Frigor Tstat Series User manual

Tstat Series
- 1 -
Descriptions
Tstat6
This full-featured CPU based thermostat is designed for small cooling and heating air handling sys-
tems in residential and commercial facilities. The unit provides features which eclipse standard me-
chanical thermostats at a price that fits conventional HVAC projects.
Highlights:
-Tight control of 0.5°C provides comfortable indoor environment.
-High impact plastic enclosure provides durability in commercial environments.
-Customizable sequence of operation table (FCU with modulating or on/off valve,single or 3-speed fan,
pressure independent VAV, stage sequencer)
-Available in Clock, Clock & Humidity, CO2 ,OCC and Zigbee options
Sales Price Discount Price OEM>50k/yr
Tstat6 39 37 36
Tstat6-CH 44 42 41
TSTAT6-CO2 90 75 60
TSTAT6-ZIGB 55 53 51
TSTAT6-OCC 41 39 38

Tstat Series
- 2 -
Tstat6 Technical Data
Tstat6-CO2 Technical Data
- Tstat6 with C02 sensor now available. All the powerful features of Tstat6 zone controller
plus a C02 sensor in one compact package.
- Can be used as a stand alone zone controller for ‘demand based’ total solution.
- Or use the analog outputs as a regular C02 transmitter as inputs to a central controller.
- Modbus RS485 network connection for easy integration with automation systems.
- Tight control of 0.5°C provides comfortable indoor environment.
- High impact plastic enclosure provides durability in commercial environments.
- Customizable sequence of operation table (FCU with modulating or on/off valve, single
or 3-speed fan, pressure independent VAV, stage sequencer…)
- An affordable CO2 sensing solution for HVAC/DCV
CO2 Performance:
Measurement Range..................................................................0-3,000 ppm display
(2000ppm, 5000ppm, 10,000ppm are optional)
Accuracy....................................................................................±70 ppm or ±5% of reading
Repeatability..............................................................................±20 ppm
Temperature Dependence ........................................................Typ.±0.2% of reading per °C or ±2 ppm per
°C, whichever is greater, referenced to 25°C
- 2.4-GHz IEEE 802.15.4 Compliant RF Transducer
- Programmable Output Power Up to 4.5dBm
Tstat6-Zigbee Technical Data
TSTAT6 5 relays x 2amps @24V, 7 analog inputs,
2 analog outputs (10V @100ma)
Operating temperature -30-70°C(-22~158°F)
Supply voltage 12~24VAC/DC ±20%, 50-60Hz
Power consumption 100mA at 12VDC
Relay contacts rating 2A @ 24VDC, 0.5A @ 125VAC
UL File No.: E43149
CSA File No.: LR26550
Ambient humidity 10-90 %Rh
Operating Environment 0 ~ 99% humidity non condensing
Plastic Housing Flammability rating UL 94V0 file E194560
Enclosure rating IP31
Temperature sensor 10K thermistor ±0.5°C
Colour White/Off-white
Weight 200g

Tstat Series
- 3 -
A genuine Tstat6 with Clock or Humidity options, they added some new features.
1. Temperature range: indoor & outdoor -30 °C ~ + 70 °C ( -22 ~ +158 °F )
Humidity range : indoor 10% ~ 90%RH
Power - supply : 100mA at 12VDC
2. Functions :
Indoor & outdoor temperature display , indoor humidity display.
Temperature unit °C /°F changeable.
Clock & date display function , automatic exchanging in 5 seconds between clock & date
Pointing function each hour.
Display the current temperature , humidity , time, and automatic exchanging working according
to the schedule.
Calender display function.
Week display function.
Clock ,date , lunar calendar, Gregorian calendar automatic exchanging function (only for typical
models).
3. Attention :
*Press button for one time when the meter is first used or the battery is replaced .
*Press button for one time if any abnormal display appears .
Tstat6-C or Tstat-CH Technical Data
Tstat6-OCC Technical Data
Tstat6-OCC is an energy conservation device designed to detect the presence of human occu-
pants in a given area.
Many commercial, industrial and government facilities require a significant number of lighting fix-
tures for adequate illumination, and therefore use a significant amount of power to operate the lighting
fixtures. A number of facilities use lighting control systems to control when the lighting fixtures are en-
ergized and thereby reduce the amount of power that is consumed to light these facilities.
Tstat6-OCC can be provided with an ambient light sensor and control input therefore. The ambi-
ent light sensor and control input can be used to select a minimum level of light above which a lighting
fixture is prevented from being switched and powered on following detected motion.
Tstat6-OCC typically sense the presence of one or more persons within a designated area and
generate occupancy signals indicative of that presence. These signals activate or deactivate one or
more electrical appliances, such as, for example, a lighting unit or a heating, ventilating, and air con-
ditioning system. When occupancy is sensed, the various electrically-powered loads in that area con-
trolled by the sensor are energized. When that same area has been unoccupied for a predetermined
period of time, the sensor de-energizes the electrical loads that it controls. Thus, the lighting control
system operates in a daylight inhibit mode when the ambient light level is sufficient to render the switch-
ing of the lamp unnecessary. The two most prevalent types of occupancy sensors are passive infrared
and active ultrasonic devices. A passive infrared (PIR) sensor will turn on the load whenever it detects
a moving or newly apparent heat source. we only have passive infrared (PIR) sensor.

Tstat Series
- 4 -
Light Sensor Module Technical Data
The light Sensor module is a standard item now. It just provides an illuminance value. It is de-
signed with TPS851. This device enables low power consumption to be achieved.
• Little fluctuation in light current and high level of sensitivity
: IL = 37 μA to 74 μA @EV = 100 lx using fluorescent light
: Light current variation width: ×1.67
(When light current classification is specified.)
: Little temperature fluctuation
• Built-in luminous-efficiency correction function, reduced sensitivity variations due to vari-
ous light sources
: IL (using incandescent light)/IL (using fluorescent light) = 1.2 (typ.)
• Low supply voltage, making device suitable for battery-powered equipment: VCC = 2.7
V to 5.5 V
Operating Temperature: -30°C ~ 85°C
Maximum Ratings (25°C)
Characteristics Symbol Rating Unit
Supply voltage VCC -0.5 to 7 V
Output voltage VOUT ≤VCC V
Light current IL 5 mA
Permissible power dissipation P 35 mW
Operating temperature range Topr -30 to 85 °C
Storage temperature range Tstg -40 to 100 °C
Soldering temperature range
(Note 1) Tsol 260 °C
Note 1: The reflow time and the recommended temperature profile are shown in the section entitled
Handling Precautions.
Recommended Operating Conditions
Characteristics Symbol Min Typ. Max Unit
Supply voltage VCC 2.2 —— 5.5 V

Tstat Series
- 5 -
Note 2: CIE standard A light source is used (color temperature 2856K, approximated incandescence
light).
Note 3: Fluorescence light is used as light source. However, white LED is substituted in a mass-pro-
duction process.
IL classification IL (3) A: - > 37 μA to 62 μA, B: 44 μA to 74 μA
Note 4: Light current measurement circuit
Electrical and Optical Characteristics (Ta 25°C)
Characteristics Symbol Test Condition Min Typ. Max Unit
Supply current ICC VCC =3 V, EV=1000 lx
RL =1 k Ω(Note
2)
— 620 — μA
Light current (1) IL (1) VCC =3 V, EV=1000 lx
(Note 2) ,
(Note 4)
—62 — μA
Light current (2) IL (2) VCC =3 V, EV=10 lx
(Note 3) , (Note 4) 3.7 — 7.4 μA
Light current (3) IL (3) VCC =3 V, EV=100 lx
(Note 3) , (Note 4) 37 — 74 μA
Light current ratio IL (1)
——
IL (3)
—— — 1.2 1.7
Dark current ILEAK VCC=3.3 V, EV = 0 — — 0.17 μA

Tstat Series
- 6 -

Tstat Series
- 7 -

Tstat Series
- 8 -
Switching Time Measurement Circuit and Waveforms

Tstat Series
- 9 -
Tstat6 Highlights

Tstat Series
- 10 -
Tstat6 Jumper Settings
Tstat6 Wiring Diagram

Tstat Series
- 11 -
Tstat6-CO2 Highlights
Tstat6-CO2 Jumper Settings

Tstat Series
- 12 -
Tstat6-CO2 Wiring Diagram

Tstat Series
- 13 -
Tstat6-Zigbee Highlights

Tstat Series
- 14 -
Tstat6-Zigbee Jumper Settings
Tstat6-Zigbee Wiring Diagram

Tstat Series
- 15 -
Tstat6-OCC Highlights

Tstat Series
- 16 -
Tstat6-OCC Jumper Settings
Tstat6-OCC Wiring Diagram

Tstat Series
- 17 -
Advanced Menu Item Details
1. Normal State.
2. LCD screen display.
The Tstat6 series thermostats have several advanced menu items which
can be adjusted in the field to suit the application and tune the operation
of the thermostat. Generally speaking, all the parameters are set up at the
factory on an order-by-order basis and will give satisfactory results out of
the box. There are four keys, here show the instructions.
Last menu item
Next menu item
Increase value
Decrease value
1. Now you are in the normal state, when you press or , it will show the set point screen. Press or , to
increase or decrease the set point value. Waiting three seconds will confirm the setting. When the current temp value is
under the set point, it will show the heating symbol. When the current temp value is above the set point value, it will show
the cooling symbol.
3. Now you are in the normal mode, press both and at the same time and hold for several seconds. It will
switch into the menu mode. Press or to scroll through the menu options such as ‘Add’, ‘CAL’, ‘BAUDRATE’,
‘UNITS’ and many others. To change the values at a particular menu, press or . The chosen value will be stored
automatically.
To change the unit’s address scroll through the menu until you reach ‘Add’. Press or to increase or decrease the
unit’s address from 1 to 254.
To change the baudrate, locate ‘baudrate’ within the menu and use and to choose 19200 or 9600.

Tstat Series
- 18 -
Code Description (Range, Default)
Add Modbus Device Address (1-254, 254)
This is the modbus address of the tstat. It is the address to which the stat will respond when receiving serial communication.
CAL Calibration of the Selected Temperature Sensor (0-1000, 500)
To calibrate the temperature shown on the tstat display you will need a handheld mercury thermometer or digital thermometer. Hold
the meter close to the thermostat and allow it to come to equilibrium. Use the keypad to get into the menu mode until CAL is shown
on the display. Now you can adjust the display using the up and down buttons till the temperature shown matches the handheld
meter. When you are done, just let the display time out to normal operation, the display will stop flashing and will show the current
room temperature. You can repeat this sequence if necessary till the readings on the thermostat and meter agree. The thermostat
will store the calibration figures even through extended power outages and should not need to be adjusted for many years. The main
point to keep in mind when calibrating is to let everything come to equilibrium. The thermostat should be powered up for 5 minutes
prior to any calibration and the thermometer should be left near the thermostat for about the same amount of time.
The calibration value is centered around 500 (50.0°) This means that anything above 500 will be added on to the raw temperature
and anything below 500 will be subtracted from the raw temperature. Calibration units are in increments of 0.1° (i.e. 500 means
50.0°) and are in the same units (C or F) as the tstat.
Some calibration tips:
• The main error in calibration comes from not waiting long enough for the handheld thermometer to come to equilibrium.
• Calibrate using the customer’s thermometer, even if it is not an accurate one so that all subsequent measurements are
compared to the same benchmark.
• The sensor inside the thermostat is a digital chip capable of resolving down to 0.06°C so the weak link in calibrating is usu-
ally the procedure used rather than the tstat accuracy.
• Make sure the tstat is mounted in a location free of drafts.
tSS Temperature Sensor Select (0-3, 0)
The tstat has an extra input for use with an external temp sensor.
tSS = 0: The tstat will use the internal temperature sensor IC for the display and PID calculations
tSS = 1: The tstat will use an external thermistor which is shown on the display and used for PID calculations.
tSS = 2: The tstat will use an internal thermistor which is shown on the display and used for PID calculations.
tSS = 3: The tstat will use an average of internal thermistor and external thermistor which is shown on the display and used for PID
calculations.
FIL Temperature Sensor Filter (0-10, 5)
Filter used for the raw temperature being read by the sensor.
This configures the weighted average used when filtering the raw temperature. 0 corresponds to no filter. 10 corresponds to a high
level of filtering. Set this to a low value if you want the input to respond quickly, a high value will smooth the readings more but make
them respond more slowly.
BAUDRATE 19200, 9600
dSC Short Cycle Delay (0-20, 0)
This parameter adjusts the delay between cycling of the mode of operation. It is the number of minutes after entering coasting mode
until the tstat can re-enter the mode it came from. For example, if the tstat is in Cooling1 mode, and then enters Coasting mode, it
will take a delay, dSC minutes, until it can re-enter into Cooling1 mode. This value is in increments of 1 min.
dCH Changover Delay (0-200, 0)
This parameter adjusts the delay between switching from a heating mode of operation to a cooling mode of operation or vice versa.
It is the number of minutes after leaving cooling or heating mode before the tstat can enter the opposite mode. This value is in
increments of 1 min.

Tstat Series
- 19 -
Code Description (Range, Default)
PPr Proportional Term (10-255, 20)
The proportional term is the ‘P’ term of the familiar PID control strategy and determines how fast a valve will react to a deviation from
setpoint at a particular instant in time. The default value of 2.0° (C or F) is fine for most applications, where a 2.0° deviation is required
to make the valve respond 100%. For example, with the PPr term set to 2.0 (°C) and the cooling setpoint is set to 20°C, the valve will be
open 100% by the time the room hits 22°C. A larger PPr term will make the valve lazy since the deviation from setpoint will have to be
greater before it opens 100%. A smaller value makes the valve respond more quickly. The factory setting of 2.0° (C or F) is fine where the
thermostat is located out of the direct airflow in an office size room. For a smaller room or if the thermostat is located directly under the air
vent, a slower acting valve is required to avoid short cycling, so set the value of PPr to 3.0° or 4.0°. The PPr term acts in cooperation with
the PIn term which is described next. The P value is in increments of 0.1° (i.e. 20 means 2.0°) and is in the same units (C or F) as the tstat.
PIn Integral Term (0-255, 50)
The integral term is the ‘I’ term of the familiar PID control strategy and determines how fast a valve will react to a deviation from setpoint
over time. For example with the room slightly above setpoint, the ‘P’ term may be basically satisfied, but a small deviation still exists. This
deviation is summed up or ‘Integrated’ over time and the I term will gradually open the valve to make up the final small deviation from set-
point. The default value of 5.0 (%/Deg minute) is fine for most applications and will cause the valve to open 5% for one degree (C or F) of
error per minute. For example, when the PIn term set to the default of 5.0 (%/Deg minute), the cooling setpoint is set to 20°C, and the room
temperature is 21°C, the valve will be open partially due to the “P” term described earlier but the condition continues and we would like
the valve to be opening up slowly to make up the final temperature error. If this situation of 1.0°C error continues for one minute, the error
accumulates and the I term nudges the valve open an additional 5%. If the previous explanation is not clear, a couple of helpful reminders
are as follows: -think of the I term as the opposite of the P term, -”a bigger I means faster valve, smaller I means lazier valve”. -The default
value of 5% will work fine for most applications. -If the valve is short cycling, make the I term lazier (smaller). The I value is in increments
of 0.1 %/°min (i.e. 50 means 5.0%/°min) and is in the same units (C or F) as the tstat.
SOP Sequence of Operations (0-2, 1)
The Sequence of operation is normally set at the factory and does not need to be adjusted. The thermostat supports field adjustment of
the operation to suit different variations of mechanical equipment. Setting this value to a different value will cause the thermostat to stop
working properly, so be careful not to adjust this value unless you are familiar with the various sequences.
Standard Operation:
When SOP is set to 1, the sequence of operations is stored in a table that allows for basically any arbitrary sequence of operation, for
example the tstat could be set up to control 5 stages of cooling, 5 stages of heating, or anything in between. Each output is individually
assigned to be active in any particular section of the cooling or heating cycle. There are 7 discreet steps, Heat3, Heat2, Heat1, Coasting,
Cool1, Cool2 and Cool3. So the table is a 5 outputs x 7 steps spreadsheet arrangement and you fill in the blanks to suit the application.
The settings can be stored in an external text file that is easily read and modified in a text editor. The “Tstat Factory” software utility on our
website (http://www.temcocontrols.com/ftp/tstat5software.zip) allows you to send your favorite sequence of operations table to a new tstat
speeding up the configuration process.
Transducer Mode:
Setting SOP to 2, puts the Tstat into transducer mode. In this mode, the cooling analog output corresponds directly to the room tempera-
ture in degrees C (i.e. at 25°C, the output would be 2.5V). The heating analog output corresponds directly to the setpoint in degrees C.
And relay1 corresponds to the occupied/unoccupied mode (occupied = relay1 ON, unoccupied = relay1 OFF).
Test Mode:
A special sequence of operations is embedded in the tstat that assists in commissioning of the installation and testing of the tstats. When
SOP is set to ‘0’ this is the testing sequence and the unit will cycle the relay outputs on and off in a slow rotation. The analog outputs are
also cycled in a slow ramp, the cooling goes from 0-10V while the heating goes in reverse from 10 to 0V. The duty cycle of this rotation is
approximately 20 seconds, be sure the mechanical system is able to handle this sort of cycling before using this feature.
HC Heating Cooling Mode Configuration (0-5, 0)
This item configures the method by which the tstat determines the heating or cooling mode.
HC = 0: mode is controlled automatically by the PID. PID > 52 is heating mode, PID < 48 is cooling mode.
HC = 1: mode is controlled by the keypad or serial communication. This is for keypad configurations in which the user or serial com can
manually set heating or cooling.
HC = 2: mode is controlled by the active high digital input. High is heating, low is cooling.
HC = 3: mode is controlled by the active low digital input. High is cooling, low is heating.
HC = 4: mode is controlled by difference in temperature of setpoint and analog in1 sensor. If the temperature of the sensor is greater
than the setpoint, the tstat will be in cooling mode, and if the temperature of the sensor is less than the setpoint, the tstat will be
in heating mode. This is primarily used for 2-pipe systems.
HC = 5: same as mode 4, but using the analog in2 sensor instead of analog in1.

Tstat Series
- 20 -
Code Description (Range, Default)
Hdb
Cdb Heating & Cooling Deadbands (1-200, 10)
If there is one setpoint, the heating setpoint follows the cooling setpoint and is calculated by:
Heating Setpoint = Setpoint - Heating Deadband.
Cooling Setpoint = Setpoint + Cooling Deadband
If there are two setpoints, heating and cooling are separately adjusted. The setpoints are calculated as follows:
Heating Setpoint = Max( Cooling Setpoint + Cooling Deadband , Heating Setpoint )
Cooling Setpoint = Min( Cooling Setpoint, Heating Setpoint - Cooling Deadband)
The min value for Cdb is 1.0° (C or F) to ensure that simultaneous heating and cooling is never allowed. The maximum value is arbitrarily
set to 20.0°. The deadband values are in increments of 0.1° (i.e. 20 means 2.0°) and are in the same units (C or F) as the tstat.
UNITS Degrees C/Degrees F (0-1, - )
The display can be switched to show Degrees C or Degrees F. 0 = C, 1 = F.
FAn Number of Fan Speeds to show on the display (0-3, 3)
The number of fan speeds allowed. Fan = 3, user will see “Off, -1-, -2-, -3-, Aut” Fan = 2, user will see “Off, -1-, -2-, Aut” Fan = 1, user will
see “Off, -1- , Aut” , Fan = 0, user will see “Off, On”
nHd Night Heating Deadband (0-35, 10) for deg C, (0-95, 10) for deg F
nCd Night Cooling Deadband (0-99, 10) for deg C and F
When the tstat is in unoccupied mode, and APP is set to 0, the heating setpoint is adjusted downwards by the amount of the nHd. The
cooling setpoint is adjusted upwareds by the amount of nCd. The night deadband values are in increments of 1° (i.e. 10 means 10°) and
are in the same units (C or F) as the tstat.
Note: The night heating setpoint is prevented through an internal software interlock from being set below 5°C, regardless of the user heat-
ing setpoint and the value stored in NHS.
nSp
APP Application (0-1, 0)
0 - OFFICE applications mode
The night time setpoints are specified value
Night Heating Setpoint = nHS value.
Night Cooling Setpoint = nCS value.
1 - HOTEL or RESIDENTIAL applications mode
The night time setpoints are a specified deadband in relation with the day time setpoints
Night Heating Setpoint = Cooling Setpoint - nHd value.
Night Cooling Setpoint = Cooling Setpoint + nCd value.
POS Power on setpoint (0-255, 20) for deg C, (0-255, 68) for deg F
Certain applications require the thermostat to power up with a known setpoint that is stored through a power outage. This feature is useful
in some of the transducer modes where the central DDC controller can cycle the power to the thermostats to reset the room setpoints to a
known value every day. The power on setpoint value is in increments of 1° (i.e. 20 means 20°) and is in the same units (C or F) as the tstat.
POn Power on Mode (0-3, 3)
This setting allows the thermostat to power up in one of three modes: 0 = power off, 1 = power up in on mode, 2 = last value (default), 3 =
auto mode. The on and off settings are self explanatory and are useful in certain DDC applications where the central controller can cycle
the power to each thermostat to sweep them off each evening for example. The default value is “last value” and will cause the thermostat
to power up in whatever state it was in before the power outage.