- 14 -
Required pressures – Table 33. We recommend that the hot water distribution from the heater was as
short as possible to minimise heat losses.
Heaters must be provided with a discharge valve
mounted on the cold service water inlet to the
heater for potential disassembly or repair.
When
assembling the security equipment, follow
Standards.
SAFETY VALVE
STARTING
PRESSURE
[MPa]
ADMISSIBLE
OPERATING
OVER-
PRESSURE OF
WATER
HEATER [MPa]
MAXIMUM
PRESSURE IN
COLD WATER
PIPES [MPa]
0.6
0.6
up to 0.48
0.7
0.7
up to 0.56
1
1
up to 0.8
Table 3
2.4
CONNECTING A HEATER TO A HEATING SYSTEM
The heater is placed on the ground, next to the heating source, or in its vicinity. The heating circuit is
connected to marked inputs and outputs of the heater exchanger; the deaerating valve is mounted in the
highest place. It is necessary to install a filter into the circuit in order to protect the pumps, the three-way
valve, and backflow flaps, and the exchanger from sedimentation. It is recommended to flush the heating
circuit before the assembly. All wiring connections must be properly insulated from heat. If the system
works with priority heating of HSW using a three-way valve, always follow the installation instructions of
the three-way valve’s manufacturer.
An example of a group heater connection for steady hot water consumption from all tanks using
Tichelmann’s method
OV – Heating water
SV – Cold water
C - Circulation
TUV – Hot service water
1 – back pressure valve
2 - Pump
Figure 7
Summary of Contents for 250
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