Cincinnati Sub-Zero ZP Series, Installation, Operation & Maintenance Manual

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GENERAL DESCRIPTION
7
CHAPTER 2:
GENERAL DESCRIPTION
SYSTEM DESCRIPTION
The ZP-Series Temperature chambers are pre-engineered chambers designed to
provide an environment with specific temperature (humidity) conditions. The
standard ZP model is composed of the following: 1. Controller, 2. Chamber, 3.
Refrigeration/ Heating components. Optional equipment includes, but is not
limited to: 4. Humidity, 5. Pen Recorders, 6. High/Low Limit, 7. IEEE-488 Serial
Interface, 8. Boost Cooling System, 9. GN2 Purge, 10. Dry Air Purge, 11. Limited
Temperature Sheath Heaters.
The chambers have a standard range of -94°F to +375°F (-70°C to +190°C)
cascade, -50°F to +375°F (-45°C to +190°C) Tundra, and -30°F to +375°F (-34°C
to +190°C) single stage which provide both heating and cooling as required.
Chambers with optional humidity are designed to provide a minimum of 10%
and a maximum of 98% relative humidity, as limited by a 45°F (7°C) dewpoint
and a 185°F (85°C) maximum dry bulb temperature. Refer to Figure 2 for
Achievable Humidity Points. The chambers are designed to operate in a
commercial environment, i.e. temperature of +75°F +/- 10°F (+23°C +/- 6°C),
maximum dew point of 55°F (12.8°C), and an altitude of 7,000 ft. (2133.6M).
Refer to the specifications at the end of this section for additional information.
CONTROLLER
The standard controller is composed of a CSZ EZT-570S Controller, a High/Low
limit, and communications electronics. Detailed operating instructions for the
controller are found in the controller user’s manuals on the digital media that
accompanied the chamber. Other optional controllers available include the
Watlow F4. See Operating Instructions in Chapter 4 for more information
regarding chamber controllers.
CHAMBER
A. Chamber Interior
The chamber interior consists of the front workspace and the rear component
area, separated by a stainless-steel plenum cover. A probe bracket is behind
the grille in the upper left corner of the plenum. The bracket contains the
probes for the controller, recorder (if required), and RH sensor (if humidity
option is installed). The area behind the plenum cover contains the
refrigeration evaporator coil, heater limit thermocouple, evaporator fan(s),
humidification inlet (if humidity option is installed), auxiliary cooling nozzle (if
auxiliary cooling option is installed), and the dehumidification coil (if humidity
option is installed). These items may only be accessed by removal of the plenum
cover by properly trained service personnel.
B. Chamber Exterior
Fiberglass insulation is used with a high temperature binder for temperatures
up to 500°F (260°C). The cabinet is constructed with a minimum of mechanical
contact between the liner and the exterior to reduce conductive heat losses and
minimize condensation on the exterior cabinet.
Condensation on exterior
surfaces is normal when
operating at cold
temperatures for an
extended period of time.
NOTE