Johnson Controls 050, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
74
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
SECTION 5 – SEQUENCE OF OPERATION
The unit will initiate Occupied Heating when the fol-
lowing criteria is met:
• The space temperature is 2.0° F less than the
“VAV
OCCUPIED HEATING SETPOINT”
.
• The return air temperature is 0.1° F below the
“MORNING WARM UP / VAV RETURN AIR
TEMP SETPOINT” .
The unit will terminate Occupied Heating when the re-
turn air temperature is equal to the “MORNING WARM
UP RAT SETPOINT”.
The “VAV OCCUPIED HEATING SETPOINT” should
always be set below the
“MORNING WARM UP RAT
SETPOINT”
.
Heating – Unoccupied with a Hard Wired or
Communicated Space Sensor
The Simplicity Control cannot operate unoccupied
heating with this method of control.
Occupied Cooling – Stand Alone
The following System Parameters must be programmed
through the Simplicity Control for VAV Stand Alone
operation:
• “VAV COOLING SUPPLY AIR TEMP UPPER
SETPOINT” – using Parameter 23 under the
PROGRAM key on the Simplicity control board
or under the COOLING SETUP tab in the Sim-
plicity PC software package.
• “VAV COOLING SUPPLY AIR TEMP LOWER
SETPOINT” – using Parameter 24 under the
PROGRAM key on the Simplicity control board
or under the COOLING SETUP tab in the Sim-
plicity PC software package.
• “VAV SUPPLY AIR TEMP RESET SETPOINT”
– using Parameter 25 under the PROGRAM
key on the Simplicity control board or under the
COOLING SETUP tab in the Simplicity PC soft-
ware package.
• “SPACE SENSOR FAULT OVERRIDE EN-
ABLED” must be turned ON – using Parameter 8
under the PROGRAM key on the Simplicity con-
trol board or under the SYSTEM OPTIONS tab in
the Simplicity PC software package.
The Simplicity Control will control the operation of
the compressors as follows:
• If the return air temperature is 2.0° F or more
above the “VAV SUPPLY AIR TEMP RESET
SETPOINT” the control will use the “VAV COOL-
ING SUPPLY AIR TEMP LOWER SETPOINT”.
• If the return air temperature is not 2.0° F or more
above the “VAV SUPPLY AIR TEMP RESET
SETPOINT” the control will use the “VAV COOL-
ING SUPPLY AIR TEMP UPPER SETPOINT”.
• If the control is using the “VAV COOLING SUP-
PLY AIR TEMP LOWER SETPOINT” per above
the return air temperature must be equal to or
less than the “VAV SUPPLY AIR TEMP RESET
SETPOINT” before the control would switch to
the “VAV COOLING SUPPLY AIR TEMP UP-
PER SETPOINT”.
• The control uses a 5-degree dead band around the
cooling “VAV COOLING SUPPLY AIR TEMP
UPPER SETPOINT” or “VAV COOLING SUP-
PLY AIR TEMP LOWERT SETPOINT”.
• When the supply air temperature is 5.0° F or more
above the cooling “VAV UPPER COOLING SAT
SETPOINT” or “VAV LOWER COOLING SAT
SETPOINT” the Simplicity Control will energize
the first compressor.
• The control records the supply air temperature
right before the compressor is turned ON and
compares it to the supply air temperature after 5
minutes of operation.
• A second compressor will be turned ON if both of
the following criteria are met:
– The supply air temperature is still 5.0° F or
more, greater than the “VAV UPPER COOLING
SAT SETPOINT” or “VAV LOWER COOLING
SAT SETPOINT”.
– The Simplicity Control uses the temperature
difference calculated when the first compressor
was turned ON to verify the supply air tempera-
ture will not drop 5.0° F or more below the cool-
ing “VAV UPPER COOLING SAT SETPOINT”
or “VAV LOWER COOLING SAT SETPOINT”.
If turning ON a compressor would result in the
specified drop in supply air temperature, the sec-
ond compressor will not be turned ON.
• The same logic will be used to stage ON compres-
sor 3 and 4.