Brazed Plate Heat Exchanger－ Service And Maintenance Tips - Quietside QVM 9-090W1-NG Manual

Brazed Plate Heat Exchanger
Brazed Plate Heat Exchanger -
WATER QUALITY
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WATER STRAINER :
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CONNECTIONS
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CLEANING
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<DOMESTIC HOTWATER HEAT EXCHANGER>
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Water Quality should be maintained at a pH of 7.4, and not less than 6.0 pH for
proper heat exchanger life.
A water strainer MUST be installed in the water inlet circuit the protect the heat
exchanger from restricted flow rate and/or blockage (16-20 mesh minimum, 20-40
mesh best choice).
:
Remove 2 philips head screws holding the pipe flange to the plate heat exchanger
while removing the other end of the heating pipe from its anchor point as well. (some
of these fittings may use 'speed clip' which slide in and out to release the pipe end.)
Grasp pipe and flange and pull away from the plate heat exchanger being careful not
to cause stress to other fittings and connections. Check O-ring on tube ends and
replace if necessary.
:
In some applications the flat plate heat exchanger may be subjected to severe
conditions, including high temperature and/or hard water conditions, causing
accelerated scaling and corrosion rates, which will impede the performance of the
heat exchanger decreasing the delivery of hot water to the home. Because these
factors it is important to establish regular cleaning schedules. The chemical cleaning
process is very simple for cleaning the Quietside Flat Plate Heat Exchanger, which will
extend the life and performance of the heat exchanger.
A 5% solution of Phosphoric Acid or Qxalic Acid may be used. Other type cleaning
solution can be obtain from you local wholesaler. Do not heat acid solution when
back-flushing through heat exchanger. Flush heat exchanger with plenty of fresh
water after cleaning.
Make sure cleaning solution is applicable for stainless steel and copper that directions
are follow as recommended.
- Service and Maintenance Tips
Service and Maintenance Tips
33
QVM 9
Series