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FORM 150.73-NM2
ISSUE DATE: 09/07/2020
• Low ambient temperature cutout setting
• English or Metric data
• Suction pressure cutout setting
• Each system suction pressure
• System discharge pressure
• Discharge Air Temperature Reset via a YORK
ISN DDC or Building Automation System (by
others) via:
- a pulse width modulated (PWM) input as stan-
dard
- a 4-20 milliamp or 0 -10 VDC input, or contact
closure with the optional B.A.S. interface option
• Anti-recycle timer status for each system
• Anti-coincident system start timer condition
• Compressor run status
• No cooling load condition
• Day, date and time
• Daily start/stop times
• Holiday status
• Automatic or manual system lead/lag control
(Discharge Air Temperature control only)
• Automatic lead/lag of compressors within a sys-
tem
• Compressor starts & operating hours (each com-
pressor)
• Status of hot gas valves, and fan operation
• Run permissive status
• Number of compressors running
• Liquid solenoid valve status
• Load and unload timer status
Provisions are included for: pumpdown at shutdown;
optional remote discharge air temperature reset and
two steps of demand load limiting from an external
building automation system. Unit alarm contacts are
standard.
* Intensity of Protection European Standard
** International Electrotechnical Commission
JOHNSON CONTROLS
SECTION 2 – PRODUCT DESCRIPTION
The operating program is stored in non-volatile mem-
ory (EPROM) to eliminate condensing unit failure due
to AC powered failure/battery discharge. Programmed
setpoints are retained in lithium battery-backed RTC
memory for 5 years minimum.
HIGH AMBIENT KIT
Required if units are to operate when the ambient tem-
perature is above 115°F (46°C). Includes sun shield
panels and discharge pressure transducers. (This option
includes the Discharge Pressure Transducer /Readout
Capabil ity option). (Field mounted).
COMMUNICATIONS
• Native communication capability for BACnet
(MS/TP) and Modbus.
• Optional communication available for N2 and
LON via eLink option.
POWER PANEL
Each panel contains:
• Compressor power terminals
• Compressor motor starting contactors per
I.E.C.*
• Control power terminals to accept incoming for
115-1-60 control power
• Fan contactors and overload current protection
The power wiring is routed through liquid-tight con-
duit to the compressors and fans.
2
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