Dual Sensing Dial Thermostat Instructions

Dual Sensing Dial Thermostat Instructions
DUAL SENSING DIAL THERMOSTAT
PRODUCT INSTRUCTIONS
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Construction
Automotive
Industry
SCOPE
ABOUT DUAL SENSING DIAL THERMOSTATS
This guide gives instruction regarding REHAU Dual Sensing Dial
Thermostat installation and operation. Thermostats may only be
installed, calibrated and maintained by an appropriately trained
installer of radiant systems. The installer should also have a basic
understanding of electrical wiring and electronic controls.
This 3-wire thermostat display includes a straight-forward dial control
with a red LED light that illuminates when there is a call for heat. With
the optional floor sensor, this thermostat can regulate either the floor
or the room temperature. The optional floor sensor can also be used
as a floor temperature limiter (high or low) in combination with the
internal ambient air sensor.
A “Selector Mode” switch on the thermostat allows the user to select
a night reduction mode which automatically reduces the temperature
by 7°F (4°C).
Dual Sensing Dial Thermostats are used for controlling up to 4 manifold valve actuators either independently or when used with REHAU
electronic controls. The thermostats may also be used to control relays
and other low voltage controls.
Components
Each thermostat (Art. No. 236477-001) comes complete with:
– Installation instructions
– °F and °C dials
– Mounting template
In addition, you will need:
– 10K floor sensor, where applicable
– Needle nose pliers
– No. 1 Phillips head screw driver
– 1/8 in. flat head screw driver
– Mounting screws (typical for drywall installation)
– Drill
– Pencil
– Level
2
Table 1: Thermostat Technical Specifications
Control
Material
Dimensions (H x W x D)
Measured temperature precision
Packaged weight
Floor limiting temperature range
Ambient conditions (indoor use only)
Electrical protection class
Power supply
Output
Optional floor sensor
Wire type
Microprocessor control
White PVC plastic
3 1/4 x 3 1/4 x 1 in. (80 x 80 x 27 mm)
0.1°C (0.2°F)
0.23 lb (84.4 g)
50 to 104°F (10 to 40°C)
32 to 122°F (0 to 50°C), < 90% RH non-condensing
Class II – IP30
24 V ±10% 60 Hz 15 W max
TRIAC output 24 VAC, 15W max (typical – 4 actuators)
NTC thermistor, 10k Ohms, 10 ft (3 m) cable (Art. 236497-001)
Minimum of three conductor thermostat wires (18-24 AWG),
four or eight conductor thermostat wires are recommended
REHAU Dual Sensing Thermostat
Art. No. 236477-001
120V (ac)
24V (ac)
24V (ac)
Class II
Transformer
Contact closure
from thermostat
Sensor
C C R W A/B
To 10k floor sensor
Sensors
Low voltage
Line voltage
Fig. 1: Wiring diagram for operation without actuator
3
REHAU Dual Sensing Thermostat
Art. No. 236477-001
Zone actuator
4 actuators max.
A
End switch to signal
pump or boiler
120V (ac)
Sensor
C C R W A/B
24V (ac)
24V (ac)
Class II
Transformer
To 10k floor sensor
Sensors
Low voltage
Line voltage
Fig. 2: Wiring diagram for operation with actuator
SETTING UP THE THERMOSTAT
It is easiest to set-up the thermostat before mounting.
1. Remove the dial (6) and the inner sleeve assembly (5).
2. Remove cover (1) with a No. 1 Phillips screw driver.
1
2
4
1 Thermostat cover
2 LED indicator
3 Temperature selector
4 Notch
3
5 Inner sleeve
6 Dial
5
6
68°F
°F
77
59°F
86°F
F
4
41°F
50°
Fig. 3: Thermostat set-up diagram
3. Locate DIP switches.
DIP switches
This thermostat has four DIP switches which allow for limited
programming and system configuration.
DIP
ON
1
Settings for the DIP switches include:
– Setting actuator operation
– “On / Off” or pulse width modulation logic
– Room and floor sensing operation
10
20
40
30
2
3
4
Floor
limitation
25
30
20
C CRW
A/B
15
5
Sensor
10
Fig. 4: Location of DIP switches
4. Set DIP Switch 1: Actuator operation
ON
DIP
ON
DIP
ON
DIP
ON
1
DIP
3 4
ON
1
DIP
3 4
Note: Dark box indicates DIP switch position
ON being used. Set
DIPDIP
DIP Switch 1 indicates the type of actuator
Switch 1 to the up position if a normally1 closed2 (NC)3actuator
4 is used.
For example, REHAU PRO-BALANCE® actuators are normally closed.
If a normally open (NO) actuator is used, set the DIP switch to the
1ON 2 3 4DIP
down position.
5. Set DIP Switch 2: Thermostat
ON
DIP
DIP Switch 2 determines the Heat “On /1Off” or2pulse3width 4
2
1ON 2
3
4DIP
ON
ON1
DIP
3 DIP4
2
ON
1
1
2
2
3
3
ON
1
ON
2
DIP
3 4
DIP
1
2
3
2
1ON 2
ON
1
ON
4DIP
3
2
DIP
3 4
DIP
ON
modulation logic.
DIP
If you want to use the thermostat as aON
simple
1 2on/off3switch4to
regulate the desired room temperature, set the DIP switch to the
up position. This setting is typical for low mass radiant panel systems
or fast responding installations suchON
as fan coils and radiators.
DIP
1
2
3
4
Alternatively, if you want to use the use the thermostat’s pulse width
modulation (PWM) logic, set the DIP switch to the down position.
The thermostat monitors the setpoint as well as the previous heating
3 providing
4 more
cycles to anticipate the response time1of the2system,
effective regulation of the room temperature to the desired thermostat
setpoint. This setting is typical for high mass radiant panel systems,
which respond more slowly.
1
ON
2
3
DIP
4
4
1ON 2
4DIP
3
1
2
3
4
4
1
2
3
4
DIP
ON
4
1
1 2 3 4
ON
DIP
1 2 3 4
ON
DIP
O
DIP
5
1
2
3
4
11
1 sensing
2 3operation
4
6. Set DIP Switches 3 and 4: Room and floor
Room Air Sensing Only Operation
With DIP Switches 3DIP
and 4 in the down position,
ON the thermostat
DIP
ON
ONprovides room airDIP
sensing operation only.
ON
DIP
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
Floor Sensing Only Operation
ON DIP Switch 4 in DIP
ON
With DIP Switch 3 DIP
in the down position and
the up
the floor temperature
ON
DIPwith
ONposition, the thermostat
DIP will only senseON
DIP
the optional floor sensor.
Note: Floor sensing only operation can over heat or under heat the
1space.2
1
2
3
3
1
4
4
11
2
22
3
33
4
44
Room Air Sensing With Floor Lower Limit
ON4 in the down position,
DIP
3 in the up position and
ON With DIP SwitchDIP
the thermostat will sense room air temperature
and
will
use
the
ON
DIP
optional floor sensor to ensure the floor does not go below a
preset temperature.
1
2
3
4
1
1
2 3
2 3
4
4
Room Air Sensing With Floor Upper Limit
ON the thermostat
DIPwill
With DIP Switches 3 and 4 in the up position,
sense room air temperature and will use the optional floor sensor to
ensure the floor does not go above a preset temperature.
1
6
2
3
4
ON
1
22 33
ON
ON
1
1
44
1
DIP
DIP
DIP
ON
2 3 4
2 3 4
2 3 4
ONON
ON
ON
DIP
DIP
DIP
DIP
ON
4
4
1
DIP
ON
4
1
2
3
3
4
DIP
DIP
DIP
DIP
1
2
ON
ON
ON
ON
4
ON
1
2 3
2 3
3
DIP
1
11 22 33 44
1 2 3 4
1 2 3 4
1
1
2
1
2
2
3
3
4
4
DIP
2
3
4
DIP
2
3
4
7. Set the floor limit temperature.
Floor limitation dial
The floor limit sets either low or high temperature limits, depending
on the desired operation.
DIP
ON
1
The floor limit temperature is set by turning the small dial in the
center of the thermostat. Align the arrowhead with the very small
temperatures printed on the circuit board (in degrees Celsius only).
See Table 2 for temperature conversion.
10
20
40
30
2
3
4
Floor
limitation
25
30
C CRW
Table 2: Temperature Conversion
20
A/B
15
5
10
°Farenheit
50
59
68
77
86
95
104
Sensor
°Celcius
10
15
20
25
30
35
40
Fig. 5: Location of floor limit
MOUNTING THE THERMOSTAT
Note: Thermostat must be mounted in the correct location to work
properly.
1. Thermostat should be located 1.5 m (5 ft) above the finished floor.
The thermostat must be installed on an interior wall. Avoid locations in drafts (e.g., staircases, air outlets), behind doors, in direct
sunlight or near other heat sources.
Min. 8 in
(20 cm)
60 in
(1.5 m)
Fig. 6: Locating the thermostat
7
2. Make sure that wire is installed from control location to the desired
thermostat location.
3. Use the mounting template at end of document to help position
the thermostat and drill the mounting holes.
DIP
ON
1
4. Pull wires through access holes for thermostat wiring and floor
sensor wiring (if applicable). Fasten the screws, but do not
completely tighten the screws.
10
20
40
30
2
3
4
Floor
limitation
25
30
Note: Refer to the wiring diagram (Figs. 1 and 2) for your application.
C CRW
20
A/B
15
5
10
Sensor
WARNING: Turn off all power to the wires before connecting wires
to terminals. Failure to turn off power can cause electrocution.
5. Connect the wires to the terminal.
Fig. 7: Installing the thermostat
6. Connect sensor wires to sensor connection.
7. Adjust thermostat with a level and tighten the screws.
8. Do a final check of DIP switches and wiring terminals to ensure
proper installation.
9. Put the cover on the thermostat and secure with Phillips head screw,
using a No. 1 Phillips screw driver.
10. Turn the dial stem completely counterclockwise until it stops.
11. Install the inner sleeve assembly by pushing it in.
12. Select either the °F or °C dial.
13. Install dial, lining up temperature indicator with the lowest setting
on the dial.
8
Thermostat wires:
R = 24 AC
C = Common
W = Contact closure
AB = No wires attached
TROUBLESHOOTING
After setting up and applying power to the thermostat, visually inspect
LED indicator to ensure proper operation.
68°F
59°F
86°F
F
41°F
50°
Message
Call for heat
Internal and external sensors failure
Internal sensor failure
External sensor failure
°F
Interval
None
0.5 seconds
1 second
2 seconds
77
LED Indication
Solid red
Blinking
Blinking
Blinking
LED indicator
Fig. 8: LED indicator
SETTING LOWER AIR LIMIT OF THERMOSTAT
59°F
°F
Note: All pin locations shown are exemplary.
50
°F
68
The thermostat can be limited to a certain temperature range by
physically preventing the user from turning the dials beyond the
set limits.
77°F
F
2. Carefully remove the dial and look at the position of the inner
sleeve. The limit temperature is now lined up with the notch
(see Fig. 10, black dot denotes pin location). To set it, choose
the pin location above the notch.
86°
F
41°
1. To set the lower limit, turn the dial to the desired minimum
temperature (see Fig. 9).
Fig. 9: Turn dial to lower limit setting
3. Remove the inner sleeve assembly being careful not to turn dial
stem, keeping in mind the orientation of the inner sleeve to the
raised notch in thermostat cover.
4. Remove the two pins on the back of the inner sleeve assembly.
41°F
5. Position lower limit so that the pin is above the notch in the cover
and allows the inner sleeve to be reinstalled on the dial stem in the
same position. Be careful not to rotate the dial stem.
°F
50
6. Reposition dial, aligning the arrow with the lower limit temperature.
If done correctly, the dial will not turn below the set lower limit.
59°F
77°F
68
°F
86°F
Fig. 10: Remove dial for lower limit setting
9
SETTING UPPER AIR LIMIT OF THERMOSTAT
1. To set the upper limit, turn the dial to the desired maximum
temperature.
68°F
77
°F
59°F
2. Carefully remove the dial and look at the position of the inner
sleeve. The limit temperature is now lined up with the notch.
To set it, choose the pin location below the notch.
86°F
F
41°F
50°
3. Remove the inner sleeve assembly being careful not to turn dial
stem, keeping in mind the orientation of the inner sleeve to the
raised notch in thermostat cover.
4. Remove the pin on the back of the inner sleeve assembly.
Fig. 11:Turn dial to upper limit setting
5. Position upper limit so that the pin is below the notch in the cover
and allows the inner sleeve to be reinstalled on the dial stem in the
same position. Be careful not to rotate the dial stem.
6. Reposition dial, aligning the arrow with the upper limit temperature.
If done correctly, the dial will not turn above the set upper limit.
°F
59
F
68°
50°F
Calibration is normally not required. If necessary, do the following:
1. Remove the dial from the thermostat.
2. Check the room temperature using another trusted thermometer.
3. Remove the inner sleeve assembly from the dial and insert it
onto the dial stem coming out of the thermostat.
4. Carefully position the dial so that the correct temperature is at
the temperature indicator and rotate the dial accordingly.
5. Push the dial back onto the dial stem.
10
86
°F
CALIBRATING THE THERMOSTAT
41
Fig. 12: Remove dial for upper limit setting
°F
77°F
APPENDIx
MOUNTING TEMPLATE
Clip page and use as mounting template
Thermostat should be located 1.5 m (5 ft) above the finished floor
11
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The information contained herein is believed to be reliable, but no representations, guarantees or warranties of any kind are made as to its accuracy, suitability for particular applications or the results to be obtained therefrom. Before
using, the user will determine suitability of the information for user’s intended use and shall assume all risk and liability in connection therewith.
© 2011 REHAU
www.rehau.com
rehau.mailbox@rehau.com
855.666 04.2011
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