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CCTHV-407-BACnet v1.3.3
The image may differ from the actual product
2016-02-11
Martin Labbé, eng. and Jasmin Goupil
Cristal Contrôles Ltd
2025 Lavoisier, Local 135
Québec, (Québec) Canada G1N 4L6
Tél 418-681-9590 - Fax 418-681-7393
http://www.cristalcontrols.com
Table of contents
1.
General Description ....................................................................................... 6
2.
Installation...................................................................................................... 6
2.1. Opening the enclosure ............................................................................. 7
2.2. Fixing the thermostat ............................................................................... 7
3.
Wiring............................................................................................................. 8
WARNING : ELECTRICAL RISK ................................................................... 8
3.1. Terminal identification .............................................................................. 8
3.2. 1 Transformer connections .................................................................... 10
3.3. 2 Transformers connections .................................................................. 11
3.4. 3 Transformers connections .................................................................. 12
4.
CCTHV Inputs.............................................................................................. 12
4.1. Digital ..................................................................................................... 12
4.2. 0-10Vdc ................................................................................................. 13
4.3. Remote temperature .............................................................................. 13
5.
CCTHV Outputs ........................................................................................... 14
5.1. 2x Triac .................................................................................................. 14
5.2. 4x Relay ................................................................................................. 14
5.3. 0-10Vdc ................................................................................................. 14
6.
General usage ............................................................................................. 15
7.
Software Algorithm ...................................................................................... 16
Cristal Contrôles Ltd
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Tél 418-681-9590 Fax 418-681-7393
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7.1. Temperature .......................................................................................... 17
7.2. Thermostat’s configuration..................................................................... 17
Menu – User interface ................................................................................. 18
8.
8.1. Version................................................................................................... 18
8.2. Room temperature ................................................................................. 18
8.3. Room setpoint ........................................................................................ 19
9.
Menu - Configuration ................................................................................... 19
9.1. Version................................................................................................... 20
9.2. MAC MSTP address .............................................................................. 20
9.3. Maximum MSTP master ........................................................................ 21
9.4. Serial Baud Rate .................................................................................... 21
9.5. MSTP maximum info frames.................................................................. 22
9.6. Device Identifier ..................................................................................... 22
9.7. Temperature calibration ......................................................................... 23
9.8. Read Property Multiple configuration ..................................................... 23
9.9. LCD test display ..................................................................................... 24
10.
Communication ......................................................................................... 25
11.
Configuration ............................................................................................. 29
11.1.
« Objects » ......................................................................................... 30
11.2.
Temperature ....................................................................................... 31
11.3.
HVAC Outputs .................................................................................... 32
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11.4.
Digital Inputs ....................................................................................... 34
11.5.
Relays ................................................................................................ 35
11.6.
System Settings.................................................................................. 36
11.7.
Configuration’s Buttons ...................................................................... 38
“Clone Config.” Button ................................................................................. 39
11.8.
System operation ................................................................................ 40
12.
Dimensions ............................................................................................... 42
13.
Models ...................................................................................................... 43
14.
Hardware specifications ............................................................................ 44
14.1.
Outputs ............................................................................................... 44
14.2.
Inputs .................................................................................................. 44
14.3.
Jumpers .............................................................................................. 44
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List of figures
Figure 1 – Hexagonal screw ................................................................................. 6
Figure 2 – Opening the enclosure ......................................................................... 6
Figure 3 – Back plate ............................................................................................ 6
Figure 4 - 1 transformer wiring ............................................................................ 10
Figure 5 - 2 transformers wiring .......................................................................... 11
Figure 6 - 3 transformers wiring .......................................................................... 12
Figure 7 – Liquid crystal display .......................................................................... 15
Figure 8 - Objects tab ......................................................................................... 30
Figure 9 – HVAC Outputs tab ............................................................................. 32
Figure 10 - Inputs tab .......................................................................................... 34
Figure 11 - Relays tab......................................................................................... 35
Figure 12 - Settings tab ....................................................................................... 36
Figure 13 – “Clone config.” interface ................................................................... 39
Figure 14 - Heating schematic ............................................................................ 40
Figure 15 – Cooling schematic............................................................................ 41
Figure 16 – CCTHV-407 dimensions .................................................................. 42
Figure 17 – Blind Thermostat .............................................................................. 43
Figure 18 – Thermostat with a round knob ......................................................... 43
Cristal Contrôles Ltd
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1. General Description
Cristal Controls’ CCTHV-407 is a thermostat which can be used stand-alone or
with communication. It has 7 outputs: 2 triacs, 1 analog 0-10 Vdc and 4 dry
contacts. Also, it has 2 dry contact inputs, one remote sensor input for a second
(10K) temperature sensor and a 0-10Vdc input.
The CCTHV-407 software allows many adjustments of the heating and cooling
algorithm. His flexibility allows the control of many outputs types according to the
software’s configuration.
2. Installation
Figure 1 – Hexagonal screw
Figure 2 – Opening the enclosure
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Figure 3 – Back plate
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2.1. Opening the enclosure
1. Turn OFF any power supply to the thermostat. Opening the thermostat
enclosure while being powered on may damage the unit.
2. Use 1/16" hexagonal key to make the screw penetrate inside the
enclosure and release the bottom-front part of the thermostat.
3. Gently pull bottom-front of the thermostat to release some pressure on the
pins from the internal connectors.
4. Pull front enclosure from the top to free the connectors completely.
2.2. Fixing the thermostat
Mount the thermostat at about 1.5 meters (5 feet) from the floor and avoid places
where it can be disturbed by:
•
Restrained vertical air circulation like behind a door or in a corner.
•
Exposition to warm or chilled air from ventilation ducts.
•
Direct sun radiation or heat from surrounding appliances.
•
Hidden water pipes or chimneys.
•
Places not at ambient temperature like an outside wall.
•
Make sure there is no negative or positive back draft from the wall.
It is recommended to patch the hole in the wall with a non-flammable insulator to
avoid air drafts and cause temperature fluctuations.
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3. Wiring
WARNING : ELECTRICAL RISK
Turn off the power supply before the beginning of the installation.
Otherwise it can cause electrical shocks and damage the
equipment.
3.1. Terminal identification
Y1
Contact for first cooling stage.
Y2
Contact for second cooling stage.
Rc
(Cooling hot supply) Connect to the hot on the secondary side of
the transformer from your cooling unit.
0-10V out
0-10Vdc output for modulated heating stage.
W1
Triac output for first heating stage. This heating output is fed from
the thermostat then its load reference must be the same as the one
from the thermostat.
W2
Triac output for second heating stage.
Bus-A
Positive terminal for RS-485 communication.
Bus-B
Negative terminal for RS-485 communication.
0-10V In
0-10Vdc input.
Gnd
Common terminal for analog 0-10Vdc signals.
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AUX
Relay contact for accessories or auxiliary heating.
G
Fan Relay contact
COM
Common hot signal for contacts AUX and G.
T Ext
Two terminals for a remote temperature sensor with impedance of
10K at 25°C.
DI1-DI2
Digital inputs to detect a dry contact between this input and terminal
COM2.
COM2
Common reference terminal for digital inputs 1 and 2.
24Vac_L
Positive (hot) power supply terminal.
24Vac_N
Negative (neutral) power supply terminal.
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3.2. 1 Transformer connections
Hot
Com
Auxiliary
Output
AUX
Fan
CCTHV 407
Y1
Cool 1
G
Y2
Cool 2
COM
RC
T° Ext
0-10V Out
Device 1
T° Ext
W1
Heat 1
DI_1
W2
Heat 2
COM2
Bus-B
D1_2
Bus-A
24Vac_L
0-10V In
24Vac_N
Gnd
10K
Device 2
Com
Figure 4 - 1 transformer wiring
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3.3. 2 Transformers connections
Hot
Com
Auxiliary
Output
AUX
Fan
CCTHV 407
Y1
Cool 1
G
Y2
Cool 2
COM
RC
T° Ext
0-10V Out
Device 1
T° Ext
W1
Heat 1
DI_1
W2
Heat 2
COM2
Bus-B
D1_2
Bus-A
24Vac_L
0-10V In
24Vac_N
Gnd
10K
Device 2
Com
Figure 5 - 2 transformers wiring
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3.4. 3 Transformers connections
Auxiliary
Output
AUX
Fan
CCTHV 407
Y1
Cool 1
G
Y2
Cool 2
COM
RC
T° Ext
0-10V Out
Device 1
T° Ext
W1
Heat 1
DI_1
W2
Heat 2
COM2
Bus-B
D1_2
Bus-A
24Vac_L
0-10V In
24Vac_N
Gnd
10K
Device 2
Figure 6 - 3 transformers wiring
4. CCTHV Inputs
4.1. Digital
The two digital inputs must be used with COM2. Terminal COM2 supplies 30Vdc
and the digital inputs sense if this voltage is present or not. A contact must be
closed between COM2 and one of the inputs to detect a signal. Those inputs are
optically isolated.
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4.2. 0-10Vdc
This input could read as a 0 to 100% and °C value using the corresponding
BACnet objects.
The thermostat’s algorithm can use a remote temperature sensor instead of the
internal sensor. See Section 11.2 “Temperature”.
The input impedance is 30K.
4.3. Remote temperature
Terminals used for a remote temperature sensor of 10K @ 25°C. Here are
some compatible temperature curves:

Dale curve #1

ATP curve Z

BAPI curve #2

Mamac curve #12

Greystone curve #2.
The thermostat’s algorithm can use the remote temperature sensor instead of the
internal sensor. See Section 11.2 “Temperature”.
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5. CCTHV Outputs
5.1. 2x Triac
The two triac outputs are protected with 550 mA fuses.
Those fuses reset
automatically when power supply is turned off from the thermostat for a few
seconds.
5.2. 4x Relay
The 4 relay outputs are independent but are grouped from 2 common terminals.
Terminal RC is tied to Y1 and Y2 and COM is tied to G and AUX.
5.3. 0-10Vdc
0-10Vdc output is protected against short-circuits and inverted polarity from a
140 mA fuse.
However, the use of a maximum 5 mA load or lower is
recommended since it may generate heat and influence temperature readings of
the device. The fuse resets automatically when power supply is turned off from
the thermostat for a few seconds.
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6. General usage
Figure 7 – Liquid crystal display
1 – Main display characters. For example, show the temperature.
2 – Units for main display: degrees Celsius, degrees Fahrenheit or percent.
3 – Pictograms showing actual thermostat mode
Day mode (occupied)
Auxiliary output activated
Night Mode (unoccupied)
Humidifier in use
Cooling enabled
Temperature mode
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Heating enabled
Time / Alarm
Fan enabled
4 – Display a setpoint change is in progress. Can also tell if it is above or below
the limit where applicable.
5 – Secondary text to identify main display characters.
6 – Progress bar graph.
7. Software Algorithm
This software provides simple thermostat functions. The inputs and outputs of the
thermostat can be configured as needed using the Cristal Controls “BACnet
Browser” software application. Up to 2 cooling stages dry-contacts type can be
configured and up to 5 heating stages (2 stages dry-contacts type, 2 modulating
outputs and an emergency heating stage).
With the BACnet objects, it is possible to: apply occupied or unoccupied mode,
do some shedding by adjusting maximum power for the thermostat and select
heating or cooling mode only.
All outputs can be controlled directly but some are also controlled from the
thermostat application.
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7.1. Temperature
After being powered ON, it takes at least 15 minutes before temperature reach
stable and accurate readings.
This delay must elapse before the electronic
components warm the enclosure and stabilize readings.
Also, an internal filtering algorithm is applied on temperature readings to avoid
fast glitches on readings. For large permanent changes, this has the effect of
seeing 95% of the change in 3 minutes.
The thermostat algorithm continues even if the temperature is out of range. If the
temperature is below 10° Celsius, the thermostat uses a temperature value of 99° Celsius for his internal calculation. If the temperature is over 60° Celsius, the
thermostat uses a temperature value of 99° Celsius for his internal calculation.
7.2. Thermostat’s configuration
The thermostat’s configuration is done using the “Config.bin” file available in the
BACnet network. The file is used to configure the 2 cooling stages, the 5 heating
stages and to choose the used outputs for the activated stages. The
temperature’s sensor can be configured to use the internal sensor or add an
external sensor connected to the corresponding input. Unused relays and inputs
can be configured to accomplish some specific tasks.
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8. Menu – User interface
This section shows different screens on the display and their functionalities.
8.1. Version
100
IO-DEMO
After the thermostat is being powered up, it displays the name of the firmware
and the current software version number for a period of 3 seconds. Then the
display changes to the room temperature (8.2).
8.2. Room temperature
215
Local.
This is the default screen being displayed by the thermostat. To the left a bar
graph shows heating demand in 20% steps.
If the round knob is being rotated, the display goes to the room temperature
setpoint (8.3).
The display can be configured to display in °F or °C by installing a jumper
(supplied) on JP4 on the back of the thermostat.
When the temperature falls below 10° Celsius, the screen displays “LOW”. When
the temperature is over 60° Celsius, the screen displays “HIGH”. If the
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temperature falls under about -5° Celsius, the temperature sensor is considered
as disconnected and the screen displays dashes “- - -“. If the temperature goes
over about 70° Celsius, the temperature sensor is considered as shorted and the
screen displays dashes. “- - -“.
8.3. Room setpoint
215
Local.
This screen is displayed while changing the room temperature setpoint. The 2
arrows indicate we are changing the setpoint. Also, the temperature setpoint is
blinking once a second to let you know you are changing the setpoint and not
seeing the temperature reading.
When the round knob is not moving for 5 seconds, the display goes back to the
room temperature (8.2).
9. Menu - Configuration
Network configurations can be changed by installing the (supplied) jumper on
JP3 before powering the thermostat. JP3 can be used to cycle through the
menus if no buttons are installed on the thermostat. The thermostat enters in a
hidden menu for the following parameters.
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WARNING: A misuse of these parameters can cause network communication
problems on this thermostat and other devices on the network. Consult your
BACnet network administrator about accurate parameters to be configured.
9.1. Version
On a standard power up, display shows the name of the firmware and the current
software version number for a 3 seconds period. After that, the display shows to
the MAC MSTP address (9.2).
9.2. MAC MSTP address
1F
MAC Addr
This parameter allows changing the address used on the RS-485 twisted pair
network. We can see at the bottom of the display « MAC Addr ».
Rotating the round knob can change the MAC address.
The values are
displayed in hexadecimal; possible values are from 0 to FE. This address must
be unique for every device connected on the same RS-485 network segment.
When button « * » is pressed, the display changes for the maximum MSTP
master (9.3).
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9.3. Maximum MSTP master
127
Max Mstr
This parameter allows adjustment of the maximum master searched by the
MSTP protocol. We can see at the bottom of the display « Max Mstr ».
Rotating the round knob can change this value. The possible values are from 0
to 127 and the default value is 127. This can be decreased according to the
device with the highest address to optimize search time from MSTP protocol.
When button « * » is pressed, the display changes for the serial baud rate (9.4).
9.4. Serial Baud Rate
38K
BaudRate
This parameter allows adjusting RS-485 serial communication speed. We can
see at the bottom of the display « BaudRate ».
Rotating the round knob can change this value. The possible values are 9K,
19K, 38K, 57K, 76K, 115K, and 230K; they represent the serial speed in kilo bits
per second.
The exact values for « Baud Rate » are: 9600, 19200, 38400,
57600, 76800, 115200, and 230400. The default value is 38K for 38400 baud.
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When button « * » is pressed, the display changes for MSTP maximum info
frames (9.5).
9.5. MSTP maximum info frames
1
Max Info
This parameter allows adjusting the maximum number of messages sent by the
device before passing the token to another MSTP device.
Rotating the round knob can change this value. Possible values are between 1
and 32. Usually this value is 1. Increasing this value will allow this device to
communicate more often than the others.
When button « * » is pressed, the display changes for the device identifier (9.6).
9.6. Device Identifier
ID
0>0<0000
This parameter allows adjusting the BACnet device ID. This number must be
unique on the whole BACnet network and must be between 0 and 4194302
(0x3FFFFE).
Rotating the round knob can change this value. The device ID is displayed as a
hexadecimal number.
Each number is changed individually when displayed
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between the two arrows «  » and «  ». Each time the button « * » is pressed,
the arrows and the number being modified is moving to the right.
After the « * » button has been pressed 6 times, the display changes for the
temperature calibration (9.7).
9.7. Temperature calibration
-15
Offset
This parameter allows calibrating the temperature as read by the thermostat.
We can see at the bottom of the display « Offset ».
Rotating the round knob can change this value.
This will be added to the
thermostat reading.
When button « * » is pressed, the display changes for the Read Property Multiple
configuration (9.8).
9.8.
Read Property Multiple configuration
OFF
READMULT
This parameter allows the activation of « Read property multiple » BACnet
message’s type. When a controller doesn’t manage this type of message
correctly, it is suggested keeping this parameter disabled.
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When button « * » is pressed, the display changes for the LCD test display (9.9).
9.9. LCD test display
ÿÿÿÿ
ÿÿÿÿÿÿÿÿ
The last screen is the LCD test.
It allows checking that every segment is
displaying properly.
When button « * » is pressed, the display exit from the configuration menu and
the displays go to the main screen with local room temperature (8.2).
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10. Communication
The communication to the CCTHV-407 is done using BACnet MSTP protocol on
a RS-485 physical link. The BACnet network allows the reading of the thermostat
states and the writing of new setpoints and configurations.
Network’s Characteristics
When the CCTHV-407 thermostat is at one end of a RS-485 network, we may
enable the terminating resistor by installing JP1 (supplied) to end the network or
use an external resistor. (Call Cristal Controls for model number and order)
For more information, refer to the Cristal Controls manual “Setting up a RS-485
Network”.
Next is the BACnet objects list. This list is simple and many objects allow direct
control on inputs and outputs of the thermostat.
Object
Instance
Device
Name
Min Value
Max Value
CCTHV-407-BAC
0
4194302
Default
BI
0
DIGITAL IN 1
0 = OFF
1 = ON
BI
1
DIGITAL IN 2
0 = OFF
1 = ON
BO
0
RELAY AU
0 = OFF
1 = ON
0 = OFF
BO
1
RELAY G
0 = OFF
1 = ON
0 = OFF
BO
2
RELAY Y1
0 = OFF
1 = ON
0 = OFF
BO
3
RELAY Y2
0 = OFF
1 = ON
0 = OFF
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Description
Notes
Digital input DI
1
Digital input DI
2
Auxiliary Relay
"AU"
3
3
Fan Relay "G"
Cooling Relay
"Y1"
Cooling Relay
"Y2"
3
3
2016-02-11
25
Occupied mode.
Will allow
thermostat to
change the
setpoint.
BV
0
OCCUPIED MODE
0=
UNOCCUPIED
1 = OCCUPIED
1 = OCC
BV
1
FAN STATUS
0 = OFF
2=
UNCONFIGURED
2=
UNCONFIGURED
AI
0
TEMPERATURE INT
-327.6°C
327.6°C
AI
1
TEMPERATURE REM
-327.6°C
327.6°C
AI
2
INPUT 0-10V
0.0%
100.0%
AI
3
TEMPERATURE 0-10V
-3276.7°C
819.0°C
AO
0
TRIAC W1
0.0%
100.0%
0.0%
AO
1
TRIAC W2
0.0%
100.0%
0.0%
AO
2
OUTPUT 0-10V
0.0%
100.0%
0.0%
AV
0
OFFSET INT
-10.0°C
10.0°C
-2.9°C
AV
1
OFFSET REM
-10.0°C
-327.0°C
10.0°C
327.0°C
-0.5°C
Fan Relay state
feedback
On-board
internal 10K
temperature
sensor.
Optional
remote 10K
temperature
sensor.
From 0-10 Volts
DC analog input
"0-10_In".
Optional 0-10V
temperature
sensor.
Heating Triac
"W1". Value
will pulse at 1
Hz.
Heating Triac
"W2". Value
will pulse at 1
Hz.
0-10 Volts DC
analog output
"0-10_Out".
Internal
temperature
calibration.
External
temperature
calibration.
(INT / REM)
(INT / REM)
-3276.7°C
819.0°C
21.0°C
Temperature
setpoint for
heating.
2, 6, 7
23.0°C
Temperature
setpoint for
cooling.
2, 6, 7
AV
AV
9
10
SET-POINT HEAT
SET-POINT COOL
(0-10V)
(0-10V)
-327.0°C
327.0°C
(INT / REM)
(INT / REM)
-3276.7°C
819.0°C
(0-10V)
(0-10V)
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3
3
4
4
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AV
2
SET-POINT HEAT
UNOCC
-327.0°C
327.0°C
(INT / REM)
(INT / REM)
-3276.7°C
819.0°C
(0-10V)
(0-10V)
-327.0°C
327.0°C
(INT / REM)
(INT / REM)
18.0°C
AV
3
SET-POINT COOL
UNOCC
-3276.7°C
819.0°C
(0-10V)
(0-10V)
25.0°C
AV
4
SET-POINT MIN
10.0°C
70.0°C
15.0°C
AV
5
SET-POINT MAX
10.0°C
70.0°C
25.0°C
AV
6
HEATING STATUS
0.0%
100.0%
0.0%
AV
7
COOLING STATUS
0.0%
100.0%
0.0%
AV
8
POWER LIMIT
0.0%
100.0%
100.0%
AV
11
SETPOINT HEAT LIMIT
-99.0°C
99.0°C
99.0°C
AV
12
SETPOINT COOL LIMIT
-99.0°C
99.0°C
-99.0°C
AV
13
TEMPERATURE 0-10V
MIN
-3276.7°C
819.0°C
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Unoccupied
temperature
setpoint for
heating.
Unoccupied
temperature
setpoint for
cooling.
Minimum
temperature
setpoint
adjustable on
the thermostat.
Maximum
temperature
setpoint
adjustable on
the thermostat.
Heating status
of the
thermostat,
output
independent.
Cooling status
of the
thermostat,
output
independent.
Allowed
maximum value
for the outputs.
0% = Full
Shedding.
Disable
shedding if
temperature fall
below this limit.
Disable
shedding if
temperature
increase over
this limit.
Minimal value
in °C for the 010V input.
Value in °C
corresponding
to 0V.
1, 4, 6,
7
1, 4, 6,
7
4
4
4, 6
4, 6
4
1, 4, 8
1, 4, 8
2016-02-11
27
AV
14
TEMPERATURE 0-10V
MAX
-3276.7°C
819.0°C
MSV
0
HVAC MODE
1
6
MSV
FILE
1
0
FAN MODE
Config.bin
1
-
5
-
1
Maximal value
in °C for the 010V input.
Value in °C
corresponding
to 10V.
Enable/Disable
Cooling, Heating
and Emergency
Heat
2
Fan mode
behavior
adjustment.
-
Thermostat
configuration
file
5
Notes:
1
Negative values will be relative to the occupied setpoint.
2
User setpoint adjustment from thermostat write at a configurable
priority in the “Settings” tab of the software “BACnet Browser” (see
section 14.6 “Settings”).
3
The thermostat writes the object at a configurable priority in the
“Settings” tab of the software “BACnet Browser” (see section 14.6
“Settings”).
4
No priority
5
Mode definition: “On” : always enable, “Auto”: enable when heating or
cooling, “Fan Cool”: stay enable when last active stage was a cooling
stage, “Fan Heat”: stay enable when last active stage was a heating
stage, “As schedule”: enable when occupancy mode is occupied,
“Auto” otherwise.
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6
When no heating stages are configured, the “Reliability” properties of
the objects linked to heating take the “No Output” value. Same thing
happens to objects linked to cooling when no cooling stages are
configured.
7
Using the 0-10V temperature input, the minimum and maximum values
depend
on
the
objects
“TEMPERATURE
0-10V
MIN"
and
"TEMPERATURE 0-10V MAX".
8
Temperature setpoints less comfortable than the occupied setpoint are
ignored.
11. Configuration
The thermostat can be configured using the Cristal Controls "BACnet Browser"
software. This software allows you to read ("Read Config" button) and write
("Send Config" button) the CCTHV-407 configuration. The configuration can also
be saved ("Save Config" button) and read ("Load Config" button) the
configuration in a file. The button "Clone Config" allows sending a similar
configuration
to
multiple
thermostats.
Here
are
the
different
CCTHV-
407configurations and their uses.
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11.1.
« Objects »
Figure 8 - Objects tab
The "Objects" tab provides access to the configuration of BACnet objects. You
can configure the "Device Id", the "Device Name" as well as adjustments to the
two temperature sensors. Different setpoints can be changed, and the maximum
and minimum allowable when the user changes the setpoints. Temperature read
by the 2 probes is also shown (Note: temperatures are read only once and are
not updated). You can change the operating modes of the thermostat ("HVAC
Mode" and "Fan Mode").
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The "SET-POINT HEAT UNOCC" and " SET-POINT COOL UNOCC " values
indicate the setpoint in heating and cooling use when the thermostat is in
unoccupied mode. A positive value indicates the setpoint to be used directly. A
negative value (between 0 ° C and -5 ° C) indicates that the unoccupied setpoint
is relative to the value of the occupied setpoint. Unoccupied heating setpoint is
equal to the occupied heating setpoint plus the setpoint unoccupied. The cooling
setpoint is equal to the unoccupied cooling setpoint occupied subtracted from the
unoccupied setpoint.
11.2. Temperature
This tab is to select the temperature sensor to be used; either the thermostat
internal sensor, an external sensor to be connected to the corresponding input or
a temperature reading connected to a 0-10V input. See section "4.3 Remote
Temperature" for the specifications required to use an external probe. See
section "4.2 0-10Vdc" for the specifications required to use the 0-10Vdc input.
The value of "Temp. filter time" indicates the time constant of the filter imposed
on the temperature. This value limits the rate of change on the temperature
reading, thus eliminating temporary disturbances. It is recommended keeping the
default setting at (60). When this value decreases, the temperature varies more
rapidly, and it varies more slowly when increasing the value.
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11.3. HVAC Outputs
Figure 9 – HVAC Outputs tab
This tab allows the "outputs" configuration use for heating and cooling. You can
configure the "Fan", "Cool1", "Cool2", "Heat2" and "Heat3" stages on the desired
output. Those stages are ON/OFF stage. The "Heat1" and "Heat4" stages are
used as modulating outputs. Select "None" to indicate that a stage is not used in
the thermostat configuration.
On the output configuration the option "NC / Inverted” or “Inverted" is used to
indicate that the output is normally closed (i.e. the relay makes contact) or the
analog output is at 100% when the corresponding stage is not enabled. When
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modulating the output, the signal will also be reversed and then use its maximum
output when demand is 0%. The output is at its minimum when demand is higher.
The “Off on Cool2” and “Off on Heat3” options of "Cool1" and "Heat2" stages
indicate that when moving to a higher stage ("Cool2" in the case of "Cool1" and
"Heat3" in the case of "Heat2"), the lower stage is disabled. When you return to
the stage below, it is reactivated.
A reversing valve can be configured. The relay then makes contact when the
thermostat is in cooling mode. It can also reverse this configuration by using the
"NC" and thus make contact when the thermostat is on heating mode.
"Cool1", "Cool2", "Heat2" and "Heat3" stages are considered using a
compressor. Starts and stops of these 4 courses are limited by the properties
"Min. ON Time" and "Min. Time OFF" in the “Settings” tab.
The "Emg. Heat" stage is used to configure a modulated or relay output to be
used when the system is on the "Emergency Heat" mode. The options "NC /
Inverted" reverse the operating mode of the output according to its type used.
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11.4. Digital Inputs
Figure 10 - Inputs tab
This tab allows the configuration of the digital inputs so they perform different
tasks. The option "Occupancy" allows the input to change the occupancy mode
of the thermostat. The option "Alarm" allows the input to control the display of an
alarm that will be displayed on the screen.
The alarm message is limited to 8 characters and must be entered in the text box
option. The option "Emg. Heat" allows the activation of the "Emergency Heat"
stage by the digital input. The various options are normally activated when the
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digital input makes contact, and can reverse this operation with the "Inverted"
checkbox.
11.5. Relays
Figure 11 - Relays tab
This tab allows the configuration of the relays so that they perform other tasks
than output for the different stages of heating and cooling. When a relay is
already used in the "Output" tab, it is not configurable in the "Relays" tab. The
"Occupancy" option has the relay to change its state when the occupancy of the
thermostat changes. The relay then makes contact when the thermostat is in
occupancy but using the "NC" option can reverse it. The option "Alarm" has the
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relay to make contact when a selected digital input is connected. Both digital
inputs can be activated for a relay so the relay will make contact when one of the
digital inputs is connected. The 'Inverted' options enable the corresponding relay
contact when the input is open and the "NC" option allows the relay to be
normally closed.
11.6. System Settings
Figure 12 - Settings tab
This tab allows the configuration of different numerical values managing the
system’s behavior. Here are the configurable numerical values and their
descriptions.
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Values
Description
Units
Default
« Dead band »
Difference between the heating and cooling
Degrees
2.0
setpoints.
Celsius
Difference between the activation and
Degrees
deactivation of the "Heat2”, “Heat3”, “Cool1”
Celsius
« Hysteresis »
Note
1.0
and “Cool2” stages.
« Stage diff. »
Difference between Cooling or Heating stages Degrees
1.0
(ex. : between “Cool1” and “Cool2”)
Celsius
Gap on which the modulated heat stages
Degrees
increase the output from 0% to 100%
Celsius
« Override time »
Length of the unoccupied setpoint’s bypass.
Seconds
3600
« TimeOut Comm. »
Maximum delay between each writing from
Seconds
0
« Prop. Band »
the master controller. Zero = disable.
« Delay Fan »
Delay between the Cooling / Heating
1.0
1
(Inactive)
Seconds
60
deactivation and the deactivation of the fan.
« Temp. Filter time »
Filter time constant of the temperature.
Seconds
60
« Output Priority »
Priority the CCTHV-407 use to write in the
No Units
12
Seconds
0
Seconds
0
2
BACnet objects.
« Min. time ON »
Minimum operation time of the compressor
once it is running. (Cool1 and Heat2)
« Min. time OFF »
Minimum operation time of the compressor
once it is not running. (Cool1 and Heat2)
W1 Time
Triac W1 period
Seconds
1
W2 Time
Triac W2 period
Seconds
1
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Note:
1. After the delay is expired, the thermostat sees that a problem has
occurred. It changes the value of the BACnet object "Power Limit"
to 100%, it changes the occupancy to “occupy” and change the
value of the BACnet "HVAC Mode" to "Auto".
2. On a temperature changes, this value indicates the time taken by
the system to allow the change to be considered at 63%. 2 times
after that period, the change is considered to 86% and 95% after 3
times this period. This value helps the reading not to vary too
quickly during an abrupt temporary temperature variation.
11.7. Configuration’s Buttons
The "Read Config”, “Save Config", "Load Config", "Clone Config" and "Send
Config" buttons are used to manage the configuration of the "Temperature",
"Outputs", "Input", "Relays" and "Settings" tabs. The "Objects" tab performs
reads and writes in the BACnet objects available directly in the tab. Here are the
different buttons functions:
-
“Read Config”: Re-read the CCTHV-407 configuration.
-
“Save Config”: Write the CCTHV-407 configuration in a file.
-
“Load Config”: Read a configuration from a file.
-
“Send Config”: Send the configuration to the CCTHV-407.
-
“Clone Config”: see next section.
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“Clone Config.” Button
When using the button "Clone Config. "The following interface appears:
Figure 13 – “Clone config.” interface
The configuration defined in the tabs "Temperature", "Outputs", "Input", "Relays"
and "Settings" can be sent to selected thermostats in the column "Selected".
Pressing the column headers will sort the values below. The configuration is sent
to the selected thermostats by pressing the button "Apply" and you can follow the
progress of sending in the column "Progress".
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11.8. System operation
Prop. Band
Hysteresis
Hysteresis
Prop. Band
100%
Heat3 On
Heat2 On
Heat1
50% modulation
50%
Heat4
modulation
Heat3 Off
Heat4 Setpoint
Heat3 Setpoint
Stage Diff.
Stage Diff.
Heat2 Off
Temperature
Heat2 Setpoint
Heat1 Setpoint Central Setpoint
Stage Diff.
Dead band / 2
Figure 14 - Heating schematic
Above is a diagram showing the heating operation. This scheme allows you to
view changes made by each configuration on the system dynamics.
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Diagram showing the operation of the cooling:
Hysteresis
Hysteresis
Cool1 On
Cool1 Off
Central Setpoint
Cool2 On
Cool2 Off
Cool1 Setpoint
Dead band / 2
Temperature
Cool2 Setpoint
Stage Diff.
Figure 15 – Cooling schematic
The "Central Setpoint" value is the setpoint displayed on the thermostat’s LCD
and is changed by the user. The value "Stage Diff” applies a difference between
each configured stage. If a stage is not configured, the upper stages will take the
place of the missing stage. Thus, if the "Heat1” stage is absent, the "Heat2" stage
will take place at the "Heat Setpoint" value, and the "Heat3" stage will move to
the "Heat Setpoint - Stage Diff" value and so on. The same thing happens with
cooling, but the use of a "Cool2" stage when no "Cool1" stage is configured may
seem absurd.
When configuring and using a "Emg. Heat" stage, it is placed at the value
"Setpoint Heat" as the "Heat1” stage.
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12. Dimensions
Figure 16 – CCTHV-407 dimensions
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13. Models
Figure 17 – Blind Thermostat
Figure 18 – Thermostat with a round knob
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14. Hardware specifications

Microcontroller : Freescale MCF51QE128

Communication: RS-485 / BACnet MSTP.

Supply Voltage : 18 – 28 Vac Half Wave

Supply Current : 40 mA typical, 50 mA max

Operating temperature : 10ºC to 45ºC (50ºF to 113ºF)

Storage temperature : -30ºC to 80ºC (-22ºF to 176ºF)
14.1. Outputs

4x Dry contact: 1A @ 24Vac / 30Vdc

2x Triac : fused @ 500mA

1x Analog 0-10Vdc fused @ 5mA
14.2. Inputs

2x Dry contact (with 1 common for both)

1x Analog 0-10Vdc (in 30K impedance)

1x 10K thermistor input
14.3. Jumpers
•
JP1 : 120RS-485 termination.
•
JP2 : Display at 0.1ºC if installed, otherwise at 0.5ºC.
•
JP3 : Enable configuration menu if installed (9).
•
JP4 : Degrees Fahrenheit if installed, otherwise degrees Celsius.
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Legal Disclaimer
Any representation or reproduction, in whole or in part, made without the permission of Cristal
Controls Ltd, is unlawful. Such unlawful representation or reproduction, made by any means,
would be an infringement of copyright punished under the provisions of the copyright law. All
products are registered trademarks of their respective companies.
This product uses portions of code sources from the project « BACnet Stack at SourceForge ».
The original source code can be provided on demand or downloaded on the project’s web site at
the following address : http://bacnet.sourceforge.net.
© Cristal Controls Ltd - All Rights Reserved 1996 - 2016
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2 YEAR LIMITED WARRANTY
CRISTAL CONTROLS warrants to the original user that its products will be free from defects in
materials and workmanship for a period of two years after the date CRISTAL CONTROLS shipped
such products.
If any of CRISTAL CONTROLS’ products is found to be defective in material or workmanship
during the applicable warranty period, CRISTAL CONTROLS' liability shall be limited to the repair
or replacement of the product, or the refund of the purchase price, at CRISTAL CONTROLS’
discretion. CRISTAL CONTROLS shall not be held liable for any costs or expenses, whether direct
or indirect, associated with the installation, removal or re-installation of any defective product.
CRISTAL CONTROLS’ limited warranty shall not be effective unless there is compliance with all
installation and operating instructions furnished by CRISTAL CONTROLS, if the products have
been modified or altered without the written consent of CRISTAL CONTROLS, or if such products
have been subject to accident, misuse, mishandling, tampering, negligence, or improper maintenance.
Any warranty claim must be submitted to CRISTAL CONTROLS in written form within the stated
warranty period.
CRISTAL CONTROLS’ limited warranty is made in lieu of, and CRISTAL CONTROLS disclaims
all other warranties, whether expressed or implied, including but not limited to any implied warranty
of the products.
CRISTAL CONTROLS shall not, under any circumstances, be liable for any direct, indirect,
accidental, special, or consequential damage (including but not limited to loss of profits, revenues, or
business opportunities) or damage or injury to persons or property in any way related to the
manufacture or the use of its products. The exclusion applies regardless of whether such damages are
sought based on breach of warranty, breach of contract, negligence, strict liability in tort, or any other
legal theory, even if CRISTAL CONTROLS was noticed of the possibility of such damages.
By purchasing CRISTAL CONTROLS’ products, the purchaser agrees to the terms and conditions of
this limited warranty.
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