Control Description - RBI 8800 series Installation And Operation Instructions Manual

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CONTROL DESCRIPTION

Boiler Thermostat
If a thermostat is to be used to control the boiler always
follow the instructions included with the thermostat.
Proper location of the thermostat will ensure efficient
trouble-free operation of the boiler. Mount the thermostat
to an inside wall at a height approximately five feet
above the floor.
Avoid placing the thermostat in areas that will not
provide an accurate measurement of the room
temperature. Locating the thermostat behind a door, in
an alcove, close to a source of thermal radiation or in a
drafty area will cause poor or sporadic heating.
For a thermostat that employs an adjustable heat
anticipator, adjust the anticipator to match the current
measured in the thermostat circuit. An increased
anticipator setting may be necessary if the unit cycles
frequently. If the room temperature over-shoots the
thermostat setting, reduce the anticipator setting.
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!
SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
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 black rubber plug
in the front top jacket panel.
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 flow switch is provided in the water outlet piping to
prevent the boiler/water heater from firing without
adequate water flow through the heat exchanger.
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 and
any external controls in series to the "Interlock" contacts
in the junction box (see the attached Connection
Diagrams for details). Ensure that the low water cutoff
device(s) will function properly.