Installation, Start-Up, Adjustment and Maintenance Manual
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MENU 0, 1 and 7 are “Visualization Menu” (data and parameters are read-only). In menu 0 it’s possible to
visualize the unit operation data detected from the electronic control board; In menu 1 it’s possible to real-
time visualize the unit operation data and the unit management. In menu 7 a number will represent the state
of digital Inlet.
MENU 2 is an “Execution Menu”; through this menu it’s possible execute actions like reset ignition control
box and reset errors, as consequence of anomalies detected by the unit. The code will be visualized on the
display of the electronic control board.
MENU 3, 4, 5 e 6 are “Adjustment Menu”, to adjust the contained information. Menu 3 is relative to the end-
user, who can eventually (if allowed) modify the value of parameters; an example are cold water set point
and the water temperature difference setup.
MENU 4, 5 e 6 are only to be managed by Robur Technical Assistance authorized Centers (TAC).
The electronic control board has three fuses for circuit protection. If the electronic control board does not
start up or the condenser fan does not run, remove power from the unit and check the condition of the
fuses. The S61 board requires a 10A (condenser fan) and two 2A fuses (electrical board). The size of the
fuse is labeled on the electronic control board next to the respective fuse holder.
The
maximum
current carrying capacity of th
e N.O. C
ontact is
4A.
Refer to Section 5.2, Pump Wiring.
An isolation relay
MUST
be used to separate the UNIT transformer from additional equipment having a
transformer or damage to the S61 board will occur. Refer to Section 5.3, Control Switch Wiring.
IGNITION CONTROL BOX
When power is supplied to the unit (to the “R” terminal on the ignition control box), ignition control will reset,
perform a self check routine, flash the diagnostic LED, and enter thermostat scan state.
When the control switch is closed, the electronic control board will energize the ignition control box starting
the ignition sequence (24 volts applied to the “W” terminal on the ignition box).
The ignition control box will check the differential air pressure switch for open contacts.
-
If the differential air pressure switch contacts are closed and stay closed for 30 seconds, an
air flow fault will be appear The diagnostic LED on the ignition control box indicates this fault.
In this mode, the ignition control box pre-mixer blower will not start.
If the pressure switch contacts are open, the ignition control box pre-mixer blower will instead start.
-
An air flow fault will occur if the air pressure switch contacts remain opened for 30 seconds
after the pre-mixer blower start. The diagnostic LED on the ignition control box indicates this
fault. In this mode, the ignition control box will keep the pre-mixer blower energized.
If the air pressure switch contacts close after the pre-mixer blower starts (normal operation), a pre-purge
delay begins and the ignition sequence continues.
NOTE
WARNING
WARNING
