JOHNSON CONTROLS
99
SECTION 5 – SEQUENCE OF OPERATION
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
5
•
The outdoor air is not 20.0° F or more warmer then
the
“SUPPLY AIR TEMP ALARM SETPOINT
FOR COOLING”
setpoint.
•
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.
Economizer Minimum Position Alarm
The supply air temperature must be above the
“SUP-
PLY AIR TEMP ALARM SETPOINT FOR COOLING”
setpoint and the following sequence of events have oc-
curred:
•
All the stages of cooling must have been ON for
10 or more minutes.
•
The outdoor air is 20.0° F or more warmer then
the
“SUPPLY AIR TEMP ALARM SETPOINT
FOR COOLING”
setpoint.
•
The economizer must be open more than 20%.
If the preceding criteria is met:
1. The Simplicity Elite control will close the outdoor
damper for ten minutes.
2. After ten minutes, the Simplicity Elite control will
read the supply air temperature.
a. If the supply air temperature is below the
“SUPPLY AIR TEMP ALARM SETPOINT
FOR COOLING”
, the control will keep the
outdoor damper closed and complete the
cooling cycle. The Simplicity Elite control
will declare an
“ECONOMIZER MINIMUM
POSITION”
alarm and flash an Alarm Code
40.
b. If the supply air temperature is not below the
“SUPPLY AIR TEMP ALARM SETPOINT
FOR COOLING”
, the Simplicity Elite con-
trol will declare a
“SUPPLY AIR TEMP
ALARM SETPOINT FOR COOLING”
alarm
and flash an Alarm Code 38.
3. After the cooling cycle is completed, the Simplic-
ity Elite control sets the outdoor damper to its
minimum position.
4. In order to reset the above alarms power to the
unit must be cycled ON and OFF.
ALARM HISTORY
The last five alarms can be viewed on the Simplicity
Elite control board as follows (the sequence below
gives the alarms from the most recent to the oldest):
Alarm 1 – The most recent alarm can be viewed
under Parameter 72 using the PROGRAM key on
the Simplicity Elite control board.
Alarm 2 – The next alarm in sequence can be
viewed under Parameter 73 using the PROGRAM
key on the Simplicity Elite control board.
Alarm 3 - The next alarm in sequence can be
viewed under Parameter 74 using the PROGRAM
key on the Simplicity Elite control board.
Alarm 4 - The next alarm in sequence can be
viewed under Parameter 75 using the PROGRAM
key on the Simplicity Elite control board.
Alarm 5 - The next alarm in sequence can be
viewed under Parameter 76 using the PROGRAM
key on the Simplicity Elite control board.
The preceding alarms can also be viewed using the
ALARMS tab in the Simplicity PC software program.
Содержание 050
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Страница 113: ...JOHNSON CONTROLS 113 SECTION 6 USER INTERFACE FORM 100 50 NOM6 ISSUE DATE 8 07 2017 6 ECONOMIZER EXHAUST LD13018 ...
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