®
USER’S, MAINTENANCE
CONTENTS
SAFETY INFORMATION . . . . . . . . . . . . . . . 2
SYSTEM OPERATION. . . . . . . . . . . . . . . . . 2
THERMOSTATS. . . . . . . . . . . . . . . . . . . . 2
SPARK TO PILOT IGNITION
DEVICE. . . . . . . . . . . . . . . . . . . . . . . . . 2
HEATING . . . . . . . . . . . . . . . . . . . . . . . . . 2
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . 3
CIRCULATING FAN . . . . . . . . . . . . . . . . . 3
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FOR YOUR SAFETY, READ BEFORE
OPERATING. . . . . . . . . . . . . . . . . . . . . . . 3
WHAT TO DO IF YOU SMELL GAS . . . . . . 3
START-UP INSTRUCTIONS - HEATING
SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 4
SHUTDOWN INSTRUCTION - TO TURN
OFF GAS TO APPLIANCE . . . . . . . . . . . 4
SECURE OWNER’S APPROVAL . . . . . . . . 4
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . 5
NORMAL MAINTENANCE . . . . . . . . . . . . 5
LUBRICATION . . . . . . . . . . . . . . . . . . . . . 5
GENERAL MAINTENANCE . . . . . . . . . . . 5
FILTER CARE. . . . . . . . . . . . . . . . . . . . . . 5
OUTDOOR COIL . . . . . . . . . . . . . . . . . . . 5
BURNER. . . . . . . . . . . . . . . . . . . . . . . . . . 5
TO CLEAN BURNERS . . . . . . . . . . . . . . . 5
COMBUSTION AIR DISCHARGE . . . . . . 5
CLEANING FLUE PASSAGES AND
HEATING ELEMENTS . . . . . . . . . . . . . 5
REGISTERS . . . . . . . . . . . . . . . . . . . . . . . 5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . 6
BEFORE CALLING A SERVICE-
PERSON . . . . . . . . . . . . . . . . . . . . . . . . 6
REPLACEMENT PARTS . . . . . . . . . . . . . . . 6
SOME EFFICIENCY DO’S AND DONT’S . . 6
and
SERVICE INFORMATION
MANUAL
SINGLE PACKAGE
AIR CONDITIONER
GAS/ELECTRIC
The manufacturer recommends that the “User” read all sections of this
manual and keep the manual for future reference.
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or property damage.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
- WHA T 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.
• Leave the building immediately.
• 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.
291891-YUM-A-0207
291891-YUM-A-0207
Congratulations . . .
On your purchase of one of our Single Package Air Conditioning Units. This energy efficient system has been precision
designed, manufactured of high quality materials and has passed many vigorous inspections and tests to ensure years of satisfactory service.
Please read this manual thoroughly. It will help you understand your system, tell you how to operate it efficiently and how to
obtain the greatest measure of comfort at the lowest operating expense.
We appreciate your interest in our products and your decision to purchase our Single Package Unit. Enjoy you r comfort.
SAFETY INFORMATION FOR YOUR SAFETY
• Make sure that the furnace
area is clear and free of combustible materials, gasoline
and other flammable vapors
and liquids.
• Be sure the furnace is free and
clear of insulating material.
Examine the installation of the
furnace for addition of insulation. Some insulations are
combustible.
• For proper operation of this furnace, air for combustion and
ventilation is required. Make
sure that these openings are
not obstructed.
• For lighting or shutting down
this furnace, refer to the lighting instructions provided adjacent to the burners and also
located in this manual.
• A blocked vent roll-out switch
is provided in the burner compartment. This switch is a manual reset. If the furnace fails to
operate, contact a qualified
service agency.
• Should the gas supply fail to
shut off or if overheating occurs,
shut off the gas valve to the furnace before shutting off the
electrical supply. Then call a
qualified service technician.
• Do not use this furnace if any
part has been under water. A
flood-damaged furnace is
extremely dangerous. Attempts
to use the furnace can result in
fire or explosion. A qualified
service agency should be contacted to inspect the furnace
and to replace all gas controls,
control system parts, electrical
parts that have be en wet or the
furnace if deemed necessary.
• Determine the integrity of the
installation regarding the flue
gas vent, the return and supply
air duct, the equipment is well
supported and there are no
signs of deterioration. The manufacturer recommends that
main burner, ignition de-vice
and controls are inspected by a
qualified furnace technician
before each heating season.
This gas/electric, heating/cooling
unit is designed for outdoor use
and can be installed anywhere
from grade level to the roof. Electric air conditioning in the summer
and gas heating in the winter - all
from a single unit.
SYSTEM OPERATION
THERMOSTATS
Set your thermostat for either heating or cooling then set it for the
desired temperature. DO NOT
MOVE THE THERMOSTAT RAPIDLY ON AND OFF, OR BACK
AND FORTH FROM HEAT TO
COOL. THIS COULD DAMAGE
YOUR EQUIPMENT.
Always allow at least 5 minutes
between changes. Find the tem-
perature that is most comfortable to
you, and then LEAVE YOUR
THERMOSTAT ALONE. (Exception is for night or vacation “set
back” to conserve energy)
Manually moving the thermostat up
or down will not speed up temperature changes in your rooms. This
only causes the thermostat switch
to function at your command rather
than responding to room temperature.
Heat generated by devices other
than the furnace may interfere with
thermostat performance. Therefore, lamps, radios, television sets,
etc. should not be placed near the
thermostat.
SPARK TO PILOT IGNITION
DEVICE
This unit is equipped with a spark
to pilot ignition device. The control
is designed to automatically light
the burner each time the thermostat “calls” for heat.
Do not attempt to manually light the burners. Personal injury could result.
HEATING
When the thermostat calls for
HEAT, the thermostat terminal “W”,
“W1” or “W2” is energized, the control board checks for a open pressure switch “PS” and closed limit
switches, then energizes the combustion air blower.
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291891-YUM-A-0207
After combustion airflow is established, the air proving pressure
switch “PS” closes, the ignitor is
energized and the pilot valve opens
igniting the pilot flame.
The flame rod senses a flame and
de-energizes the ignitor opening
the main gas valve and the main
burners light.
30 seconds after the main burners
light the circulating fan is energized
at the heating speed.
When the thermostat is satisfied,
terminal W is de-energized, deenergizing the ignition system closing the gas valve.
After a 30 second postpurge timing
period, the combustion air blower is
de-energized and the heat fan off
timing begins.
When this field selected heat fan
off timing is completed the circulating fan is de-energized.
WARNING
Flue hood surface and
immediate area is designed
to operate at high temperatures during the heating
cycle. Special attention
must be given to keep all
human contact and debris
away from this area.
V E N T O U T L E T S C R E E N
F L U E V E N T O U T L E T
A I R H O O D
If a call for “COOL” occurs, the circulating fan continues to run at the
cool speed.
If a call for “HEAT” occurs, the circulating fan switches to heat speed
after a 30 second delay.
When the thermostat ends the call
for “FAN”, the thermostat is deenergized, de-energizing the circulating fan.
INPUT
The correct heat capacity of the furnace is regulated by the burner orifices and the gas pressure. The
proper orifices are furnished but
the gas pressure regulator must be
adjusted by the installing serviceman or gas company. This is a
“one-time” adjustment.
FOR YOUR SAFETY, READ
BEFORE OPERATING
If the limit switch “LS”, auxiliary
limit switch “ALS” or the rollout
switch “RS” open, the ignition system is de-energized and the gas
valve closes. The combustion
blower and the circulating fan are
energized.
The combustion blower remains
energized for the 30 second postpurge timing period if the limit
switch “LS”, auxiliary limit switch
“ALS” or the rollout switch “RS”
contacts reset (the rollout “RS” and
auxiliary limit switch “ALS” must be
manually reset). The circulating fan
remains energized for the selected
heat delay off timing.
Normal operation of the system
resumes.
WARNING
Should overheating occur,
shut off the manual gas
valve external to the appliance before shutting off the
electrical supply.
WARNING
Incorrect installation of the
flue vent hood could cause
personal injury or property
damage.
COOLING
When the thermostat calls for
“COOL”, the thermostat signals the
compressor and outdoor fan to run.
The circulating fan is immediately
energized at cooling speed.
When the thermostat is satisfied,
the compressor and outdoor fan is
de-energized.
After a cool fan off delay timing of
30 seconds the circulating fan is
de-energized.
CIRCULATING FAN
When the thermostat calls for
“FAN”, the thermostat terminal signals the circulating fan to run at the
cool speed.
WARNING
If you do not follow these
instructions exactly, a fire
or explosion may result,
causing property damage, personal injury or
loss of life.
A. BEFORE OPERATING, smell all
around the appliance area for gas.
Be sure to smell around the base
of the unit because some gas is
heavier than air and will settle in
the area.
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.
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291891-YUM-A-0207
• 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.
A. Use only your hand to push in or
turn the gas control knob. Never
use tools. If the knob will not push
in or 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.
B. Do not use this appliance if any
part has been under water.
Immediately call a qualified
service technician to inspect
the appliance and to replace
any part of the control system
and any gas control which has
been under water.
START-UP INSTRUCTIONS
- HEATING SYSTEM
NOTE: See General instructions for
Start-up and Shutdown of
your gas heating system.
1. STOP! Read the safety informa-
tion.
2. Set the thermostat to the lowest
setting.
3. Make sure all electrical power to
the furnace is “OFF”.
4. This appliance has a device
which automatically lights the
pilot and inturn, lights the burners.
5. Remove burner access panel
by removing screws and lifting
panel out.
6. Push the manual gas switch to
the “OFF” position.
7. Wait five (5) minutes to clear out
any gas. If you then smell gas,
STOP! Follow step A in the
safety information. If you don't
smell gas, go to next step.
8. Push the manual gas switch to
the ON position.
9. Replace the control access
panel.
10.Turn on all electrical power to
the appliance.
11.Set the thermostat to the
desired setting.
12.If the appliance will not operate,
follow the instruction “To Turn
OFF Gas To Application” and
call your service technician or
gas supplier.
SHUTDOWN INSTRUCTION
- TO TURN OFF GAS TO
APPLIANCE
Should overheating occur,
or the gas supply fail to
shut off, shut off the manual gas valve to the furnace before shutting off
the electrical supply .
1. Set the thermostat to the lowest
setting.
2. Turn off all electrical power to the
appliance if service is to be performed.
3. Remove burner access panel by
removing screws and lifting
panel out.
4. Turn the manual gas switch to
the “OFF” position.
Manual
Gas Switch
Manual
Gas
Switch
5. Replace the control access
panel.
WARNING
ELECTRICAL SHOCK,
FIRE OR EXPLOSION
HAZARD
Failure to follow safety
warnings exactly could
result in dangerous operation, serious injury, death
or property damage.
Improper servicing could
result in dangerous operation, serious injury, death
or property damage.
• Before servicing, disconnect all electrical power to
furnace.
• When servicing controls,
label all wires prior to disconnecting. Reconnect
wires correctly.
• Verify proper operation
after servicing.
SECURE OWNER’S APPROVAL
When the system is functioning
properly, secure the owner’s
approval. Show the owner the location of all disconnect switches and
the thermostat. Teach owner how
to start and stop the unit and how
to adjust temperature settings
within the limitations of the system.
Advise owner that the flue exhaust
hood surface and the immediate
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291891-YUM-A-0207
area will experience high temperatures during the heating cycle. All
unauthorized personnel and debris
must be kept away from this area.
MAINTENANCE
NORMAL MAINTENANCE
WARNING
PRIOR TO ANY OF THE
FOLLOWING MAINTENANCE PROCEDURES,
SHUT OFF ALL POWER
TO THE U NI T, TO AVOID
PERSONAL INJURY.
Periodic maintenance consists of
changing or cleaning filters. Under
some conditions, the main burners
should be cleaned.
LUBRICATION
The indoor blower motor, outdoor
fan motor and venter motor are
permanently lubricated and require
no maintenance.
GENERAL MAINTENANCE
The manufacturer recommends
that the furnace system be
inspected once a year by a qualified service person.
For proper and safe operation, the
gas heating section needs air for
combustion and ventilation. Do not
block or obstruct air openings on
the unit, nor the spacing around the
unit. Keep the gas heating s ystem
area clear and free of combustible
materials, gasoline and other flammable vapors and liquids.
Snow or debris should not be
allowed to accumulate in or around
the unit. Do not permit overhanging
structures or shrubs to obstruct
condenser air discharge or vent
outlet on your unit. These provide
air for combustion and ventilation.
FILTER CARE
Single phase units are shipped without a filter and is the responsibility of
the installer to secure a filter in the
return air ductwork or install a Filter/Frame Kit (1FF0110, 1FF0112 or
1FF0114).
A filter rack and a high velocity fil-
ters are standard on three phase
units.
Filters must always be used and
must be kept clean. When filters
become dirt laden, insufficient air will
be delivered by the blower, decreasing your units efficiency and increasing operating costs and wear-andtear on the unit and controls.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the outdoor coil surface
or other parts in the air circuit.
Cleaning should be as often as
necessary to keep the coil clean.
Use a brush, vacuum cleaner
attachment, or other suitable
means. If water is used to clean the
coil, be sure that the power to the
unit is shut off prior to cleaning.
Exercise care when cleaning the coil so that the coil
fins are not damaged.
Do not permit the hot condenser air discharge to be
obstructed by overhanging structures or shrubs.
BURNER
At the beginning of each heating
season, make a visual check of the
main burner flame. If it is not possible to adjust for the proper flame,
the burner may need cleaning.
TO CLEAN BURNERS
Remove them from the furnace as
explained in Burner Instructions.
Clean burners with hot water
applied along top of the burner.
COMBUSTION AIR DISCHARGE
Visually inspect discharge outlet
periodically to insure soot and dirt
buildup is not excessive. If necessary, clean to maintain adequate
combustion air discharge.
The manufacturer recommends
that the furnace system be
inspected once a year by a qualified serviceperson.
CLEANING FLUE PASSAGES
AND HEATING ELEMENTS
With proper combustion adjustment the heating element of a gas
fired furnace will seldom need
cleaning. If the element should
become sooted, it can be cleaned
as follows:
1. Remove the burner assembly as
outlined in BURNER INSTRUCTIONS.
2. Remove the screws securing the
restrictor plate to the tube sheet.
3. Using a wire brush on a flexible
wand, brush out the inside of
each heat exchanger from the
burner inlet and flue outlet ends.
4. Brush out the inside of the
restrictor plate to the tube sheet.
5. If soot build-up is particularly
bad, remove the vent motor and
clean the wheel and housing.
6. After brushing is complete, blow
all brushed areas with air or
nitrogen. Vacuum as needed.
7. Replace parts in the order they
were removed in steps 1 through
3.
REGISTERS
Supply air and return air registers
must be open when the unit is in
operation. Furniture must not block
airflow in or out of the registers.
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291891-YUM-A-0207
TABLE 1: GAS RATE - CUBIC
FEET PER HOUR
SECONDS
FOR ONE
REV. 1/2 CU. FT. 1 CU. FT.
10 180 360
12 150 300
14 129 257
16 113 225
18 100 200
20 80 180
22 82 164
24 75 150
26 69 138
28 64 129
30 60 120
32 56 113
34 53 106
36 50 100
38 47 95
40 45 90
42 43 86
44 41 82
46 39 78
48 37 75
50 36 72
52 35 69
54 34 67
56 32 64
58 31 62
60 30 60
1.
EXAMPLE: By actual measurement, it
takes 38 seconds for the hand on the 1cubic foot dial to make a revolution with
just a 100,000 BTUH furnace running.
Using this information, locate 28 seconds in the first column of the table.
Read across to the column headed “1
Cubic Foot,” where you will see that 95
cubic feet of gas per hour are consumed
by the furnace at that rate. Multiply 95 x
1050 (the BTU rating of the gas
obtained from the local gas company).
The result is 99,750 BTUH which is
close to the 100,000 BTUH rating of the
furnace.
SIZE OF TEST DIAL
1
TROUBLESHOOTING
BEFORE CALLING A SERVICEPERSON:
A. Check thermostat setting and
insure thermostat is calling for heat
or cooling.
B. Check thermostat for lint, dust,
etc.
C. Check fuses or circuit break-
ers.
D. Check filters for excessive dust
accumulation and/or restriction.
REPLACEMENT PARTS
Contact your local York parts distribution center for authorized replacement parts.
SOME EFFICIENCY DO'S
AND DON'TS
DON'T heat or cool unused areas.
Reduce supply and return air flow
to a minimum in areas which are
not living spaces (storage rooms,
garaged, basements, etc.).
DON'T be a “thermostat jiggler”.
Moving your thermostat setting will
not make your system heat or cool
any faster. Adjust your thermostat
to a comfortable setting and leave it
there.
DON'T restrict air circulation. Placing furniture, rugs, etc. in such a
way that they interfere with air
vents will make your system work
harder to achieve a comfortable
temperature level. This requires
more energy, which means greater
cost to you.
DON'T heat or cool when you are
away. If you are going to be away
for a day or more, re-adjust your
thermostat accordingly. Your furniture is far less demanding than you
are when it comes to comfort levels. However, don't expect the system to restore comfort conditions
immediately upon returning home.
It will take a little time.
DON'T locate lamps or other heatproducing appliances (radios, TV's,
heaters, etc.) near your thermostat.
The heat from these items will give
your thermostat “false information”
about the temperature in the room.
DO select a comfortable thermostat
setting, but keep in mind that moderation in temperature selection will
save energy.
DO turn on your kitchen exhaust
fan when cooking and your bathroom exhaust fan when showering.
Also, make sure your clothes dryer
is properly vented. If these items
are neglected, an excess heat and
humidity condition may be created,
causing your air conditioning system to run longer.
DO set your thermostat a few
degrees lower than normal several
hours before entertaining a large
group of people in a relatively small
area. People give off a considerable amount of heat and moisture
in a closed area.
DO keep drapes and Venetian
blinds closed when practical.
These items provide insulation
against heat loss/gain.
DO contact a qualified serviceperson to make repairs or adjustments
to your system. They have been
trained to perform this service.
6 Unitary Products Group
291891-YUM-A-0207
Unitary Products Group 7
ISO 9001
Certified Quality
Management System
Subject to change without notice. Printed in U.S.A. 291891-YUM-A-0207
Copyright © by Unitary Products Group 2007. All rights reserved. Supersedes: Nothing
Unitary 5005 Norman
Products York OK
Group Drive 73069
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