Diagnosticspage - RBI FUTERA II Series Installation And Operation Instructions Manual

FUTERA II INSTALLATION AND OPERATION INSTRUCTIONS
Operating Control
The operating control on the water heater is set to its lowest
setting when the water heater leaves the factory. 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.
Instructions To Change Degrees Fahrenheit To Celsius
Press the "P" button once, the display should read "SP".
With display reading SP, press and hold the "P & Up &
Down" buttons simultaneously for more than 5 seconds,
display should indicate "Pb.1". Press the P button (not
holding) several times until "Y.0" is displayed then press and
hold for "P" for 2 seconds. Display should read "C111" press
"P" once to display "C112", using the up / down buttons
select the number that corresponds to measurement unit
and number of decimal points desired.
Note: If you don't enter the confi guration codes (C111,
C112, etc.) thru Y.0 parameter, you will only be able to read
the setting and not change it.
The display unit C or F and the decimal place is determined
by parameter. You can also use this procedure to change
sensor type in an emergency if an exact replacement probe
is not readily available. (C111)
The RBI Digital Temperature Controller has three buttons:
"P", "up" and "down". The controller will display the current
inlet water temperature to the boiler. Press the "P" button
once to enter the adjust menu. From there you can access
these settings:
SP Setpoint or Target Temperature:
The Setpoint is the inlet water temperature that the
operating control will try to match by staging the boiler
between Off, Stage 1 and Stage 2.
D1 Boiler Differential:
The Boiler Differential is centered around the setpoint so
that when the sensor reads 1/2 of D1 below the setpoint,
stage 1 will be energized. When the sensor reads a
temperature 1/2 of D1 above the setpoint, stage will turn
off.
D2 Interstage Differential:
The Interstage Differential is the difference in temperature
between stage 1 being called on, and stage 2 being called
on.
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 II has a number of indicator lights that are
intended to display the current operation and to indicate
any possible problems. The function of each light is listed
below.
On/Off Switch: The toggle switch will illuminate when power
is being supplied to the unit.
Call For Low Fire: This green light will illuminate when there
is a low fi re heat demand either from the RBI Temperature
Controller or a Building Management Control.
Call For High Fire: This green light will illuminate when
there is a high fire heat demand either from the RBI
Temperature Controller or a Building Management Control.
Trial Ignition: This yellow light will illuminate when the pilot
gas valve is energized.
Main Burner: This green light will illuminate when the main
gas valve is energized.
High Limit: This red light will illuminate when the outlet
water temperature has exceeded the setting on the High
Limit control during call for heat.
Low Water: This red light will illuminate when there is not
proper water fl ow during a call for heat.
Low Air Flow: This red light will illuminate when there is
not proper combustion air fl ow during a call for heat.
Flame Failure: Illuminate whenever the ignition control is
unable to establish a pilot fl ame within the trial for ignition
period. This light will also illuminate if the Flame Safeguard
Ignition Control is in lockout for other reasons.
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