Loadshed; Sequence Of Operation; Dirty Filter; Metric Operation - York ECO2 YPAL 050 Installation & Operation Manual

Sequence of Operation

The Simplicity Elite control will keep the compressors
off line for 5 minutes. After 5 minutes, the Simplicity
Elite control will turn the compressor back on with a 30
second delay between compressors and resume normal
operation.
After 5 minutes Simplicity Elite control will reset this
communicated input back to "OFF" regardless of the
communicated status. To initiate another cycle the
communicated value would have to switch to the low
state "OFF" and then back to the high state "ON".

LOADSHED

This feature can be used to temporally reduce the
electrical consumption of the unit by turning off all the
active compressors. The feature is only available as a
communicated input to the Simplicity Elite control. The
BACnet name is SET_LOADSHED and the BACnet
instance number is BV13. For Modbus use address
(HEX) 41L, address (DEC) 65L Bit 1.
Sequence of Operation
If compressors are energized when the Simplicity Elite
control receives this command the Simplicity Elite
control will turn off all compressor immediately, even
if the minimum run time requirement has not been met
for the compressor.
The Simplicity Elite control will keep the compressors
off line for 5 minutes. After 5 minutes, the Simplicity
Elite control will turn the compressor back on and
resume normal information. The same compressors that
were running before the Loadshed input was received
will be turned back on with a 30 second delay between
compressors.
After 5 minutes, Simplicity Elite control will reset this
communicated input back to "OFF" regardless of the
communicated status. To initiate another cycle the
communicated value would have to switch to the low
state "OFF" and then back to the high state "ON".

DIRTY FILTER

A adjustable differential pressure switch can be a added
to the unit to monitor the fi lters and initiate an alarm
when the pressure drop across the fi lters become greater
than the setting of the switch. When the switch closes,
the alarm will be initiated.
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In order to use this feature a pressure switch must be
installed and the feature enabled. To enable the dirty
fi lter feature.
"DIRTY FILTER SWITCH INSTALLED" – must be
enabled using Parameter 51 under the PROGRAM
key of the Simplicity Elite control board or under the
EQUIPMENT INSTALLATION tab in the Simplicity
PC software package.
Sequence of Operation
The control monitors the voltage input at terminals
"FILT" at the P22 connector on the Simplicity Elite
control board. If the status goes high, 24 volt input,
for ten minutes the Simplicity Elite control will initiate
an Alarm 23 "Dirty Filter Switch Has Tripped" but the
operation of the unit will continue.
As soon as the 24-volt input is removed from the input
terminals, the alarm will turn off.

METRIC OPERATION

When this feature is turned on all the temperature data
will be converted to metric.
The following must be enabled for Metric Operation:
"METRIC OPERATION"- must be enabled using
Parameter 57 under the PROGRAM key on the
Simplicity Elite control board.

INTELLI-START

This feature can be used to energize the heating or
cooling function of the unit to bring the temperature of
the space up to the "CV OCCUPIED COOLING" and
"CV OCCUPIED HEATING" set points prior to the
start of the occupied period.
The following parameter must be programmed in order
to use this feature:
"INTELLI-START OPERATION ENABLE" – must be
enabled under the SYSTEMS OPTIONS tab of the
Simplicity PC software package.
The following criteria must be met for Morning Warm-
up operation:
FORM 100.50-NOM6 (1207)
JOHNSON CONTROLS