PAGE 22 Reznor, FSE, Installation Manual, EN 2020-02, D301160 Iss H
Flue Discharge Pressure Switch
To stop the operation of the appliance in
case of accidental obstruction of the flue
WARNING
It is mandatory to have a pressure
switch in the flue discharge pipe
connection
For reasons of transport, this device can
be supplied together with the appliance
in a separate package. If it is not already
mounted, proceed with the installation,
following the guidelines given:
• Using the existing self-tapping screw
(2), attach the bracket complete with
differential pressure switch (3) to the
appliance.
• Using the silicon tube supplied with
the device, connect the (+) outlet of
the pressure switch to the flue pipe
connection (4).
• Using the appropriate cable clamps,
fasten the electrical cable (1) to the
appliance.
• Perform electrical connection of the
differential pressure switch to the
contacts of the burner T1-T2
The set-point of flue pressure switch is
pre-adjusted and sealed at the factory.
Before installation, check carefully that it
matches to the appliance on which it will be
mounted.
The position of the silicon tube must be
such as to ensure an inclination between
the pressure switch and the pressure probe
on the flue pipe connection. void“air
pockets” and/or “siphons”.within the
tube as these can prevent the unit from
operating.
When completely assembled, perform a test
of correct operation. Simulate a blocked
flue to activate the differential pressure
switch and verify that the burner shut
down occurs immediately; when the normal
working conditions are restored, the burner
should turn on again.
MAXIMUM CHIMNEY LENGTH
WARNING
The flue exhaust chimney must be
designed and sized by a
competent and qualified
technician.
In any case the loss of load must
be lower than the values shown in
the table below.
Model
Unit FSE 40
FSE 60
FSE 75
FSE100 FSE 145 FSE 175 FSE 225 FSE 300
Set point
mbar
1,1
1.5
1.6
2.0
2.3
4.0
5.0
2.1
Table of the maximum pressure in the chimney:
Model
Unit FSE 40
FSE 60
FSE 75
FSE100 FSE 145 FSE 175 FSE 225 FSE 300
Max Pressure mbar
0.10
0.11
0.18
0.15
0.25
0.30
0.50
0.18
Table of the maximum pressure in the chimney:
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