18
JOHNSON CONTROLS
Accessories and Modifications
SOLID STATE STARTER
The Solid State Starter is a reduced voltage starter that
controls and maintains a constant current flow to the motor
during startup. It is compact and mounted on the chiller at
the motor terminals. power and control wiring is factory
supplied. Available for 200-600 volts, the starter enclosure
is NeMA-1 with a hinged access door with lock and key.
electrical lugs for incoming power wiring are provided.
Standard features include: digital readout at the OptiView
Control Center of the following:
Display Only:
• 3-phase voltage A, B, C
• 3-phase current A, B, C
• Input power (kw)
• kw Hours
• Starter Model
• Motor Run (LeD)
• Motor Current % Full Load Amps
• Current Limit Setpoints
• pulldown Demand Time Left
Programmable:
• Local Motor Current Limit
• pulldown Demand Limit
• pulldown Demand Time
Other features include: low line voltage; 115-volt control
transformer; three-leg sensing overloads; phase rotation
and single-phase failure protection; high temperature
safety protection; motor current imbalance and undervolt-
age safeties; open and close SCR protection; momentary
power interruption protection. The LCSSS is cooled by a
closed-loop, fresh water circuit consisting of a water-to-
water heat exchanger and 1/25 Hp circulating pump. All
interconnecting water piping is factory installed and rated
for 150 pSIG working pressure.
Optional
unit-mounted
circuit breaker includes ground fault protection and
provides 65,000 amp short-circuit withstand rating in ac-
cordance with UL Standard 508. A non-fused disconnect
switch is also available. Both options are padlockable.
BAS REMOTE CONTROL
A communication interface permitting complete exchange
of chiller data with any BAS system is available with
optional ISN translator. ISN translator also allows BAS
system to issue commands to the chiller to control its
operation. ISN translators come in two models, controlling
up to four chillers and eight chillers respectively.
FACTORY INSULATION OF COOLER
Factory-applied thermal insulation of the flexible, closed-
cell plastic type, 3/4” (19mm) thick is attached with va-
por-proof cement to the evaporator shell, flow chamber,
evaporator tube sheets, suction connection, and (as
necessary) to the auxiliary tubing. Not included is the
insulation of water boxes and nozzles. This insulation
will normally prevent condensation in environments with
relative humidities up to 75% and dry bulb temperatures
ranging from 50° to 90°F (10° to 32°C). 1-1/2” (38mm)
thick insulation is also available for relative humidities up
to 90% and dry bulb temperatures ranging from 50° to
90°F (10° to 32°C).
wATER FLANGES
Four 150 Ib. ANSI raised-face flanges, for condenser and
evaporator water connections, are factory welded to water
nozzles. Companion flanges, bolts, nuts and gaskets are
not included.
SPRING ISOLATION MOUNTING
Spring Isolation mounting is available instead of standard
isolation mounting pads when desired. Four level-adjust
-
ing/spring-type vibration isolator assemblies with non-skid
pads are provided with mounting brackets for field instal
-
lation. Isolators are designed for one-inch (25.4 mm)
deflection.
wATER FLOw SwITCHES
Paddle-type, vapor-proof water flow switches suitable
for 150 psig (1034 Kpa) Dwp for chilled and condenser
water circuits. Switch for 115V-1-50/60 Hz service. A
chilled water flow switch is required. Condenser water
flow switch is optional.
SEqUENCE CONTROL KIT
For two, three or four units with chilled water circuits con-
nected in series or parallel, the kit consists of return water
thermostat, lead-lag selector switch for sequence starting,
and time delay relay, with NeMA-1 enclosures, designed
for 115V-1-50/60 Hz.
