JOHNSON CONTROLS
83
SECTION 5 – SEQUENCE OF OPERATION
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
5
•
When the supply air te
mperature is between
“VAV COOLING SUPPLY TEMP UPPER SAT
SETPOINT”
and the
“VAV COOLING SUPPLY
TEMP UPPER SAT SETPOINT”
plus 5.0° F the
economizer damper movement will stop and main-
tain the current position.
•
When the supply air temperature is between
“VAV COOLING SUPPLY TEMP LOWER SAT
SETPOINT”
and the
“VAV COOLING SUPPLY
TEMP LOWER SAT SETPOINT”
plus 7.0° F the
economizer damper movement will stop and main-
tain the current position.
•
When the supply air temperature is equal to 5.1° F
or more above the
“VAV COOLING SUPPLY TEMP
UPPER SAT SETPOINT”
and 5 minutes has expired
since the economizer damper started to open, the
economizer damper will close back to its minimum
position and a second compressor will come ON.
•
When the supply air temperature is equal to 7.1° F
or more above the
“VAV COOLING SUPPLY TEMP
LOWER SAT SETPOINT”
and 5 minutes has ex-
pired since the economizer damper started to open,
the economizer damper will close back to its mini-
mum position and a second compressor will come
ON.
COMFORT VENTILATION
Comfort Ventilation is a Constant Volume control
mode that uses the economizer to control the supply
air temperature. When outdoor air conditions allow,
the economizer will modulate the outside / return air
mix to keep supply air temperatures within the upper
and lower Comfort Ventilation setpoints. The control
will modulate the economizer, and energize cooling or
heating if necessary, to keep the supply air temperature
within the Comfort Ventilation setpoints, even though
the space temperature requirements are satisfied.
The following criteria must be present in order for
Comfort Ventilation to function”:
•
The unit cannot be in an active heating or cooling
mode.
•
The unit must have an economizer installed.
•
The unit must be in the occupied mode.
•
The unit should be placed in the continuous in-
door fan operation mode.
•
The unit type must be Constant Volume.
TABLE 30 -
OPERATION DURING OFF CYCLE
OAT VS OAT COMFORT ZONE SAT VS SAT COMFORT ZONE ECON OPERATION HEAT STAGE COMP STAGE
BELOW
ABOVE
OPEN
-
-
BELOW
BELOW
-
TURN ON
BELOW
WITHIN
-
-
-
ABOVE
ABOVE
-
-
TURN ON
ABOVE
BELOW
OPEN
-
-
ABOVE
WITHIN
-
-
-
WITHIN
ABOVE
OPEN
-
-
WITHIN
BELOW
OPEN
-
-
WITHIN
WITHIN
-
-
-
TABLE 31 -
COMPRESSOR ON WHEN SPACE INPUT SATISFIED
OAT VS OAT COMFORT ZONE SAT VS SAT COMFORT ZONE ECON OPERATION HEAT STAGE COMP STAGE
BELOW
ABOVE
OPEN
-
TURN OFF
BELOW
BELOW
-
TURN ON
TURN OFF
BELOW
WITHIN
-
-
TURN OFF
ABOVE
ABOVE
-
-
LEAVE ON
ABOVE
BELOW
OPEN
-
LEAVE ON*
ABOVE
WITHIN
-
-
LEAVE ON
WITHIN
ABOVE
OPEN
-
TURN OFF
WITHIN
BELOW
OPEN
-
TURN OFF
WITHIN
WITHIN
-
-
TURN OFF
* If the economizer damper opens to 100%, the compressor will turn off and the economizer damper will remain at 100%.
The following parameters must be programmed:
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 ...
Страница 114: ...JOHNSON CONTROLS 114 FORM 100 50 NOM6 ISSUE DATE 8 07 2017 SECTION 6 USER INTERFACE FANS LD13019 ...
Страница 115: ...JOHNSON CONTROLS 115 SECTION 6 USER INTERFACE FORM 100 50 NOM6 ISSUE DATE 8 07 2017 6 COOLING SETUP LD13020 ...
Страница 116: ...JOHNSON CONTROLS 116 FORM 100 50 NOM6 ISSUE DATE 8 07 2017 SECTION 6 USER INTERFACE COOLING STATUS LD13021 ...
Страница 117: ...JOHNSON CONTROLS 117 SECTION 6 USER INTERFACE FORM 100 50 NOM6 ISSUE DATE 8 07 2017 6 HEATING SETUP LD13022 ...
Страница 118: ...JOHNSON CONTROLS 118 FORM 100 50 NOM6 ISSUE DATE 8 07 2017 SECTION 6 USER INTERFACE HEATING STATUS LD13023 ...
Страница 119: ...JOHNSON CONTROLS 119 SECTION 6 USER INTERFACE FORM 100 50 NOM6 ISSUE DATE 8 07 2017 6 SYSTEM OPTIONS LD13024 ...
Страница 120: ...JOHNSON CONTROLS 120 FORM 100 50 NOM6 ISSUE DATE 8 07 2017 SECTION 6 USER INTERFACE OUTPUTS STATUS LD13025 ...
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Страница 125: ...JOHNSON CONTROLS 125 SECTION 6 USER INTERFACE FORM 100 50 NOM6 ISSUE DATE 8 07 2017 6 ALARMS LD13031 ...