CSZ MicroClimate Series Instruction manual

Installation
Operation
Maintenance
Manual
MicroClimate®
Series
56291 REV AE
4/2020
MCB-1.2
MC-3
MC
3
MCB 1 2

INTRODUCTION
Note: CSZ is continuously upgrading the components used
in its equipment. Consequently, the physical appearance of
certain components may vary from that shown.

INTRODUCTION
INTRODUCTION
This manual has been tailored to match the specific features and options provided on
your Temperature Chamber at the time of original manufacture. The last section of the
manual is the specific information section. This area was developed in an attempt to
better define items on CSZ chambers that are “SPECIFIC” to a customer. Please refer
to this section for warranty, controller PID parameters, and calibration/verification test
data sheets.
Cincinnati Sub-Zero Temperature Chamber:
MODEL NO.
SERIAL NO.
DO NOT USE THIS MANUAL IN AN ATTEMPT TO OPERATE OR MAINTAIN ANY
OTHER MODEL OR SERIAL NUMBER.
PLEASE READ THIS ENTIRE MANUAL BEFORE OPERATING THIS UNIT.

INTRODUCTION
THIS PAGE INTENTIONALLY LEFT BLANK

CHAMBER LABELS & MEANINGS
CHAMBER LABELS
AND MEANINGS
Some graphical safety labels may
be replaced with textual based
safety labels. Read the entire
manual for other safety information
that is applicable to our chamber.
GENERAL DANGER, CONSULT MANUAL
ELECTRICAL SHOCK
EXPLOSION, ARC FLASH HAZARD
LOW TEMPERATURE
HOT SURFACE
KEEP HANDS CLEAR; PINCH HAZARD
CONSULT OPERATORS MANUAL
BEFORE OPERATING
WEAR EYE PROTECTION
TURN OFF AND LOCK OUT SYSTEM
POWER BEFORE SERVICING
WEAR PROTECTIVE GLOVES
FORKLIFT RIGHT, DESIGNATES
CHAMBER LIFTING POINTS
FORKLIFT LEFT, DESIGNATES
CHAMBER LIFTING POINTS
DO NOT OPERATE WITH PACEMAKER
PROTECTIVE CONDUCTOR TERMINAL

CHAMBER LABELS & MEANINGS
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TABLE OF CONTENTS
SYSTEM DESCRIPTION ..............................................................................................................2-1
CONTROLLER ..............................................................................................................................2-1
CHAMBER .....................................................................................................................................2-1
CHAMBER INTERIOR...................................................................................................................2-1
CHAMBER EXTERIOR..................................................................................................................2-1
REFRIGERATION/HEATING .........................................................................................................2-2
REFRIGERATION ..........................................................................................................................2-2
HEATER .........................................................................................................................................2-2
HUMIDITY (OPTIONAL) ................................................................................................................2-2
PEN RECORDERS (OPTIONAL) ..................................................................................................2-7
HIGH/LOW LIMIT CONTROL .......................................................................................................2-7
IEEE-488 SYSTEM (OPTIONAL) ..................................................................................................2-8
LN2/CO2 BOOST COOLING SYSTEM (OPTIONAL)...................................................................2-8
HUMIDITY PANEL/CHAMBER COMPONENTS (OPTIONAL) .....................................................2-9
MICROCLIMATE SPECIFICATIONS...........................................................................................2-13
SEQUENCE OF OPERATIONS...................................................................................................2-24
FIGURES AND TABLES
MCB(H)-1.2
Figure 1. Humidity Performance Chart.......................................................................................................2-3
Figure 2. Plenum Area..................................................................................................................................2-4
Figure 3. Air Temperature Sensor Location (MCB 1.2) .............................................................................2-4
Figure 4. Air Temperature Sensor Location (MCBH 1.2)...........................................................................2-6
MC(H)-3
Figure 5. Plenum Area..................................................................................................................................2-7
Figure 6. Air Temperature Sensor Location ...............................................................................................2-7
Figure 7. Air Temperature Sensor Location (MCH-3) ................................................................................2-6
Figure 8. MCB 1.2 Recirculating Water.....................................................................................................2-11
Figure 9. MC3 Recirculating Water ...........................................................................................................2-11
Figure 10. Steam Generator System.........................................................................................................2-12
INTRODUCTION............................................................................................................................1-1
GENERAL SAFETY PRECAUTIONS ...........................................................................................1-1
HANDLING ELECTROSTATIC DISCHARGE SENSITIVE DEVICES...........................................1-4
SAFETY FEATURES .....................................................................................................................1-5
ELECTRICAL CIRCUIT PROTECTION.........................................................................................1-5
REFRIGERATION SYSTEM PROTECTION..................................................................................1-5
OVERTEMPERATURE PROTECTION..........................................................................................1-5
CHAPTER 1
SAFETY PRECAUTIONS/FEATURES
CHAPTER 2
GENERAL DESCRIPTION
SECTION 1
USER MANUAL

TABLE OF CONTENTS
PREPARATION FOR USE.............................................................................................................4-1
LIFTING INSTRUCTIONS..............................................................................................................4-1
MAIN POWER CONNECTION.......................................................................................................4-1
SINGLE PHASE CORD CONNECTED EQUIPMENT...................................................................4-2
THREE PHASE POWER CONNECTION ......................................................................................4-2
REMOVING TOP COVER OF CHAMBER ....................................................................................4-3
HUMIDITY SYSTEM (IF EQUIPPED) ............................................................................................4-3
FIGURES AND TABLES
Figure 1. Power Distribution Block.............................................................................................................4-2
Figure 2. Top Cover Removal ......................................................................................................................4-3
Figure 3. Refrigeration Power Pack (MCB 1.2 Cascade)...........................................................................4-4
Figure 4. Main Power Wiring (MCB)............................................................................................................4-5
Figure 5. Main Power Wiring (MCBH) .........................................................................................................4-6
Figure 6. Main Power Wiring (MC-3) ...........................................................................................................4-7
Figure 7. Main Power Wiring (MC-3 with EZT-570S Controller)................................................................4-8
Figure 8. Refrigeration Power Pack (MC-3)................................................................................................4-9
Table 1. Power Requirements......................................................................................................................4-2
START-UP INSTRUCTION SUMMARY.........................................................................................3-1
SUMMARY FOR STEP-BY-STEP SETPOINT OPERATION - EZT-430S ....................................3-1
CHAMBER PERFORMANCE (EZT-430S) ....................................................................................3-6
HIGH/ LOW LIMIT CONTROL ......................................................................................................3-6
START-UP INSTRUCTION SUMMARY - F4 (OPTIONAL) ...........................................................3-7
SINGLE SET-POINT OPERATION - HUMIDITY ...........................................................................3-9
CHAMBER PERFORMANCE (WATLOW F4) ...............................................................................3-9
START-UP INSTRUCTION SUMMARY - EZT-570S (OPTIONAL) .............................................3-10
PUMPDOWN................................................................................................................................ 3-11
SINGLE SETPOINT OPERATION ...............................................................................................3-12
MANUAL EVENT CONTROL ......................................................................................................3-13
PROFILE OPERATION................................................................................................................3-13
FIGURES AND TABLES
Figure 1. EZT-430S Controller .....................................................................................................................3-1
Figure 2. Watlow F4 Controller....................................................................................................................3-8
Figure 3. EZT-570S Controller ...................................................................................................................3-10
SECTION 2
INSTALLATION AND MAINTENANCE MANUAL
CHAPTER 3
OPERATING INSTRUCTIONS
CHAPTER 4
INSTALLATION

TABLE OF CONTENTS
INSPECTION SCHEDULE.............................................................................................................5-1
PREVENTIVE MAINTENANCE SCHEDULE ................................................................................5-1
DAILY .............................................................................................................................................5-1
MONTHLY ......................................................................................................................................5-1
YEARLY .........................................................................................................................................5-2
GENERAL VISUAL INSPECTION ................................................................................................5-3
TEST EQUIPMENT REQUIRED FOR MAINTENANCE................................................................5-3
SATURATED PRESSURE CHART PSIG......................................................................................5-7
SATURATED PRESSURE CHART BAR G...................................................................................5-8
HUMIDITY SYSTEM MAINTENANCE...........................................................................................5-9
CHANGING THE CARTRIDGE .....................................................................................................5-9
CLEANING THE HUMIDITY SENSOR........................................................................................5-10
WATER QUALITY ........................................................................................................................ 5-10
FIGURES AND TABLES
Table 1. Required Test Equipment ..............................................................................................................5-3
Table 2. General Troubleshooting Procedures ..........................................................................................5-4
Table 3. Humidity Troubleshooting Procedures ........................................................................................5-6
CHAPTER 6
WARRANTY AND SHIPPING INFORMATION
CHAPTER 5
MAINTENANCE INSTRUCTIONS
HOW TO CONTACT CSZ ..............................................................................................................6-1
HOW TO OBTAIN REPLACEMENT PARTS/PARTS ORDERING PROCEDURE........................6-1
STANDARD LIMITED EQUIPMENT WARRANTY

TABLE OF CONTENTS
CALIBRATION CERTIFICATES
ADDITIONAL UNIT SPECIFIC DOCUMENTATION AS REQUIRED
ELECTRICAL BILL OF MATERIALS
REFRIGERATION BILL OF MATERIALS
OPTIONS BILLS OF MATERIALS AS REQUIRED
ELECTRICAL SCHEMATIC SYMBOLS
REFRIGERATION SCHEMATIC SYMBOLS
LAYOUT DRAWING (IF REQUIRED)
ELECTRICAL SCHEMATIC
REFRIGERATION FLOW DIAGRAM
OPTIONS DRAWINGS, DIAGRAMS AND SCHEMATICS AS REQUIRED
SECTION 3
CHAMBER SPECIFIC DOCUMENTATION
CHAPTER 7
SPECIFIC INFORMATION
CHAPTER 8
PARTS LISTS
CHAPTER 9
SYSTEMS DIAGRAMS

SAFETY - PRECAUTIONS AND FEATURES Page 1-1
NOTE
INTRODUCTION
Warnings contained in this manual are identi•ed by this symbol. Warnings identify any
conditions or practices that, if not strictly observed, could result in personal injury or
possible loss of life.
Cautions in this manual are identi•ed by this symbol. Cautions identify any condition
or practice that, if not strictly observed, could result in damage to, or destruction of, the
system equipment. Please read all precautions before operating your unit.
Notes contained in this manual are identi•ed by this symbol. Notes identify items of
importance to proper operation and maintenance.
This instrument has been designed and tested in accordance with IEC Publication
61010-1:2010. Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use and has been supplied in a safe condition. The instruction
documentation contains information and warnings which must be followed by the user
to ensure safe operation and to maintain the instrument in a safe condition.
GENERAL SAFETY PRECAUTIONS
The following are general safety precautions that are not related to any speci•c
procedures and therefore do not appear elsewhere in this manual. These are
recommended precautions that must be understood and applied during many phases
of operation and maintenance of the equipment.
IMPORTANT: All OSHA and other applicable local and national codes, regulations,
and guidelines regarding lockout/tagout procedures must be followed. This includes a
lockable disconnect switch.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel should at all times observe all safety precautions. Do not replace
components or make adjustments inside the equipment with the high voltage supply
turned on. Under certain conditions, dangerous potentials may still exist when the
power switch is in the off position due to charges retained by capacitors. To avoid
injury, always remove power and discharge and ground a circuit before touching it.
NOTE: Keep unit away from !ammable substances.
DO NOT SERVICE OR ADJUST ALONE
No one should reach into an enclosure to service or adjust equipment except in the
presence of someone who is capable of rendering aid.
RESUSCITATION
Personnel working with or near high voltages should be familiar with modern methods
of resuscitation. Such information may be obtained from the Local Red Cross Agency.
For CE
Marked
Chambers
Only
CAUTION
!
WARNING
!

SAFETY - PRECAUTIONS AND FEATURES
Page 1-2
GENERAL SAFETY PRECAUTIONS
DO NOT replace components or make adjustments inside the equipment with the main
power supply turned on. Under certain conditions, dangerous potentials may still exist
when the power switch is in the off position due to charges retained by capacitors. To
avoid injury, always remove power and ground a circuit before touching it.
Paint thinners, cleaning solutions and other chemicals or solvents should never be
stored in the vicinity of the unit. High operating temperatures and live electrical circuits
could ignite fumes and cause an explosion.
DO NOT touch refrigeration piping during chamber operation. The refrigeration piping
can become very hot or extremely cold, and cause severe burns.
High voltage remains present during an alarm. This unit must be locked out at the main
power source prior to servicing. The enclosure cover should also remain installed at all
times.
Lock-out main power prior to servicing. High voltage remains present on main electrical
panel with covers removed.
The chamber door must remain closed during operation. If the door is required to be
open, wear safety goggles to prevent the high velocity air!ow from blowing particles or
objects into your eyes.
This chamber operates at extreme temperatures. Avoid any personal contact with
objects and surfaces that may be hot or cold to prevent severe burns or frostbite.
The refrigeration unit is a pressurized system and hazards exist which could result in
personal injury. Removal and installation of the hermetic compressor be performed by
experienced personnel only. Failure to follow these instructions may result in serious
personal injury.
Gaseous nitrogen/C02 vent connection must be ducted to the outdoors to prevent
displacement of oxygen around the unit.
DO NOT place items in the chamber that could burn or explode at high temperatures.
This chamber uses open wire heating elements which generate surface temperatures
over 1000ºF/538°C. This is NOT an explosion-proof chamber.
PRODUCT PROTECTION. 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 on test and the chamber in the event of an over-temperature protection.
All OSHA and other applicable local and national codes, regulations, and guidelines
regarding lockout/tagout procedures must be followed while servicing this unit. This
may include a lockable disconnect switch to remove power from the equipment while
servicing.
DO NOT reach into an enclosure to service or adjust equipment except in the presence
of someone who is capable of rendering aid.
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
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WARNING
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CAUTION
!

SAFETY - PRECAUTIONS AND FEATURES Page 1-3
Window frame may become hot during operation.
DO NOT put corrosive substances into the chamber examples of corrosive substances
include, but are not limited to, Chlorine, Chlorides and Acids.
DO NOT place items in the chamber which can emit corrosive vapors or substances.
There are NO provisions for venting fumes.
To prevent damage to your test samples and the chamber's compressors, DO NOT
exceed the live load rating of the chamber. (See the General Description Section of this
manual for the Live Load rating for your unit.)
Running Temperature/Humidity points outside of the standard range can cause damage
to the refrigeration compressor(s).
High Voltage remains present when the chamber standby/on switch (if equipped) is
in the standby position. The standby position does not remove power from the main
electric panel.
Do not place any objects on top of the chamber. Don't climb on top of chamber.
All loads must be removed from chamber prior to transport and/or maintenance and
servicing. Do not attempt to move the chamber with the chamber door open.
Only qualified maintenance personnel should be permitted to perform any
maintenance and installation procedures.
To prevent hazards to operators and other personal, read the installation manual in
its entirety. If there are any questions regarding the information in the manual, please
contact Cincinnati Sub-Zero.
Do NOT position chamber so that it is difficult to operate disconnect device.
If the equipment is use in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
DO NOT remove lid without referencing Installation section for proper procedure.
The safety of any system incorporating the equipment is the responsibility of the
assembler of the system.
GENERAL SAFETY PRECAUTIONS
CAUTION
!
CAUTION
!
CAUTION
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
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SAFETY - PRECAUTIONS AND FEATURES
Page 1-4
ELECTROSTATIC DISCHARGE SENSITIVE DEVICES
This manual contains maintenance procedures for parts and assemblies sensitive
to damage by electrostatic discharge (ESD). Parts or assemblies are identi•ed as
ESD sensitive by the symbol to the left.
The following are general precautions that should be observed when handling ESD
sensitive devices or assemblies:
1. Handling ESD sensitive devices at approved •eld force protective work
stations.
2. Keep work area free of static generators, such as plastic cups, foam cushions,
and rayon or polyester apparel.
3. Avoid static-producing activities, such as wiping feet and removing or putting
on smocks while in the work area.
4. Use ESD protective equipment, such as grounded work benches, grounded
tools and test equipment, conductive •ooring, air ionizers, personnel ground
straps with 1 megohm minimum resistance, and protective apparel whenever
possible.
5. Store and transport ESD sensitive devices in protective bags, tote boxes, or
trays. Use original packaging whenever possible.
6. Remove power and signals before removing or installing ESD sensitive
devices or assemblies.
7. Handle ESD sensitive circuit card assemblies by their shunt bars or edges.
Do not touch parts, terminals, or circuitry. Do not use canned coolant for fault
isolation.
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
!

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.
ELECTRICAL CIRCUIT PROTECTION
1. The MCB-1.2 model (115VAC,60 Hz) requires a dedicated 20 amps circuit. The
MCB 1.2 model (230VAC,50 Hz) requires a dedicated 16 amps circuit. The
building/facility circuit breaker will provide short circuit protection between mains
conductor and protective earth. See the electrical schematic for information on
the other models.
2. Compressors have internal thermal overload protection which will shut down the
compressor in the event of a thermal overload.
REFRIGERATION SYSTEM PROTECTION
1. The refrigeration systems utilize refrigerants which are non-!ammable and non-
explosive.
OVER-TEMPERATURE PROTECTION
High temperature limit controllers, thermal cut-outs, and thermostats are installed to
protect the chamber from exceeding design limits. The safety devices remove 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.
1. High temperature limit controller (9-Inst) (MCB(H) Models) (MC(H)-3 models)
Chamber over-temperature protection only. It is preset to open at the
temperature indicated on the electrical schematic (typically 200ºC-240°C). Once
the temperature in the chamber drops below the Hi limit setting, cycle power to
the chamber to reset the limit controller.
2. Product High/Low Limit (Optional)
The chamber may be equipped with a Product High/Low Limit Alarm
that incorporates an independent type “T” thermocouple to monitor part
temperature. The high/low limit alarm shuts down the chamber and sounds an
audible alarm if the preset temperature limits are exceeded. The alarm can be
used by the customer to shut down the product under test (SEE ELECTRICAL
SCHEMATIC for proper connection). The limit alarm is both high and low, can
be set for latching or non-latching, and has an adjustable hysteresis band.
DO NOT CONNECT
THIS UNIT TO A GFI
CIRCUIT BREAKER.
WARNING
!

SAFETY - PRECAUTIONS AND FEATURES
Page 1-6
THIS PAGE INTENTIONALLY LEFT BLANK

GENERAL DESCRIPTION Page 2-1
SYSTEM DESCRIPTION
MC-Series Temperature chambers are pre-engineered chambers designed to provide an
environment with speci!c temperature (humidity) conditions. The standard MC-model is
composed of three basic sections: 1. Control section, 2. Chamber section, 3. Refrigeration/
Heating section. Optional equipment includes, but is not limited to: 4. Pen Recorders, 5.
High/Low Limit.
The MCB-1.2 and MC-3 (230V and 400V) chambers have a standard temperature range
of -94ºF to +375ºF (-70ºC to +190ºC). The MC-3 (115V) has a standard temperature
range of -85°F to +375°F (-65°C to +190°C). 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
speci!cations at the end of this section for additional information. The single stage model
has a temperature range of -22ºF to +375ºF (-30ºC to +190ºC).
CONTROLLER
The standard controller on MC Series chambers is EZT-430S. Operating instructions
for the EZT-430S are found in the EZT-430S User’s Manual on the digital media that
accompanied this chamber. The Watlow F4 controller is an option. The EZT-570S is an
option on the MC-3 only. The User Manuals for both the standard and optional controllers
are found on the digital media that accompanied the chamber.
CHAMBER
Chamber Interior
MCB-1.2 (115V and 230V)
The chamber interior consists of the workspace and the top component area,
separated by a stainless steel plenum. A probe bracket is attached to the upper
right corner of the grill on the plenum cover. The bracket contains the probes for
the controller and recorder (if required). The top area behind the plenum contains
the refrigeration evaporator, heater, and evaporator fan. Refer to Figures 1, 2, and
3.
MC-3 (115V, 230V and 400V)
The chamber interior consists of the workspace and the back plenum area
separated by a stainless steel panel. A probe bracket is attached to the upper left
corner of the grill on the plenum cover. The bracket contains the probes for the
controller and recorder (if required). The back plenum contains the refrigeration
evaporator, heater, and evaporator fan. Refer to Figures 4, 5, and 6.
Chamber Exterior
Fiberglass insulation is used with a high temperature binder for temperatures up
to 500ºF (260ºC). The cabinet is constructed with minimal mechanical contact
between the liner and the exterior to reduce conductive heat losses and minimize
condensation on the exterior cabinet.
An optional multiple-pane window assembly in the door of the chamber allows
viewing of the chamber interior during operation. The window is constructed
of tempered glass panes to assure frost-free viewing during low temperature
chamber operation. Under certain ambient conditions, it may be normal to see
some condensation around the outer window frame area during low temperature
operation.
Condensation on exterior
surfa c es is norma l
when operating at cold
temperatures for an
extended period of time.
NOTE
!

GENERAL DESCRIPTION
Page 2-2
REFRIGERATION/HEATING COMPONENTS
A. Refrigeration
MC-Series chambers have a cascade mechanical refrigeration system. The cascade system for a
MCB-1.2 and the MC-3 (230V and 400V) have an ultimate low temperature of -94ºF (-70ºC) and
the MC-3 (115V) has an ultimate low temperature of -85°F (-65°C). The MCB single stage has a
temperature range of -22°F (-30ºC) to +375°F (+190ºC). There are some options that will affect
ultimate low temperature. The cascade system uses refrigerant R-404A in System #1 and R-508B
in System #2. The refrigeration system is air cooled. The ambient around the unit should not exceed
80ºF (26.7ºC) for proper operation. Ultimate low temperatures will vary with ambient conditions.
All refrigeration components are selected to ensure safe, reliable, and balanced operation. The
components may be purchased from the CSZ Service Department or a local refrigeration wholesaler.
B. Heater
Open-coil nichrome heating elements are standard on all systems. The heaters are mounted in
porcelain insulators attached to stainless steel frames. The heaters are located in the plenum area
and do not radiate directly into the test space.
HUMIDITY (OPTIONAL)
The MCBH-1.2 and the MCH-3 Series chambers provide the same temperature ranges for heating and
cooling as the MCB-1.2 and the MC-3 Series, but add the ability to control humidity within the range of 10% to
95% relative humidity as limited by a +185°F (+85°C) dry bulb temperature and a +45°F (+7°C) dewpoint. The
MCBH-1.2 and the MCH-3 both use a steam generator.
***In some instances and at certain setpoints, the PID parameters in the controller can be changed to achieve
better control in humidity mode. Please see Chapter 4 and the controller manual for instructions on
how to edit PID’s.

GENERAL DESCRIPTION Page 2-3
Figure 1. Humidity Performance Chart

GENERAL DESCRIPTION
Page 2-4
Evaporator Coil Heater Air Circulator Fans
Figure 2. MCB-1.2 Plenum Area
MCB-1.2
Air Temperature Sensor
Figure 3. MCB-1.2 Air Temperature Sensor Location
Note: CSZ is continuously upgrading the components used
in its equipment. Consequently, the physical appearance of
certain components may vary from that shown.