Maintenance - RBI Series 8800 Installation And Operation Manual

SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
Check the input rate as follows:
1. Turn off all other gas appliances that use the same
gas meter as the boiler/water heater.
2. Call your gas supplier and ask for the heating value
of the gas.
3. Start the boiler/water heater and let it run for 15
minutes.
4. Using the gas meter and a stopwatch, clock the time
that it takes to burn 10 cubic foot of gas and divide
this time by 10.
5. Insert the heating value and the time, in seconds,
into the formula below.
6. Input = (heating value, Btu/hr)(3600)/(time, seconds)
7. If the computed rate deviates by more than 5% from
the rated input value of the unit adjust the manifold
pressure accordingly. DO NOT adjust the manifold
pressure by more than 5%. If a proper rate cannot
be maintained without adjusting the manifold
pressure beyond the 5% limit, the main burner
orifices must be replaced. If the input rate is too low,
go to the next lager size of main burner orifices. If
the input rate is too high, go to the next smaller size.
CAUTION: Never increase the input to the boiler/
water heater above that for which it is rated. Doing
so can cause premature failure of the unit!
Low Water Cutoff
If installed, ensure that the low water cutoff device(s)
function properly. Test in accordance with the
manufacturer's instructions included with the device(s).
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.
Water Heater Operation Controls
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. The operating control should be set to the lowest
setting that will satisfy the consumer's needs. The water
heater high limit should be set a minimum of 40°F
(22°C) higher than the operating control. Refer to the
HOT WATER SUPPLY section for the proper supply
water temperature.
WARNING: Setting the thermostat or operating
control too high can result in scalding resulting
in severe personal injury!
BOILER/WATER HEATER

MAINTENANCE

WARNING: Disconnect electrical power and
close the manual gas shut off valve before
performing maintenance or severe personal
injury may result!
CAUTION: Servicing, inspection and adjustment
must be done by a trained technician in accordance
with all applicable local and national codes.
Improper servicing or adjustment can damage the
boiler /water heater!
The boiler/water heater should be cleaned and
inspected once a year, before each heating season.
Make sure that the burners and ignition components are
free from dust, soot, dirt, corrosion or other deposits that
would impair the boiler's performance. Refer to pages
19 & 27 for component identification.
Combustion Chamber Inspection
1. Remove the left or right lower jacket end panel, item
5 or 24 (8900) or item 5 or 26 (8800).
2. Remove the upper end refractory brackets and
carefully remove the end refractory panel.
3. Inspect the combustion chamber, heat exchanger
and burner tray components for sign of corrosion
and/or deterioration.
4. Clean or replace components are required.
Burner Drawer & Burner Removal
1. Close the manual shutoff valves in the gas supply
lines and turn off electrical power to the boiler/water
heater.
2. Disconnect the gas train from the gas supply piping
at the ground joint union, Figure 9.
3. Remove the Flame Roll-Out Shield, 8900 only.
4. Remove the two bolts that attach the burner drawer
to the base frame.
5. Disconnect the pilot tubing from the solenoid valve
and the ignition lead from the ignition control.
Page 17