Icma 774-774+940 – Single setting thermostatic angle valve

Thermostatic valves are used to regulate and cut-off the flow of the heat transfer fluid that circulates inside air-conditioning
system terminals (radiators, fan coils, etc.).
Thermostat control devices are used in combination with the thermostatic valves to auto-matically 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.

ICMA thermostat control devices can be installed on all thermostatic valves of this line to convert heating systems with manual operating mode to
automatic operating mode.
To install the thermostat control device, simply replace the thermostatic valve knob with an ICMA thermostat control device. This is done with a few
easy operations. These are described in detail in the paragraph “Thermostat Control Device Installation and Regulation”.
The valves come in “straight” and “angled” versions so that they can be connected to two different types of pipes, at the side of the heating system:
−The valves with GAS thread (side of heating system) are designed for connection to a steel pipe.
−The valves with standard ICMA thread (side of heating system) are designed for connection to a copper pipe, apolyethylene pipe and a multi-layer
polyethylene pipe, for which specific pipe fittings are provided.
Pressure loss can be detected by following the indications provided in the diagrams shown in the paragraph “Fluid Dynamic Characteristics”

Install ICMA thermostatic valves on the heating system making sure to observe the direction of flow. The fluid must enter from the side on which the
valve is connected to the system and go out toward the heating body.
The following problems can occur if the valve is installed incorrectly:
-A noise similar to a continuous sound of heavy hammering is due to the passage of fluid through the valve in thewrong direction. This problem can
only be solved by inverting the valve with holder on radiators that have thisproblem, thus restoring the correct direction of flow of the fluid inside
the valve.
-A noise similar to a sound of heavy whistling during the succession of specified on and off times is due to an excessive flowinside the valve. This
problem can be solved by keeping the system pressure under control, and equipping the system withvariable rotation pumps along with differential
pressure regulators, or by making use of differential by-pass valves.

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, stovetop 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 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”.

Performance
Fluids used: Water, glycol solutions
Max percentage of glycol: 50%
Max operating pressure: 10 Bar
Max differential pressure: 1 Bar (control dev. mounted)
Heat transfer fluid temperat: 5 ÷ 120°C
Valve obturator travel: 3,5 mm
Connection with control devices: 28 x 1,5

Materials
Body, cap and socket union: CW617N Brass – UNI 12165
(Nickel-plated)
Large screw: CW617N Brass – UNI 12164
Spring,obturator control rod: Stainless steel
Liquid sealings: Peroxy EPDM
Control knob: Nylon 6 – 30% Fiberglass
White color

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” (DP=10 KPa) angled-straight: qm N 190 Kg/h
Maximum working temperature: 110°C
Maximum storage temperature: 50°C
Hysteresis: C 0.19 K
Authority: a 0,9
Response time: Z 20 min
Differential pressure influence: D 0,25 K
Water temperature influence: W 0,7 K
Control Accuracy: CA 0,2 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
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