Specifications

18
JOHNSON CONTROLS
Form 201.28-NM1.EN.PED/CE (0211)
PRODUCT DESCRIPTION
EVAPORATOR OPTIONS:
38 mm INSULATION – Double thickness insulation
provided.
FLANGE KIT – Provides contractor with the couplings
best suited to tie into the chilled water piping. All flanges
are PN10.
CONNECTION LOCATION - The standard unit
configuration is available with fluid inlet connections at
rear (opposite control panel end) of unit. Option available
for front fluid inlet on select configurations.
WATER BOX HEATER - The standard unit comes
with freeze protection on the evaporator down to -17.8°C
(0°F).The waterbox heater option provides additional
freeze protection down to -28°C(-20°F).
CONTROLS OPTIONS:
HIGH AMBIENT OPERATION – This provides
special control logic coupled with high airflow fans to
permit high ambient (up to 55°C (130°F)) operation.
Fans are airfoil type blades with high power motors.
This option may also allow for increased machine
capacity, allowing the selection of a smaller chassis to
meet specific capacity requirements.
BUILDING AUTOMATION SYSTEM INTERFACE
(TEMPERATURE) - Factory installed option to accept
a 4 to 20 mA or a 0 to 10 VDC input to allow remote reset
of the Leaving Chilled Liquid Temperature Setpoint. The
setpoint can be positively offset upwards up to 22.2°C
(40°F). This option is useful for ice storage or process
applications or for periods where higher chilled liquid
temperatures are adequate for low loads. Available alone
or in combination with BAS Load Limit.
BUILDING AUTOMATION SYSTEM INTERFACE
(LOAD LIMIT) - Factory installed option to accept
a 4 to 20 mA or a 0 to 10 VDC input to allow remote
reset of the Load Limit Setpoint. The setpoint can limit
system demand from 30-100%. Available alone or in
combination with BAS Temperature Reset.
E-Link – The E-Link gateway provides communication
or Building Automation Systems, including BACnet
(MS/TP), Modbus, LON and N2.
THERMAL STORAGE – Provides special control
logic and modifications to produce leaving chilled
brine temperatures below 4.4°C (40°F) primarily at
times of low ambient temperatures (night time). Option
can be used to produce ice to supplement cooling and
significantly decrease energy costs. The capability of the
chiller is enhanced by using both ice and chilled water
simultaneously during times of peak cooling needs.
GENERAL OPTIONS:
FLOW SWITCH ACCESSORY - Vapor proof SPDT,
NEMA 3R switch, 10.3 barg (150 psig) DWP, -29°C to
121°C (-20°F to 250°F) with 1" NPT (IPS) connection
for upright mounting in horizontal pipe (This flow switch
or equivalent must be furnished with each unit). Field
mounted.
DIFFERENTIAL PRESSURE SWITCH – This 0.2-3
barg (3-45 psig) range switch, with 1/4" NPTE pressure
connections, is an alternative to the paddle-type flow
switch. Field mounted.
SERVICE ISOLATION VALVE – Service suction
isolation
valve added to unit for each refrigerant circuit.
DUAL PRESSURE RELIEF VALVE – Two safety
relief valves are mounted in parallel; one is always
operational to assist in valve replacement during
maintenance.
CIRCUIT BREAKER – A unit-mounted circuit breaker
with external lockable handle will be supplied to isolate
the single point power voltage for servicing. The
circuit breaker is sized to provide motor branch circuit
protection, short circuit protection and ground fault
protection for the motor branch-circuit conductors, the
motor control apparatus and the motors.
NON-FUSED DISCONNECT SWITCH – Unit-
mounted disconnect switch with external lockable handle
can be supplied to isolate the unit power voltage for
servicing. Separate external fusing must be supplied by
the power wiring, which must comply with local codes.
VIBRATION ISOLATION:
ELASTOMERIC ISOLATION – This option is
recommended for normal installations. It provides very
good performance in most applications for the least cost.
Field mounted.
25 mm (1") SPRING ISOLATORS – Spring and cage
type isolators for mounting under the unit base rails are
available to support unit. They are level adjustable.
25 mm (1") nominal deflection may vary slightly by
application. Field mounted.
50 mm (2") RESTRAINED SPRING ISOLATORS –
Restrained Spring-Flex Mounting isolators incorporate a
rugged welded steel housing with vertical and horizontal
limit stops. Housings designed to withstand a minimum
1.0g accelerated force in all directions up to 51 mm (2").
The deflection may vary slightly by application. They
are level adjustable. Field mounted.