Modulating temperature regulating unit for heating and ... - Caleffi

Modulating temperature regulating unit
for heating and cooling
with distribution kit for primary circuit
171 series
Product range
Function
The temperature regulating unit with the distribution kit for the primary
circuit is made to be used in mixed systems: radiant panels and
radiators or fan coils, in combination with distribution manifolds for
radiant panels.
The modulating temperature regulating unit, comprehensive of
digital temperature regulator, controls the temperature of the
medium sent to the panels according to the actual thermal load.
In this particular series, the temperature is regulated by a dedicated
hydraulic unit equipped with a specific motorised three-way valve.
The function of the kit is to distribute a portion of the medium
flowing from the primary boiler circuit to the heating or cooling
elements.
It is supplied with manifolds with built-in shut-off and balacing
valves and a differential by-pass kit for the primary circuit. This
accessory is essential when there is a primary circuit circulation
pump and the radiator circuits or fan coils are controlled by
thermostatic or thermo-electric valves.
Patent application No. MI2006A 001935.
Reference Documentation
- Tech. brochure 01144 Pre-assembled distribution manifolds for
radiant panel systems 668...S1 series
Code 1715.2 003 Modulating regulating unit for heating and cooling with distribution kit for primary circuit, with UPS 25-60 pump
Code 1715.4 003 Modulating regulating unit for heating and cooling with distribution kit for primary circuit, with UPS 25-80 pump
Technical specifications
Materials
Regulating unit with motorised three-way valve
Body: brass EN 1982 CB753S
Headwork: brass EN 12164 CW614N
Obturator: stainless steel
Seals:
Flow adapter unit
EPDM
Body:
Primary circuit by-pass kit
brass EN 1982 CB753S
Body: brass EN 1982 CB753S
By-pass valve: POM
Spring:
Shut-off valves
stainless steel
Body: brass EN 12165 CW617N
Ball: brass EN 12164 CW614N, chrome plated
Primary circuit distribution manifolds
Flow manifold
Body:
Flow rate regulating valve
brass EN 1982 CB753S
Obturator: brass EN 12164 CW614N
Hydraulic seals:
Return manifold
EPDM
Body:
Shut-off valve
brass EN 1982 CB753S
Stem: stainless steel
Obturator and seals: EPDM
Springs: stainless steel
Control knob: ABS
REGI STERED BSI EN ISO 9001:2000
Performance
CALEFFI
01154/07 GB
Medium: water, glycol solutions
Max. percentage of glycol: 30%
Control temperature range: 7–78°C
Primary inlet temperature range: 5–100°C
Max. working pressure: 10 bar
Panel manifolds differential by-pass setting: 25 kPa (2.500 mm w.g.)
Primary circuit differential by-pass setting: 10 kPa (1.000 mm w.g.)
Primary circuit manifold inside diameter: Ø 27 mm
Temperature gauge scale: 0–80°C
Pressure gauge scale: 0–10 bar
Connections: - primary circuit: 3/4” M
- to regulating unit: 1” F with nut
- panel circuit outlets: 3/4” M - Ø 18 mm
- outlet centre distance: 50 mm
- primary circuit manifold outlets: 3/4” M - Ø 18 mm
- outlet centre distance: 50 mm
Panel circuit differential by-pass graph
Δp (mm w.g.)
5000
2000
4500
4000
3500
3000
2500
0,1
Cert. n° FM 21654
2
0,2
5
UNI EN ISO 9001:2000
Cert. n° 0003
0,5
10
1
20
Δp (kPa)
50
45
2
40
35
30
25
20
Flow rate
(l/min) (m3/h)

Digital controller
Three-point type
Electric supply: 230 V - 50 Hz
Power consumption: 3 VA
Protection class: IP 40
Actuator
Three-point type
Electric supply: 230 V - 50 Hz
Operating time: 50 s (rotation 120°)
Power consumption: 8 VA
Auxiliary micro contact rating: 0,8 A
Protection class: IP 44
Max. ambient temperature: 55°C
Protective cover: self-extinguishing VO
Flow/return temperature probes
NTC type
Working range: -10–125°C
Time constant: 2,5 s
Response: 10.000 Ω at 25°C
Two-wire cable with 1/8” M connection
Safety thermostat
Factory set: 55°C ±3°C
Protection class: IP 55
Contacts rating: 10 A / 240 V
Pump
Three-speed pump: model UPS 25-60/UPS 25-80
Material: Body: cast iron GG 15/20
Electric supply: 230 V - 50 Hz
Maximum ambient humidity: 95%
Max. ambient temperature: 80°C
Protection class: IP 44
Pump centre distance: 130 mm
Pump connections: 1 1/2” with nut
Dimensions
code
700
270÷410
129 105
CALEFFI
150052
Trasformatore
AC 230V
D E
50Hz
V
3/4”
with ups 25-60 pump
with ups 25-80 pump
Radiator outlets
Panel outlets
A
CALEFFI
150051
Convertitore
AC 24V 50Hz
AC 230V
6(2)A T50
415 50
A
1715E2 003
-
3
5
765
3
2
4
bar
1
5
0 6
CL 2.5
con forme norme ISPESL
40
30 50
20 60
10
70
0 80
°C
40
30 50
20 60
10
70
0 80
°C
1
2
3
4
L/MIN
CAMERA
CALEFFI
1
2
3
4
L/MIN
1715F2 003
-
3
6
815
CALEFF
1
2
3
4
L/MIN
1
2
3
4
L/MIN
HOBBY BAGNO
SOGGIORNO
WC
CALEFFI
5 outlets 8 outlets 12 outlets
SOGGIORNO
1
2
3
4
L/MIN
CALEFFI
800
1715G2 003
-
3
7
865
CAMERA
CALEFF
1
2
3
4
L/MIN
1
2
3
4
L/MIN
Speed
3
2
1
1
2
3
4
L/MIN
HOBBY BAGNO
SOGGIORNO
WC
CALEFFI
1715H2 003
-
3
8
915
Head available at the regulating unit connections
H (m w.g.)
6
5
4
3
2
1
0
0
0,5
Insulation
Material: closed cell expanded PE-X
Thickness: 15 mm
Density: - inner part: 30 kg/m3 - outer part: 50 kg/m3 Thermal conductivity (DIN 52612):
Coefficient of resistance to the diffusion
0°C: 0,038 W/(m·K)
40°C: 0,045 W/(m·K)
of water vapour (DIN 52615): >1300
Working temperature range: 0–100°C
Reaction to fire (DIN 4102): Class B2
1
2
3
4
L/MIN
1
0,40
0,30
0,20
CALEFFI
1
1,5
Power consumption
2
3
I P n
(A) (W) (rpm)
1000
90
65
45
1715I2 003
-
3
9
985
2
UPS 25-60
2,5
G (m 3 /h)
1800
1100
700
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1715L2 003
1715L4 003
3
10
1035
1200
A A 110÷150
1
2
3
4
L/MIN
CAMERA
HOBBY BAGNO
SOGGIORNO
WC
CALEFFI
CAMERA
CALEFF
(kPa)
60
50
40
30
20
10
0
3
H (m w.g.)
(kPa)
8 80
UPS 25-80
7 70
6
5
4
3
2
1
0
0
Speed
CALEFFI
0,5
3
2
1
1
1
1,5
2 3
1,04
0,92
0,63
1715M2 003
1715M4 003
3
11
1085
2
2,5
I P n
(A) (W) (rpm)
245
210
140
3
3,5
G (m 3 /h)
2450
1500
700
1715N2 003
1715N4 003
3
12
1135
60
50
40
30
20
10
0
4

Characteristic components
1 Digital controller for heating and cooling
2 Three-way mixing valve
3 Three-point actuator
4 Three-speed circulation pump UPS 25-60
Three-speed circulation pump UPS 25-80
5 Flow temperature probe
6 Return temperature probe
7 Adjustable drain cock
Hydraulic diagram
BF
1 10
8
4
15
6
2
3
11
BR
BOILER
FLOW
CALEFFI
150052
Trasformatore
15
AC 230V
D E
50Hz
V
BOILER
RETURN
11
RT
T
11
CALEFFI
150051
Convertitore
C
AC 24V 50Hz
AC 230V
6(2)A T50
1
12
12
10
8
9
3
3
2
4
bar
1
5
0 6
7
ST
CL 2.5
conforme norme ISPESL
40
30 50
20 60
10
70
0 80
°C
4
40
30 50
20 60
10
70
0 80
°C
5
13
2
SYSTEM
FLOW
SYSTEM
RETURN
6
8 Safety thermostat
9 Flow and return temperature gauges with pocket
10 Pressure gauge
11 Primary circuit shut-off valves
12 Distribution manifolds with built-in valves for primary circuit
13 Primary circuit differential by-pass kit
14 Max. RH% control probe
15 Max. RH% control components
9
5
9
7
14
9
12
13
14
Flow manifold
equipped with flow
meters and
balacing valves
SF
SR
1
2
3
4
L/MIN
CAMERA
CALEFFI
CAMERA
CALEFFI
1
2
3
4
L/MIN
SOGGIORNO
Return manifold
equipped with
shut-off valves.
SOGGIORNO
T
RT
ST
C
1
2
3
4
L/MIN
WC
WC
Digital controller
Transformer/Convertor
Adjustable drain cock
Temperature gauge
Temperature probe
Humidity % probe
Room thermostat
Safety thermostat
Ball shut-off valve
Motorised three-way valve
Pressure gauge
Pump
CALEFFI
End fittings with
multi-position ball valves,
automatic air vent,
differential by-pass kit
and fill/drain hose connection.
CALEFFI
Differential by-pass

Operating principle
The medium temperature is regulated
by a three-way mixing valve with a
sector obturator comprehensive of an
actuator managed by a specific
digital controller.
The controller receives the signal from
two probes, flow probe on the mixing
valve outlet and probe from the panel
circuit return, and it controls the
movement of the valve.
The flow in the valve is regulated by a
shaped obturator (1) that, by turning,
closes or opens the hot water flow ports
(2) and the water returning ports from
the circuit (3) to adjust the desired flow
temperature.
Even if the secondary circuit thermal
load or the inlet temperature from the
boiler change, the mixing valve
automatically adjusts the flow rates
until it obtains the optimal flow
temperature.
Construction details
Regulating unit body
The valve body, containing the thermal regulating device, is made
out of a single casting with connections to the primary and
secondary circuits. A specific internal channel carries the system
return medium to the regulating valve, making it possible for the unit
to be smaller in size and easy to connect.
Reduced head losses
The three-way mixing valve is equipped with a special obturator acting
on calibrated water orifices. This ensures a high flow rate and a reduced
size, while maintaining accurate temperature control, with no swinging
due to sudden changes in thermal load.
Electrical connections
The actuator is
electrically connected
through an external
plug-socket system with
a protective rubber cap.
This system does not
require opening the lid
to connect the cables.
In this way, replacing
the actuator (should this
ever be necessary) is
particularly easy to do.
Manual opening
By removing the actuator, the valve can be opened-closed manually
by using a screwdriver.
Regulating way - primary inlet
Fully closed Fully open
c l o s e
open
open
c l o s e
1
3
2
PRIMARY
INLET
SECONDARY
FLOW
PRIMARY
RETURN
SECONDARY
RETURN
Flow unit
The flow unit is made out of a single casting with the necessary
ports to connect with the functional components such as the safety
thermostat, temperature gauge, pressure gauge, drain valve and
flow temperature probe.
30
20
10
0
40
°C
50
60
70
80

Distribution and differential by-pass kit for primary circuit
Operation
The distribution and differential by-pass kit for the primary circuit
enables controlling the flow supplied to the heating or cooling
elements connected before the outlet to the panel circuit regulating
unit.
It is composed of distribution manifolds with built-in regulating and
shut-off valves, and the differential by-pass kit for the primary circuit.
Primary circuit distribution manifolds
The distribution manifolds are equipped with:
- flow rate regulating valves built into the flow manifold. In this way
it is possible to set the right flow rate and balance the various
connected circuits.
- shut-off valves built into the return manifold. The same circuits can
be automatically shut off by using the thermo-electric controls.
Δp (mm w.g.)
1000
500
200
100
900
800
700
600
450
400
350
300
250
180
160
140
120
90
80
70
60
50
45
40
35
30
25
20
18
16
14
12
10
0,1
2
0,2
5
Flow rate regulating valve fully open
Shut-off valve
Kv
5,40
4,10
Δp (kPa)
10
Kv 0,01
540
410
Primary circuit by-pass kit
The by-pass kit permits hydraulic separation between the primary and secondary circuits. This hydraulic separation optimizes the operation of
the secondary circuit at the panels thus preventing the influence on the secondary circuit by any primary circuit flow rate variation. In this case,
the flow rate through the respective circuits depends solely on the pump flow rate characteristics, preventing reciprocal influence due to their
coupling in series. Two possible conditions of hydraulic balance are described here. The component is typically sized in order to have the
following working rate:
G primary = G secondary (inlet to the mixing valve) + G heating elements
G primary maximum recommended: 1,5 m 3 /h
0,5
10
- Kv = flow rate in m 3 /h for a loss of head of 1 bar
- Kv 0,01 = flow rate in l/h for a loss of head of 1 kPa
Gp
Primary
1
Gs
Gprimary > Gsecondary
20
Secondary
9
8
7
6
5
4,5
4
3,5
3
2,5
2
1,8
1,6
1,4
1,2
1
0,9
0,8
0,7
0,6
0,5
0,45
0,4
0,35
0,3
0,25
0,2
0,18
0,16
0,14
0,12
0,1
2
Flow rate
(l/min) (m3/h) Hydraulic characteristics of flow rate regulating valve
Kv (m3 Adjustment
position
/h)
2 turns 0,22
3 turns 1,30
4 turns 3,20
5 turns 4,70
F.O. 5,40
Differential valve
The differential valve is used to control the head in the primary
distribution circuit. It aids the flow circulation towards the heating or
cooling elements and limits overpressure if there are thermostatic or
thermo-electric valves.
The differential valve has a fixed setting that cannot be changed.
It is preset to 10 kPa, mean value for the loss of head in the primary
circuit.
Δp (mm w.g.) Δp (kPa)
20
2000
1800
1600
1400
1200
1000
900
800
700
600
500
0,1
2
Gp
Primary
0,2
Kv 0,01 (l/h)
22
130
320
470
540
5
0,5
10
Gprimary < Gsecondary
1
Gs
5 mm
20
Secondary
18
16
14
12
10
9
8
7
6
5
2
Flow rate
(l/min) (m3/h)

Digital regulator
2 7 3 4 8 1
10 11 12 9 6 5
The front panel identifies the following functions:
1) Three-digit LCD indicating: the measured or calculated
temperature and the settings of the delays programmed in the
system.
• Temperature range displayed: 0–99°C with resolution 0,1°C.
2) Regulator On/Off function selector.
3) Mixer on opening: LED on.
4) Mixer on closing: LED on.
5) Selector for setting the flow temperature.
• Temperature range 7–78°C
Factory configuration: - heating: max 50°C
- cooling: min 14°C
6) Return probe selector.
• Probe off: OFF
• Probe on: ON
Factory configuration: ON
7) Pump working (ON): LED on steady.
8) T.S. LED safety temperature. Continuously ON when the limit
signalled by the safety thermostat or by the safety humidostat is
reached. Continuously ON even if the flow/return sensors
malfunction (see flow/return sensor paragraph).
9) Heating/cooling function switch
10) Trimmer for maximum pulse duration on the valve.
Adjustable 0,2–6 s. Factory configuration: 2,5 s.
Pulse value calculation:
Tpulse (s) =
Example:
Tactuator rotation = 120 s
Tpulse = 120/40 = 3 s
Actuator rotation time (s)
40
11) Return probe reading delay time trimmer.
Adjustable 1–360 s. Factory configuration: 20 s.
12) Valve-motor mechanical delay recovery trimmer.
Adjustable 1–30 s. Factory configuration: 13 s.
Operation
The regulator receives the signal from the room thermostat to switch the
pump on and to control the mixing valve.
The regulator acts on the mixing valve following two operating logics,
depending on the state of activation of the return sensor.
Set point regulation: return probe off. Selector 6) OFF.
In this case the flow temperature TM is kept constant at the value set
with the selector 5) in both heating and cooling. This setting is shown
on the display 1).
Modulating regulation: return probe on. Selector 6) ON.
In this case the flow temperature TM is changed according to the
temperature measured by the return probe TR. In this way the actual
thermal efficiency of the slab is kept under control and, as a result,
the room’s thermal load as well. This minimizes the system’s thermal
response times.
TRset = TMset - 35% (TMset - 20°C)
TMcalculated = TMset + (TRset - TR)
Example:
TM set = 40°C
TR set = 40 - 0,35 · (40 - 20) = 33°C
TM calculated = 40 + (33 - TR)
The new value of TM calculated is shown on the display 1) with a
side bar.
At each update of the TM calculated, the TM measured is displayed
for 5 s, thereafter the new TM calculated is shown again.
TM modification stops when TR reaches TRset. The return probe is not active in the cooling function.
Curve correction graph with return probe
TM;TR
(°C)
50
45
40
35
30
25
20
Designed flow
temperature
TM Set
TM Calculated
TM Calculated
50% 100% 150%
➩
TR Set Return temperature
designed
Flow temperature
limit
TM
Flow
temperature
Designed
thermal load %
Display
The three-digit LCD displays the following parameters:
- flow temperature set with selector 5).
After 5 s the measured flow temperature appears.
- measured flow temperature, with return sensor off.
- calculated flow temperature, with return sensor on.
- maximum duration of pulse on the valve, selectable via trimmer 10).
Displayed for 5 s.
- return temperature acquisition delay time, selectable via trimmer 11).
Displayed for 5 s.
- valve-motor mechanical delay recovery, selectable via trimmer 12).
Displayed for 5 s

Back panel
CALEFFI
M 230 V~ 50÷60 Hz
~
μ 5(2) A / 250 V~
1 2 3 4 5 6
1 2 3 4 5 6
L N
SA SR TA TS
230 V~ IN OUT Apre Chiude
13 14 15 16 17 18
On the back panel there are terminals for the electrical connections
of the various components.
Electric supply
1 Electric supply 230 V~ “Live”
2 Electric supply 230 V~ “Neutral”
3 Ground/Earth
Pump command
4 Ground/Earth
5 Pump command 230 V~ “Live”
6 Pump command 230 V~ “Neutral”
Mixer command
7 Valve command for opening
8 Common C
9 Valve command for closing
Auxiliary microswitch
10 Auxiliary output N/O
11 Auxiliary output common C
12 Auxiliary output N/C
Flow/return probe
13 Flow temperature probe
14 Common C
15 Return temperature probe
Ambient thermostat/safety thermostat
16 Contact for ambient thermostat
17 Contact for common C ambient thermostat / Contact for common C
safety thermostat and humidity probe convertor
18 Contact for safety thermostat and humidity probe convertor.
Heating safety thermostat
If the safety thermostat trips, on detecting a higher flow temperature
than the setting, the following state comes into operation: pump OFF,
mixing valve closed. The thermostat contact is N/C; if the connection
fails, the regulator is not on.
Auxiliary microswitch
The regulator is equipped with an auxiliary microswitch that can be
used to control other devices.
Example:
When Heating, to turn the water heater on/off.
N/O contact - Pump stationary - ambient thermostat OFF or safety
thermostat on (water heater off).
N/C contact - Pump on - ambient thermostat ON (water heater on).
When Cooling, to turn the refrigerating unit on/off.
N/O contact - Pump stationary - ambient thermostat OFF or RH%
limit probe on (refrigerating unit off).
N/C contact - Pump on - ambient thermostat ON (refrigerating unit on).
Contact capacity: 5 A (230 V).
Flow/return probe
The flow/return temperature probes are the NTC type. If the probes
detect an ohmic resistance corresponding to short circuiting, the
following operating state comes into operation: pump OFF, mixing
valve closed, LED 8) on steady.
Sensor resistance values table
°C Ω
-20 97.060
-15 72.940
-10 55.319
-5 42.324
0 32.654
5 25.396
°C Ω
10 19.903
15 15.714
20 12.493
25 10.000
30 8.056
35 6.530
13 14
15 16 17 18
°C Ω
40 5.327
45 4.370
50 3.603
55 2.986
60 2.488
65 2.083
7 8 9 10 11 12
7 8 9 10 11 12
°C Ω
70 1.752
75 1.480
80 1.255
85 1.070
90 915
95 787
°C Ω
100 680
105 592
110 517
115 450
120 390
125 340
Flow temperature limit for heating and cooling
The regulator enables selecting the maximum flow temperature for
heating and the minimum flow temperature for cooling. For this
purpose, the regulator base contains specific dipswitches that enable
setting different temperature limits.
Factory configuration: - heating max 50°C
- cooling: min 14°C.
Dipswitch position-temperature limit table
Setting Limit Limit
Dipswitch maximum minimum
0 0 0 50 14
0 0 1 54 13
0 1 0 58 12
0 1 1 62 11
1 0 0 66 10
1 0 1 70 9
1 1 0 74 8
1 1 1 78 7
ON
1 2 3
Position 1
Position 0
Maximum temperature limit for cooling
When cooling, the flow temperature can be selected no higher than
25°C.
Relative humidity control
When using the cooling regulator, it is necessary to use the specific
relative humidity probe. This probe has the task of measuring the
limit of relative humidity so as to prevent condensation in the
cooling slab.
It is set for RH=80 – 85%. On reaching the setting, it triggers the
following operating state: pump ON, mixer closed.
Humidity probe control
At the start of each cooling season, the operating state of the probe
must be checked by placing a moist wad of cotton wool on its
surface; this will cause the mixer to close and the red LED point 8
on the panel front to light up.
Positioning the humidity probe
Depending on the system characteristics, the humidity probe is
located where there is the greatest risk of condensation. It is placed
with the carbon portion upwards, as shown in the following
diagrams.
E
Top side: carbon
Bottom side: housed on the cooling surface
Steps for correctly positioning the max RH%
limit probe.
The probe is secured to the manifold installed in
the zone where you want to check that the relative
humidity RH% cannot exceed the safety values. It
is secured by means of the two clamps, using the
specific holes.
By controlling the following parameters it is
possible to reach the maximum heating power
delivered by the panel.
- Minimum flow temperature, selectable via
selector (5) on front panel.
- Relative humidity RH% limit point, checked with
relative humidity probe.
- Ambient temperature, checked via ambient thermostat
- Temperature and relative humidity of the ambient air, checked via
fan coil or dehumidifier.
Caution: The RH% limit probe is used to prevent any condensation
from forming. In rooms where there is cooling, there must always be
suitable air treatment.
E

Humidity probe connection
230 V
Room
thermostat
RT
Application diagram
We reserve the right to make changes and improvements to the products and related data in this publication, at any time and without prior notice.
CALEFFI
CALEFFI CALEFFI
150052
Trasformatore
D E
V
AC 230V
50Hz
24V
LN ~ ~
Controller
cod. 161000
150051
Convertitore
AC 24V 50Hz
AC 230V
6(2)A T50
24V~
1 2 3 4 5 6
13 14 15 16 17 18
13 14 15 16 17 18
1 2 3 4 5 6
7 8 9 10 11 12
L N
SA SR TA TS
230 V~ IN OUT Open Close
E/I
CALEFFI
150052
150051
Trasformatore
Convertitore
AC 24V 50Hz
AC 230V
AC 230V
D E
50Hz
6(2)A T50
V
CALEFFI
Safety
thermostat
3
2
4
bar
1
5
0 6
c onform en or me
CL 2.5
ISPES L
40
30 50
20 60
10
70
0 80
°C
40
30 50
20 60
10
70
0 80
°C
ST
1
2
3
4 MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
BBY BAGNO
SOGGIORNO
WC
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
L/MIN
L/MIN
L/MIN
L/MIN
L/MIN
CAMERA
HOBBY BAGNO
SOGGIORNO
WC
CALEFFI
CALEFFI
CAMERA
HOBBY BAGNO
SOGGIORNO
WC
CALEFF
1
2
3
4
L/MIN
CALEFFI
Accessories
738107
1 2 3 4 5 6
°C
t1
ON OFF
t1/t2/t3
°C
t2
- t1
t❄
- t2
- t3
0 2 4 6 8 10 12 14 16 18 20 22
CALEFFI
TH
CALEFFI S.P.A. · I · 28010 FONTANETO D’AGOGNA (NO) · S.R. 229, N.25 · TEL. +39 0322 8491 R.A. · FAX +39 0322 863723
· www.caleffi.com · info@caleffi.com ·
© Copyright 2007 Caleffi S.P.A.
Pump
SPECIFICATION SUMMARIES
The humidity probe is connected to the regulator by installing the
transformer and convertor in between.
If you want to monitor various zones at risk of condensation, the
humidity probe must be connected to a suitable interface kit
(transformer, convertor and humidity probe). Up to 12 convertors
plus probes can be connected to a single transformer.
124 x 90 x 21 mm
Three-way valve
Thermostatic valve
Manual valve
738
Chrono-thermostat for ambient,
battery operated.
With self-learning program.
Weekly programmable clock.
With phone programmer.
3 temperature levels + antifreeze.
30 minutes minimum program.
Lockshield
Shut-off valve
Clock
TH Thermostat/Humidostat
Code 1715.. 003
Modulating temperature regulating unit for heating and cooling with distribution kit for primary circuit. Connections to the primary circuit
3/4” M. Connections to the regulating unit 1” F with nut. Panel circuit outlet connections 3/4” M - Ø 18 mm. Primary circuit manifold outlet
connections 3/4” M - Ø 18 mm. Medium: water and glycol solutions; Maximum percentage of glycol 30%. Control temperature range
7–78°C. Maximum temperature at primary circuit inlet 100°C. Maximum working pressure 10 bar. Panel manifolds differential by-pass setting
25 kPa. Primary circuit differential by-pass setting 10 kPa. Temperature gauge scale 0–80°C. Pressure gauge scale 0–10 bar. Complete with:
flow manifold for panel system with 5 outlets (from 5 to 12) with brass body, flow rate regulating valve with flow meter with a scale of
1–5 l/min; return manifold for panel system with 5 outlets (from 5 to 12) with brass body, shut-off valve. Regulating unit with motorised
three-way valve, three-point actuator, electric supply 230 V - 50 Hz, protection class IP 44. Digital controller, electric supply 230 V - 50 Hz,
comprehensive of probes measuring temperature of flow, return and relative humidity. Flow adapter unit with brass body. Primary circuit
distribution manifolds with 3 outlets, brass body, flow rate regulating and shut-off valves. By-pass kit with brass body, POM differential
by-pass valve and stainless steel spring. Shut-off valves with brass body and chrome plated brass ball. Safety thermostat: factory setting
55°C ± 3°C, protection class IP 55, contact rating 10 A / 240 V. Three-speed circulation pump UPS 25-60 (and UPS 25-80), protection class
IP 44. Pre-formed PE-X shell insulation for primary circuit. Supplied preassembled in a painted plate box with lock, depth adjustable from
110 to 150 mm, including floor supports adjustable in height from 270 to 410 mm.
Code
TA