Johnson Controls 050, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
91
SECTION 5 – SEQUENCE OF OPERATION
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
5
The “HYDRONIC HEAT ACTUATOR VALVE RE-
VERSE ACTING”
(Parameter 21) point in the Simplic-
ty Elite control will determine the voltage sent to the
Hydronic Actuator for open/close operation.
The default setting under Parameter 21 is OFF which
allows for the Hydronic Heat Actuator output to be 2
VDC for 0% opening of the hydronic valve and 10VDC
for 100% opening of the hydronic valve.
When the
“HYDRONIC HEAT ACTUATOR VALVE
REVERSE ACTING”
is enabled (ON) using Parameter
21 under the PROGRAM key of the Simplicity Elite
control board or under the HEATING SETUP tab in the
Simplicity PC software package the control will output
10VDC for 0% opening and 0VDC for 0% opening of
the hydronic valve.
HYDRONIC HEAT FREEZE STAT
All hydronic heat units are equipped with a freeze stat
that monitors the temperature of the return air. The
switch action is normally closed and opens when the
return air temperature is less the 40.0° F. The 24VAC
signal to the freeze stat originates at terminal FSP on
the control board. The 24VAC input from the freeze
stat enters the control at the FSI terminal.
When the freeze stat input is lost, the Simplicity Con-
trol will send a 10VDC signal to the valve (direct act-
ing), 2 VDC (reverse acting) to open the valve. The
valve will continue to drive open for 5 minutes, even if
the freeze stat circuit remakes. If the freeze stat circuit
closes and the 5 minute timing has expired, the unit
will return to normal operation.
If the supply fan is operating and the outdoor damper
is open the Simplicity Control will close the damper
during the above sequence.
VENTILATION
The unit can be ordered / programmed for the follow-
ing ventilation options:
• None.
• Manual.
• Fixed Minimum – Economizer option required.
• Demand Ventilation – Economizer option re-
quired.
Manual
This option uses a manually adjustable outdoor air
damper that can set in a fixed position to control the
amount of outdoor air that is brought into the building
for ventilation. As long as the supply fan is operative,
ventilation air will be brought into the building. To ad-
just the damper:
1. Loosen the wing nut that holds the adjustment
handle in a fixed position .
2. Move the handle to the desired position.
3.
T
ighten the wing nut to hold the handle in the de-
sired position.
Fixed Minimum
The following parameters must be programmed to en-
able Fixed Minimum 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.
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”.