130
JOHNSON CONTROLS
5276178-JIM-C-0118
Sequence of Operation
∆T
OC
OCC
COOL
∆T
OH
OCC
HEAT
∆T
UC
UNOCC
COOL
∆T
UH
UNOCC
HEAT
OCCUPANCY
MODE
UNIT MODE
ACTIVE SP
> 0.5 °F
---
---
---
OCCUPIED
OCCUPIED COOLING LOW
1ST STAGE COOLING SETPOINT
> 1.5 °F
---
---
---
OCCUPIED
OCCUPIED COOLING HIGH
2ND STAGE COOLING SETPOINT
---
< -0.5 °F
---
---
OCCUPIED
OCCUPIED HEATING LOW
1ST STAGE HEATING SETPOINT
---
< -1.5 °F
---
---
OCCUPIED
OCCUPIED HEATING HIGH
2ND STAGE HEATING SETPOINT
---
---
---
---
OCCUPIED
OCCUPIED STANDBY
(SEE ALSO COMFORT
VENTILATION OPERATION)
NONE
---
---
> 0.5 °F
---
UNOCCUPIED UNOCCUPIED COOLING LOW
1ST STAGE COOLING SETPOINT
---
---
> 1.5 °F
---
UNOCCUPIED UNOCCUPIED COOLING HIGH
2ND STAGE COOLING SETPOINT
---
---
---
< -0.5 °F
UNOCCUPIED UNOCCUPIED HEATING LOW
1ST STAGE HEATING SETPOINT
---
---
---
< -1.5 °F
UNOCCUPIED UNOCCUPIED HEATING HIGH
2ND STAGE HEATING SETPOINT
---
---
---
---
UNOCCUPIED UNOCCUPIED STANDBY
NONE
TABLE 70
-
ACTIVE SAT SET POINT DETERMINATION, ZONE TEMPERATURE
The
“1ST STAGE COOLING SETPOINT”
“
and
“2ND STAGE COOLING SETPOINT”
“
set points
are programmed into the User Interface through the
SETPOINTS key, COOLING subsection. The
“1ST
STAGE HEATING SETPOINT”
and
“2ND STAGE
HEATING SETPOINT”
set points are programmed
into the User Interface through the SETPOINTS key,
HEATING subsection.
Zone Temperature Control
When the
“CONTROL METHOD”
is set to
Zone Temperature Control (either hard-wired or
communicated), the
“SUPPLY AIR TEMP ACTIVE SP”
is determined by the difference between the
“ZONE
TEMP”
and the appropriate zone set point. Table 61
shows the parameters that are used to determine the
“SUPPLY AIR TEMP ACTIVE SP”:
Where:
∆T
OC
=
“ZONE TEMP” – “OCC ZONE COOLING
SETPOINT”
∆T
OH
=
“ZONE TEMP” – “OCC ZONE HEATING
SETPOINT”
∆T
UC
=
“ZONE TEMP” – “UNOCC ZONE COOL-
ING SETPOINT”
∆T
UH
=
“ZONE TEMP” – “UNOCC ZONE HEAT-
ING SETPOINT”
Variable Air Volume
The
“SUPPLY AIR TEMP ACTIVE SP”
is always
derived from three programmed parameters
“SAT HIGH
SETPOINT”
,
“SAT LOW SETPOINT”
and the
“SAT
RESET METHOD”
. The Unit Controller determines the
derived
“SUPPLY AIR TEMP ACTIVE SP”
value to use
based on the reset command sent to the controller. There
are four options available to select from for the reset
command method.
“SAT RESET METHOD”
can be
set for
“HARDWIRED”, “OUTSIDE AIR”, “RETURN
AIR”, or “SUPPLY FAN SPEED”.
If
“HARDWIRED”
is used and no input is available, the Unit Controller
will control to the
“SAT HIGH SETPOINT”
. The
following parameters are programmed through the
User Interface:
•
“SAT RESET METHOD”
– OPTIONS key /
UNIT DATA subsection
•
“SAT LOW SETPOINT” –
SETPOINTS key /
COOLING subsection
•
“SAT HIGH SETPOINT”
– SETPOINTS key /
COOLING subsection
•
“OAT SETPOINT FOR LOW SAT” -
SETPOINTS
key / COOLING subsection
•
“OAT SETPOINT FOR HIGH SAT”
–
SETPOINTS key / COOLING subsection
•
“RAT SETPOINT FOR LOW SAT”
–
SETPOINTS
key / COOLING subsection
•
“RAT SETPOINT FOR HIGHH SAT”
–
SETPOINTS key / COOLING subsection
•
“FAN SPEED SETP FOR LOW SAT”
–
SETPOINTS key / COOLING subsection
•
“
FAN SPEED SETP FOR HIGH SAT”
–
SETPOINTS key / COOLING subsection
Содержание 40 25 TON
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