Part 7 - Central heating (CH) and Domestic Hot Water (DHW) circuit
Figure 7.2 Pressure relief valve installation location
Discharge line
CH return pipe
External expansion tank
(See figure 7.6 as well)
Control module
The EcoKing Boiler control module uses temperature sensors to provide both high limit protection and
modulating temperature control. The control module also provides low water protection by sensing the water
pressure of the CH system. Some codes / jurisdictions or insurance companies may require additional external
controls for high limit and / or low water cutoff protection. Especially when the boiler is installed above radiation
level. Follow low water cutoff manufacturer’s instructions.
Backflow preventer
Use a backflow preventer. This valve should be installed on the cold water fill supply line per local codes. Also
make sure that the maximum cold water inlet pressure into the boiler cannot exceed 8 bar (116 Psi).
Warning
To prevent residue build up in the boiler when used in older systems, possible containing dirt it is highly recommended to take
the following actions.
Flush and clean the CH circuit before commissioning the boiler
install an external basket strainer in the CH return pipe
When these actions are not executed, residue from the CH system might cause the boiler to clog and overheat.
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