4
nozzle and the alternate burner end cone to fire the burners on
these models at the lowest inputs for those models.
For BW4RAH models equipped with Riello burners:
There are two different Riello burners used on the BW4RAH
boilers, the F5 and F10 burner. The BW4RAH000280AAAA is
shipped with one additional nozzles to fire the F10 burner at the
next alternate lower input listed on the rating plate. The
BW4RAH000210AAAA and BW4RAH000140AAAA are
equipped with F5 burners and shipped with two additional
nozzles to fire the boilers at the next lowest inputs listed on the
rating plate.
The BW5B and BW5R models are the same as the BW4B and
BW5B models, except the tankless water heater is factory
installed.
Refer to Tables 1 and 7 (Beckett) or Table 8 (Riello) for
additional oil burner information. Refer to the boiler product data
sheet for the correct accessory low--fire kit.
General Information
Boilers with the same number of sections are identical to each
other except for their firing rate and/or type of burner. The firing
rate is determined by the nozzle size used in the oil burner and the
oil pressure at the nozzle. For example, models BW4RAH091,
BW4RAH105, and BW4RAH140 are the same boiler, without a
tankless coil. They all have a Riello oil burner fired at a different
input rate. Models BW5RAH245 and BW4RAH280 are the same
boiler, with a tankless coil. They both have a Riello oil burner
fired at a different input rate.
1. Check to be sure you have selected the right size boiler
with the proper capacity. The I=B=R rating of the boiler
selected should be greater than or equal to the calculated
peak heating load (heat loss) for the building or area(s)
served by the boiler and associated hot water heating
systems. (See Table 1.) Any heat loss calculations used
should be based on approved methods.
2. Boiler must be supplied with the proper oil supply and oil
piping, sufficient fresh combustion air, and a suitable
electrical supply.
3. Boiler must be connected to a suitable venting system and
a piping system adequate to distribute the heating load.
4. A thermostat must be properly located and installed for
control of the heating system.
If there are any doubts as to the various requirements, check with
local authorities and obtain professional help where needed. The
Operation Instructions, Final Checks and Adjustments and
Maintenance sections in this manual are vital to the proper and
safe operation of the heating system. Take the time to be sure they
are all done.
Locating the Boiler
If boiler is part of a planned heating system, locate it as close as
possible to where it is shown on plan. If boiler is to be part of an
existing system, it is usually best to put it where the old one was.
If location is to be changed, additional materials as well as an
adequate base will be required. The following rules apply:
1. The boiler must be level.
2. Use a raised base if floor can become wet or damp.
3. These boilers must have a non--combustible base if
installed on a combustible floor. Two inch concrete patio
blocks or a 2--in. Cladlite--pad may be used.
4. The vent pipe connection should be as short as possible.
5. Maintain clearances for fire safety as well as servicing.
Refer to Fig. 3 for minimum clearances. An 18--in.
clearance must be maintained at a side where passage is
required to access another side for cleaning, servicing,
inspection, or replacement of any parts that normally may
require such attention. Boilers must be installed at least
6--in. from combustible materials on all sides and above.
Allow at least 24--in. front clearance for servicing. Allow
at least 18--in. right--side clearance for servicing boilers
equipped with a tankless coil.
6. Fresh air for combustion must be available at front of
boiler. Fresh air for ventilation must be available to front
AND rear of boiler. Air passages must be free of
obstructions at all times. Ventilating and combustion air
must enter boiler room without restrictions.
7. Be sure installation is in accordance with the requirements
of local authorities having jurisdiction. Compliance with
these regulations is required. In the absence of local codes,
follow NFPA 31--Installation of Oil Burning Equipment.
INSTALLATION
Installation Requirements
Refer to Fig. 4 for the basic requirements of a typical installation.
NOTE
: Always keep manual fuel supply valve shut off if burner
is shut down for an extended period of time.
Fresh Air for Combustion
;;;;;
;;;;;
;;;;;
24
″
MIN
6
″
6
″
MIN
6
″
MIN
18
″
WITH COIL
BOILER
FRONT
A95592
Fig. 3 -- Minimum Clearance Dimensions
BW
4
/BW
5
