41
THERMAL PROTECTION
5067
SYR/092005/HUSTY/KAR
TA
unspecified dimensions, as mm
Applications:
Thermal protection device 5067 for the system is used to protect solid fuel boilers operated in heating systems equipped with thermostatic valves,
in accordance with the Polish Standard PN-EN303-5. Recommended in particular for boilers not equipped with a cooling exchanger.
Fig. 1 presents a principle for its installation, in the boiler vicinity, paying particular attention to duct routing and dimensioning, to prevent any
pressure losses.
Installation and principle for operation:
The thermal protection valve 5067 consists of the following components: check valve (1); pressure
reducer (2); thermally-controlled filling (3) and discharge (4) valves; and temperature sensor with a capillary tubing (5). The reducer (2) is connec-
ted to the water supply system, while the outlet of the thermally-controlled filling valve (3) is connected to the boiler return valve. The water supply
duct is connected to the inlet of the thermally-controlled discharge valve (4), which outlet is routed to the drain. The temperature sensor is installed
in the warmest place, possibly in the upper part of the boiler. The pressure reducing valve is permanently set to 1.2 bar, therefore, the working
pressure in the heating equipment should be higher by 0.2–0.3 bar. These settings prevent opening of the pressure relief valve in the system. Use
of the pressure relief valve set to at least 2 bar is recommended. When the set opening temperature, ca. 90oC, is exceeded, the filling valve (3)
starts to open. To maintain a stable pressure in the heating system, the discharge valve opens at 97oC. When the discharge valve is open, hot
water flows out of the heating system, and cold water can flow from the supply duct, cooling the boiler. When the boiler temperature drops to 94oC,
the discharge valve closes. With the thermally-controlled filling valve and the temperature sensor, a required flow pressure in the heating system
is restored. When the water temperature in the boiler reaches 88oC, the filling valve also closes.
Design:
The thermally-controlled protective device is controlled by two independent valves: filling and discharge. The device body is made of
pressed brass, other components in touch with water are made of stainless steel and heat resistant plastic. All sealing components are made of
flexible, heat and wear resistant material – elastomer. Springs are made of stainless spring steel. The sensor and the capillary tube are made of
copper, where the tube is additionally nickel plated. The valve opening is controlled with a double temperature sensor. The fittings are vented
automatically. The valve components, seat and sealing, can be dismantled and cleaned without changing the set opening temperature. A compact
heat of the temperature sensor can be dismantled to facilitate installation of the valve body. The capillary tube leading from the sensor to the
actuator is protected with a special flexible hose.
Operating pressure for the pressure reducer:
1.2 bar (factory blocked)
Maximum input water pressure:
16 bar
Minimum required input water pressure:
2.3 bar
Temperature
opening:
closing:
filling valve
90°C +0/-2°C 88°C +0/-2°C
discharge valve
97°C +0/-2°C 94°C +0/-2°C
Maximum working temperature
135°C
Capillary tube
1300 mm - standard length
Weight
1.5 kg
rys.1
HANS SASSERATH & CO. KG - HUSTY
ul. Rzepakowa 5e, 31-989 Kraków, tel. 012/645-03-04, fax 012/645-03-33, e-mail: [email protected] www.syr.pl
