled, an
additional stage of cooling capacity is provided by the unit
control staging sequences (see Tables 38, 39, 43, and 45).
Space Temperature Offset
Space temperature offset corresponds to a T56 sensor slider that
allows the occupant to adjust the space temperature by a config-
ured range during an occupied period. This sensor is only applica-
ble to units that are configured as either 2-Stage SPT or Multi-
Stage SPT control (Configuration
UNIT
C.TYP = 5 or 6).
Space Temperature Offset Sensor (Configuration
UNIT
SENS
SP.O.S)
This configuration disables the reading of the offset slider.
Space Temperature Offset Range (Configuration
UNIT
SENS
SP.O.R)
This configuration establishes the range, in degrees F, that the
T56 slider can affect SPTO when adjusting the slider from the
far left (-SP.O.R) to the far right (+SP.O.R). The default is 5°F.
Space Temperature Offset Value (Temperatures
AIR.T
SPTO)
The Space Temperature Offset Value is the reading of the slider
potentiometer in the T56 that is resolved to delta degrees based
on SP.O.R.
Table 74 — Display Configuration
Table 75 — Remote Switch Configuration
Table 76 — Remote Switch Logic Configuration
ITEM EXPANSION RANGE UNITS
CCN
POINT
SP.O.S Space Temp Offset Sensor Enable/
Disable
SPTOSENS
SP.O.R Space Temp Offset Range 1 to 10 SPTO_RNG
SPTO Space Temperature Offset +- SP.O.R ^F SPTO
ITEM EXPANSION RANGE UNITS POINT DEFAULT
TEST Test Display LEDs ON/OFF TEST Off
METR Metric Display ON/OFF DISPUNIT Off
LANG Language Selection 0 to 1(multi-text strings) LANGUAGE 0
PAS.E Password Enable ENABLE/DISABLE PASS_EBL Enable
PASS Service Password 0000 to 9999 PASSWORD 1111
ITEM EXPANSION RANGE CCN POINT
REMT Remote Input State ON/OFF RMTIN
RM.CF Remote Switch Config 0 to 3 RMTINCFG
RMI.L RemSw Off-Unoc-Strt-NoOv Open/Close RMTINLOG
REMOTE
SWITCH LOGIC
CONFIGURATION
(RMI.L)
SWITCH
STATUS
REMOTE INPUT STATE
(REMT)
REMOTE SWITCH CONFIGURATION (RM.CF)
0123
No Remote Switch Occ-Unocc Switch Start/Stop Override
OPEN
OPEN OFF xxxxx Unoccupied Start No Override
CLOSED ON xxxxx Occupied Stop Override
CLOSED
OPEN ON xxxxx Occupied Stop Override
CLOSED OFF xxxxx Unoccupied Start No Override
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