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Carrier 50PG20 User Manual

Carrier 50PG20
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36
Control Configuration Checklist — Refer to check-
list CL-1 for recording site specific unit control configurations.
Programming Operating Schedules — The
ComfortLink™ controls will accommodate up to eight differ-
ent schedules (Periods 1 through 8), and each schedule is
assigned to the desired days of the week. Each schedule
includes an occupied on and off time. As an example, to set an
occupied schedule for 8 AM to 5 PM for Monday through
Friday, the user would set days Monday through Friday to ON
for Period 1. Then the user would configure the Period 1
Occupied From point to 08:00 and the Period 1 Occupied To
point to 17:00. To create a different weekend schedule, the user
would use Period 2 and set days Saturday and Sunday to ON
with the desired Occupied On and Off times.
NOTE: By default, the time schedule periods are programmed
for 24 hours of occupied operation.
To create a schedule, perform the following procedure:
1. Scroll to the Configuration mode, and select CCN
CONFIGURATION (CCN). Scroll down to the Schedule
Number (Configuration
CCN
SCH.O=SCH.N). If
password protection has been enabled, the user will be
prompted to enter the password before any new data is
accepted. SCH.N has a range of 0 to 99. The default val-
ue is 1. A value of 0 is always occupied, and the unit will
control to its occupied set points. A value of 1 means the
unit will follow a local schedule, and a value of 65 to 99
means it will follow a CCN schedule. Schedules 2-64 are
not used as the control only supports one internal/local
schedule. If one of the 2-64 schedules is configured, then
the control will force the number back to 1. Make sure the
value is set to 1 to use a local schedule.
2. Enter the Time Clock mode. Scroll down to the LOCAL
TIME SCHEDULE (SCH.L) sub-mode, and press
. Period 1 (PER.1) will be displayed.
3. Scroll down to the MON point. This point indicates if
schedule 1 applies to Monday. Use the com-
mand to go into Edit mode, and use the or key to
change the display to YES or NO. Scroll down through
the rest of the days and apply schedule 1 where desired.
The schedule can also be applied to a holiday.
4. Configure the beginning of the occupied time period for
Period 1 (OCC). Press to go into Edit mode,
and the first two digits of the 00.00 will start flashing. Use
the or key to display the correct value for hours,
in 24-hour (military) time. Press and hour value
is saved and the minutes digits will start flashing. Use the
same procedure to display and save the desired minutes
value.
5. Configure the unoccupied time for period 1 (UNC). Press
to go into Edit mode, and the first two digits of
the 00.00 will start flashing. Use the or key to
display the correct value for hours, in 24-hour (military)
time. Press and hour value is saved and the
minutes digits will start flashing. Use the same procedure
to display and save the desired minutes value.
6. The first schedule is now complete. If a second schedule
is needed, such as for weekends or holidays, scroll down
and repeat the entire procedure for period 2 (PER.2). If
additional schedules are needed, repeat the process for as
many as are needed. Eight schedules are provided. See
Table 35 for an example of setting the schedule.
SERVICE TEST
The Service Test function can be used to verify proper oper-
ation of compressors, heating stages, indoor fan, outdoor fans,
power exhaust fans, economizer, and alarm relay. Use of
Service Test is recommended at initial system start up and dur-
ing troubleshooting. See Table 36.
Service Test mode has the following changes from normal
operation:
Normal compressor timeguards and other staging delays
are reduced to 30 seconds or less.
Circuit alerts are limited to 1 strike (versus 3) before
changing to alarm shut down state.
The status of ALM.N is ignored so all alerts and alarms
are broadcast on CCN.
The words “SERVICE TEST” are inserted into every
alarm message.
Service test can only be turned ON/OFF at the unit display.
Once turned ON, other entries may be made with the display or
through CCN.
NOTE: Service Test mode may be password protected. Refer
to Scrolling Marquee section on page 3 for more information.
To turn Service Test on, change the value of TEST to ON.
To turn service test off, change the value of TEST to OFF.
The independent (INDP) submenu is used to change output
status for the economizer, power exhaust stages, and the alarm
relay. These independent outputs can operate simultaneously
with other Service Test modes. All outputs return to normal
operation when Service Test is turned off. When the economiz-
er is using the factory default Digital Control Type (Configura-
tion
ECON
E.CTL is 1 or 2) then the Economizer Calibra-
tion feature may be used to automatically check and reset the
economizer actuator range of motion.
The fans (FANS ) submenu is used to change output status
for the indoor fan and outdoor fan stages.
The cooling (COOL) submenu is used to change output sta-
tus for the individual compressors. Compressor starts are stag-
gered by 15 seconds. The fans (FANS) and heating (HEAT)
service test outputs are reset to OFF for the cooling service test.
Indoor fans and outdoor fans are controlled normally to main-
tain proper unit operation. All normal cooling alarms and alerts
are functional.
When charging unit, all outdoor fans may be forced on in
cooling service test modes by setting the Outdoor Fan Override
(OF.OV) to on.
NOTE: Circuit A is always operated with Circuit B in
Humidi-MiZer™ system equipped units.
For units with the factory Humidi-MiZer option, the
Humidi-MiZer (HZMR) submenu is used to change the output
status to operate the circuits in different Humidi-MiZer modes
or to separately test the Humidi-MiZer valve operations. The
fans (FANS), cooling (COOL), and heating (HEAT) service
test outputs are reset to OFF for the Humdi-MiZer service test.
Indoor and outdoor fans are controlled normally to maintain
proper unit operation. All normal cooling alarms and alerts are
functional.
The heating (HEAT) submenu is used to change output sta-
tus for the individual heat stages, gas or electric. The fans
(FANS) and cooling (COOL) service test outputs are reset to
OFF for the heating service test. Indoor and outdoor fans are
controlled normally to maintain proper unit operation. All nor-
mal heating alarms and alerts are functional.
NOTE: Field terminal strip terminal R must be connected to
W1 for the heat to operate in service test. Alert number T410
will occur as a reminder if not done. If the normal unit control
mode is thermostat mode, then remove the R-W1 jumper after
completing service test.
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER

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Carrier 50PG20 Specifications

General IconGeneral
BrandCarrier
Model50PG20
CategoryAir Conditioner
LanguageEnglish

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