Residential Gas Hydronic Heating System
33
33
33
33
QVM 9
Series
Brazed Plate Heat Exchanger-
Brazed Plate Heat Exchanger-
Brazed Plate Heat Exchanger-
Brazed Plate Heat Exchanger-
Service and Maintenance Tips
Service and Maintenance Tips
Service and Maintenance Tips
Service and Maintenance Tips
( DOMESTIC HOTWATER HEAT EXCHANGER )
( DOMESTIC HOTWATER HEAT EXCHANGER )
( DOMESTIC HOTWATER HEAT EXCHANGER )
( DOMESTIC HOTWATER HEAT EXCHANGER )
WATER QUALITY
WATER QUALITY
WATER QUALITY
WATER QUALITY
:::: Water Quality should be maintained at a Ph of 7.4, and not less than 6.0 Ph for
proper heat exchanger life
WATER STRAINER
WATER STRAINER
WATER STRAINER
WATER STRAINER:
:
:
:
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).
CONNECTIONS:
CONNECTIONS:
CONNECTIONS:
CONNECTIONS:
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.
CLEANING:
CLEANING:
CLEANING:
CLEANING:
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.
Heat
Heat
Heat
Heat
Exchanger
Exchanger
Exchanger
Exchanger
Fluid
Fluid
Fluid
Fluid
Circuit
Circuit
Circuit
Circuit
Cleaning
Cleaning
Cleaning
Cleaning
Solution
Solution
Solution
Solution
(Shown removed
(Shown removed
(Shown removed
(Shown removed
from unit)
from unit)
from unit)
from unit)
