Controls, Start-Up, Operation, Service and ... - Climayoreo

Temperature Compensated Start Cooling Factor (TCS.H) —
This factor is used in the equation of the Temperature Compensated
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.
Fan Fail Shuts Downs Unit (SFS.S) — When fan status
monitoring is configured on, this configuration 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) include a process for
sampling the return-air temperature during unoccupied periods
to prove a valid demand for heating or cooling before initiating
an unoccupied heating or cooling mode. If the sampling routine
runs but concludes a valid demand condition does not exist,
the sampling process will not be permitted for the period of
time defined by this configuration. Reducing this value allows
a more frequent re-sampling process. Setting this value to zero
will prevent 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 processing 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 (evaporator
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 control
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 economizer option
is disabled. The configuration is adjustable from 0 to 100%
outside air. This defines the fixed ventilation position that will
be used to correctly calculate MAT.
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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 include an altitude parameter
which will serve to set up a default barometric pressure for
use with calculations. The effect of barometric pressure in
these calculations is not great, but could have an effect depending
on the installed elevation of the unit. If the rooftop is
installed at a particularly high altitude and enthalpy or cfm are
being calculated, set this configuration to the current elevation
of the installed rooftop.
Start Up Delay Time (DLAY) — This option inhibits the unit
from operating after a power reset. The configuration may be
adjusted from 0 to 900 seconds of delay.
Auxiliary Relay Output Configuration (AUX.R) — This
configuration allows the user to configure the function of the
auxiliary relay output. The output is 1.4 vac, 5 va maximum.
The configuration can be set from 0 to 3. If AUX.R is set to 0,
the auxiliary relay contact will be energized during an alarm.
The output can be used to turn on an indicator light or sound an
alarm in a mechanical room. If AUX.R is set to 1, the auxiliary
relay will energize when the controls determine dehumidification/reheat
is needed. The relay would be wired to a third party
dehumidification/reheat device and would energize the device
when needed. If AUX.R is set to 2, the auxiliary relay will energize
when the unit is in the occupied state. The relay could then
be used to control lighting or other functions that need to be on
during the occupied state. If AUX.R is set to 3, the auxiliary relay
will energize when the supply fan is energized (and, if
equipped with a VFD, the VFD output is not 0%). The default
is 0.
Space Temp Sensor (SPT.S) — If a space temperature sensor
is installed (T55/T56), enable this configuration.
Space Temp Offset Sensor (SP.O.S) — If a T56 sensor is installed
with the space temperature offset slider, enable this
configuration.
Space Temp Offset Range (SP.O.R) — If a space temperature
offset sensor is installed, it is possible to configure the
range of the slider by adjusting this range configuration.
Space Air RH Sensor (SRH.S) — If a space relative humidity
sensor is installed, enable this configuration.
Return RH Sensor (RRH.S) — If a return air relative humidity
sensor is installed, enable this configuration.
Filter Status Switch Enabled? (FLT.S) — If a filter status
switch is installed, enable this configuration to begin the monitoring
of the filter status input (InputsGEN.I FLT.S). See
the Dirty Filter Switch section for more details on installation
and operation.
Cooling Control — The P Series ComfortLink controls
offer two basic control approaches to mechanical cooling:
multi-stage cooling (CV) and multiple stages of cooling (VAV).
In addition, the ComfortLink controls offer the ability to run
multiple stages of cooling for either a space temperature sensor
or thermostat by controlling the unit to either a low or high cool
supply air set point. The control type (Configuration
UNITC.TYP) determines the selection of the type of cooling
control as well as the technique for selecting a cooling mode.
Unit staging tables are shown in Appendix C.
NOTE: Whether a unit has a VFD or a supply fan installed for
static pressure control has no effect on configuration of the
machine control type (C.TYP). No matter what the control
type, it is possible to run the unit in either CV or VAV mode
provided there are enough stages to accommodate lower air
volumes for VAV operation. Refer to the section on static pressure
control on page 64 for information on how to set up the
unit for the type of supply fan control desired.