Control Description; Diagnostics - RBI FUTERA III Series HeatNet Installation & Operation Manual

FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS

CONTROL DESCRIPTION

Low Water Cutoff
If the boiler is to be installed above radiation or if required
by other codes or regulations, install a low water cutoff in
appropriate piping. Wire the switch to the "Interlock"
contacts as illustrated on "Field Wiring" schematic. Ensure
that the low water cutoff device(s) will funtion properly.
Operating Control
The preferred control setting for potable hot water is 130°F,
54°C. The operating control should be set to the lowest
setting that will satisfy the consumer's needs.
WARNING: Setting the thermostat or operation
control too high can result in scalding resulting in
severe personal injury!
High Limit (Aquastat)
The high limit is located in the top control area of the boiler/
water heater. A remote capillary bulb is run to a well on
the outlet side of the supply header. The high limit can be
reset by depressing the red button.
The water heater high limit should be set a minimum of
20°F, 11°C higher than the operating control. Refer to the
HOT WATER SUPPLY section for the proper supply water
temperature.
Flow Switch
A fl ow switch is provided in the water outlet piping to
prevent the boiler/water heater from fi ring without adequate
water fl ow through the heat exchanger.

DIAGNOSTICS

The Futera III has a display that indicates the sequence of
operation. The display will also list faults should the unit fail
to operate. An explanation of each status message and fault
can be located in HeatNet Control Manual under status
screen fault display section.
STATUS SCREEN FAULT DISPLAY
There are numerous interlock switches and software
limits that are detected. Each of these, when tripped will
produce a display message, an audible beeping, and
an alarm relay closure. The fault is displayed fi rst, then
after a second, the time the fault occurred is displayed.
This cycle will keep occurring until the fault is cleared.
These faults are:
HIGH LIMIT: When the high limit aquastat trips the
following message is displayed:
FAULT
HIGH LIMIT
FAULT
10/27 9:16
The high limit interlock breaks power to the ignition
control (shutting it off) and effectively removes any
chance of the gas valve receiving power. The FIII series
control will remain powered to display the fault, latch
the alarm relay/audible beeper, and to access the log.
The interlock is located on J5, HIGH LIMIT.
INTERLOCK SPARE 3: This is a reserved interlock
input that is normally jumpered at the factory, but can
have a remote interlock connected as a fi eld install. The
interlock is located on J11A, SPARE 3.
FAULT
INTERLOCK SPARE 3
29
SYSTEM SET
160˚F
SYSTEM SET
160˚F
SYSTEM SET
160˚F