York | 90 | Diamond 90 High Efficiency Gas Furnace

650.75-O3Y (796)
035-14109
®
D IAMON
D
90
®
MODEL P3UR
USER’S
INFORMATION
MANUAL
HIGH EFFICIENCY GAS FIRED FURNACES
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 supplier, call the fire
department.
– Installation and service must be performed by a
qualified installer, service agency or the
gas supplier.
Congratulations . . .
On your purchase of one of the most versatile furnaces available in the industry today. This compact, energy-efficient
furnace has been precision designed, manufactured of high-quality materials and has passed many rigorous inspections
and tests to ensure many years of satisfactory service.
This booklet is meant to increase your understanding of your unit, tell you how to operate it efficiently and how to obtain
the greatest measure of comfort at the lowest operating expense. Please read this booklet thoroughly. We appreciate your
interest in our product and your decision to purchase our furnace. Enjoy your comfort.
HOW YOUR GAS
FURNACE WORKS
Your furnace is a very easy appliance to
take for granted. Season after season, it
sits there in your home, keeping you
warm and comfortable. For this reason,
you may never have given much thought
to the way your furnace operates. In
order to get the safest and most efficient
operation from your furnace, though,
you should understand how your furnace does its job.
When you set your thermostat to provide
more heat in your home, you are starting
the heating cycle of the furnace. The gas
valve inside the furnace opens to supply
gas to the burners. The hot surface igniter lights the main burners. When the
temperature inside the furnace reaches
the operating level, the blower starts and
distributes the warm air throughout the
home. When the temperature set on the
thermostat is reached, the gas valve
closes, the main burners are turned off,
and the blower continues to run until the
remaining warm air in the system is distributed. When the blower stops, the
heating cycle has ended.
START-UP AND
SHUTDOWN GENERAL
INSTRUCTIONS
Read and follow these procedures
CAREFULLY and COMPLETELY.
Before attempting to start your furnace,
always do the following things FIRST:
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CAUTION: When a furnace is installed in an attic or other insulated space, or if insulation is
added, examine the furnace to
ensure that the furnace is kept
clear and free of insulation.
Open windows or make other provisions to ventilate the area around the
furnace.
If the blower is running, wait until it
shuts off automatically.
Turn off all electrical power to the
furnace.
Make sure all metal surfaces of the
furnace have cooled to room temperature before beginning.
FOR YOUR SAFETY,
READ BEFORE
OPERATING:
WARNING: If you
do not follow these instructions exactly, a fire or explosion may result, causing
property damage, personal
injury or loss of life.
KEEP THE FURNACE
AREA CLEAR
NEVER . . . use the area around your
furnace as a storage area for items
which could block the normal flow of air.
This flow of air is required for ventilation
of the various furnace components.
NEVER . . . store flammable materials of
any kind near your furnace. Gasoline, solvents, and other volatile liquids should be
stored only in approved containers outside
your home. These materials vaporize easily and are extremely dangerous.
NEVER . . . store cleaning materials
near your furnace. Materials such as
bleaches, detergents, powdered cleansers, etc., can cause corrosion of the heat
exchangers.
WARNING: Insulating materials
may be flammable.
Turn the thermostat OFF.
A. This appliance does not have a pilot.
It is equipped with an ignition device
which automatically lights the burners.
Do not try to light the burners by hand.
B. BEFORE OPERATING, smell all
around the appliance area for gas.
Be sure to smell next to the floor
because some gas is heavier than
air and will settle on the floor.
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If you cannot reach your gas supplier,
call the fire department.
C. Use only your hand to turn the gas
control knob. Never use tools. If the
knob will not turn by hand, don’t try
to repair it. Call a qualified service
technician. Force or attempted repair may result in a fire or explosion.
WARNING: Do not use this furnace if any part has been under
water. Immediately call a qualified
service technician to inspect the
furnace and to replace any part of
the control system and any gas
control which has been underwater.
LIGHTING
INSTRUCTIONS
1. STOP! Read all preceding safety information.
2. Set the thermostat to lowest setting.
3. Make sure all electrical power to the
furnace is OFF.
4. This furnace is equipped with a hot
surface ignition device which automatically lights the burners. Do not
try to light the burners by hand.
5. Remove the control access panel by
lifting the panel up and outward.
6. Turn knob on the gas control clockwise to the "OFF" position.
7. Wait five minutes to clear out any
gas. If you then smell gas, STOP!
Follow step B in the preceding
safety information. If you don’t smell
gas, go to the next step.
8. Turn the knob on the gas control counterclockwise to the "ON" position.
9. Replace the control access panel.
10. Turn on electrical power to furnace.
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.
2
11. Set the thermostat setting.
12. The unit will go through a 17-second
igniter warm-up period. Then if the
unit does not light within 4 seconds,
the unit will go through two additional
cycles before locking out.
13. If the furnace will not operate, follow
the instructions "To Turn OFF Gas To
Furnace" and call your service technician or gas supplier.
®
2. Turn off all electrical power to the
furnace if service is to be performed.
3. Remove the control access panel.
4. Turn the knob on the gas control
clockwise to OFF.
5. Replace the control access panel.
YOUR FURNACE’S
FILTER WHAT IT DOES
WHITE-RODGERS 36E98 VALVE
Wiring
Terminals
Wrench
Boss
Outlet
Inlet
ON - OFF Switch
Main
Regulator
Adjust
Outlet
Pressure
Tap
WHITE-RODGERS 36E24 VALVE
SHUTDOWN
INSTRUCTIONS
TO TURN OFF GAS
TO FURNACE
CAUTION: Should overheating
occur, or the gas supply fail to shut
off, shut off the manual shut-off
valve to the furnace before shutting off the electrical supply..
1. Set thermostat to the lowest setting.
EXTERNAL MANUAL
SHUTOFF VALVE
TO GAS
SUPPLY
TO GAS
SUPPLY
GROUND JOINT UNION
MAY BE INSTALLED
INSIDE OR OUTSIDE UNIT
The filter in your furnace takes the lint
and dust out of the air that passes
through it. This keeps dirt particles from
getting into the moving parts of the furnace, where they could cause serious
damage. It also keeps the dirt from circulating through your home.
As the filter continues to collect these
particles, it becomes clogged and no
longer allows enough air to circulate
through the furnace. If this happens, the
heat exchangers and blower motor
could overheat; a potentially dangerous
situation. It is very important to keep the
air filter clean!
Never operate your furnace without a
suitable air filter.
FREQUENCY OF
CHECKING FILTERS
Clean your furnace’s filter at least every
three months. If you need to replace a
filter, check the filter chart to be sure you
install the right size and type of filter for
your furnace.
If your home is new, you should check
the filter every week for the first four
weeks after you begin to use the furnace, and then at least every three
weeks after that, especially if the system
runs constantly.
FILTER FRAME
shown, slide the filters out of the accessory through the slot on its side.
To check filters located in the blower
compartment, remove the blower compartment panel.
NOTE: The spring-loaded safety
cutoff switch, mounted under the
blower deck in the control box will
automatically cut off the electrical
power supply to the furnace when
the blower panel is removed.
A filter mounted on the side of the furnace can be removed by pushing down
on the looped end of the wire filter retainer until it clears the lip of the furnace
casing.
The retainer may be swung toward the
center of the furnace, exposing the filter
for removal. Reverse the procedure to
reinstall filters.
LOCATING/REMOVING
FILTERS
DROP LEG
DROP LEG
GAS VALVE
TYPICAL GAS PIPING
Most upflow furnaces have their filters
located on the side or bottom of the
furnace, inside the blower compartment.
Some models may have the filter located
in an accessory such as a single side
return filter frame.
If your furnace has a single side return
filter frame accessory like the one
3
FILTER RETAINER
®
20 x 25
CAUTION: Before proceeding,
be sure the area is well ventilated.
Turn the thermostat OFF. If the
blower is running, wait until it
stops automatically. Turn OFF the
gas and electrical power supplies
to the furnace. Check all metal
parts and surfaces to be sure they
have cooled to room temperature
before you begin.
Remove the front panels and the panel
on the front of the burner box after turning the knob on the gas control to the
OFF position. Check the following items:
Check for dust and lint on the sensor and
main burners.
Check combustion air and vent pipe for
blockage, corrosion or leakage.
Check all components to be sure they
are in good condition.
If all components appear to be in good
operating condition, turn the knob on the
gas control to the ON position after replacing the front panel of the burner box.
Replace the front panels. Restore gas and
power supplies to the furnace, and set
thermostat to the desired temperature.
If, during your inspection of your furnace, you find any of the following conditions:
P3URD20N09501 (2) 16 x 25
20 x 25
•
P3URD20N11201 (2) 16 x 25
22 x 25
P3URD20N13001 (2) 16 x 25
22 x 25
To remove bottom mounted filter(s) on
all furnaces, push the looped end of the
filter retainer to the side and then lift up
to expose the filter for removal. Reverse
the procedures to install filters.
HOW TO CLEAN YOUR
FURNACE’S FILTER
High-velocity filters may be cleaned with
a vacuum cleaner or washed with a garden hose. Be sure to shake off excess
water before re-installing the filter.
MOTOR LUBRICATION
The motors in these furnaces are permanently lubricated, and require no periodic oiling.
FILTER SIZES
MODEL
SIDE
BOTTOM
P3URD08N03701
16 x 25
14 x 25
P3URD10N05501
16 x 25
16 x 25
P3URD12N07501
16 x 25
16 x 25
P3URD16N07501
16 x 25
20 x 25
P3URD14N09501
16 x 25
NOTE: Filter must be high velocity type.
INSTALLATION AND
MAINTENANCE
INSTRUCTIONS
It is the owner’s responsibility to ensure
that an annual inspection of the entire
heating portion of the unit is made by a
qualified service agency.
The inspection should include heating
element, vent/combustion air piping, to
see that they are clear and free of obstructions and without holes or corrosion.
Make sure the horizontal run of the vent
system slopes upward and all of the connections are secure.
Make sure the return air duct connections are physically sound and sealed to
the furnace casing, and terminates outside the space containing the furnace.
Make sure no sagging, cracks, gaps,
etc. exist around the base of the furnace.
Check the main burner flames for proper
adjustment per the illustration below.
COMBUSTION AIR INTAKE
BURNER
FLAME
MANIFOLD
BURNER
INNER FLAME CONES
Routine periodic maintenance checks
should be done on your furnace at least
every time you check the filters.
Unitary Products Group
P.O. Box 1592, York, Pennsylvania USA 17405-1592
Subject to change without notice. Printed in U.S.A.
Copyright  by York International Corporation 1996. All Rights Reserved.
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Excessive amounts of dust and lint
on components.
Damaged or deteriorated components or surfaces.
•
Blockage in the combustion air or
vent pipe passages.
Call a certified dealer/service man to
check your furnace, or for more information if you have questions about the operation of your furnace.
SBY
650.75-O3Y
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