Bradford White BMFTHW-80 Manuel utilisateur

BMFTHW-80
Bradford White
Marque
Bradford White
Modèle
BMFTHW-80
Taper
Manuel utilisateur
Cascade Instructions Document 1349A
H2384200A
WARNING
If the information in this manual is not
followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
ammable 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
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the re department.
Installation and service must be performed
by a qualied installer, service agency, or gas
supplier.
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualied in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in ue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ou ni
d’autres vapeurs ou liquides inammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trovez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualié
ou par le fournisseur de gaz.
Cascading the
Wall-Mounted, Modulating
Gas, Condensing,
Heating Only, Boiler
Model MFTHW
80,000 BTU/hr
100,000 BTU/hr
120,000 BTU/hr
140,000 BTU/hr
199,000 BTU/hr
• Natural Gas (NG)
Factory Conguration
• Propane Gas (LP)
Field-Convertible
FT
SERIES
Page 2
Table of Contents
SECTION 1
Piping
A. General Plumbing Connection Guidelines ... 3
B. Install a Backow Preventer ......................... 3
C. Piping Diagrams for Cascading Systems . . 3-7
SECTION 2
Electrical
A. Wiring Connections for Cascade ..................... 8
B. Terminal Blocks ............................................ 9
SECTION 3
The Control Display
A. The Control Display .................................... 10
B. The LCD ..................................................... 10
C. Start-Up Sequence ..................................... 11
SECTION 4
Cascade Programming
A. Programming a Cascade System .............. 12
B. The Cascade CH Function ....................13-14
C. Domestic Hot Water ‘Storage Mode’
for Cascade System ................................... 14
D. Cascade System Error Codes .................... 15
Page 3
Cascading the
FT Series ‘Heating Only’ Boiler
WARNING
WARNING
To control thermal expansion, a thermal expansion tank should be installed in systems with an
installed backflow preventer. DO NOT use a closed type expansion tank. Follow expansion tank
manufacturer’s specications to properly size an expansion tank to the installation. Failure to properly
accommodate thermal expansion could result in property damage, severe personal injury, or death.
Do not use FT Series units on common vents. Each unit must have its own supply and exhaust vents.
SECTION 1 Piping
A. General Plumbing Connection Guidelines
• Pipe material must be suitable to meet local codes and industry standards.
• The pipe must be cleaned and without blemish before any connections are made.
• Do not apply a torch within 12˝ of the bottom connections of the Heating Only Boiler. Doing so could
damage the Heating Only Boiler. Such damages ARE NOT covered by product warranty.
• The size of the CH supply pipe should be 1¼˝ diameter.
• Isolation (shutoff valves) should be used to ease future servicing.
• All piping should be insulated.
Multiple FT Series boilers can be connected via a cascade communication cable to create a
bank of boilers that work in tandem. Up to 20 boilers can be controlled by a “Leader” FT Series
boiler with the others acting as “Followers”.
B. Install a Backow Preventer
It may be recommended to use a back ow preventer – check local codes. If a back ow preventer or a
no return valve is used, a thermal expansion tank must be installed on the cold water supply between
the Heating Only Boiler and valve.
C. Piping Diagrams for Cascading Systems
Use at least the MINIMUM pipe size for all Heating Only Boiler loop piping. This is to avoid the
possibility of inadequate ow through the Heating Only Boiler. Using less than the required minimum
pipe size and piping could result in system problems, property damage, and premature Heating
Only Boiler failure. Such problems ARE NOT covered by product warranty.
CAUTION
Use both thread tape and pipe dope to connect to the 1¼˝ CH supply and return. Isolation valves
between the city water supply and inlet are recommended for ease of service.
Cascade Manifold Pipe Sizing (inches)
SIZE
Number of Cascaded Mascot FT Units
2
3
4
5
6
7
8
80
1 1/4
1 1/2
2
2
2
2 1/2
3
100
1 1/2
2
2
2 1/2
2 1/2
3
3
120
1 1/2
2
2 1/2
2 1/2
3
3
3
140
2
2
2 1/2
2 1/2
3
3
4
199
2
2 1/2
3
3
4
4
4
Note: Based on copper pipe and a 20°F Delta T with maximum water velocities of 4-1/2 ft per second
The next four pages give examples of typical cascading hydronic piping diagrams.
Number of cascaded FT units
Page 4
Do not exceed 12" apart
PRIMARY LOOP
SECONDARY LOOP (SPACE HEATING)
CH SUPPLY
(SPACE HEATING)
PRIMARY/SECONDARY
CONNECTION
Do not exceed 12" apart
PRIMARY LOOP
SECONDARY LOOP (SPACE HEATING)
CH SUPPLY
(SPACE HEATING)
PRIMARY/SECONDARY
CONNECTION
ZONE 1
ZONE 2
ZONE 3
FLOOR HEATING
CH RETURN
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
CH SUPPLY
CH RETURNCH RETURN
CH SUPPLY
CH RETURN
Cascade System - Diaphragm type Expansion tank
Piping Symbol Legend
Mixing Valve
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Closed type)
Expansion tank
(Diaphragm type)
Isolation valve
Check valve
Gate valve
2-way valve
Indirect DHW Tank
Air Separator
Pressure Reducing
Valve
NOTE: These drawings are meant to show system piping concept only. Installer is responsible for
all equipment and detailing required by local codes.
C. Piping Diagrams for Cascading Systems (continued)
Page 5
Cascading the
FT Series ‘Heating Only’ Boiler
Cascade System - Zoning with circulation pump
Do not exceed 12" apart
PRIMARY LOOP
SECONDARY LOOP (SPACE HEATING)
CH SUPPLY
(SPACE HEATING)
PRIMARY/SECONDARY
CONNECTION
Do not exceed 12" apart
PRIMARY LOOP
SECONDARY LOOP (SPACE HEATING)
CH SUPPLY
(SPACE HEATING)
PRIMARY/SECONDARY
CONNECTION
ZONE 1
ZONE 2
ZONE 3
FLOOR HEATING
CH RETURN
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
CH SUPPLY
CH RETURNCH RETURN
CH SUPPLY
CH RETURN
Page 6
PRIMARY LOOP
CH SUPPLY
(SPACE HEATING)
ZONE 1
ZONE 2
ZONE 3
FLOOR HEATING
SECONDARY LOOP (SPACE HEATING)
Do not exceed 12" apart
CH RETURN
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
CH SUPPLY
CH RETURN
CH SUPPLY
CH RETURN
DHW Pump
Pressure relief valve
Indirect DHW Tank
Isolation Valve
2-way valve
Mixing Valve
DHW Pump
Indirect DHW Tank
CH SUPPLY
CH RETURN
PRIMARY LOOP
CH SUPPLY
(SPACE HEATING)
ZONE 1
ZONE 2
ZONE 3
FLOOR HEATING
SECONDARY LOOP (SPACE HEATING)
Do not exceed 12" apart
CH RETURN
Circulation pump
Pressure relief valve
Expansion tank
Air separator
(Diaphragm type)
Isolation valve
Check valve
Gate valve
CH SUPPLY
CH RETURN
CH SUPPLY
CH RETURN
DHW Pump
Pressure relief valve
Indirect DHW Tank
Isolation Valve
2-way valve
Mixing Valve
DHW Pump
Indirect DHW Tank
CH SUPPLY
CH RETURN
Cascade System - Indirect Water Heating
C. Piping Diagrams for Cascading Systems (continued)
Cascade System - Zoning with zone valve
Page 7
Cascading the
FT Series ‘Heating Only’ Boiler
Leader Follower
Cascade System
Closely spaced tees
Make up water
Indirect DHW Tank
CH System Pump
DHW System Pump
DHW TEMP
SENSOR
sensor
Space heating zone
circuit
Zone circulators
Purging valves
Cold water
Cascade System - System Application & DHW Tank
C. Piping Diagrams for Cascading Systems (continued)
Page 8
SECTION 2 Electrical
A. Wiring Connections for Cascade
(CN1 RS-485)
(CN1 RS-485)
Ending
Resistor
Last Male
Connector.
Wrap it up neatly and wire-tie it.
It does not need a cap or an end.
Primary
Connector.
Primary
Connector.
Last Female
Connector.
Plug the included
‘Ending Resistor’ into it.
Components Needed :
FT1868 : System Sensor (need only 1).
FT1861 : FT Series/ST Cascade Communication Cable (1 per unit) with Ending Resistor.
Example. If you are cascading 6 units, you will need 6 X FT1861’s and you will throw away
5 of the resistors.
A system sensor must be connected to the master boiler in order to provide feedback for set point
temperature reference and therefore properly control the bank of cascaded boilers.
In order for the system to work properly, the thermostat, 0-10V signal, and/or outdoor sensor must be
connected to the Leader boiler only. Following boilers will run based on the Leader boiler’s controls.
Reference the FT Series Heating Only Installation and Operation manual (1342-NH) to set the Leader
boiler’s temperature set point based on an outdoor sensor, 0-10V signal or a xed temperature set point.
1. Turn off the power.
2. Remove the front covers of the units (4 screws on each unit).
3. Connect the ‘Cascade Communication Cables’ to every unit (add the Resistor to the
end of the last follower. Use the wiring throughway at the bottom of each unit.
4. Plug the primary connector on the cable (as shown) to the receptacle inside the unit.
5. Replace the front covers.
6. Turn on the power.
Page 9
Cascading the
FT Series ‘Heating Only’ Boiler
DHW
PUMP
CH
PUMP
0-10V
Connection
Thermostat
Connection
Outdoor
Sensor
Connection
DHW
TEMP
SENSOR
CASCADE
SYSTEM
SENSOR
LOW
WATER
CUTOFF
B. Terminal Blocks
Page 10
SECTION 3 The Control Display
B. The LCD
The LCD features a backlit
lamp that will illuminate when
a user presses a button.
The display will time out after
approximately 2 minutes.
• Temperature Specications
Operating ambient Temperature Range : -10 to 60°C.
Operating Relative Humidity up to: 90% at 40°C.
Shipping & Storage Temperature Range of : -20 to 80°C.
Buttons
Functionality
PRESS (Tap) PRESS and HOLD (5 seconds)
A
Display Power
Turns Control Display ON / OFF
B Modes Tap to return to menu
(If Display Power was On ) Status Display Mode
(If Display Power was Off ) Installer Mode
C
Heating
Water
CH set-point change mode
(Maxium 82
°C(180°F))
D
Time / Date
Set
No Change To SET: Year/Month/Week/Day/Time/Min
E
Scroll / Select
Menu select or value
up(+)/down(-) or setting dial.
The Control Display has a Control Dial (E), 4 buttons (A, B, C, D), and a Liquid Crystal Display
(with 72 back-lit segments). Section 3 will show you only a few of the functions of the FT Series.
For all functions, please review the FT Series Install and Instruction Manual. Doc 1342.
Status Light
(constant green
when operating
normally)
E
Page 11
Cascading the
FT Series ‘Heating Only’ Boiler
C. Start-Up Sequence
After the appliance is powered ON, the LCD display shows a sequence of information. The icons will ash,
followed by various indicators that describe the appliance controller and software versions.
After start-up, the display appears as follows.
The Control Display can operate through user and service modes that have specific LCD outputs and
dedicated controls, including:
• Changing the Set-Point Temperature
• Error Mode
• Status Display Mode
• Installer Mode
Symbol Name Description
Service Reminder mode Service Reminder mode indication
Outside Temperature Mode Outside Temp setting indication
Anti-freeze mode Anti-freeze mode indication
Storage mode Storage mode indication
Information mode Information mode indication
Communication state Communication state indication
Time setting mode Time /Dispaly/Install mode indication
Fan operating mode Fan operating mode indication
Flame signal Flame Signal indication
CH pump mode CH pump mode indication
Storage pump mode Storage pump mode indication
Internal recirculation mode Internal recirculation mode indication
Celsius mode Indicated as Celsius temperature
Fahrenheit mode Indicated as Fahrenheit temperature
Heat demand mode Heat demand mode indication
DAY mode Current day mode indication
Cascade System connecting
mode
Cascade System connecting mode
indication
Cascade System operating mode
Cascade System operating mode
indication
B. The LCD (continued)
Page 12
SECTION 4 Cascade Programming
A. Programming a Cascade System
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
7. REPEAT steps 1 thru 6 with all following units in
sequence.
5. Then turn the dial to 27:Cn – Set the Number to
00. The Leader unit should always be addressed to
00. The Following units will then start at 01 and go
sequencially from there.
NOTE:
Do NOT change 29:Eh (Common Vent). This
Installer Parameter must always be set to 'Off'.
Once all of the 'Connection Wires' are made and all units are powered on, there are 2 items that need to
be programmed on all units. Start with the Lead Unit and then Repeat on all Following Units.
28: cP – (
PARAMETER)
The
TOTAL NUMBER
of units cascaded. Range: 01 - 20, The Default is 01 so
the Leader must be set to 01. Follower 1 set to 02, follower 2 set to 03, etc.
THEN
27: cn– (
NUMBER
) This is each units ASSIGNED NUMBER. Default 00. Range: 00 - 19 with 00 as the
Leader, 01 (follower 1), 02 (follower 2), etc.
6. Finish by pressing the button.
1.
START
by turning OFF the Power to the Display Control.
2. Then, with the power OFF, Press and HOLD (5 seconds) the
button to get into the Installer Mode.
3. Rotate the Dial until you get to 28cP. Tap Dial E to
enter into that Parameter.
4. Adjust to the Total Number of Units in the Cascaded
System. Range is Default at 01 and goes up to 20 units.
then press (tap) the Dial to save and to Exit.
Page 13
Cascading the
FT Series ‘Heating Only’ Boiler
B. The Cascade CH Function
1. The Leader unit controls all follower units' operation and combustion. All follower units follow what Leader
unit outputs. (Operating temperature and clock will only be controlled on Leader unit , but displayed on
Follower unit )
2. When Cascade is set for auto, the Leader boiler arranges which unit operates and for how long, when there
is a call for heat (CH), the Leader boiler controls the follower units either to increase or reduce ring rate.
* Installer mode 30: Cr -> Cr:at(Default)
3. When Cascade is set for cascade rotation time, the Leader boiler rotates the boilers based on a xed
operating time limit. Each boiler is run (when there is a call for heat) until it reaches the operating time
limit, at which point the Leader boiler turns that boiler off and replaces it in the ring sequence with a boiler
that has been off. In this way, the rst boiler on will be the rst boiler off, and that rst boiler will not turn on
again until the remaining boilers have each run for the operating time limit, as needed to meet demand.
*Installer mode 30: Cr -> Cr:Ct
4. Cascade mode operates via system sensor. Units shut off when system sensor reaches system target
temperature.
5. When each corresponding unit is operating the built in boiler pump operates. Also if a single unit is
operating the external CH pump operates
6. Only the Leader unit needs to be wired to the boiler pump.
Indicate Indicator
Current CH Temperature Set-Point
Celsius or Fahrenheit
or
If Communication state is activated
If ame is detected
Date and Time indicator
If CH pump is operating
If there currently a Demand for Central Heat (CH)
Default CH set-point is 180°F (82°C)
CH set-point range is 86°F ~180°F (30.0°C ~ 82.0°C)
Changing the CHW Set-Point,
press the C
button. The CH Icon and current
CH Setpoint will ash. Turn the E dial clockwise
to increase, and counterclockwise to decrease CH
setpoint, until desired temperature is reached.
Press E dial to save changes and to Exit.
B C
E
A D
NOTE: When you set the temperature set point
on the Leader Heating Only Boiler, it will
automatically be applied to the followers.
Page 14
Cascade Operation Sequence: The rst boiler in the rotation sequence will re to satisfy a call for heat. Once
this boiler reaches 80% of full re the rst boiler will modulate down and a second boiler will be brought on to
split the load between boilers. If the heat demand is not satised a third boiler will be brought on in the same
manner, splitting the heat between the three boilers. This mode of operation will continue until enough boilers
are brought on to satisfy the demand.
As the heating demand is met the boilers will be shut down in reverse order, shutting down each boiler as it
reaches 40% of re, until all boilers are shut down.
Index Numbers Parameter Description
30:Cr
Cr:at Automatic rotation (default)
The rst unit to operate when there is a T/T call is the unit
that ran the least amount of time during the prior heat calls
(burner ON time). Default auto
Cr:Ct Cascade Rotation time
Cascade Rotation time, Range: 0-240 Hours,
Default 48Hours
31: Ct Cascade System temperature
Cascade System temperature:
Range: 95°F – 180°F, Default 180°F
32: Cd
Cascade System Temperature
Differential (burner ON)
Cascade System Temperature Differential (burner ON)
Range: 5-30 °F, Default 10 °F
B. Cascade CH Function (continued)
C. Domestic Hot Water ‘Storage Mode’ for Cascade System.
The boiler cascade system can be set up for Domestic Hot Water by using either a DHW Sensor or DHW
Aquastats with a tank. Note that they are setup differently.
The default DHW priority time is 30 minutes and can be adjusted from 0 to 60 minutes using parameter 24: dP,
see below parameter table.
Using a DHW Sensor
If a DHW sensor is used, the DHW Sensor leads must be connected to the Leader Boiler on the terminal strip
labeled “DHW TEMP SENSOR” (page 9) and sensor installed in the tank.
In this mode the tank sensor will control demand and modulation based on the DHW setpoint (21:dh). In the
case of indirect heaters the boiler will also modulate on the outlet water temperature sensor (25:st).
The DHW System Pump must be connected to the Leader Boiler (same boiler that the DHW sensor is connected
to) on the terminal strip labeled “DHW Pump” (page 9).
Using Aquastats
If a DHW aquastat is used, the maximum DHW load needs to be calculated to determine the number of boilers
required to meet max DHW load. The aquastat must be installed in the tank and wired to each boilers’ terminal
strip “DHW TEMP SENSOR” connection (page 9). Wire the boilers in series with the aquastat: aquastat to rst
boiler and then from boiler to boiler.
The DHW System Pump must be connected to the rst boiler among those selected to handle the domestic
water load on the terminal strip labeled “DHW Pump” (page 9).
Page 15
Cascading the
FT Series ‘Heating Only’ Boiler
D. Cascade System Error Codes
For a complete list of error codes, reference the FT Series Installation and Operation Manual 1342.
Domestic Hot Water Parameters
For a complete list of parameters, reference the FT Series Installation and Operation Manual 1342.
If a DHW aquastat is used, the maximum DHW load needs to be calculated to determine the number of boilers
required to meet max DHW load. The aquastat must be installed in the tank and wired to each boilers’ terminal
strip “DHW TEMP SENSOR” connection (page 10). They can be wired either in parallel (straight from the
aquastat to each boiler) or in series (aquastat to first boiler and then from boiler to boiler).
The DHW System Pump must be connected to the first boiler among those selected to handle the domestic
water load on the terminal strip labeled “DHW Pump” (page 10).
Domestic Hot Water Parameters
For a complete list of error codes reference the Mascot FT Installation and Operation Manual 1342
Index
Numbers
Parameter Description
21: dH
Indirect Storage Tank
Temperature Set Point
Sets Maximum Indirect storage tank
Temperature Range: 95 - 180°F , Default 120 °F
22: dd
Indirect Storage Tank
Differential Set Point
DHW Differential Set Point Range: 5°F-30°F,
Default 7 °F
23: Pr
DHW Pump Post Run Time
DHW Pump Post Run Time Range: 0-10 Min,
Default 1 Min
24: dP
DHW Priority Timer
DHW Priority Timer Range: 0 – 60 Min , Default
30 Min
25: St
Boiler Supply Indirect Storage
Tank Temperature
Boiler Supply Indirect Tank Temperature Range:
120 °F– 180 °F , Default 180 °F
ADD NEW ERROR SECTION
D. Typical Cascade Error Codes
For a complete list of error codes reference the Mascot FT Installation and Operation Manual 1342
Er:30
System Sensor Short
NOTE: This error will only appear if the boiler is used in a cascaded system.
This Error Code will go away when system sensor is repaired or replaced.
1. Check system temperature sensor. Ensure connections are secure.
2. Check system sensor resistance. If resistance is zero, replace the sensor.
3. If the problem persists, replace the main control.
NOTE: During the error state the units will continue to operate. Boiler setpoint
will be the same as the system sensor setpoint until the issue is remedied.
During normal operation boiler setpoint is defaulted to 20°F higher than the
system setpoint to a maximum of 180°F setting
Er:78
Cascade
Communication Error
NOTE: This error will only appear in a cascaded system.
1. Turn power OFF and ON at the boiler display panel.
2. If error reappears, ensure all cascaded boilers are powered ON.
3. If error reappears, check Installer Mode parameter 28 at the Leader boiler.
Ensure the number of cascaded units chosen in this parameter matches the
number of cascaded units in the system.
4. If error reappears, check Installer Mode parameter 27 at all cascaded
boilers. Ensure the address number matches that of the connected boiler (00
for Leader, 01 for Follower 1, etc.) and that no numbers are skipped or
repeated.
5. Ensure every unit in the cascade system is connected properly. Inspect the
cascade cables and ensure all are connected without damage or defect.
Repair or replace any damaged cables.
6. If the problem persists, replace the main control.
Er:30
System Sensor
Short
NOTE: This error will only appear if the boiler is used in a cascaded
system.
This Error Code will go away when system sensor is repaired or
replaced.
1. Check system temperature sensor. Ensure connections are secure.
2. Check system sensor resistance. If resistance is zero, replace the
sensor.
3. If the problem persists, replace the main control.
NOTE: During the error state the units will continue to operate. Boiler
setpoint will be the same as the system sensor setpoint until the issue is
remedied. During normal operation boiler setpoint is defaulted to 20°F
higher than the system setpoint to a maximum of 180°F setting
Er:78
Cascade
Communication
Error
NOTE: This error will only appear in a cascaded system.
1. Turn power OFF and ON at the boiler display panel.
2. If error reappears, ensure all cascaded boilers are powered ON.
3. If error reappears, check Installer Mode parameter 28 at the Leader
boiler. Ensure the number of cascaded units chosen in this parameter
matches the number of cascaded units in the system.
4. If error reappears, check Installer Mode parameter 27 at all cascaded
boilers. Ensure the address number matches that of the connected
boiler (00 for Leader, 01 for Follower 1, etc.) and that no numbers are
skipped or repeated.
5. Ensure every unit in the cascade system is connected properly.
Inspect the cascade cables and ensure all are connected without
damage or defect.
Repair or replace any damaged cables.
6. If the problem persists, replace the main control.
C. Domestic Hot Water ‘Storage Mode’ for Cascade System (continued)
H2384200A
Notes:
Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583
20 Industrial Way, Rochester, NH, USA 03867
1802 Document 1349A
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Bradford White BMFTHW-80 Manuel utilisateur

BMFTHW-80
Bradford White
Marque
Bradford White
Modèle
BMFTHW-80
Taper
Manuel utilisateur
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