Hot Gas Bypass; Space Temperature Offset; Time Clock Configuration - Carrier WEATHERMAKER 48/50AJ Operation And Service Manual

ITEM
SW.LG SWITCH LOGIC: NO / NC
FTS.L Filter Status Inpt-Clean
IGC.L IGC Feedback - Off
RMI.L RemSw Off-Unoc-Strt-NoOv
ECS.L Economizer Switch - No
SFS.L Fan Status Sw. - Off
DL1.L Dmd.Lmt.Sw.1 - Off
DL2.L Dmd.Lmt.2 Dehumid - Off
IAQ.L IAQ Disc.Input - Low
FSD.L Fire Shutdown - Off
PRS.L Pressurization Sw. - Off
EVC.L Evacuation Sw. - Off
PRG.L Smoke Purge Sw. - Off
ITEM
TEST Test Display LEDs
METR Metric Display
LANG Language Selection
PAS.E Password Enable
PASS Service Password
Table 91 — Remote Switch Configuration
ITEM EXPANSION
REMT Remote Input State
RM.CF Remote Switch Config 0 - 3
RMI.L RemSw
Off-Unoc-Strt-NoOv
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 configured 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 re-
mote input switch will perceive a closed switch as meaning
OFF. See Table 92.
Hot gas bypass is an active part of
Hot Gas Bypass —
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
distributor. 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
installed on Circuit A only. This function is enabled at Config-
 
uration COOL MLV. When this function is enabled, an
additional stage of cooling capacity is provided by the unit
control staging sequences (see Tables 52, 54, 58, and 60).
Space Temperature Offset —
set corresponds to a slider on a T56 sensor that allows the occu-
pant to adjust the space temperature by a configured range
during an occupied period. This sensor is only applicable to
units that are configured as either 2-Stage SPT or Multi-Stage

SPT control (Configuration
ITEM EXPANSION
SP.O.S Space Temp
Offset Sensor
SP.O.R Space Temp
Offset Range
SPTO Space Temperature
Offset
Table 89 — Switch Logic Configuration
EXPANSION
Table 90 — Display Configuration
EXPANSION
ON/OFF
ON/OFF
0-1(multi-text strings)
ENABLE/DISABLE
0000-9999
CCN
RANGE
POINT
ON/OFF RMTIN
RMTINCFG
Open/Close RMTINLOG
Space temperature off-

UNIT C.TYP = 5 or 6).
CCN
RANGE UNITS
POINT
Enable/ SPTOSENS
Disable
1 - 10 SPTO_RNG
+- SP.O.R ^F SPTO
RANGE
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
RANGE UNITS
Space Temperature Offset Sensor (Configuration
 
SENS SP.O.S) — This configuration disables the reading
of the offset slider.
Space Temperature
 
UNIT SENS
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

SPTO) — The Space Temperature Offset Value is the read-
ing of the slider potentiometer in the T56 that is resolved to
delta degrees based on SP.O.R.

TIME CLOCK CONFIGURATION

This section describes each Time Clock menu item. Not
every point will need to be configured for every unit. Refer to
the Controls Quick Start section for more information on what
set points need to be configured for different applications. The
Time Clock menu items are discussed in the same order that
they are displayed in the Time Clock table. The Time Clock
table is shown in Table 93.
Hour and Minute (HH.MM) —
of the time clock are displayed in 24-hour, military time. Time
can be adjusted manually by the user.
When connected to the CCN, the unit can be configured to
transmit time over the network or receive time from a network
device. All devices on the CCN should use the same time. Only
one device on the CCN should broadcast time or problems will
occur.
Month of Year (MNTH) —
month of the calendar year.
Day of Month (DOM) —
day (1 to 31) of the month.
Day of Week (DAY) —
of the week (Monday = 1 through Sunday = 7).
Year (YEAR) —
ample, 2005).
Local Time Schedule (SCH.L) —
used to program the time schedules. There are 8 periods
(PER.1 through PER.8). Each time period can be used to set
up a local schedule for the unit.
75
CCN POINT
FLTSLOGC Open
GASFANLG Open
RMTINLOG Open
ECOSWLOG Open
SFSLOGIC Open
DMD_SW1L Open
DMD_SW2L Open
IAQINLOG Open
FSDLOGIC Open
PRESLOGC Open
EVACLOGC Open
PURGLOGC Open
POINT
TEST Off
DISPUNIT Off
LANGUAGE 0
PASS_EBL Enable
PASSWORD 1111
Offset Range

SP.O.R) — This configuration establishes
The hour and minute
This variable is the current
This variable is the current
This variable is the current day
This variable is the current year (for ex-
This submenu is
DEFAULT
DEFAULT

UNIT
(Configuration

AIR.T