Slant-Fin 21 User Manual

Residential • Gas-Fired • Hot Water Boilers

®

WELCOME TO OUR VALUED CUSTOMER

You are now the owner of a Slant/Fin Concept 21
gas-fired boiler, another quality heating product
designed and manufactured by an industry leader,
to provide your family with many years of reliable
comfort and trouble-free performance.

The care and maintenance of your new boiler is
important to prevent a hazardous condition which
might result from lack of proper servicing.
Therefore, you should perform regular “owner”
inspections as described in this manual (and report
any concerns to a qualified service technician) as
well as have your boiler serviced by a qualified
service technician at least once a year, preferably
before the beginning of each heating season.

LIGHTING INSTRUCTIONS

Locate, read and then follow the procedures on the
lighting instructions label attached to the boiler.For
reference, we have reproduced those instructions
in this manual. A part number is pr inted in the
lower right corner of the label; use this part number
to find your particular lighting reference located at
the rear of this manual.

CONCEPT 21

USER’S INFORMATION

MANUAL

For your safety, before operating

this boiler, read this manual

WARNING: If the information in this
manual is not followed exactly, a fire
or explosion may result causing
property damage, personal injury or
loss of life.

- DO NOT store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.

- WHAT TO DO IF YOU SMELL GAS

•DO NOT try to light any appliance.

•DO NOT touch any electrical switch;

DO NOT use any phone in your
building.

• Immediately call your gas supplier

from a neighbor’s phone. Follow the
gas supplier’s instructions.

•If you cannot reach your gas suppli-

er, call the fire department.

- Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.

This manual must be left with owner, hung
on or adjacent to the boiler. Owner should
retain manual for future reference.

PUBLICATION CB-UIM

Part No. 66-1002

Printed in U.S.A. 499

CONCEPT 21

2

Your boiler must be installed, serviced and repaired
by a qualified service technician only. Owner must
not attempt to install, service or repair this boiler.

Should overheating occur or the gas supply fail to
shut off, DO NOT turn off or disconnect the
electrical supply to the pump. Instead, shut off the
gas supply at a location external to the appliance.

DO NOT use this boiler if any part has been
underwater. Immediately call a qualified service
technician to inspect the boiler and to replace any
part of the control system and any gas control
which has been underwater.

DO NOT attempt to add water to boiler or system.

An automatic water feed should have been installed
(based on local codes) to maintain proper water
level; ask your installer if this device was installed.

Keep boiler area clear and free from combustible
materials, gasoline and other flammable vapors and
liquids.

DO NOT store anything against the boiler or let
anything accumulate in area surrounding the boiler.

DO NOT allow anything to accumulate around or
block air flow at outside vent terminal (i.e. leaves,
shrubs, snow).

For closet installations, DO NOT allow anything to
block air flow at closet ventilation air openings.

DO NOT use water from heating system for cleaning
or any other use.

DO NOT place clothing on the boiler or venting
system to dry.

At least once each month during the heating season,
perform the following inspections:

Check vent tubing:

Look for leakage at joints and sagging
of vent tubing runs. If evident, call a qualified service
technician.

Check vent terminal (outside):
Look for and remove any
obstructions (i.e. leaves, shrubs,
snow).

Check water piping: Look for
leaks around boiler and at all
joints. If evident, call a qualified
service technician.

Check system water pressure:
The temperature/pressure gage
indicates the pressure in the boiler
for each water temperature. For
most installations, it should
indicate about 12 psi to 15 psi for
70° to 100° water temperatures
and from 15 psi to 25 psi for
temperatures up to 240°. Ask your
installer or service technician to
explain and show you what
normal pressures to look for.
If pressure decreases from
normal, the system is losing
water; if pressure increases from

normal, the boiler relief valve will open to relieve pressure
(water will be evident on floor below relief valve discharge
piping). In either case, call a qualified service technician.

Check condensate drain and drain trap: Periodic
inspection should be made of this assembly for
deterioration of the tubing and to insure that the trap is
not plugged. If it is plugged or appears to have excessive
sediment in it, it should be removed from the drain
assembly, straightened out to clear the obstruction,
reformed, filled with water and reinstalled as before.

IMPORTANT SAFETY

INFORMATION FOR YOU

TAKING CARE

OF Y OUR BOILER

SECONDARY

RELIEF
VALVE

AUTOMATIC
AIR VENT

CIRC.
PUMP

WATER PRESSURE/
TEMPERATURE GAGE

24 V TRANSFORMER

ELECTRICAL JUNCTION
BOX

HOT SURFACE IGNITOR
AND FLAME SENSOR

BURNER
ENCLOSURE

PRESSURE SWITCH
LOW SIDE TUBING

GAS
VALVE

HIGH LIMIT
(OPTIONAL)

WATER
SUPPLY
MANIFOLD

WATER
HIGH
LIMIT

GAS VALVE
BIAS TUBING

ELECTRONIC
BOILER
CONTROL

DIAGNOSTIC
INDICATOR
LIGHTS

AIR FILTER BOX

PRESSURE
SWITCH

PRESSURE SWITCH
HIGH SIDE TUBING

AIR AND GAS
ORIFICE PLATE

COMBUSTION BLOWER