Installer reference guide / Mono tank integrated type 67
Overpressure bypass valve
We recommend to install the overpressure bypass valve in the space heating water circuit.
• Mind the minimum water volume when choosing the installation location of the overpressure
bypass valve (at the indoor unit, or at the collector).
•
Mind the minimum flow rate when adjusting the overpressure bypass valve setting.
Pressure relief valve
The MONO Unit does not have a pressure relief valve. The valve shall prevents abnormal water pressure from damaging
the system by opening at 3.0 bar.
A pressure relief valve is integrated on heater vessel of tank integrated hydro unit and shall work in abnormal condition
for protecting the tank integrated hydro unit.
CAUTION
Make sure that the discharged water from the drain pan does not affect other elements.
The pressure relief valve will operate releasing the pressure by flowing out some water through the drain hose.
Make certain that the discharged water out of drain pan can not contact any electrical parts.
The pressure‑relief device is to be operated regularly to remove lime deposits and to verify that it is not
blocked.
How the water heater can be drained.
A discharge pipe connected to the pressure‑relief device is to be installed in a continuously downward
direction and in a frost‑free environment.
Filter/Strainer
Installation of Filter/Strainer is mandatory for water system. The Filter of Strainer shall be located in front of inlet pipe
of PHE. While operating the system, some dust and foreign materials can circulate the system and can make the whole
system not work well due to blockage of heat exchangers and corrosion in some components.
※
Filter mesh : #50
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