York ECO2 YPAL 050 - Manual (Page 96)

96 JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
Sequence of Operation
The following parameters must be programmed:
“SPACE TEMP TRENDING ALARM TEMP”- must
be programmed under SYSTEM OPTIONS tab of the
Simplicity PC software package.
“SPACE TEMP TRENDING ALARM TIME”- must
be programmed under SYSTEM OPTIONS tab of the
Simplicity PC software package.
Sequence of Operation
•
To enable this feature “SPACE TEMP TREND-
ING ALARM TEMP” must be set at other then
zero.
•
Set “SPACE TEMP TRENDING ALARM TEMP”
to the number of degrees above or below the
space temperature that you want temperature
trending to begin. The range is 1.0° F to 25.0° F
in 1.0° F increments.
•
To enable this feature “SPACE TEMP TREND-
ING ALARM TIME” must be set at other then
zero.
•
Set “SPACE TEMP TRENDING ALARM TIME”
to the amount of time the space temperature must
be trending above or below the “SPACE TEMP
TRENDING ALARM TEMP” before a Space
Temperature Alarm will be initiated. The range
is 1 to 120 minutes in 1 minute increments.
•
The unit must have been in a given operating
mode for 10 minutes before trending will be-
gin.
•
Every time the trend moves towards the space
temperature set point the “SPACE TEMP
TRENDING ALARM TIME” will reset to zero
•
When the temperature is above or below the
“SPACE TEMP TRENDING ALARM TEMP”
and the trend continues to be away from the space
temperature and the “SPACE TEMP TRENDING
ALARM TIME” has expired, the Simplicity Elite
control will declare a “SPACE TEMPERATURE”
Alarm. The Simplicity Elite control will fl ash an
Alarm Code 41.
•
The Simplicity Elite control will continue normal
operation while in this fault mode.
•
The Simplicity Elite control will continue to
show the fault until the space temperature is less
then the “SPACE TEMP TRENDING ALARM
TEMP”.
SAT ALARM FOR HEATING
When this feature is turned on, the Simplicity Elite
control monitors the supply air temperature in the
heating mode and will generate an alarm if the supply air
temperature goes below the set point, and if conditions
are met, modifi es the amount of ventilation air to keep
the supply air temperature above this set point when all
the heating stages are energized. This feature can only
be used on unit operating in the VAV mode.
In order to use this feature the following parameter must
be programmed:
“SUPPLY AIR TEMP ALARM SETPOINT FOR
HEATING” – must be set under the HEATING SETUP
tab of the Simplicity PC software package.
•
If “SUPPLY AIR TEMP ALARM SETPOINT
FOR HEATING” is set to zero this feature is dis-
abled. If not set to zero, then the setting becomes
the alarm set point.
•
Set “SUPPLY AIR TEMP ALARM SETPOINT
FOR HEATING” to the temperature you want
to use for the Alarm set point. The range is 1.0°
F to 120.0° F in 1.0° F increments.
Sequence of Operation
“Supply Air Temp Alarm Setpoint for Heating”
Alarm
•
The control will initiate a “SUPPLY AIR TEMP
ALARM FOR HEATING” and fl ash an Alarm
Code 39 if the following conditions are met:
– All the stages of heating have been on for 10
or more minutes.
– The supply air temperature is 20 degrees
below the “SUPPLY AIR TEMP ALARM
SETPOINT FOR HEATING” set point for 10
minutes.
– The outdoor air is not 20.0° F or more cooler
then the “SUPPLY AIR TEMP ALARM
SETPOINT FOR HEATING” set point.
– The outdoor air damper is not open more than
20%
•
In order to reset the above Alarm power to the
unit must be cycled on and off.