Doc No. 700070 Page 34 of 56
The end vent vacuum is measured by removing the
protection cap on the tee piece in the air impulse line on
the end vent burner and connecting a manometer.
3.4 Inverter Driven Modulating Fans
(B80, B160, B300 with Schneider inverter)
The use of an inverter allows the end vent suction to be
adjusted by varying the output speed of the inverter within
the local relay unit. This is achieved via a 0-10Vdc input
direct to the inverter via an external control.
NOTE: Ensure the modulation input setting in the inverter
functions has been adjusted accordingly.
3.4.1 Press the mode button 3 times until ‘ConF’ appears on
the display.
3.4.2 Press the jog dial to enter. Rotate jog dial until ‘A I It’ is
displayed. Press jog dial to enter.
3.4.3 Rotate jog dial until ‘IOU’ is displayed. Press jog dial to
enter, causing the inverter to accept 0-10Vdc.
3.4.4 Ensure that electrical supply to the end vent modules
and burners in each branch are connected.
3.4.5 Check that the fan and branch dampers are fully open
and secure.
3.4.6 Ensure the controller is in a programmed ON function
and above the actual room temperature.
3.4.7 After a 30s delay the fan should run and the inverter
should be showing the motor frequency in the display.
3.4.8 Press the mode button 3 times until ‘ConF’ appears on
the display.
3.4.9 Press the jog dial to enter. Rotate jog dial until ‘HSP’ is
displayed. Press jog dial to enter.
3.4.10 Rotate jog dial to adjust frequency. Press jog dial to
enter new value, causing the inverter to change its speed.
3.4.11 Adjust the frequency until each burner has lit.
Frequency is usually between 35 and 50 (Hz)
3.4.12 Press the ESC button twice to return the inverter to
the ’rdY’ display.
3.4.13 Remove heat demand from the system and allow fan
to halt.
3.4.14 Return heat demand to system. After a 30s delay the
fan should run and a red neon should have illuminated on
the rear of each burner.
3.4.15 If the dip-switches have been set correctly, the burner
closest to the manifold (last on branch) should ignite first
followed in order by every burner towards the end vent
burner.
Note: It may be necessary to temporarily break the
union at a burner in order to purge the gas pipe of air.
3.4.16 Observe the ignition of ALL the burners. An amber
neon should illuminate on the rear of the burner when the
burner is lighting and remain if the burner has lit. If the
burner fails to light, the amber neon will extinguish
leaving only the red neon illuminated.
3.4.17 When the branch has been running for 30 min-
utes, check the end vent vacuum reading at the burner
FURTHEST AWAY
.
Re-adjust the frequency on the inverter as follows:
3.4.18 Press the mode button 3 times until ‘ConF’ appears
on the display. Press the jog dial to enter.
