Atmos
Heating Systems
Installation and user manual EN_FMT
12
1.12. Pump and hydraulic resistance
The pump characteristic and the resistance graph of the
unit are given below.
If set on automatic function (menu setting) the electronics
switches the speed of the pump to “high” or “low”,
depending on the temperature demand:
•
D
t > 30 °C : the pump runs „high speed“.
•
D
t < 10 °C : the pump runs „low speed“.
D
t = Setpoint temperature deducted with the actual Flow
temperature.
1.14. Standards / Guidelines
With the installation of the unit, all local regulations must be
followed, where applicable, including the provisions of the
following standards and guidelines:
•
Building Regulations
•
Regulations for natural gas installations
•
Regulations for LPG (if applicable)
•
Guidelines for existing gas installations
•
Safety requirements for central heating
installations
•
Safety provisions for low voltage installations
•
General regulations for drinking water installations
•
Water authority regulations
•
Ventilation in dwellings
•
Supply of combustion air and exhaust
•
House sewerage in homes and dwellings
•
Fire Brigade regulations
•
Factory Act regulations
•
Regulations applicable to HWS water Ask for the
locally applicable regulations at the local water
company as they are different in some areas
1.15. General safety regulations
The installation may only be performed by a recognised
installer.
Take note that internal parts of the unit can carry a
dangerous electrical voltage (230 Volt).
Take note that the unit, the various pipes and the flue gas
exhausted by the unit can reach high temperatures (up to
90°C).
Before carrying out maintenance activities in or on the unit,
you must close the gas tap, switch off the electricity supply
and pull the mains plug out of the socket.
1.16. Water quality
The composition and quality of the system water has a
direct effect on the performance of the total system and the
life of the boiler heat exchanger. Great care must be used
with the addition and use of chemicals, water softeners,
oxygen binders, de-aerators, aerators and water filters as
they increase the chance of malfunctions.
Corrosive elements of certain additives can attack the
system and cause leakages; the build-up of undesired
deposits generally leads to fatal damage of the heat
exchanger.
0
0,2
0
0,2
0,3
0,6
Flow [m³/h)]
P
ressure [b
ar]
0,7
0,5
0,4
0,1
0,4
0,6
0,8
1,0
1,2
1,4
1,6
1,8
2,0
Pump state high
Pump state low
Boiler resistance
2,2
2,4
2,8
2,6
3,0
0,8
