Pennco 3KW0.60 - Manual (Page 4)

4
These low pressure oil fired hot water boilers are
constructed and hydrostatically tested for maximum
working pressure of 50 psig (pounds per square inch)
in accordance with the latest revision of the A.S.M.E.
(American Society of Mechanical Engineers) Boiler and
Pressure Vessel Code Section IV Standards for heating
boilers.
Heating Capacity indicates amount of heat available after
subtracting losses up the stack. Most of this remaining
heat is available to heat water. A small portion is heat from
the jacket and boiler surface and it is assumed that this
heat stays in the structure. Net AHRI Rating represents
portion of remaining heat that can be applied to heat
radiation or terminal units (i.e. finned tube baseboard,
cast iron radiators, radiant floor, etc.). Difference between
Heating Capacity and Net AHRI Rating, called piping and
pickup allowance, establishes reserve for heating volume
of water in the system and off-setting heat losses from
system piping. Net AHRI Rating of the boiler selected
should be greater than or equal to calculated peak heating
load (heat loss) for building or area(s) served by the
boiler and associated hot water heating systems. Consult
manufacturer before selecting boiler for installations having
unusual piping and pickup requirements.
Boilers with same number of sections are identical to each
other except for their firing rate. Firing rate is determined
by nozzle size in oil burner. For example: Models
3KW0.60Z, 3KW0.75Z and 3KW1.00Z are the same boiler,
except for firing rate of oil burner.
These boilers operate on #2 Heating Oil. Alternate firing
rate kits are available for 3 section, 4 section and 5 section
boilers.
BOILER RATINGS AND CAPACITIES