Bryant OM11-19 User Manual
user’s information manual
SINGLE PACKAGE ROOFTOP
GAS HEATING/
ELECTRIC COOLING UNITS
Cancels: OM11-19 OM11-22
581B
DuraPac Plus Series
Sizes 036-150
3 to 121/2 Tons
3/15/02
NOTE TO INSTALLER:
This manual should be left with the equipment owner.
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.
WARNING: Improper installation, adjustment,
alteration, service, or maintenance could cause property damage, serious injury or death. Refer to this
manual. For assistance or additional information,
consult a qualified installer, service agency, or the
gas supplier.
TO LIGHT UNIT
WARNING:
1. Do not attempt to light by hand; personal injury
may result.
2. Before attempting to start the g as heating section, familiarize yourself with all the procedures that must be followed.
If you do not follow these instructions exactly, a fire or
explosion may result. Property damage, injury, or loss
of life could occur.
See Fig. 1 for location of gas valve. Refer to Fig. 2 while
proceeding thro ugh the following steps.
I. Step 1
Set room thermostat to the lowest tem perature setting and
set SYSTEM switch to HEAT or AUTO. position.
II. Step 2
Close the manual gas valve.
III. Step 3
Turn off the electrical supply to the unit and install lockout
tag.
IV. Step 4
Remove the burner access panel.
V. S t ep 5
Move the control on the gas va lve to the OFF position and
wait 5 minutes.
VI. Step 6
Move control on gas valve to ON position.
WARNING: Before performing recommended
maintenance, be sure main power switch to unit is
turned off. Electrical shock could caus e serious injury
or death.
Your rooftop combination heating/cooling unit is equipped
with an automatic direct-spark ignition and induced-draft
combustion blow er.
WARNING: Do not attempt to light by hand; seri-
ous injury or death may result.
Fig. 1 — Typical Gas Valve Location
(581B090 Shown)
STEP 1
STEP 2
MAIN
OFF
STEP 3
ON
LOCK-OUT
TAG
TWO-STAGE GAS VALVE
W
E
O
R
C
L
S
E
C
A
R
L
P
E
M
C
HI
ON
F
F
O
3-Phase Models
581B036-072072
581B036-072115
581B048-072150
581B090-102125
581B090-120180
581B090-150224
581B120-150250
STEP 4
SINGLE-STAGE VALVE
California Compliant 3-Phase
581B036-060071
581B036-060114
581B048,060149
Single Phase
581B036-060072
581B036-060115
581B048,060150
Low NO
581B036-060060N
581B036-060090N
581B048,060120N
STEP 6
TWO-STAGE GAS VALVE
W
E
O
R
C
L
S
E
C
A
R
L
P
E
M
C
HI
ON
F
F
O
3-Phase Models
581B036-072072
581B036-072115
581B048-072150
581B090-102125
581B090-120180
581B090-150224
581B120-150250
WR
P3
C2
M1
ON
F
F
O
x
STEP 5
SINGLE-STAGE VALVE
WR
P3
C2
M1
ON
F
F
O
California Compliant 3-Phase
581B036-060071
581B036-060114
581B048,060149
Single Phase
581B036-060072
581B036-060115
581B048,060150
Low NO
x
581B036-060060N
581B036-060090N
581B048,060120N
STEP 7
STEP 8
STEP 9
Fig. 2 — To Light Unit
—2—
STEP 10
VII. Step 7
Replace the burner a ccess panel.
VIII. Step 8
Turn on the electrical supply to unit.
IX. Step 9
Open the manual gas valve.
X. Step 10
Set room thermos tat selector slightly a bove room temperature to start unit. The induced-draft combustion air fan will
start. Main gas valve will open and main burners should
ignite within 5 seconds. If the burners do not light, there is a
22-second delay before another 5-second try. If the burner
still does not light, the time delay is repeate d. If the burner
does not light within 15 minutes, there is a lockout. If burners still do not light, call for service.
WARNING: If the main burners fail to light, or the
blower fails to start, sh ut down gas he atin g sectio n and
call your dealer for service. Failure to follow these
requirements could result in serious injury or death.
XI. Step 11
Set the temperature selector on the room thermostat to d esired setting.
TO SHUT UNIT OFF
WARNING:
1. Do not turn off the electrical power to unit without first turning off the gas supply.
2. Never attempt to manually light the main
burners on unit with a match, lighter, or any
other flame. If the electric sparking device fails
to light the main burners, refer to the following
shutdown procedures. Call your dealer as soon
as possible.
Failure to follow these procedures could result in serious fire or serious injury or death.
Refer to Fig. 3 while proceeding with the following steps:
I. Step 1
Set room thermostat to low est temperature setting and set
SYSTEM switch to OFF position.
II. Step 2
Close the external manual gas valve.
III. Step 3
Turn off the electrical power supply to unit and install lockout tag.
IV. Step 4
Remove the burner access panel.
V. S t ep 5
Move the control on the gas valve to the OFF position.
VI. Step 6
Replace the burner a ccess panel.
VII. Step 7
If unit is being shut down becau se of a m alf unctio n, c all y our
dealer as soon as possible.
If unit is being shut down because the heating season has
ended, restore ele ctrical power to the unit to ensure operation of the cooling sy stem during the cooling season.
Should overheating occur, or the gas supply fa il to shut off,
shut off the manual gas valve to the unit before shutting off
the electrical supply.
Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas
control which has been under water.
MAINTAINING YOUR UNIT
All maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard
procedure.
For your safety, keep the unit area clear and free of combustible materials, gasoline, and other flammable liquids and
vapors.
To ensure proper function ing of th e unit, flow of combus tion
and ventilating air must not be prevented from reaching the
unit.
To ensure proper airflow, clearance to the condenser coil
should be 36 in. on one side and 12 in. on the other. Either
side may receive the greater clearance. A clearanc e of 1 in.
from the bottom of the unit to combustible su rfaces must be
maintained when not using a roof curb. A clearance of 0 in.
from the bottom of the base rail to combustible surfaces must
be maintained when not using a roof curb. A 60-in. clearance
above the unit must be allowed for proper condenser fan
operation.
A clearance of 42 in. should be allowed on the unit control
box side. When ungrounded surfaces are present, allow a
36-in. clearance between unit and the ungrounded surfaces.
Allow 42 in. betw een th e unit and block or concrete walls or
other grounded surfaces.
Clearance of 48 in. must be maintained between flue side
and combustible surfaces.
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Consider the following information before maintaining or
servicing equipment:
WARNING:
1. TURN OFF GAS SUPPLY AND THEN ELECTRICAL POWER TO YOUR UNIT BEFORE
SERVICING OR PERFORMING MAINTENANCE.
2. DO NOT turn off electrical power to this unit
without first turning off the gas supply.
3. When removing access panels or performing
maintenance functions inside your unit, be
aware of sharp sheet metal parts and screws.
Although special c are has been taken t o reduce
sharp edges to a minimum, be extremely careful when handling parts or reaching into the
unit.
Failur e to follow these instructions could result in serious fire or serious injury or death.
I. AIR FILTERS
Air filter(s) should be checked at least every 3 or 4 weeks and
changed or cleaned when necessary. Table 1 indicates the
correct filter size for your unit. See Fig. 4 for filter access
door location.
—3—
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