Page. 16 of 29
March 2016
Edition 1
PLANAR
17
,7
-0
,0
5
12
,3
-0
,1
8,
6
-0
,0
5
19±0,1
10±0,1
75
R2
1 Материал. Сталь 40ХН ГОСТ 4543-71 и.т.п.
2. НRC 45......50
Ra 1,6
Ra 1,6
Ra
1,6
1.
MATERIAL STEEL 40XH GOST 4543-71 or similar
2.
HRC 45-50
Fig. 6- Mandrel Dimensions.
Attention! The screen should be installed with interference fit until it stops.
If the screen is not properly installed, the heater may malfunction during start-ups.
DO NOT DRIVE SCREEN INTO HOUSING USING BUSHING OR GLOW
PLUG.
5.3 Functions, Removal and Replacement of Overheat Sensor.
5.3.1–Bimetal overheat sensor.
Overheat sensor (Figure 7) is used to control the heating temperature of the heat
exchanger. If heat exchanger temperature exceeds 250°C the heater shuts down. The
overheat sensor requires replacement if the heater shuts down at heat exchanger’s
temperature below 250°C, or for the reasons set out in Table 2.
If you receive the error "Overheating" at starting or during operation, then:
1)
Check the integrity of sensor wire insulation.
2)
Check overheat sensor electrical contacts.
3)
Check the temperature sensor for short circuit. In a cool state (<250°C) the sensor is
closed and reads "short-circuit". If this does not happen, replace the sensor.
4)
Replace the overheat sensor and test the heater. If the heater is operational with
new sensor, the replaced sensor should be considered faulty and disposed.
5)
Check the CU. Connect overheat sensor wires (Figure 7a), start the heater.
-
If there is an error "Overheating" – the CU is faulty. Replace the CU.
-
If the heater is working properly - disconnect the closed wires. The control panel
should display the error "Overheating". If the error does not appear - the CU is
defective. Replace the CU.
Disassembly in accordance with section 4.
