Icma 1141 – Double angle valve with thermostatic option

Thermostatic expansion valves are used to regulate and cut-off the fl ow of the heat transfer fl uid that circulates inside air-conditioning system
terminals (radiators, fan coils, etc.).
Thermostat control devices are used in combination with the thermostatic expansion valves to automatically regulate ambient temperature wherever
they are installed, keeping the temperature at a preset value. This avoids the needless wasting of heat and provides a considerable saving of energy.
On all thermostatable valves in our “hydrothermal system” range, our thermostatic controls can be installed, from a first manual operation condition
to automatic operation.
To do this, simply replace the thermostatically controlled control knob with one of our control thermostats, the operations to be performed are
simple and detailed, in detail in the “Installation” section of the thermostat.

Thermostat control devices are used to regulate ambient temperatures automatically wherever they are installed so
that the temperature is kept at a preset value.
Residential and working environments often contain other sources of heat, such as electrical appliances, stove-top
cookers, computers, servers, and simple sunlight. Combined with the heating system, these additional heat sources
cause a needless, uncontrolled increase in ambient temperature and the wasting of heat. Thermostat control devices
detect variations in ambient temperature in the environments in which they are installed making it possible to keep
the heat supplied by the heating system at optimal temperatures and to provide a considerable saving of energy.
The ICMA, 1100, thermostat control device can be installed on all thermostatic expansion valves of this line.
ICMA valves are supplied with the current manual control knob (for manual operation). The valves can be converted
into thermostatic valves that function completely automatically by installing a thermostat control device.
To install the thermostat control device, simply remove the thermostatic expansion valve control knob and replace it
with the 1100 thermostat control device.
This is done with just a few easy operations. These are described in detail in the paragraph “Thermostat Control Device Installation and Regulation”.

The thermostat head is made of a series of plastic parts containing a thermostatic component that is
sensitive to temperature variations. Operation of the thermostatic component is based on the expansion
of the thermostatic liquid contained inside it:
– when the ambient temperature rises, the thermostatic liquid increases in volume, resulting in the
lengthening of the component;
– when the ambient temperature drops, the thermostatic liquid decreases in volume, resulting in the
shortening of the component.
The variations in length of the thermostatic component are transmitted to the expansion valve obturator
by a small steel rod. These movements constantly regulate the fl ow of the heat transfer fl uid to the
heating component so that the temperature set on the thermostat control device remains constant over
time. The thermostat control device components are specially made of plastic materials to prevent the
valve heat and that irradiated by the heating component from being transmitted to the thermostatic
component by contact or induction. This prevents possible malfunctions in the control device

The thermostat control device temperature is regulated by turning the numbered knob and bringing the
corresponding symbol to the desired temperature close to the head indicator (see the following paragraph
for more details).
– Position 3 on the adjustment scale corresponds to an ambient temperature of 20°C. This is the
recommended temperature for ensuring a comfortable environment and reduced heat consumption and
costs.
– The asterisk “*” indicates the freezing protection position. When the thermostat control device is set to
this position, the valve turns on only if the ambient temperature drops below 6°C.
This setting is recommended when one is absent for long period of time during the winter months, or when
one wishes to aerate the premises when outside temperatures are very low.

Performance
Fluids used: Acqua e soluzioni glicolate
Maximum percentage of glycol: 50%
Maximum operating pressure: 10 Bar
Maximum differential pressure: 1 Bar (with con
trol device mounted)
Temperature of heat transfer fluid: 5 ÷ 120°C
Valve obturator travel: 3,5 mm
Connection with thermostat control
devices: M 28 x 1,5

Materials
Body, cap and socket union: CW617N Brass – UNI 12165 –
Nickel-plated
Large screw: Brass CW617N – UNI 12164
Spring and obturator control rod: Stainless steel
Liquid sealings: Peroxy EPDM
Control knob: RAL 9010 ABS White

Performance
Minimum adjustment calibration (anti-freeze position): ts min 7°C (❆)
Maximum adjustment calibration (position): ts max 28°C (5)
Saving condition (position): 20°C (3)
Maximum working pressure: PN 1000 KPa
Maximum differential pressure: Δp 100 KPa
Nominal capacity “qm N” angle-straight: qm N 190 Kg/h
Maximum working temperature: 110°C
Maximum storage temperature: 50°C
Hysteresis: C 0.25 K
Authority: a 0,9
Response time: Z 20 min
Differential pressure influence: D 0,25 K
Water temperature influence: W 0,7 K
Use of the protection cap: 55°≈1K
Connection to thermostatic expansion valves: M28x1,5
Certification: UNI – EN215

Materials
Knob and stop ring: RAL 9010 ABS White / Bright chrome
Body and transmitter: RAL 9010 PA6 30% F.V
Sensor liquid: Thermostatic ethyl-acetate
Connection ring: CW617N Brass – UNI 12164 – Nickel-plated
Compensation pin: CW617N Brass – UNI 12164
Compensation pin spring: SH steel for springs – Phosphated