Johnson Controls 050, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
92
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
SECTION 5 – SEQUENCE OF OPERATION
Demand Ventilation
In this mode the Simplicity Elite control monitors the
CO
2
level in the conditioned space. The Simplicity
Elite control modulates the outdoor air damper beyond
the “ECONOMIZER MINIMUM POSITION” in order
to keep the CO
2
level within plus or minus 100 PPM of
the
“IAQ SETPOINT”.
In order to use this feature a CO
2
sensor must be in-
stalled in the conditioned space and connected to
“DV+” and the “DV-“ terminals of the P20 connector.
The following parameters must be programmed to en-
able Demand Ventilation:
• “ECONOMIZER INSTALLED” – must be en-
abled using Parameter 32 under the PROGRAM
key on the Simplicity Elite control board or under
the ECONOMIZER/EXHAUST tab in the Sim-
plicity PC software package.
•
“ECONOMIZER MINIMUM POSITION”
– must
be programmed using Parameter 35 under the
PROGRAM key on the Simplicity Elite control
board or under the ECONOMIZER/EXHAUST
tab in the Simplicity PC software package.
• “DEMAND VENTILATION (IAQ) ENABLED”
– must be enabled using Parameter 40 under the
PROGRAM key of the Simplicity Elite control
board or under the COMFORT / DEMAND VEN-
TILATION tab in the Simplicity PC software
package.
• “IAQ SENSOR RANGE” - must be programmed
using Parameter 41 under the PROGRAM key
on the Simplicity Elite control board or under the
COMFORT / DEMAND VENTILATION tab in
the Simplicity PC software package.
• “IAQ SETPOINT” - must be programmed using
Parameter 42 under the PROGRAM key on the
Simplicity Elite control board or under the COM-
FORT / DEMAND VENTILATION tab in the
Simplicity PC software package.
• “MAXIMUM IAQ ECONOMIZER POSITION” –
must be programmed under the COMFORT / DE-
MAND VENTILATION tab in the Simplicity PC
software package.
Definitions
The following definitions apply to Demand Ventila-
tion:
•
“IAQ SENSOR RANGE”
–This establishes the
span the Simplicity Elite control uses in PPM.
0 PPM would be equal to a 0 volts input to the
Simplicity Elite control, “IAQ SENSOR RANGE”
would be equal to 10 volts input to the Simplicity
Elite control. The
“IAQ SENSOR RANGE”
must
match the PPM range of the sensor installed in the
conditioned space.
• “IAQ SETPOINT” – This is the conditioned space
CO
2
level the Simplicity Elite control is trying to
maintain.
• “MAXIMUM IAQ ECONOMIZER POSITION”
– This is the maximum damper position the Sim-
plicity Elite control will allow the damper to open
while in a Demand Ventilation mode no matter
how great a differential is between the conditioned
space CO
2
level and the “IAQ SETPOINT”.
Sequence of Operation
The damper will open to the programmed
“ECONO-
MIZER MINIMUM POSITION” whenever the follow-
ing conditions are met:
• The unit is in the occupied mode.
• There must be a 24-volt output from the Simplic-
ity Elite control to the supply fan control circuit.
The output is contained at the “FAN” terminal
of connector P13 on the Simplicity Elite control
board.
• When the economizer becomes active the position
of the dampers are controlled by the Economizer
PI logic which could move the dampers beyond
the “ECONOMIZER MINIMUM POSITION” ;
however, the Economizer PI logic can never close
the dampers less than the
“ECONOMIZER MINI-
MUM POSITION”.
If the above criteria are met, the Simplicity Elite con-
trol will then monitor the CO
2
level in the conditioned
space and vary the position of the outdoor air damper
between the “ECONOMIZER MINIMUM POSITION”
and the
“MAXIMUM IAQ ECONOMIZER POSI-
TION”
based on the following:
• The Simplicity Elite control will try to maintain
the CO
2
level in the conditioned space to plus or
minus 100 PPM of the “IAQ SETPOINT”.