CSZ ZP 16, Installation, Operation & Maintenance Manual, Page: 15 / 88

SAFETY - PRECAUTIONS AND FEATURES
Page 1-5
SAFETY FEATURES
Cincinnati Sub-Zero incorporates many safety features in the design of its
equipment. These safety features provide protection for the equipment, as well as
for operating and maintenance personnel.
SEE WARNING
ELECTRICAL CIRCUIT PROTECTION
1. All power circuits and control circuits are separately protected by circuit
breakers or fuses.
2. Compressors have internal inherent electrical overload protection which will
shut down the compressor in the event of an electrical or thermal overload.
3. All power to the chamber heaters pass through a non-cycling power contactor.
This contactor is controlled by the chamber over temperature limit and an
optional High/Low test limit control and is de-energized if either a chamber is
over-temperature or a test item over/under-temperature condition exists.
REFRIGERATION SYSTEM PROTECTION
1. The refrigeration systems utilize refrigerants which are non- fl ammable and non-
explosive.
2. The refrigeration system is equipped with pressure controls. These controls will
shut down the compressor if a high or low pressure condition is reached. Refer
to the Refrigeration Flow Diagram and the Electrical Schematic for the speci
fi c
pressure controls on your unit. Contact Cincinnati Sub Zero with any questions.
OVER-TEMPERATURE PROTECTION
The high temperature cutoff is installed to protect the chamber from exceeding
design limits. This safety device removes power only from the chamber heaters
when an over-temperature condition exists in the chamber. They DO NOT remove
power from the product being tested.
PRODUCT HIGH LIMIT (IF EQUIPPED)
The product high temperature limit can be used to protect the product being tested
and the chamber from overheating. The thermocouple hanging from the back of the
chamber can be attached to the customer product. The product safety should be
checked for proper operation every three (3) months.
CHAMBER HIGH LIMIT
This device is intended for chamber over temperature protection only. It is preset to
open at the temperature indicated on the electrical schematic .
Do not bypass any of the
safety features provided
in this equipment. Failure
to follow these instructions
could result in serious
personal injury.
WARNING
!
The chamber high limit and
other latching thermostats
and thermal cut outs can
only be reset by properly
trained service personnel.
Only access the chamber
sub panel or remove any
side rear service panels if
you are a quali
fi ed service
personel.
WARNING !
C i n c i n n a t i S u b - Z e r o
chambers are equipped
with high heat limits, or
safety devices. These
safety devices are installed
to protect the chamber
from exceeding design
limits. These safety devices
remove power ONLY from
the chamber heaters and
DO NOT remove power from
your product. Provisions
must be made to de-energize
the product under test and
the chamber in the event
of an over-temperature
condition.
WARNING
!
DO NOT touch refrigeration
lines while the unit is in
operation. Lines can become
extremely hot or very cold and
can cause severe burns.
WARNING
!