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Installation of Outside Unit
8. Water Piping System
8.2 Strainer on water pipe
◆ Water pollution / Partially frozen
Refrigerant
Heat Source
water
◆ Head loss of strainer on water pipe
50
8/10/12/14 HP
* Upper graph is a theoretical value for selection and it may be different according to specification of strainer.
* Application for models could be different in accordance with model line up of target region.
■ To protect the water cooling type product, you must install a strainer with 50 mesh or more on the heat water supply pipe.
If not installed, it can result in damage of heat exchanger by the following situation.
1. Heat water supply within the plate type heat exchanger is composed of multiple small paths.
2. If you do not use a strainer with 50 mesh or more, alien particles can partially block the water paths.
3. When running the heater, the plate type heat exchanger plays the role of the evaporator, and at this time,
the temperature of the coolant side drops to drop the temperature of the heat water supply, which can result in icing point
in the water paths.
4. And as the heating process progresses, the water paths can be partially frozen to lead to damage in plate type heat
exchanger.
5. As a result of the damage of the heat exchanger from the freezing, the coolant side and the heat water source side will
be mixed to make the product unusable.
Pollution of Heat Source
96
ℓ/min
Partially frozen
Damage
50
16/18/20 HP
25
Installation
: Suggestion range
: Allowed range
192
ℓ/min
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