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(3) The pressure-relief device is to be operated regularly to remove lime deposits and to verify that it is not
blocked.
(4) The discharge pipe connected to the pressure-relief device is to be installed in a continuously downward
direction and in a frost-free environment.
(5) The appliance is intended to be permanently connected to the water mains and not connected by a hose-
set.
(6) The type of the pressure-relief device is A3J, and this device shall be installed with threaded connection.
(7) The replenishing water pressure in water tank shall be beyond 0.2MPa and below 0.7MPa.
(8) The method of water drainage must be operated strictly abide by the instruction on the label of the water
tank.
16.2 Outline dimension and parameter of water tank
Coil specification
Coil length
Model
Litre
M
N
D (mm)
D1 (mm)
H (mm)
A (mm)
B (mm)
C (mm)
E (mm)
F (mm)
I (mm)
J (mm)
ST-300AF
Enamel coated steel
35
300L
8.7m
12.4m
620
530
1725
209
273
605
396
127
608
232
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