Carrier BW9, DEHXX Owner's Manual
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WARNING: FIRE OR EXPLOSION
HAZARD If the information in this manual is
not followed exactly, a fire or explosion could
result causing property damage, personal
injury or death.
— 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.
Model BW9
Gas-Fired
Direct Vent
Condensing
NOTE TO INSTALLER:
This manual must be left with the equipment user.
USER:
Please read all manuals and retain manuals for
future reference.
!
WARNING: CARBON MONOXIDE
POISONING HAZARD
Failure to follow this warning could result in
personal injury or death. Carbon Monoxide is
invisible, odorless, and toxic! We recommend a
carbon monoxide alarm in your home, even if
you do not own a gas appliance. Locate the carbon monoxide alarm in the living area of your
home and away from gas appliances and doorways to attached garages. Follow the alarm
manufacturer’s instructions included with the
alarm.
Water Boiler
USER’S INFORMATION
MANUAL FOR THE
OPERATION AND
MAINTENANCE OF YOUR
NEW GAS-FIRED DIRECT
VENT CONDENSING BOILER
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 been wet or
the furnace if deemed necessary.
Gas-Fired Direct Vent Condensing Water Boiler
Congratulations! Your new gas-fired indoor boiler is an excellent choice and sound investment in home heating comfort. Your modern boiler
represents the latest in engineering development and is the culmination of many years of experience from one of the most reputable manufacturers of residential hydronic heating systems.
Not only is your new boiler one of the most energy-efficient heating systems you can buy today, it is also one of the safest and most dependable.
With only minimal care, your new boiler will continue to deliver money-saving home comfort and enjoyment for many years to come. Spend
just a few minutes with this manual to learn the operation of your new boiler and the small amount of maintenance it takes to help keep it
operating at peak efficiency.
12
Model BW9-50 Through 100 Model BW9-125 Through 200
Gas-Fired Direct Vent Gas-Fired Direct Vent
Condensing Water Boiler Condensing Water Boiler
BOILER IDENTIFICATION
For your convenience, record the product and serial numbers of your new boiler on the form below. Should you ever require service, you will
have ready access to the information needed by the service representative.
Product No. ___________________________________________________________________________________________
Serial No.______________________________________________________________________________________________
Date Installed __________________________________________________________________________________________
Dealer Name __________________________________________________________________________________________
Address_______________________________________________________________________________________________
City___________________________________________________________________________________________________
State_______________________________________________________________ Zip________________________________
Telephone _____________________________________________________________________________________________
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Typical boiler and piping arrangements are shown in Fig. 3 through 6. Since there are many variations in boiler piping systems,
your system may not look the same as shown. Your dealer is your best resource to explain your particular boiler piping arrangement.
BW9 050, 075, 100
Typical Single Zone Piping
SERVICE
VALVE
CIRCULATOR
CAN VENT
SHUT OFF VALVE
PURGE VALVE
SERVICE
VALVE
EXPANSION TANK
3
SUPPLY TO
SYSTEM
GATE VALVE
FEED
WATER
REDUCED PRESSURE
BACKFLOW PREVENTER
PRESSURE
REDUCING VALVE
RETURN FROM
SYSTEM
4
BW9 125, 150, 175, 200
Typical Single Zone Piping
ZONE SERVICE
VALVE
SUPPLY TO
ZONES
FEED
WATER
RETURN FROM
ZONES
ZONE SERVICE
VALVE
GATE VALVE
REDUCED PRESSURE
BACKFLOW PREVENTER
EXPANSION TANK
SHUT OFF VALVE
PURGE VALVE
PRESSURE
REDUCING VALVE
CAN VENT
ZONE VALVE
CIRCULATOR
BW9 050, 075, 100
Typical Multi-Zone Piping
PRE-MIX BURNER
TEMPERATURE/
PRESSURE GAUGE
CONDENSATE TUBE
SIGHT GLASS
GAS VALVE
INTEGRATED
BOILER CONTROL
WITH DIAGNOSTICS
BOILER DRAIN
5
CONTROL PANEL
AIR PRESSURE SWITCH
TRANSFORMER
EXHAUST TEE WITH DRAIN
FLUE EXHAUSTER
Typical Multi-Zone Piping
LOW WATER CUT-OFF
MANUAL GAS
SHUT-OFF
COMBUSTION
AIR INTAKE
EXHAUST TEE
WITH DRAIN
BOILER DRAIN
ZONE SERVICE
VALVE
ZONE SERVICE
VALVE
BW9 125, 150, 175, 200
SIGHT GLASS HOT SURFACE
IGNITOR
PRE-MIX
BURNER
COMBUSTION
AIR BLOWER
INTEGRATED BOILER
CONTROL WITH
DIAGNOSTICS
PRESSURE
SWITCHES
6
BW9 050, 075, 100
Component Location
7
8
BW9 125, 150, 175, 200
Component Location
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