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INSTAllATION
4.6
Hydraulic connection
According to EN 12828:2003, the following safety-techni-
cal equipment is integrated into the boiler:
•
Minimum pressure limiter DBmin
• Safety maximum pressure limiter DBmax
• Water pressure measuring device DBmax + 50%
• Temperature controller
• Temperature measurement device TBmax + 20%
• Safety temperature limiter
Additional safety equipment may be required depending
on the plant configuration.
•
Make sure the return is connected correctly
so as to achieve optimum efficiency.
• To prevent noise emissions, connect the
flow and return lines to the heating circuit
with flexible compensators.
• If a common return is to be used, use the
low-temperature return.
Low-temperature return
(e.g. underfloor heating)
High-temperature return
(e.g. fan group or calorifier)
Fig. 35
4.6.1 To be observed on site
A pressure expansion tank is to be installed appropriate
for the heating system, water volume and hydrostatic
pressure.
4.6.2 Hydraulic integration
A mixer must be installed when combining a calorifier with
underfloor heating.
Installation of a boiler circuit pump:
For operating temperatures of the boiler above 85 °C, af-
ter each burner switch-off, the boiler circuit pump must be
in operation for at least 2 minutes (the pump after-run is
included in the boiler controller with TopTronic E control).
Summary of Contents for 51-UltraGas 2 1000
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