Solid State Cooling Systems ThermoCube User manual

Thermoelectric Chiller for Leak-Free Temperature Control
of Aircraft Hydraulic Fluid (PAO)
THERMOCUBE PAO
Product Manual

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 0
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
CE Declaration of Conformity
We: Solid State Cooling Systems
167 Myers Corners Road
Wappingers Falls, NY 12590
USA
declare under our sole responsibility that the
ThermoCube 200, 300, 300A, 400, 400A, 500, PAO (All Models)
meets the provisions of the directives:
Electromagnetic Compatibility (EMC) Directive 2014/30/EU
Low-Voltage (Safety) Directive 2014/35/EU
RoHS Directive 2015/863/EU –R: RoHS Option ONLY
Emissions:
EN 61326-1: 2013 per EN 55011:2009 + A1: 2010 Group 1 Class A
Immunity:
EN 61326-1: 2013 Electrical Equipment for Measurement, Control, and Laboratory Use - EMC
EN 61000-3-2 Harmonics Emissions Class A
EN 61000-3-3 Voltage Fluctuations and Flicker
EN 61000-4-2 Electro-Static Discharge
EN 61000-4-3 Radiated Radio Frequency (RF) Immunity
EN 61000-4-4 Electrical Fast Transient/Burst Immunity
EN 61000-4-5 Surge Immunity
EN 61000-4-6 Conducted RF Disturbance Immunity
EN 61000-4-11 Voltage Dips, Interruptions and Short Variations
EN 61000-6-2 Electromagnetic Compatibility Part 6-2: Immunity for Industrial Environments
Safety:
EN 61010-1: 2010/AMD1:2019 Low Voltage Directive Safety requirements for electrical
Equipment for measurement, control, and laboratory use.
Lloyd F Wright
Chief Technology Officer
Date
August 19, 2020

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 1
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
FCC/ICES/ACMA/UL Declaration of Conformity
We: Solid State Cooling Systems
167 Myers Corners Road
Wappingers Falls, NY 12590
USA
declare under our sole responsibility that the
ThermoCube 200, 300, 300A, 400, 400A, 500, PAO (All Models)
meets the provisions of the directives:
Emissions:
CFR Title 47 FCC Part 15 Subpart B, Class A
ICES-003, Issue 6, Class A
ACMA AS/NZS CISPR 11:2009 + A1:2010 Group 1 Class A
Safety:
UL 61010-1:2012/A1:2018-11 Electrical Equipment for Measurement, Control, and
CAN/CSA C22.2 No. 61010-1:2012/A1:2018 Laboratory Use; Part 1: General Requirements)
Lloyd F Wright
Chief Technology Officer
Date
August 19, 2020

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 2
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
TABLE OF CONTENTS
SAFETY PRECAUTIONS AND SYMBOLS ____________________________________________ 3
SECTION 1 _______________________________________________________________________ 4
INTRODUCTION _______________________________________________________________________ 4
SECTION 2 _______________________________________________________________________ 5
SPECIFICATIONS ______________________________________________________________________ 5
SECTION 3 _______________________________________________________________________ 7
HOOK UP ___________________________________________________________________________ 7
3.1 Electrical Connections____________________________________________________________ 7
3.2 Plumbing Connections____________________________________________________________ 7
3.3 Air Considerations_______________________________________________________________ 7
3.4 Coolant Fill Cap ________________________________________________________________ 7
SECTION 4 _______________________________________________________________________ 9
START UP___________________________________________________________________________ 9
SECTION 5 _______________________________________________________________________ 9
OPERATION__________________________________________________________________________ 9
5.1 Simple Operation_______________________________________________________________ 10
5.2 Advanced Operation ____________________________________________________________ 10
5.3 Alarms _______________________________________________________________________ 13
5.4 Auto-tuning ___________________________________________________________________ 13
5.5 Manual Tuning_________________________________________________________________ 14
5.6 Drain Procedure _______________________________________________________________ 15
SECTION 6 ______________________________________________________________________ 15
SYSTEM ALARMS/TROUBLESHOOTING ____________________________________________________ 15
SECTION 7 ______________________________________________________________________ 17
THERMOCUBE OPTIONS _______________________________________________________________ 17
7.1 ThermoCube PAO Options and Part Number_________________________________________ 17
7.2 RS-232 Communications Option ___________________________________________________18
7.3 Other Options which come Standard with the ThermoCube PAO _________________________ 21
7.3 Other Available Options _________________________________________________________ 22
SECTION 8 ______________________________________________________________________ 23
CLEANING YOUR CHILLER _____________________________________________________________ 23
SECTION 9 ______________________________________________________________________ 23
TECHNICAL SUPPORT _________________________________________________________________ 23
SECTION 10 _____________________________________________________________________ 24
MSDS FOR COOLANTS ________________________________________________________________ 24
WARRANTY _____________________________________________________________________ 31

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 3
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
SAFETY PRECAUTIONS AND SYMBOLS__________________________________
Read the SDS for the coolant used and follow all safety precautions
listed in the SDS prior to removing coolant tubes or opening the fill cap
as this could result in contact with the coolant inside.
Caution! Risk of electric shock. Disconnect the power cord prior to
servicing. This includes changing a fuse or opening the cover for any
reason.
CAUTION
Never disassemble the chiller as irreparable damage may occur.
Any attempt to open or repair the unit will void the warranty
Never store the chiller over 70 °C.
Never operate the chiller in ambient temperatures of 40 ºC or greater unless the unit has been
customized for high ambient operation.
Never operate the chiller within 5 ºC of the coolant’s freezing point.
Always use only proper coolants as specified in manual.
Never ship the chiller with coolant inside the liquid cold plate as freezing temperatures may be
encountered which would damage the unit. Always pump all coolant out of the chiller prior to
shipping.
Symbols Used in this Manual
The red CAUTION equilateral triangle symbol appears throughout the
manual. Please follow the important instructions accompanying this
symbol to avoid significant damage to the chiller.
The red WARNING equilateral triangle symbol appears throughout
the manual accompanying certain maintenance and repair activities.
Please follow the important instructions accompanying this symbol to
avoid situations that could cause injury to the operator or other
personnel.
CAUTION
WARNING

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 4
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
THERMOCUBE PAO
FOR POLY-ALPHA-OLEFIN (PAO) COOLANTS
THERMOELECTRIC CHILLER
SECTION 1
INTRODUCTION____________________________________________________________
The ThermoCube PAO chiller is a thermoelectric temperature control
system with full PID control of both heating and cooling. The wetted
surfaces of this version of the ThermoCube are made from stainless
steel or aluminum with Viton o-rings, making it compatible with all
hydrocarbons based or silicone based coolants such as PAO. It
provides 2 lpm of constant temperature coolant for controlling the
operating temperatures of lasers, military test equipment, or other
industrial applications requiring these coolants. It also has a cycling
feature where two different temperature set points may be entered with
a soak time at each temperature and the number of cycles desired. It
does not use Freon or any other replacement gas. From conception,
this chiller has been designed for long life and ease of use. The internal
thermoelectric modules have lifetimes greater than 200,000 hours.
PRODUCT MANUAL

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 5
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
SECTION 2
SPECIFICATIONS __________________________________________________________
Operating Range (Set Point): 0°C to 65°C standard
Ambient Temperature Range: 0°C to 40°C non-condensing
Stability / Repeatability: ±0.05°C with constant load (even near ambient)
Cooling Capacity (typical1): 275 Watts @ 20°C in 20°C ambient air
Heating Capacity (typical): 400 Watts @ 20°C in 20°C ambient air
Noise Level (at 1 meter): < 63 dBA
Coolant / Process Fluid: Poly-alpha-olefin (PAO), Royco 602, silicone-based fluids
Process Fluid Fittings: 1/4” valved metal CPC (swage fittings also available)
Pumps: 1, 2, or 3 lpm Gear Pump
Tank Volume: 900 ml with level sensor
Wetted Materials: All stainless steel
Dimensions (L x W x H): 13” x 11” x 13” (32cm x 28cm x 32cm)
Weight: 34 lbs (15.4 kg)
Power Input: Universal: 100-240 VAC, 50/60 Hz, 7-5 amps max
Controls: Digital PID controller for heating and cooling
Communications: Keypad or Enhanced RS232 interface (standard)
Alarms Temperature, fluid level, system or component failure
(display and RS232 option)
Standards TUV listed to UL, CAN/CSA and EN 61010-1, CE 61010-1
(RoHS compatibility is available with the "-R" option)
Other Options (see Section 7 for available options)
Warranty 2 years

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 6
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
Figure 1: Cooling Capacity
Figure 2: Pump Curves

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 7
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
SECTION 3
HOOK UP ________________________________________________________________
3.1 ELECTRICAL CONNECTIONS
Power: Plug line cord into 115/230 VAC, +/- 10%, 50/60 Hz,
continuous current draw is rated at 7amps (100 VAC) or 5 amps
(230VAC) at 50/60 Hz.
Fuse: 10 amp (5mm x 20mm) GDB quick acting glass, meets
IEC 127-2
Replacement Fuse: SSCS#20-22332-10, Allied Electronics
#740-9575
Alarms: The ThermoCube has two normally closed 1 amp 250V dry
contact alarm relays instead of the standard TTL alarms, one for
system faults and one for temperature exceeding the alarm range.
These contacts are wired to the 9-pin dsub connector as follows:
System Fault Alarm Common: Pin 6
System Fault Alarm: Pin 1
Temperature Alarm Common: Pin 9
Temperature Alarm: Pin 4
3.2 PLUMBING CONNECTIONS
The process fluid inlet (coolant return) and outlet (coolant supply)
connections, located on the left side, are ¼” Colder Products metal
quick disconnect fittings (female), model number LCD16004V. Note:
Viton o-rings must be specified.
3.3 AIR CONSIDERATIONS The air inlet and outlet are located on the left and right sides
respectively. Restricting airflow into or out of the unit will impair
performance. At least 3 inches of clearance is required on each side to
ensure adequate airflow.
3.4COOLANT FILL CAP The coolant fill cap is located at the top rear of the unit. Twist off the
cap counter-clockwise to open. Fill reservoir prior to starting unit.
Close cap before operating.

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 8
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
Figure 3A
Figure 3B
Figure 3C
Process Fluid Supply
(¼" CPC metal shut off fitting)
On/Off Switch
Signal Connector
9-Pin D-sub
Fill Cap
Display Screen
Controller Input Buttons
Handle
Power Inlet Module
IEC 320 power inlet module with 5X20 fuse
Optional 5-micron particle filter
Fasten the filter-mounting bracket
via the four screws located here

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 9
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
SECTION 4
START UP _______________________________________________________________
Note: In order to avoid injury or damage, operators must only use this product in the
manner specified below.
Start-up the ThermoCube using the following steps:
1) Connect coolant tubing to fluid connections located on the left side
of the unit, labeled Process Out (supply) and Process In (return).
2) Connect Alarm Signal connector (if option chosen).
3) Remove the reservoir cap on top and fill the reservoir to just below
the bottom of its neck with coolant. Replace cap.
4) Plug line cord into 100 - 240 VAC, 50/60 Hz.
5) Turn on switch located on the left side of the unit. The front display
should read the current coolant temperature. If the front display
reads “TANK LEVEL LOW”, add more coolant to the reservoir
until the display changes to read the coolant temperature.
Important Notes:
1) If the tank level low alarm persists, or if another alarm is displayed,
consult section 6.0 of this manual.
2) If using an alcohol/water mixture, do not exceed 25% alcohol or the
reservoir level float may not rise sufficiently when filled to turn off
the tank level low alarm.
SECTION 5
OPERATION ______________________________________________________________
The ThermoCube is operated via the control panel located on the front
panel. The control panel has a 16-character LCD display and four input
keys: UP, DOWN, ENTER, and START. These keys work as follows:
Key
Action
UP
Pressing the UP key raises the parameter value displayed.
DOWN
Pressing the DOWN key lowers the parameter value displayed
ENTER
Pressing the ENTER key momentarily enters the parameter changed.
ENTER
Pressing and holding the ENTER key for 3 seconds causes the chiller to change the
display menu (see menu structure)
START/STOP
Pressing the START/STOP key turns on temperature control.
START/STOP
Pressing the START/STOP key while the chiller is operating turns off temperature
control (Operating Mode = *).
WARNING
Electrical Shock
Hazard: Never Plug
in a Line Cord with
Wet Hands
Running the
ThermoCube dry
(no fluid) may
damage the pump
CAUTION

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 10
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
5.1 SIMPLE OPERATION The ThermoCube comes with preset operating parameters that will
work well for most applications. If temperature control at one
temperature is desired, follow the steps below.
1) Turn on the ThermoCube and wait for display to read TEMP.
2) Press the UP or DOWN keys to change SETTEMP1 to the desired
set point.
3) Press ENTER to accept the value.
4) Press the START/STOP key to begin controlling to the temperature
just entered (SETTEMP1). The Operating Mode will now show “‒
” (cooling) or “+” (heating).
5) Pressing START/STOP while the unit is controlling temperature
will stop temperature control. The Operating Mode will now show
“*” for Standby (not controlling).
Caution: Do not externally shut off the flow of coolant for more than a
ten second period; pump damage will result if run deadheaded for
extended periods of time.
The ThermoCube will now control to the set point temperature. To
change the set point temperatures just press the UP or DOWN keys
again to change SETTEMP 1 to the new set point, followed by ENTER
and then START/STOP. The Operating Mode will now show “‒”
(cooling) or “+” (heating). If the Operating Mode shows “*”, press
START/STOP to begin controlling.
5.2 ADVANCED OPERATION The ThermoCube controller has three menus: the Status Menu, the
Temperature Input Menu and the Parameter Input Menu. The Status
Menu shows the chiller operating status and current temperature of fluid
leaving the chiller (see Figure 3). The Status Menu also allows input of
new coolant temperature setpoints when the cycling feature is off. The
Temperature Input Menu allows input of set point temperatures; soak
times, number of cycles if cycling between two temperatures, and an
alarm temperature. The Parameter Input Menu allows input of the
temperature units; the time units for soak times, the PID parameters and
the auto tune function.
The PID parameters have been preset at the factory for most
applications. If, however, temperature control in not sufficiently
accurate or if overshoot is excessive, the PID parameters may be
modified. Unless the user is well versed in PID theory, we recommend
calling Solid State Cooling Systems technical support group for
assistance.

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 11
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
NOTE: If continuous control at one set-point temperature is desired, set # OF CYCLES to zero.
Menu Structure
Status Menu --------> Temperature Input Menu --------> Parameter Input Menu -------->Status Menu
 
Press up or down SETTEMP 1 TEMPUNIT
key to change  
SETTEMP 1 SETTIME1 TIMEUNIT
Press start to begin MENU STRUCTURE:
UP = Increase Value
DOWN = Decrease Value
Press Enter Momentarily
START/STOP = Alternately Starts or Stops temperature control
Press & Hold Enter Key 3 Sec to move from one menu to another
SIMPLE OPERATION
ADVANCED OPERATION
STATUS MENU
TEMPERATURE INPUT MENU
PARAMETER INPUT MENU
TEMP: XX.X°C (current temp)
SETTEMP1 (set point 1)
TEMPUNIT
PRESS UP OR DOWN
(change set point)


SETTIME1 (time at set point 1)
TIMEUNIT
SETTEMP1 XX.X°C



SETTEMP2 (set point 2)
AUTOTUNE
PRESS START/STOP (to begin
controlling at SETTEMP1)


SETTIME2 (time at set point2)
P1 HEAT
TEMP: XX.X°C (current temp)


PRESS START/STOP (to stop
controlling temperature)
#OF CYCLES (default = 0)
I1 HEAT


ALARM TEMP
D1 HEAT


(return to top of menu)
P2 COOL

I2 COOL

D2 COOL

(return to top of menu)
Press ENTER key once to scroll between menu items ().
Press and hold ENTER key for 3 seconds to move between menus ( ).
Pressing and holding ENTER key while in the Parameter Input Menu will return you to the Status Menu.
If the unit includes the AUTO RESTART option, the unit will begin temperature control when it is first
turned on using whatever Set Point was entered when the unit was powered off.
Note: If the user enters the temperature input or the parameter input menu and does not press a key for 10
seconds the display will revert back to the Status menu.

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 12
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
Status Menu: The status menu displays the chiller operating status and
coolant temperature. The chiller operating mode is shown in the
display’s first character: (See Figure 5)
Figure 5: Operating Display
* = Standby mode, chiller is not controlling temperature
‒ = Cooling mode, chiller is controlling temperature and process
fluid temperature is above the set point
+ = Heating mode, chiller is controlling temperature and process
fluid temperature is below the set point
The process fluid (coolant) outlet temperature is shown after TEMP in
°C or °F.
Pressing the UP or DOWN keys with the # of cycles set to zero
(default) will change the set point temperature upon pressing the
ENTER, then the START/STOP key.
Temperature Input Menu: The temperature input menu allows input of
operating temperatures, soak times, number of cycles desired, and an
optional alarm temperature. Note: If # of cycles is set to zero, only
TEMP 1 and ALARM TEMP will be used.
SETTEMP1 = Set-point of first control temperature.
If # OF CYCLES is set to zero, this is the control temperature.
SETTIME1 = Soak time at temperature 1.
Not used if # OF CYCLES is set to zero.
SETTEMP2= Set-point of second control temperature.
Not used if # OF CYCLES is set to zero.
SETTIME2 = Soak time at temperature 2.
Not used if # OF CYCLES is set to zero.
# OF CYCLES = Number of cycles between temperature 1 and
temperature 2, 0-999 cycles. If set to zero, then the ThermoCube
will continuously control at temperature 1.
ALARMTEMP = Alarm temperature range +/- set-point. The unit will
output an alarm dry contact or TTL signals, but not RS-232.
‒ TEMP 20.0 °C
Temperature Units
Process Fluid Temperature
Operating Mode

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 13
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
Parameter Input Menu: The parameter input menu allows input of
temperature units, time units, PID parameters, and turns on or off auto-
tune.
TEMPUNIT = °C or °F
TIMEUNIT = s: seconds, m: minutes, h: hours
AUTOTUNE = ON/OFF.
ON turns on auto-tune where the controller determines PID
parameters. Once PID parameters have been determined AUTO-
TUNE reads OFF.
P1 HEAT = Proportional band for heating, 0-99.9 °C or °F.
P1 HEAT Factory Default Value = 5.6
I1 HEAT = Integral term for heating, 0-999 seconds
I1 HEAT Factory Default Value = 22
D2 HEAT = Derivative term for heating, 0-999 seconds
D2 HEAT Factory Default Value = 2
P2 COOL = Proportional band for cooling, 0-99.9 °C or °F
P2 COOL Factory Default Value = 2.8
I2 COOL = Integral term for cooling, 0-999 seconds
I2 COOL Factory Default Value = 22
D2 COOL = Derivative term for cooling, 0-999 seconds
D2 COOL Factory Default Value = 2
5.3 ALARMS
The ThermoCube chiller has two TTL level alarms, one for temperature
and one for system failure:
Temperature: TTL high (>4 VDC) fluid temp below alarm set point
TTL low (<0.5 VDC) fluid temp above alarm set point
System: TTL high (>4 VDC) system operating normally
TTL low (<0.5 VDC) system failure has occurred
A list of system failures causing the system alarm to change to TTL low
can be found in Section 6. In the event of a system failure, the alarm
type will be shown on the front display.
5.4 AUTO-TUNING Some ThermoCube models come with an automatic tuning (auto-tune)
feature. Changing the PID parameters is normally not recommended
unless the RTD probe is moved to a new location. However, the
controller can calculate new PID parameters via the auto-tune function.

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 14
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
The following keystrokes initiate the auto-tune function:
1) Press and hold the Enter key until the Status Menu changes to the
Temperature Input menu.
2) Press and hold the Enter key again until the Temperature Input menu
changes to the Parameter Input menu.
3) Press the Enter key three times. The display should read
AUTOTUNE off.
4) Press the Up key to change off to on.
5) Press and hold the Enter key until the parameter input menu
returns to the Status Display.
6) Press the Start key once. The left most display character will show
the letter A until the auto tune is complete. The ThermoCube will
then begin controlling at the set point temperature.
5.5 MANUAL TUNING For users well versed in PID theory, Solid State Cooling Systems
recommends the closed-loop “Ziegler Nichols” method for manually
tuning the controller. The method consists of three steps:
1) Turn off both the integral and derivative terms for heating and
cooling by setting I1, I2, D1, and D2 to zero.
2) Set proportional band to 50 °C. Begin controlling the process at the
desired set-point temperature. Look for a small-sustained oscillation
in the coolant temperature. Observe the status menu operating mode
character and note if system is heating (+) or cooling (-). If no
oscillation occurs, lower the proportional band in 50% increments
until a small oscillation occurs. Write down this proportional band
setting (P)
3) Measure the “Natural Frequency” (t) of the system in seconds. This
is the time required for the temperature oscillation to cycle from one
maximum temperature to the next maximum temperature.
Now set the controller input parameters as follows:
P1 HEAT = 2*P if system was heating in step 2.
P1 HEAT = 4*P if system was cooling in step 2.
I1 HEAT = 1.2*t
D1 HEAT = t/8
P2 COOL = P if system was heating in step 2.
P2 COOL = 2*P if system was cooling in step 2.
I2 COOL = 1.2*t
D2 COOL = t/8

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 15
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
5.6DRAIN PROCEDURE
1. Disconnect the external coolant lines at the quick disconnect
fittings of the Thermocube and external filter (do not touch the
tubing between the filter and Thermocube)
2. Attach a hose with the proper fitting to the “Process Out” port of
the filter and place the end of the hose into a container with at least
a 3 liter capacity.
3. Remove tank cap and turn on the Thermocube (making sure to
hold the drain hose in place) and run the Thermocube until air
starts to shoot out of the hose. Turn off Thermocube.
4. With Thermocube off, attach the drain hose with proper fitting to
the “Process In” port of the Thermocube to allow liquid in the
Thermocube’s lines to drain into container
5. Replace and tighten the tank cap, then remove the drain hose.
6. To remove PAO from the external filter, place a container under
the external filter and carefully unscrew the housing of external
filter. Carefully pour out the PAO into the container
7. Dispose of the coolant in manner consistent with local regulations.
8. Install proper size plugs or caps onto the “Process In” and
“Process Out” fittings unless fittings are quick disconnect fittings
SECTION 6
SYSTEM ALARMS/TROUBLESHOOTING _________________________________________
The ThermoCube has multiple system alarms that when triggered will
show on the display. When an alarm is displayed the system will not
attempt to heat or cool the coolant.
Alarms:
Tank Level Low: Liquid reservoir level is too low. Unless filling for
the first time, check all outside plumbing lines for leaks. Once all leaks
are sealed, remove the cap and add more coolant until the alarm
disappears.
RTD Open: The temperature sensor has failed or its connector has come
loose. Turn off the chiller and disconnect the AC power cord. Contact
SSCS for a replacement RTD, or for a RMA number to return the unit
for RTD replacement.
Fan Fail: Fan is supplying insufficient air to cool the thermoelectric
heat exchanger. Either the fan has failed or the airflow into or out of
the system is blocked. Check that the side air inlet and outlet gratings
are not blocked. The ThermoCube requires at least 3 inches of
clearance around these gratings. If airflow is not blocked, contact
SSCS for a replacement fan, or for a RMA number to return the unit
for fan replacement.
WARNING
Read the Coolant SDS
prior to draining the
chiller
Electrical Shock Hazard:
Always unplug the unit
before removing the
cover.
WARNING
Do not attempt to service or
repair the unit beyond the
troubleshooting checks
described in this section
without first contacting
Solid State Cooling Systems
WARNING

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 16
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
Pump Fail: The liquid heat exchanger plate temperature is either too
hot or too cold, indicating pump failure, a blockage in the external
plumbing lines or operation outside the normal 5°C to 50°C coolant
temperature (without –LT or –HT options). Turn off the ThermoCube
and disconnect the AC power cord. Verify that no kinks or blockages
exist in plumbing line, both outside and inside the ThermoCube. If no
coolant flow blockages exist, contact SSCS for a replacement pump, or
for a RMA number to return the unit for pump replacement.
No Display: If the liquid crystal display does not illuminate upon
turning on the ThermoCube, the internal 12 or 24VDC power supply
has failed, the diaphragm pump has failed, or the LCD display has
failed. Contact SSCS for a RMA number to return the unit for
replacement of the power supply, diaphragm pump, or display.
Temperature Control Poor: If no other alarms are present, poor
temperature control indicates the heat load is too great for the chiller,
the TE cooling/heating engine is not receiving power, the PID constants
have been corrupted or the chiller needs repair. First check the PID
constant values shown section 5.2 match the factory defaults. If not,
change the values to the default values. Otherwise, contact SSCS for
technical support.
Important: The tank level low alarm will automatically reset when
the tank is filled. The RTD, Fan and Pump failure alarms will not
reset until the system power is turned off.

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 17
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
SECTION 7
THERMOCUBE OPTIONS ____________________________________________________
7.1THERMOCUBE PAOOPTIONS AND PART NUMBER
The ThermoCube PAO is configured with many standard options, including: -CPM (metal CPC fittings), -
ES (Enhanced RS232 communications), -EF (External Fluid Filter), -SS (all stainless steel plumbing and
tank), -LT (Low Temperature operation), -HT (High Temperature operation) and -DC (Dry Contact alarms).
Additional available options are shown below:
ThermoCube P/N: 10 –400 –PP –X –FF –YY –OO
Pump Power Fluid Fittings Other
Type Cord Options
PP = Pump Type (choose one):
Price
PP
Description
$0
-1G
>1 lpm @ 35 psig magnetic drive gear
(low vibration, 25,000 hr MTBF) with
stainless steel head
Std
-2G
>2 lpm @ 35 psig magnetic drive gear
(low vibration, 25,000 hr MTBF)
$250
-3G10
>3 lpm @ 30 psig magnetic drive gear
(low vibration, 25,000 hr MTBF)
10 = adjusted flow rate to 1 lpm
$250
-3G20
>3 lpm @ 30 psig magnetic drive gear
(low vibration, 25,000 hr MTBF)
20 = adjusted flow rate to 2 lpm
$250
-3GXX
>3 lpm @ 30 psig magnetic drive gear
(low vibration, 25,000 hr MTBF)
XX = other adjusted flow rate
Note: Extra strength magnets are available for the 3G
pump through a CES. This option is recommended for
any system which might have restricted flow.
(Contact SSCS for more information)
X = Power Cord (select one)
X
Country / Region
Part No.
1
USA/Canada
22-22333-1
2
Europe
22-22332-2
3
Japan
22-22333-3
4
UK
22-22333-4
5
Israel
22-22800-1
6
Australia
22-23213-1
7
Korean
22-23526-1
8
China (3 prong)
22-23661-1
9
NEMA 6-15 208 US Straight
16-23918-1
10
NEMA L6-15 208 US Twist
16-23918-2
FF = Fluid Type:
Price
FF
Description
Std
PA
PAO (Poly-Alpha-Olefin)
Call
FL
Fluorinert
Call
GA
Galden
Call
SI
Silicone
OO = Other Options:
Price
OO
Description
$75
-VD
Vibration dampening material added
$50
-AR
Auto restart –software
$TBD
-YY
Custom engineered special
(sequential number assigned by
Engineering)
YY = Inlet/Outlet Fitting Options:
Price
YY
Description
Std
blank
1/4” CPC metal (CPM)
$50
SW
1/4” Swagelok kit
$70
S2
3/8” Swagelok kit

THERMOCUBE PAO CHILLER PART #52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS,167 MYERS CORNERS ROAD,WAPPINGERS FALLS,NY 12590 18
TELEPHONE:[phone] FAX:[phone] WEB:WWW.SSCOOLING.COM VERSION M9
7.2 ENHANCED RS-232 COMMUNICATIONS (STANDARD)
ThermoCube PAO comes with an Enhanced RS232 communication
port. The chiller uses this port to communicate a comprehensive set of
control parameters with a Host PC - these parameters are outlined
below. This port is a 9-pin female d-sub connector and is found on the
rear panel of the chiller (see Figure 3C and 3D).
-ES: Enhanced RS-232 Communications (Standard, not shown in part number)
Wiring: Proper wiring depends upon whether the equipment being cooled (the Host) is wired as Data
Computer Equipment (DCE) or Data Terminal Equipment (DTE)
Table 1A: Signal definition and wiring for Host wired as DTE
Computer/Host/Master
Male 9-Pin D-sub Pin #
Chiller / Slave
Female 9-Pin D-sub Pin#
2 (Receive –RXD)
2 (Transmit –TXD)
3 (Transmit –TXD)
3 (Receive –RXD)
5 (Ground)
5 (Ground)
Note: Use a null modem cable if your RS-232 is set up as a DCE.
Communication Specification
Speed: 9600 baud
Data Flow Control: None
Data Format: 8-bit serial
Number of Stop bits: 1
Parity: None
Transmission Breakdown: One command byte followed by zero, one, or two data bytes depending on
data type.
Master/Slave: ThermoCube is always the SLAVE (DTE)
Interrupts Reported: None, must be polled for status
Transmission Length: < 15 meters
Data Update Frequency: Once per second
Maximum Polling Frequency: Three commands per second
Female DB9