Pensotti Heatline Quatech Series
19
•
Inspect and clean chimney, and verify it is free of restrictions and obstructions.
•
The chimney connector must always be properly supported.
•
Chimney connectors should be free of as many 90
°
degree turns as possible, and be pitched
upwards towards the vent.
It is important to note that due to the high efficiency of the Pensotti Heatline Quatech Series
boilers condensing temperatures in the chimney connector and venting system may be reached.
If condensing temperatures of below 250
°
F NET are reached in the chimney connector, the
following precautions may have to be taken;
•
Seal all joints in venting system with high temperature silicone or mastic.
•
Verify quality of chimney and liner. If a masonry, brick, or block chimney is used, or the
existing tile liner is in poor condition, a chimney liner suitably rated, and listed for oil may
have to be installed.
Mechanical Draft Applications
When using the Pensotti Heatline Quatech Series boilers in a mechanical draft application the
following basic guidelines should be observed according to the venting system in use. In addition,
it is strongly recommended that the applicable precautions for Natural Draft Applications be used.
For additional information on venting see NFPA211.
Draft Regulator
The Pensotti Heatline Quatech Series boiler does not normally require a barometric damper, but it
may be required when the draft in the venting system is stronger than required, and the burner is
incapable of operating against a high negative over-fire pressure.
Figure 9
Neutral Point Pressure Adjuster
In some cases the chimney may produce draft that is too excessive and beyond the control of a
draft regulator. The burner in use should be a high static or air-box type, and in addition you have
a mechanical draft device at or near the outlet, you may get flame detachment, smoky fires, and
puffbacks.
The best way to correct this is to insure that you do not have more than -.02" of negative water
column draft at the breeching or outlet of the unit.
If you have an excess draft situation, the installation of a "neutral pressure point adjuster", see
Figure 9
will be required.
