Douglas BF 10H-NG Instruction Manual

/
DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 1 of 20
Installation User Instruction Manual
This appliance should not be operated in any circumstances without the front cover in place.
This appliance is not recommended to be installed in a marine environment
Capacity
9.5 Litres/Minute @ 25 deg C rise
Maximum & Minimum inlet water pressure
500Kpa/60Kpa
Relief Pressure
1400 Kpa
Burner Test
Point Pressure
Propane Gas Injector Size mm
NHGC Inlet Pressure
Main Burner
6 X 0.75 + 6 X 0.79
70 Mj/h
0.7 Mj/h
2.75 Kpa 1.50 Kpa
Pilot Burner 0.35
Burner Test
Point Pressure
Natural Gas
injector Size mm
Inlet Pressure NHGC
Main Burner
6X1.25 + 6X1.30
70 Mj/h
0.7 Mj/h
1.13 Kpa 0.55 Kpa
Pilot Burner
0.45
NATURAL GAS
w
^^4
II
A
WARNING

V
DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 2 of 20
(A) Installation
of external flue
terminal. The
outer air duct is
secured with 4
self tapping
screws to the
outer case,
holes provided
4— A
i.
■n.v
B
' ’
Dimensions in mm
A
B
c
D
E
F
G
H I
J
260
450 590
360 205
115
405
255
740
370
The External flue terminal (K) is installed into the
water heater housing (L). The
flue terminal can extend to a maximum distance of 360mm.
The flue terminal (K)
can be cut to suit wall thickness of a lesser thickness.

DOUGLAS & Co. BF 10H-NG BF10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 3 of 20
INSTALLER SECTION.
DOUGLAS & Co. B.F10H
INSTALLATION INSTRUCTIONS: - Flue assembly component identification
Assembly Installation, Typical
Top of Heater &
flue outlet at this
point
EXTERNAL WALL
BALANCED FLUE
ASSEMBLY
INNERFLUE
ELBOW
onto Heater flue
outlet
Sits withinHeater
OUTER AIR DUCT
(Inner flue duct
assembled within)
(A) Outer duct can be cut (refer page 5) to suit wall thickness.
I
BF 10 H Heater to Flue assembly component identification
Illustration of flue terminal installed
I i' ■’
'li
ERNAL WALL
\NCED FLUE
OUTER
I
●i
(Inner fl
assembled within)
B.F. 10H
HEATER
(Outer case)
over the Inner
Flue Elbow
shown above
% L
y -
;r flue duct
I
7Afi mm
maximum
rt-
V
eI^v
t
r
I.
f
I
L-
i-?.■ i
■I
I
Typical Alignments of Inner & Outer Walls

A
DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 4 of 20
DOUGLAS & Co. BF10H INSTALLER SECTION.
HEATER & BALANCED FLUE ASSEMBLY
1. GENERAL DESCRIPTION :
The design of this balanced flue system is intended for situations where access to the external
wall face may be limited. This may be due to height or limited location access to boundary.
The external wall balanced flue must be free from any
combustible materials (such as
TREES, leaves, ETC.).
Install in accordance with AS5601, AS/NZS3500.4.2,
NZS5261 and all local building, water and
gas fitting regulations.
2. LOCATION :
The appliance should be installed in a frost-protected, well ventilated room, as near as possible to the
most frequently used tap. In order to prevent corrosion, make sure that the combustion air is kept free
of aggressive substances. Substances that especially contribute to corrosion are halogenated
hydrocarbons (e.g chlorine, fluorine), which are contained in solvents, paint, adhesives, propellant
gases, various household cleaners, etc. Provide a clearance
of 25 mm around the top and both
sides and 150 mm underneath the appliance
3. WATER SUPPLY:
Pipes of suitable bore according to local conditions and in compliance with pertinent regulations to
be used.
Cold er inlet, and hot water outlet, are marked in
accordance with AGA requirements.
Use only Gate Valve or Full Flow Ball Valve. Non-Return Valves MUST NOT BE USED.
Cold water - flush all lines prior to connection.
Make sure water filter is fitted to inlet point of water valve. Fit inline water strainer where appropriate.
4.
GAS CONNECTION :
Size gas supply pipe as per AS5601. Note: inadequate pipe sizing may void the warranty.
5.
INSTALLATION OF BALANCED FLUE UNIT :
There are four parts to the BF 10 H Balanced Flue Unit.
They are : 1. External Wall Assembly. This assembly comprises the external and internal flue
chambers pre-assembled by Douglas & Co. with the leaf protection grille.
2. Outer Air Duct. This duct carries air to the Heater
burners and also provides a physical
support and atmosphere seal to the System.
3. Inner Flue Elbow. This heat exchange elbow mounts above the burner chamber within
the Heater and carries hot burner exhaust gases into the inner flue duct.
4. Inner Flue Duct. This duct carries hot burner exhaust gases to the external flue outlet.
Both 3 & 4 also exchange heat with the entry air thereby
assisting with combustion preheat.

DOUGLAS & Co. BF 10H-NG BF10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 5 of 20
5
Installation of flue systems : (Continued)
The following photo sequence is intended to assist
in simple installation without mistakes.
The Outer Air Duct is positioned through the wall first. This is cut so that it is flush with the
inner wall or mounting escutcheon and may be flush
with outer wall or extended slightly to suit
external siting requirements.
The Outer Air Duct is cut at the outer non-flanged-^
endand the amount cut is measured.
Cut the equivalent amount from the non-flared end of the Inner Flue Duct. This will
ensure balanced fitting distances.
The External Wall Balanced Flue Assembly may be passed
carefully through the outer air duct after
it has been located in place. The Assembly is positioned
centrally and the attached spring loaded
chains are pulled back and hooked over the chain holding brackets on the Outer Air Duct
Picture shows spring loaded chains stretched
Into place and hooked over brackets. External
Balanced Flue Assembly is not supported and Inner
Flue Duct may be slid into place with non-flared end
Engaging against stops on inside of Assembly Inner
Chamber. (A stop is shown here).

DOUGLAS & Co. BF 10H-NG BF10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 6 of 20
5
installation of flue systems : (Continued)
DIMENSIONS FOR PLANNING FLUE CUT-OUT : All dimensions
are in mm.
NOTE ;
Outer Air Duct distance to Face of External Wall (for
Balanced Flue Assembly)
as shown is 360 mm before any Air Duct is cut to suit actual wall thickness .
The minimum length of the flue is 545 (do not cut past
the internal taper. The
maximum length of the flue is 745 mm.
SIZE OF EXTERNAL WALL BALANCED FLUE ASSEMBLY ONOUTER
WALL

DOUGLAS & Co. BF 10H-NG BF10>LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 7 of 20
5.
Installation of flue systems : (Continued)
The BF 10 H Heater Body (Wall box) may be separated from the Heater for attachment to
the Wall or escutcheon, and alignment of the Flue System. This is not a part of the flue system
however it is referred to in flue installation at this point. The front panel removes from the Heater
Body for set up of the Inner Flue Duct and Elbow through the Wall box, after positioning is checked
and mounting points are determined.
BF 10 H Heater before removal of front cover & internals. Case referred to as Wallbox.
All dimensions are in mm.
UNIT OVERALL DIMENSIONS :
The screws are removed from the bottom of the Heater box and
bottom plate is slid out. Gas burner module, water section with
heat exchanger all slide out in one. This allows the Wall box to
be positioned without any weight on the Outer Air Duct. The Wali
box mounting points should be determined and brackets
positioned into studs or escutcheon support. The Heater should
not be self supporting of the Outer Air Duct alone.
BF 10 H Heater after removal of front cover.
BF
10
H
a
'15 : /●
● itfi!
Heater showing face of Wall box
which is fitted to Wall.
Note the screw holes for connection of Outer Air Duct and
tabs for securing Inner Flue Elbow. Heater Internals are
removed.
This face is against Wall and bracketed to mounting
points before Heater Internals are replaced
When the connections are made to the Outer Air
Duct, the Wall box is completely mounted and
bracketed.
The Heater Internals should now be refitted and
bottom plate slid into place in preparation for the
fitting and alignment of the Inner Flue & Elbow Assembly.

DOUGLAS & Co. BF 10H-NG BF10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 8 of 20
5. Installation of flue systems : (Continued)
The Inner Flue Duct (correctly cut to length) has the Flared end connected to the Inner Flue Elbow
by means of self tapping screws or pop rivets as shown :
. I Ensure that there are no air gaps in the
connection of the components as this will
result in the Pilot burner going out.
Now the Inner Flue Duct & Elbow Assembly
is slid through the Outer Air Duct and the non
flared end is located into the Internal Flue
Chamber of the External Wall Balanced Flue
Assembly, (as shown below)
The Inner Flue Elbow is very carefully located over the top
of the Water Chamber Heat Exchanger so as to fully
cover the chamber and align, with the copper top rim of
the Heat Exchanger true and square within the Elbow.
The elbow is secured with the seif tappers screws to the
tabs on the Wall box casing. The exhaust flue assembly
thus created should be examined to ensure good
alignment, seal and support.
The bottom plate is now secured in the properly aligned
position and screws re-fastened. The hot and Cold Water
Supply and Gas Supply Connections are made at this
stage.
Heater
appearance at
this stage is
shown.
I Note : All connections are made in accordance with
AS/NZS 3500.4 & AS 5601. All Water & Gas connections
are leak tested. It is most important to replace front cover
I before operating lighting sequence and test operation of
I burner fire-up.
: The following notes apply to Connections, Testing & Hand
^ over.

DOUGLAS & Co. BF 10H-NG BF10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 9 of 20
6.
Pipe Connections, Water Pressure, Testing, and Hand over advice.
Pipe Connections;
Cold water 12 mm flexible tail pipe,
pipe. A gas cock must be installed in the supply line with provision to disconnect the appliance for
service. A gate valve or full flow ball valve (fixed mechanism) must be installed on the cold water
supply line. A non-return valve MUST NOT be fitted.
Hot water 12 flexible mm pipe.
Gas 12 mm tail
Heat Exchanger / Controls Module viewed from
Underside out of Wall Box. Note for reference point:
Control Knob
--.Gas Inlet 12 mm Connection
—Cold Water 12 mm flexible Connection
Hot Water 12 mm flexible Outlet
DO NOT MIX UP WATER &GASCONNECTIONS
View of Connector Tails on Cold Water Inlet & Gas Inlet
from front of Heat Exchanger /
Controls Module.
Viewed from front, out
of Wall box
Hot water outlet
Gas Inlet 12 mm Connection.
Cold Water 12 mm Connection
DO NOT MIX UP WATER &GASCONNECTIONS

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 10 of 20
6.
Pipe Connections, Water Pressure. Testing, and Hand over advice, (cont’d)
Water Pressure:
The water valve pressure rating (refit rating label) should be compatible with local supply conditions
with Maximum/Minimum inlet water pressure 500Kpa/60
Kpa at the Heater. If water supply exceeds
500 Kpa install a pressure limiting valve. In areas of extreme water pressure, two stage sequential
pressure limit at boundary supply point and then at Heater appliance will be required.
Water Temperature Adjustment;
To increase the water temperature (decrease water flow), turn the knob clockwise. To reduce water
temperature (increase water flow), turn the knob anti-clockwise.
Purging of the pilot.
To establish pilot, turn the hot tap on and off till pilot is established. The heater has automatic
ignition which will self purge the pilot each time the heater is used.
Maintenance:
Douglas & Co. recommend that the Heater Is inspected for condition and the burner chamber / heat
exchanger, operating components and flue system is
cleaned periodically. The frequency is
dependent upon use and should be carried out by authorized
service person. The minimum
recommended frequency is annually.
Hot Water Safety;
Scalding occurs above 50 deg C. As this appliance is
capable of heating above 50 deg C. hot
water safety should be observed.
Final Testing & Commissioning :
If the Pilot burner will not light, turn off the hot
tap, wait for 5 minutes before attempting relight. If the
appliance does not light or burns with a yellow flame,
leaks water or a gas smell is evident, turn off
and investigate to remedy installation. All hot water
taps should be off when attempting relight. The
installer shall test the appliance to ensure that it
operates according to the manufacturer’s
specification. The installer must demonstrate the operation
of the appliance to the consumer and
hand the instructions to the consumer on completion.
Check List should be handed to Customer with the following
indicators / tests completed :
Gas Line checked.
Heater fully commissioned.
OPERATION.
BURNER AS PER INSTRUCTIONS ON PAGE 11 .& 12
Water supply and connections checked. Flue sealing & functioning.
Date of Installation recorded.
Operation / Lighting booklet handed to Customer. Commisioning of main
Customer advised on
Customer to be advised that at any time gas smell is
evident, the gas valve should be turned of to
isolate and either the local gas authority, or authorized
service person contacted.
FAILURE TOHAVE APPLIANCE INSTALLED BY QUALIFIED INSTALLER
IN ACCORDANCE
WITH THESE INSTALLATION GUIDELINES WILLVOID WARRANTY.

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 11 of 20
Commissioning
Inlet pressure adjustment
Burner pressures have been adjusted in the factory, however adjustment may be required upon
installation.
Attach a manometer to the inlet pressure test point located on the gas inlet pipe.
Inlet gas pressure should be adjusted at the appliance regulator to 1.13 Kpa for Natural Gas and
2.75 Kpa for LP gas.
These measurements must be set while the unit is operating.
Burner pressure adjustment
Accessing the adjusting screw
Remove the front cover from the heater.
Connecting the manometer
Loosen the burner test point captive screw (Picture A)
Connect the manometer to the burner pressure measuring point.
Burner Test Point
Picture A
Gas Measuring Point

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 12 of 20
Maximum gas flow adjustment
6>
D
r
m
i
1^'
I
i'
p
«i
.i ;
I
I
o
^>1
I
4
7
I
7
I
s.
H
w
I
\
Inlet gas
pressure-
test point
Maximum gas
flow adjusting
screw
I
r
Remove the seal from the adjusting screw
Turn on the heater with the gas selector set to the left (maximum position).
Open various hot water taps.
Using the adjusting screw regulate the gas pressure until the values indicated in the table C are
achieved.
Seal the adjusting screw once again.
Minimum gas flow adjustment
The minimum gas flow adjustment is performed automatically after the adjustment of the
maximum gas flow
1
LP Gas
Natural Gas
Model
1.50 (Kpa)
0.55 (Kpa) BF10H
MAX Burner Pressure
Conversion to a different type of gas
Use only original conversion parts. The conversion must only be performed by a qualified
technician. Original Conversion kits are supplied with assembly instructions.

«
DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 13 of 20
1 2 3 4 5
Gas System
32
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I i
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31
i
X'
I
- Oi.---
c.
K
6
30
15
\
29
28
I
8
/
27
1,
33
26
10
f-
9
25
11 1
s .
12
24
13
E-
=.fcr:t
><luia
23
14
I
22
1C
Pilot burner
Ignition Electrode
lonisslion probe
Heal exchanger
Main burner
Iniector
Slow Ignition valve
Venturi
Temperalure/vnliinie selector
Water valve
Plunger
V/ater How regulator
Water filter
Hydrogencralor
Cold water pipe
1
17
Diaphragin
Ivfaingas valve
Maximum gas adiiisting screw
Gas supply pipe
Gas filter
Hot water pipe
Ignition unit
Temperature sensor
Servo valve
Power selector
Gas valve
Pilot valve
2
18
3
Id
420
S
21
622
0
23
3 24
10 25
11 26
12
27
13
28
14 29
Pilot injector
Pilot gas pipe
Overtenipeiature switch
Flue gas safety device
ilelief
15 30
16
31
32
33
●/Drain ●●●trow

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 14 of 20
Electrical System
lemperAUireiensnr
Pilot solenoid (Normally Closed)
Oliipltragni VJlve
Main Solertoid (Normally Open)
Hydfogen«ator
LED ● Burner status diet*
0
jgii.iion dcctrotJe
unit
5vrildi/LED- Low water pressure nrtPuitDr
Digital desplay
loiiisiitian piubi;
Flue gas safely device
OviiituiniJeiatuie switcli
1
9
2
10
3
11
4
12
S
13
6
7
Function
This gas heater is equipped with automatic electronic ignition to simplify operation. To activate, just turn on
switch. After this, automatic ignition occurs whenever a hot water tap is opened. First the pilot burner is lit and
approximateiy four seconds iater the main burner iights. Once the main burner lights, the pilot burner is
extinguished, the flame is supervised by the main burner.

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 15 of 20
Principle of operation
When a hot water outlet is opened, water flows into the inlet of the appliance traveling through a fine
mesh water filter.
The water then passes through the volumetric water governor into the bottom chamber of the water
section. Water is then released through 2 passages (one determined by setting screw and one via
the volume selector), which then passes through the venture on the outlet of the water valve.
This venture effect draws the water off the top chamber of the water valve and the pressure of the
water In the bottom chamber pushes the diaphragm up and in turn opens the gas valve.
When the water passes out of the water valve, this
then flows through the hydrogenerator, which generates
3VAC to activate the ignition and check the safety devices of the appliance.
The voltage then passes through 2 safety devices, over the temperature cutout and the flue safety device.
Provided both devices are sound, the voltage then passes to the ICU (Ignition Control Unit). Simultaneously
the ICU starts ignition and sends power to the Pilot Solenoid valve, which in turn opens.
Once a flame is established, the ICU then sends power to the main solenoid which closes, this allows the
pilot burner to burn the gas off the top chamber of
the gas valve and in turn allows the gas valve to open and
the main burner to ignite.
Once the main burner has ignited and rectified, the
pilot will eventually extinguish, and the burner is
monitored via the flame rod.
At all times while the unit is in operation, the safety devices monitor the appliance and the outlet temperature
is displayed on the ICU and if an error occurs, a code
is displayed on the ICU.

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 16 of 20
Operating Instructions
(D
m
(D
CD
CD
1
Temperature/Error code
Malfunction Indicator
Temperature Measurement Units
Heater ON indicator
2
3
4
Turning ON/OFF
Press button to turn ON or OFF
Water Flow Adjustment
Turn anti clockwise to decrease water flow & increase
temperature

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 17 of 20
Operating Instructions Continued
Gas Adjustment
turn Clockwise to use less gas (Lower water temperature) Turn Anti clockwise to use maximum Gas (Higher water
temperature)
Indicator Lamps
Hot water tap ON, LED ON
If RED LED flashes during
water flow
operation, check

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 18 of 20
Fault Diagnosis
$6!^l9n
●;V.2,rj
?if{
Chock switch position.
The heater does not ignite and
digital display Is turned off.
Sv/itch turned off.
Call a qualified technician.
Slow and difficult ignition of the
burner..
Reduced w'ater flow.
Call a qualified technician.
Red LED in switch flashes.
Reduced water flov/.
Check the termperature seiector position
and adjust it according to the desired
water temperature.
Water at low temperature.
If sufficient gas appears to be available
call a qualified technician.
Water Is not heated, no flame, Insufficient gas supply. Gas Cylin
ders may be empty
Wait iO minutes and restart the heater.
If the problem persists, call a qualified
technician.
Temperature limiter has tripped
Digital display shows "E9”.
Vent the area. Wait 10 minutes and
restart the heater. If the problem per
sists, call a qualified technician.
Digital display shows "A4".
Flue gas safety device has tripped
Insuficient contact of the tempera
ture sensor.
Cali a qualified technician. . incorrect temperature informa
tion in the appliance digital dis
play.
Digital display shows "El”.
Reduce the water temperature using the
gas and/or temperature adjustment
selector. If the problem persists, call a
qualified technician.
Water temperature sensor has
tripped (outlet water temperature
above 85 ®C).
Digital display shows "A7’ Cali a qualified technician. Temperature sensor incorrectly
connected.
Call a qualified technician.
Temperature sensor defective.
Digital display shows "F7” or
Turn the heater off and on, if the prob
lem persists, call a qualified technician.
Blocked Heater.
EO”.
Digital display shows “EA”. There is spark but the main burner
does not ignite, heater blockod.No
ionisation probe signal.
Check;
● Gas supply, position of valves, empty
LPG cylinders.
Digital display sliows “FO”.
Power was activated with a hot
water tap running.
Turn the water off and on. if the problem
persists, call a qualified technician.
Call a quaMfied technicjan.^^^''
Reduced-water flQW,^',
Insufficient water supply pressure.
-\
Si
; CalLaqualified technician ,
'^;6al.la qualifiedjechniciah
Dirty taps or mixers.
isV
Gas valve blocked.
NX ●X >«'
Call a qualified technician
● Heat exchanger blocked
(limescale).
. ... - ●
●'XS'-'
8.

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 19 of 20
WARRANTY.
Douglas & Co., (The Company), as manufacturer of the BF 10 H Balanced Flue Heater and Flue
System, Warrants Its products to be free from faults
and defects in workmanship and materials. Its
obligations pursuant to this Warranty being limited
to the repair or replacement, at the option of the
manufacturer, and subject to the terms and conditions stated below, of any component part which
shall be defective for use under normal conditions of use.
Terms and Conditions
1.
The manufacturer is at liberty to alter the design or construction for the products not
withstanding that the product may have been sold by description or sample, even though
alterations made have been introduced from the date
of Contract and the date of Delivery
provided that the products are of the same or similar
Quality and are fit for the purposes
for which they are purchased.
Such alterations shall not constitute a defect in design or construction under this
Warranty.
The Warranty shall be limited to the replacement or
repair, at the option of the
manufacturer, of any defective products and of such parts as have been damaged in
consequence of the defect. The company is excluded
to the extent allowable by law from
responsibility for any consequential loss including :
injury to persons,
injury to property,
economic loss,
pain and suffering,
any legal or other expenses or other damages flowing from any manufacturing fault
or defect.
The company shall be under no obligation to return
parts replaced at the option of the
company pursuant to this Warranty.
This Warranty shall not apply to the following :
if the product is sold and repaired or altered by any third party without the
manufacturers consent,
any parts not manufactured or sold by the manufacturer
are used in replacement or
repair,
if the products are not used with proper care for a
purpose for which they are sold in
accordance with specified instructions for use,
if changes occur in the condition or the operation
or Quality of the products due to
incorrect storage or mounting or due to climate or other Influences,
in respect of fault in construction or defects due to the use of unsuitable materials if
such method of construction or use of material has
been specified by the Purchaser
If the heat exchanger fails during the Warranty period,
the heat exchanger must be
forwarded to the manufacturers office for a Warranty
claim, parts only. Freight charges
are not covered by the manufacturer.
This Warranty does not cover the replacement of parts
when such replacement parts are
necessitated by lack of maintenance or as a result of normal wear and tear.
2.
3.
4.
5.
6.

DOUGLAS & Co. BF 10H-NG BF 10-LPG HEATER UNITS
INSTALLATION USER INSTRUCTION MANUAL
Page 19 of 20
WARRANTY.
Douglas & Co., {The Company), as manufacturer of the BF 10 H Balanced Flue Heater and Flue
System, Warrants its products to be free from faults
and defects in workmanship and materials. Its
obligations pursuant to this Warranty being limited
to the repair or replacement, at the option of the
manufacturer, and subject to the terms and conditions
stated below, of any component part which
shall be defective for use under normal conditions of use.
Terms and Conditions
1.
The manufacturer is at liberty to alter the design
or construction for the products not
withstanding that the product may have been sold by description
or sample, even though
alterations made have been introduced from the date
of Contract and the date of Delivery
provided that the products are of the same or similar
Quality and are fit for the purposes
for which they are purchased.
Such alterations shall not constitute a defect in design or construction under this
Warranty.
The Warranty shall be limited to the replacement or
repair, at the option of the
manufacturer, of any defective products and of such
parts as have been damaged in
consequence of the defect. The company is excluded
to the extent allowable by law from
responsibility for any consequential loss including :
injury to persons,
injury to property,
economic loss,
pain and suffering,
any legal or other expenses or other damages flowing
from any manufacturing fault
or defect.
The company shall be under no obligation to return
parts replaced at the option of the
company pursuant to this Warranty.
This Warranty shall not apply to the following ;
if the product is sold and repaired or altered by any
third party without the
manufacturers consent,
any parts not manufactured or sold by the manufacturer
are used in replacement or
repair,
if the products are not used with proper care for a
purpose for which they are sold in
accordance with specified instructions for use,
if changes occur in the condition or the operation
or Quality of the products due to
incorrect storage or mounting or due to climate or
other influences,
in respect of fault in construction or defects due
to the use of unsuitable materials if
such method of construction or use of material has
been specified by the Purchaser
If the heat exchanger fails during the Warranty period,
the heat exchanger must be
forwarded to the manufacturers office for a Warranty
claim, parts only. Freight charges
are not covered by the manufacturer.
This Warranty does not cover the replacement of parts
when such replacement parts
necessitated by lack of maintenance or as a result
of normal wear and tear.
2.
3.
4.
5.
6.
are