Carrier Weathermaster 48P2030-100 Controls, Start-Up, Operation, Service, And Troubleshooting page 45

Unit Size (SIZE)
There are several unit sizes (tons) for the P Series control. Make
sure this configuration matches the size called out by the model
number of the unit. This is important as the cooling stage tables
are directly determined based on the SIZE configuration.
Fan Mode (FN.MD)
The Fan Mode configuration can be used for machine control

types (Configuration UNIT
Mode variable establishes the operating sequence for the sup-
ply fan during occupied periods. When set to 1 (Continuous),
the fan will operate continuously during occupied periods.
When set to 0 (Automatic), the fan will run only during a heat-
ing or cooling mode.
Remote Switch Config (RM.CF)
The remote switch input is connected to TB201 terminals 3
and 4. This switch can be used for several remote control func-
tions. Please refer to the Remote Control Switch Input section
for details on its use and operation.
CEM Module Installed (CEM)
This configuration instructs the control to communicate with
the controls expansion module (CEM) over the local equip-
ment network (LEN) when set to Yes. When the unit is config-
ured for certain sensors and configurations, this option will be
set to Yes automatically.
The sensors and configurations that automatically turn on this
board are:
 
Configuration UNIT SENS
Relative Humidity Sensor Enable)
 
Configuration UNIT SENS
Air Relative Humidity Sensor Enable)
 
Configuration EDT.R RES.S = Enable (4 to 20 mA Sup-
ply Air Reset Sensor Enable)
 
Configuration ECON ORH.S = Enable (Outside Air Rela-
tive Humidity Sensor Enable)
 
Configuration ECON CFM.C
Air CFM Sensor Enable)
 
Configuration DEHU D.SEN = 3 (DISCR.INPUT) (De-
humidification Sensor – Discrete Input Select)
 
Configuration DMD.L
mand Limiting using 2 discrete switches)
 
Configuration DMD.L
(Demand Limiting using a 4 to 20 mA sensor)
 
Configuration IAQ AQ.CF
(IAQ discrete switch control)
 
Configuration IAQ AQ.CF
(IAQ discrete switch "override" control)
 
Configuration IAQ AQ.CF
DAQ) (Outdoor Air Quality Sensor)
 
Configuration IAQ AQ.CF
(4 to 20 mA sensor, no DAQ)
 
Configuration SP SP.RS = 1 (4-20 mA control) (static
pressure reset using 4-20 mA input)
Temperature Compensated Start Cooling Factor (TCS.C)
This factor is used in the equation of the Temperature Compen-
sated Start Time Bias for cooling. Refer to the Temperature
Compensated Start section for more information. A setting of
0 minutes indicates Temperature Compensated Start in Cooling
is not permitted.
Temperature Compensated Start Cooling Factor (TCS.H)
This factor is used in the equation of the Temperature Compen-
sated Start Time Bias for heating. Refer to the Temperature
Compensated Start section for more information. A setting of
0 minutes indicates Temperature Compensated Start in Heating
is not permitted.

C.TYP) 3 and 4. The Fan

SRH.S = Enable (Space

RRH.S = Enable (Return

OCF.S = Enable (Outdoor
DM.L.S = 1 (2 SWITCHES) (De-
DM.L.S = 2 (4-20 MA CTRL)

IQ.I.C = 1 (IAQ DISCRETE)

IQ.I.C = 2 (IAQ DISC.OVR)

OQ.A.C = 1 (OAQ SENS-

OQ.A.C = 2 (4-20 NO DAQ)
Fan Fail Shuts Downs Unit (SFS.S)
When fan status monitoring is configured on, this configura-
tion will determine whether the unit should shut down on a
supply fan status fail or simply alert the condition and continue
to run. If set to YES, then the control will shut down the unit
and send out an alarm if supply fan status monitoring fails. If
set to NO, the control will not shut down the unit if supply fan
status monitoring fails but the control will send out an alert.
Fan Status Monitoring (SFS.M)
This configuration selects the type of fan status monitoring to
be performed.
0 - NONE — No switch or monitoring
1 - SWITCH — Use of the fan status switch
2 - SP RISE — Monitoring of the supply duct pressure.
VAV Unoccupied Fan Retry Time (VAV.S)
Machine control types 1 and 2 (VAV-RAT,VAV-SPT) monitor
the return-air temperature during unoccupied periods to deter-
mine if there is a valid demand for heating or cooling before
initiating an unoccupied heating or cooling mode. If the routine
runs but concludes a valid demand condition does not exist,
then the process is not permitted for the period of time defined
by this configuration. Reducing this value allows a more fre-
quent re-sampling process. Setting this value to zero will pre-
vent any sampling sequence.
50 Hertz Unit? (50.HZ)
This configuration is not used. Do not change the setting of this
configuration.
MAT Calc Config (MAT.S)
This configuration gives the user three options in the process-
ing of the mixed-air temperature (MAT) calculation:
• MAT.S = 0
There will be no MAT calculation.
• MAT.S = 1
The control will attempt to learn MAT over time. Any time
the system is in a vent mode and the economizer stays at a
particular position for long enough, MAT = EDT (evapora-
tor discharge temperature). Using this, the control has an
internal table whereby it can more closely determine the
true MAT value.
• MAT.S = 2
The control will stop learning and use whatever the control
has already learned. Using this setting infers that the con-
trol has spent some time set to MAT.S = 1.
First set MAT.S = 1, then go into the Service Test mode. Turn on
the fan and open the economizer to a static position for 5 minutes.
Move to several positions (20%,40%,60%,80%). It is important
that the difference between return and outside temperature be
greater than 5 degrees. (The greater the delta, the better.) When
done, set MAT.S = 2.
Reset MAT Table Entries? (MAT.R)
This configuration allows the user to reset the internally stored
MAT learned configuration data back to the default values. The
defaults are set to a linear relationship between the economizer
damper position and OAT and RAT in the calculation of MAT.
MAT Outside Air Position Default (MAT.D)
This configuration is used to calculate MAT when the econo-
mizer option is disabled. The configuration is adjustable from
0 to 100% outside air. This defines the fixed ventilation posi-
tion that will be used to correctly calculate MAT.
Altitude.........In Feet: (ALTI)
As the control does not include a barometric pressure sensor to
define the calculation of enthalpy and cfm, the control does in-
clude an altitude parameter which will serve to set up a default
barometric pressure for use with calculations. The effect of baro-
metric pressure in these calculations is not great, but could have
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