13
JOHNSON CONTROLS
FORM 150.68-ICOM1
ISSUE DATE: 10/15/2020
• Compressor run status
• No load condition
• Day, date and time
• Daily start/stop times
• Holiday status
• Automatic or manual system lead/lag control
• Lead system denition
• Compressor starts & operating hours (each compressor)
• Status of heat exchanger heater and fan operation
• Run permissive status
• Number of compressors running
• Mode solenoid valve status
• Load & unload timer status
• Liquid pump status
System Safeties:
Cause individual compressors to perform auto shut
down and require manual reset in the event of 3 trips in
a 90-minute time period:
• High discharge pressure
• Low suction pressure
• Low suction superheat
• High-pressure switches
• Motor protector
Unit Safeties:
They are automatic reset and cause compressor to shut
down:
• Low leaving chilled liquid temperature
• Under voltage
• Loss of liquid ow (through ow switch)
For each system a common alarm contact for:
• Low leaving chilled liquid temperature
• Low voltage
• Low battery
• High discharge pressure (per system)
• Low suction pressure (per system)
• Compressor motor protection
ACCESSORIES AND OPTIONS
Flow Switch
The ow switch or its equivalent must be furnished with
each unit. 150 psig (10.5 bar) DWP - For standard units.
Johnson Controls model F61MG-1C Vapor-proof SPDT,
NEMA 3R switch (150 PSIG [10.5 bar] DWP), -20°F
to 250°F (-29°C to 121°C), with 1” NPT connection for
upright mounting in horizontal pipe. (Field-mounted)
Chicago Code Relief Valves
The unit will be provided with relief valves to meet
Chicago code requirements. (Factory mounted)
Neoprene Pads Isolators
Recommended for normal installations (Field mounted)
1" Spring Isolators
Level adjustable, spring and cage type isolators for
mounting under the unit base rails (Field mounted)
2" Spring Isolators
Restrained Spring-Flex Mountings incorporating a
rugged welded steel housing with vertical and horizontal
limit stops. (Field mounted)
Flange Kit
Provides contractor with the couplings best suited to
tie into the chilled water piping. All anges are PN10.
Single-Point Supply Terminal Block
Includes enclosure, terminal-block and interconnecting
wiring to the compressors. Separate external protection
must be supplied, by others, in the incoming compressor-
power wiring. (Do not include this option if either the
Single-Point Non-Fused Disconnect Switch or Single-
Point Circuit Breaker options have been included.)
Single-Point Circuit Breaker
A unit mounted circuit breaker with external, lockable
handle (in compliance with N.E.C. Article 440-14), can
be supplied to isolate the power voltage for servicing.
This option includes the Single-Point Power connection.
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