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Hot Water Boiler with Steel Body, Automatic Fuel Feed Operation and Maintenance Manual
nearest point of the boiler inlet and outlet by the shortest vertical path. Horizontal movement is only
allowed at the level of the expansion tank and at minimum length.
ÜNMAK solid fuel boilers must be connected to an installation with an open expansion tank in
accordance with the installation diagram shown below. The circulation pump can be connected to
the return or return line. If the pump is in the boiler return; the open expansion tank must be higher
than the discharge head of the pump.
Warning about the water level:
After the first water is pressed into the system, the minimum water level must be marked on the
hydrometer. Water level should be checked on a daily basis and water should be added to the
installation when it falls below the minimum value.
Adding fresh water to the installation should only be carried out when the installation is
cold.
Expansion tank volumes that must be rated according to the rated boiler capacity
BOILER POWER
(kcal/h)
OPEN EXPANSION
TANK VOLUME (lt)
BOILER POWER
(kcal/h)
OPEN EXPANSION
TANK VOLUME (lt)
25.000
50
400.000
750
34.000
50
420.000
750
45.000
90
450.000
750
60.000
90
480.000
750
80.000
110
500.000
750
100.000
210
510.000
750
120.000
210
540.000
1000
130.000
210
600.000
1000
150.000
210
660.000
1000
160.000
300
700.000
1000
180.000
300
720.000
1000
200.000
300
780.000
1200
210.000
300
800.000
1200
225.000
500
840.000
1300
240.000
500
900.000
1400
250.000
500
1.000.000
1500
270.000
500
1.100.000
1600
300.000
500
1.200.000
1800
330.000
500
1.300.000
2000
350.000
500
1.500.000
2250
360.000
750
2.000.000
2500
390.000
750