Janfire NH Burner Service Installation Manual 4.16.09 - Technical specifications are subject to change without prior
notice.
11(38)
4 Boiler Installation
4.1 Boiler Evaluation
Before the burner is installed the following aspects should be considered:
The boiler desired output level
Premium pellet energy density and volume density
Ash container
Ash is collected at the bottom of the boiler without disturbing the flow of flue gases. The boiler convection areas
absorb the heat from the passing flue gases. These areas should periodically be cleaned with a brush. The
MESys 4000 – 6000 boiler is a low pressure hot water boiler and the fire box pressure should be about -10 Pa (-
.04 inches WC) at full fire operation. An adjustable barometric damper must be used to limit draft.
Water volume
The water volume of the boiler bears no great importance. Because a thermal storage or DHW tank with heating
coil is recommended as it will cause the burner to run more effectively with longer combustion periods and fewer
start ups and shut downs.
Manual Reset High limit control and low water cut-off
NOTE: A manual reset high limit temperature control and manual reset low water cut-off must be used as
additional safety controls in addition to the PT-100 burner controller. The manual reset high limit control will shut
down the electrical supply to the burner in case of a high temperature condition. The low water cut-off shuts
down the burner in case of a low water condition.
Combustion Air
The Janfire NH pellet burner requires ample fresh air for combustion to ensure proper operation. Check ventilation
openings for blockages.
Ensure required size of free combustion air opening(s) in sq. ft. to be at least equal to three times the cross
sectional area of the chimney.
IMPORTANT NOTE: Make sure that the boiler room has adequate combustion air and that this space can
NEVER be pulled into a negative pressure condition. Check the following:
- Keep fire place dampers closed at all times to avoid negative pressure.
- Make sure that power venters, exhaust fans, central vac systems and other air moving equipment do
NOT interfere with the pellet burner operation.
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