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Installation Manual
47
● After completing the cleaning work, operate the product to check whether it works properly.
Daily checklist
● Water quality control
- A brazed plate heat exchanger does not have a structure in which any of its parts are
disassemblable, cleanable or replaceable.
- To prevent corrosion or scaling, water quality control is very important.
- At a minimum, the water quality must comply with local or national codes.
- If an anti-corrosion agent and corrosion inhibitor is added, only an agent that does not cause
corrosion on stainless steel or copper should be used.
- We recommend that you drain and refill water in the water piping periodically, even if the
circulation water is not contaminated by ambient air.
● Water flow control
- Insufficient water flow may cause freezing and bursting in the brazed plate heat exchanger.
Make sure that the strainer is not clogged or filled with air, and determine whether the water
flow is sufficient by checking the temperature and pressure differences between the inlet and
outlet pipes of the indoor unit.
- Temperature or pressure difference exceeding an appropriate level indicates reduced water
flow. In this case, you should stop the operation immediately and resolve the causes before
restarting the operation.
(
※
Purging must be performed if air is contained in the water)
Air in the water piping disturbs the circulation of water, causes insufficient water flow and may
cause freezing and bursting.
[Cleaning of brazed plate heat exchanger]
Service valve
Service valve
Drain valve
Strainer
Strainer
Ball valve
(closed)
Ball valve
(closed)
Ball valve
(closed)
Pump
Domestic hot
water pump
Filtering net
PVC hose
Water outlet
Water inlet