Potterton Osprey 2 CFL 125 User guide

Osprey 2 CFL
125 - 150 - 180 - 220
Gas Fired Floor Standing Boiler
Installation and
Servicing Instructions
Please leave these instructions with the user

2
Natural Gas
Potterton Osprey 2 CFL 125
G.C.No41 590 54
Potterton Osprey 2 CFL 150
G.C.No41 590 55
Potterton Osprey 2 CFL 180
G.C.No41 590 56
Potterton Osprey 2 CFL 220
G.C.No41 590 57
The boiler meets the requirements of Statutory
Instrument “ The Boiler (Efficiency) Regulations
1993 No3083” and is deemed to meet the
requirements of Directive 92/42/EEC on the energy
efficiency requirements for new hot water boilers
fired with liquid or gaseous fuels:-
Type test for purpose of Regulation 5 certified by:
Notified Body 0049.
Product/Production certified by:
Notified Body 0049.
For GB/IE only.

3
1.0 Introduction 4
2.0 General Layout 5
3.0 Technical Data 6
4.0 Dimensions 7
5.0 System Details 8
6.0 Site Requirements 10
7.0 Installation 13
8.0 Commissioning the Boiler 15
9.0 Servicing the Boiler 17
10.0 Changing Components 19
11.0 Illustrated Wiring Diagram 23
12.0 Fault Finding 24
13.0 Short Parts List 28
Section Page
Contents

Potterton declare that no substances harmful to
health are contained in the appliance or used
during appliance manufacture.
1.1 Description
1. The Potterton Osprey 2 CFL is a fully automatic
gas fired floor standing conventionally flued boiler
with a cast iron heat exchanger.
2. The boiler is designed for use with fully pumped
open vented or sealed water systems with an
indirect hot water cylinder.
3. The boiler is available in outputs of 35.0, 43.0,
52.8 and 64.5kW
4. It is designed for use on Natural Gas (G20).
5. The boiler data badge is positioned on the boiler
inner front panel.
6. The boiler is intended to be installed in
residential / commercial / light industrial E.M.C.
environments on a governed meter supply only.
7. All systems must be thoroughly flushed and
treated with inhibitor (see section 6.2).
1.2 Installation
1. The appliance is suitable for installation only in
G.B. and I.E. and should be installed in accordance
with the rules in force. For Ireland install in
accordance with I.S.813 “Installation of Gas
Appliances”. The installation must be carried out by
a CORGI Registered Installer or other competent
person and be in accordance with the relevant
requirements of current Gas Safety (Installation
and Use) Regulations, the Building Regulations
(Scotland) (Consolidation), the Local Building
Regulations, the Current I.E.E. Wiring Regulations
and the bye laws of the Local Water Undertaking.
Where no specific instructions are given, reference
should be made to the relevant BRITISH
STANDARD CODES OF PRACTICE.
1.0 Introduction
4
“Benchmark” Log Book
As part of the industry-wide “Benchmark”initiative all Baxi boilers now
include an Installation, Commissioning and Service Record Log Book.
Please read the Log Book carefully and complete all sections relevant to
the appliance and installation. These include sections on the type of
controls employed, flushing the system, burner operating pressure etc.
The details of the Log Book will be required in the event of any warranty
work. Also, there is a section to be completed at each subsequent regular
service visit. The Log Book must be left with the user.
Fig. 1
NOTE: This appliance must be installed in
accordance with the manufacturer’s instructions
and the regulations in force. Read the instructions
fully before installing or using the appliance.
Inner Front Panel
Data Badge

2.0 General Layout
5
2.1 Layout
1. Flue Spigot
2. Draught Diverter
3. Cable Clamp
4. Flue Safety Thermostat
5. Flow Connection
6. Return Connection
7. Burner
8. Gas Inlet Connection
9. Burner Ignition Control
10. Boiler Drain and Cap
11. Gas Valve
12. Burner Manifold
13. Pilot Feed Pipe
14. Pressure Test Point
15. Pilot
16. Overheat Thermostat
17. Boiler Thermostat
18. Inner Front Panel
19. Control Panel
20. Cleaning Brush
21. Heat Exchanger
22. Flue Hood
23. Boiler Safety Overheat Neon
24. Flame Failure Neon
25. Burner On Neon
26. Power On Neon
27. Boiler Safety Overheat Reset
28. Flame Failure Reset
29. On/Off Button
30. Temperature Control
RESET ON / OFF
Osprey 2 RESET
Fig. 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
27 30
2524
28 29
26
Fig. 3

3.0 Technical Data
6
Outercase Dimensions
Casing Height - 850mm
Casing Width (125) - 600mm
Casing Width (150) - 695mm
Casing Width (180) - 790mm
Casing Width (220) - 885mm
Casing Depth (125/150) - 600mm
Casing Depth (180/220) - 650mm
Clearances
LH Side 150mm Min
RH Side 150mm Min
Top 700mm Min
Front 700mm Min
Rear 200mm Min
Weights kg
125 140
150 170
180 200
220 230
Connections
Gas Supply - 22mm compression
Flow - 11/4”steel pipe, taper thread
Return - 11/4”steel pipe, taper thread
Recommended System
Temperature Drop 11°C20°F
Maximum Flow Temperature
85°C
Heat Output 125 150
kW 35.0 43.0
Btu/h 119,443 146,745
180 220
kW 52.8 64.5
Btu/h 180,189 220,117
Electrical Supply 230V~ 50Hz
Power Consumption 25W
(excluding pump)
External Fuse Rating 3A
External Controls 230V switching
Electrical Protection IP20
(Appliance must be connected to an
earthed supply)
Appliance Category CAT 2H
Gas Rate 125 150
m3/h 4.0 5.06
ft3/h 142 179
180 220
m3/h 6.0 7.3
ft3/h 212 258
Burner Pressure 125 150
mbar 11.2 ± 0.4 11.4 ± 0.4
180 220
mbar 11.0 ± 0.4 11.8 ± 0.4
Inlet Pressure (Natural Gas Only)
mbar 20
in wg 8
Burner Injector
2.6mm Diameter
Appliance Type B11BS
NOxClass
150 & 180 3
125 & 220 2
This value is used in the UK Government’s
Standard Assessment Procedure (SAP) for
energy rating of dwellings. The test data from
which it has been calculated have been
certified by 0049.
SEDBUK Declaration For
Potterton Osprey 2 CFL
The seasonal efficiency (SEDBUK)
125: 78.6 %
150: 78.0 %
180: 78.3 %
220: 78.0 %
60
40
20
0
0102030405060
125
150
Flow Rate (l/min)
Pressure Drop (mbar)
70 80
125 and 150
60
80
100
120
40
20
0
0102030405060
180
220
Flow Rate (l/min)
180 and 220
Pressure Drop (mbar)
70 80 90 100 110 120
Heat Input (gross) 125 150
kW 43.07 53.28
Btu/h 146,983 181,827
180 220
kW 64.82 79.69
Btu/h 221,209 271,956 Water Content litres
125 24
150 29
180 33
220 38
Working Head
Minimum 0.5m
Maximum 30m (3 bar)
Flue Spigot Diameter
125/150 184mm
180/220 241mm
Hydraulic Resistance Charts
Pilot Injector
0.45mm Diameter

4.0 Dimensions
7
Dimensions (mm)
A
600
695
790
885
Model
125
150
180
220
B
332.5
380
427.5
475
C
850
850
850
850
D
511
511
511
511
E
600
600
650
650
A
C
B
D
E
Front Side
Fig. 4 Fig. 5
F
F
184
184
241
241

5.0 System Details
8
5.1 Primary Circuit
1. The appliance is suitable for fully pumped
systems only. The system can be open vented
or sealed.
2. A sealed system must incorporate the
following:-
•Safety Valve
•Pressure Gauge
•Expansion Vessel
•Filling Point
Reference must be made to the specific sections
of BS5449 relating to sealed systems.
Treatment of Water Circulating Systems
•All recirculatory water systems will be subject
to corrosion unless an appropriate water
treatment is applied. This means that the
efficiency of the system will deteriorate as
corrosion sludge accumulates within the system,
risking damage to pump and valves, boiler noise
and circulation problems.
•For optimum performance after installation this
boiler and its associated central heating system
must be flushed in accordance with the
guidelines given in BS 7593 “Treatment of water
in domestic hot water central heating systems”.
•This must involve the use of a proprietary
cleanser, such as BetzDearborn Sentinel X300
or X400, or Fernox Superfloc. Full instructions
are supplied with the products, but for immediate
information please contact BetzDearborn (0151
420 9563) or Fernox (01799 550 811) directly.
•For long term protection against corrosion and
scale, after flushing it is recommended that an
inhibitor such as BetzDearborn Sentinel X100,
or Fernox MB-1 or Copal is dosed in accordance
with the guidelines given in BS 7593.
Failure to flush and add inhibitor to the system
may invalidate the appliance warranty.
•It is important to check the inhibitor
concentration after installation, system
modification and at every service in accordance
with the manufacturer’s instructions. (Test kits
are available from inhibitor stockists.)
•For information or advice regarding any of the
above contact the Potterton Helpline.

5.0 System Details
9
5.2 Bypass
1. The boiler is fitted with a pump overrun device
which allows the removal of residual heat from
the boiler. The system design must therefore
always provide an open circuit to allow water
circulation between the boiler flow and return.
2. Any bypass must be capable of allowing a
minimum flow rate of 8l/min and be able to
dissipate at least 2kW.
5.3 System Control
1. The boiler is intended for use in a heating
system that incorporates external controls, i.e. a
minimum of a timer device.
2. For optimum operating conditions and
maximum economy the fitting of room and
cylinder thermostats is recommended.
3. The boiler should be controlled so that it
operates on demand only.

6.0 Site Requirements
10
6.1 Information
1. The installation must be carried out by a
CORGI Registered Installer or other registered
competent person and be in accordance with the
relevant requirements of the current Gas Safety
(Installation and Use) Regulations, the Building
Regulations (Scotland)(Consolidation), the Local
Building Regulations, the current I.E.E. Wiring
Regulations and the bye laws of the Local Water
Undertaking. Where no specific instruction is
given reference should be made to the relevant
British Standard Codes of Practice. For Ireland
install in accordance with IS 813 “Installation of
Gas Appliances”.
6.2 B.S. Codes of Practice
WARNING - The addition of anything that
may interfere with the normal operation of the
appliance without the express written
permission of Potterton could invalidate the
appliance warranty and infringe the Gas
Safety (Installation and Use) Regulations.
6.3 Clearances (Fig. 6 & 7)
1. Minimum clearances must be provided around
the boiler as follows:-
Each Side - 150mm
Top - 700mm
Front - 700mm
Rear - 200mm
Fig. 6
Fig. 7
STANDARD
B.S. 6891
B.S. 5440: Pt 1
B.S. 5440: Pt 2
B.S. 5546
B.S. 7074
B.S. 5449
B.S. 6798
SCOPE
Gas Installation.
Flues.
Ventilation
Installation of hot water supplies
for domestic purposes.
Expansion vessels and ancillary
equipment for sealed water systems.
Forced circulation hot water systems.
Installation of gas fired boilers.
700mm
700mm
700mm
200mm
150mm
150mm
Minimum Side
Clearances
Minimum Front &
Rear Clearances

6.0 Site Requirements
11
6.4 Location
1. The boiler must be positioned on a flat and level
floor or base which must be capable of supporting
the full operational weight of the boiler. The flue
must pass through an outside roof or wall and
discharge to atmosphere in a position permitting
satisfactory removal of combustion products.
2. The boiler should be fitted within the building
unless otherwise protected by a suitable enclosure
i.e. garage or outhouse. (The 120 and 150 boilers
may be fitted inside a cupboard - see Section 6.7).
3. If the boiler or any part of the system is located
in an area that may be subjected to low ambient
temperatures, it is recommended that a suitable
frost protection device is incorporated into the
control system.
4. If the boiler is fitted in a room containing a bath
or shower reference must be made to the current
I.E.E. Wiring Regulations and Building
Regulations. If the boiler is to be fitted into a
building of timber frame construction then
reference must be made to the current edition of
Institute of Gas Engineers Publication IGE/UP/7
(Gas Installations in Timber Framed Housing).
6.5 Gas Supply
1. The gas installation should be in accordance
with BS6891.
2. The connection to the appliance is a 22mm
copper tail. This is connected to the gas service
cock (Fig. 9).
3. Ensure that the pipework from the meter to the
appliance is of adequate size. Do not use pipes of
a smaller diameter than the boiler gas connection
(22mm).
6.6 Electrical Supply
1. External wiring must be correctly earthed,
polarised and in accordance with current I.E.E.
Wiring Regulations.
2. The mains supply is 230V ~ 50Hz fused at 3A.
NOTE: The method of connection to the electricity
supply must facilitate complete electrical isolation
of the appliance.
Connection may be via a fused double-pole
isolator with a contact separation of at least 3mm
in all poles and servicing the boiler and system
controls only.
Fig. 8
Fig. 9
Gas Cock

6.0 Site Requirements
12
6.7 Flues & Ventilation
1. The room or space of installation must be
ventilated to ensure the correct and safe
operation of the boiler.
2. 125 and 150 models require one air vent, at
high or low level. High and low level vents are
required for 180 and 220 models. The vents must
have a free area as follows:-
125 models 163cm2
150 models 208cm2
180 models 281cm2(high)
180 models 562cm2 (low)
220 models 315cm2 (high)
220 models 630cm2 (low)
3. The vent(s) must communicate directly
between outside and the room or space of
installation, or using suitable ducting (all models)
or indirectly via an opening of at least the same
area (125 and 150 models only).
4. 125 and 150 models may be fitted in a
cupboard or compartment within the room or
space of installation providing the cupboard or
compartment is ventilated as follows:-
125 models 388cm2(high)
125 models 776cm2 (low)
150 models 478cm2 (high)
150 models 956cm2 (low)
Both vents must communicate with the same
room or be on the same wall to outside air.
5. 180 and 220 models cannot be fitted in a
compartment except of the type specified in
BS6644 using a monodraught system.
6. The flue system should be lined throughout its
length.
7. Minimum flue length is 1m. There should be at
least 1m of vertical flue from the boiler flue
socket, and horizontal runs and 90°bends should
be avoided.
8. If an existing chimney is used it must be fully
swept before lining or connecting the boiler.
Precautions should be taken to avoid
condensation forming in the flue.
9. The flue diameter must be at least the same
diameter as the connection on the boiler draught
diverter.
10. A short length of purpose made flue may be
required to connect the boiler flue spigot to the
flue system.
11. The flue terminal must be of an approved
type and be positioned above roof level.

7.0 Installation
13
7.1 Initial Preparation
The gas supply, gas type and pressure must
be checked for suitability before connection.
1. Ensure that the floor or base on to which the
boiler is to be fitted is clean and free from debris.
2. Install any pipework that will be behind the
boiler, and any appropriate flue components.
3. Manoeuvre the boiler into position, seeking
assistance as necessary. Check the clearances
as shown in Section 6.3.
4. Undo the two securing screws and remove the
top panel.
5. Disengage the front panel from the retaining
magnets and hinge forwards. Unhook the panel
from the lower hinge pins (Fig. 10) and place to
the right hand side, taking care not to stretch the
earth wire.
6. Remove the flue spigot from inside the case
and fit it to the boiler draught diverter (Fig. 11).
Important: Only use the flue spigot supplied.
Do not use a proprietary item.
7. Connect the gas supply pipe and the system
flow and return connections to the boiler (Fig. 12).
8. Connect the flue system to the flue spigot. Any
flue pipe must be at least the same diameter as
the connection on the boiler draught diverter
Securing
Screws
Top Panel
Magnets
Front Panel
Flue Spigot
Return
Connection
Gas Inlet
Flow
Connection
Fig. 10
Fig. 11
Fig. 12
Boiler Draught
Diverter
Connection

7.0 Installation
14
7.2 Making the Electrical Connection
1. Undo the two securing screws from the rear
of the top panel. Remove the panel (Fig. 13).
2. Swivel the two retaining plates through 90°.
Lift the control box slightly and allow it to hinge
forwards (Figs. 14 & 15). Undo the two retaining
screws and remove the cover panel.
3. The input wiring to the boiler and the pump
feed from the boiler should be routed through
the grommet/clamps in the control box rear
panel (Fig. 16).
4. Remove the clamps from the panel and slit
the grommets with a suitable knife or blade.
5. Determine the length of the wiring and secure
in the clamps.
6. Connect live, neutral, earth, and switched live
to L, N, & SL of the terminal strip. The pump
live, neutral and earth should be connected to
PL, PN & of the terminal strip (Fig. 17).
1.4
Securing
Screws
Top Panel
Front Panel
Cover Panel
Fig. 13
Fig. 15
Fig. 16
LNLHT
SWL
View inside control box with cover
panel removed.
Terminal Strip Earth Point
Burner Ignition
Control
Connection
Cable Clamps
Grommet
Temperature
Control
Thermostat
Fig. 14
LNLHT
SWL
Fig. 17 Terminal Strip
Magnets
Safety
Thermostat

8.0 Commissioning the Boiler
15
8.1 Commissioning the Boiler
1. Reference should be made to BS 5449
Section 5 when commissioning the boiler.
2. Open the water supply to the boiler.
3. The system must be flushed in accordance
with BS 7593, Section 5.1 of these instructions
and the flushing agent manufacturers
instructions.
4. Turn the gas supply on and purge the system
according to BS 6891.
5. Test for gas soundness.
8.2 Checking the Burner Pressure
1. Slacken the pressure test point sealing screw
and connect a pressure gauge (Fig. 19).
2. Turn on the gas and electrical supplies to the
boiler and ensure that all external controls are
calling for heat.
3. Set the temperature control to maximum
(Fig. 18).
4. Check the burner setting pressure (see
Section 4.0 “Technical Data”).
5. If necessary adjust the pressure by removing
the gas valve governor cover and turning the
screw to achieve the required pressure (Fig. 20).
5. Turn the boiler off and reassemble in reverse
order. Tighten the pressure test point sealing
screw (Fig. 19).
Thermostat Knob
Fig. 19
Fig. 18
Fig. 20
LH View of Gas
Valve
Governor Cover Screw
Inlet Pressure Test Point
Burner Pressure Test Point

8.0 Commissioning the Boiler
16
8.3 Completion
1. Flush the system again and treat it in
accordance with BS7593, Section 5.1 of these
instructions and the flushing agent and inhibitor
manufacturer’s instructions.
2. Carefully read and complete all sections of the
“Benchmark”Installation, Commissioning and
Service Record Log Book that are relevant to the
appliance and installation. The details of the Log
Book will be required in the event of any
warranty work. The Log Book must be handed to
the user for safe keeping and each subsequent
regular service visit recorded.
3. Instruct the user in the operation of the boiler
controls and the function and resetting of the
various safety devices
4. Hand over the User’s Operating, Installation
and Servicing Instructions and the Log Book,
giving advice on the necessity of regular
servicing.
5. Refit the outercase front and top panels
(Fig. 21).
Securing
Screws
Top Panel
Front Panel
Fig. 21
Magnets

9.0 Servicing the Boiler
17
9.1 Annual Servicing
1. For reasons of safety and economy, it is
recommended that the boiler is serviced
annually. Servicing must be performed by a
competent person.
2. After servicing, complete the relevant section
of the “Benchmark”Installation, Commissioning
and Service Record Log Book. This should be in
the possession of the user.
3. Ensure that the boiler is cool.
4. Ensure that both the gas and electrical
supplies to the boiler are isolated.
5. Undo the two securing screws from the rear of
the top panel. Remove the panel (Fig. 22).
6. Disengage the front panel from the retaining
magnets and hinge forwards. Unhook the panel
from the lower hinge pins (Fig. 22) and place to
the right hand side, taking care not to stretch the
earth wire.
7. Undo the wing nuts securing the combustion
box top panel (Fig. 23). Remove the panel.
8. Undo the disconnecting union on the gas inlet.
Remove the screw securing the burner ignition
control to the gas valve. Draw the control off the
valve (Fig. 24).
Securing
Screws
Top Panel
Front Panel
Wing Nuts
Combustion Box
Top Panel
Burner Ignition
Control
Securing Screw
Gas Valve
Disconnecting Union
Sealing Washer
Gas Cock
Fig. 22
Fig. 23
Fig. 24
Magnets

9.0 Servicing the Boiler
18
9.1 Annual Servicing (Cont)
9. Undo the two nuts securing the valve, injector
manifold and burner assembly to the boiler
(Figs. 25 & 27).
10. Hold the manifold and carefully draw the
assembly away from the boiler. Retain the
washer from the gas inlet connection.
11. Brush any dirt or debris from the burner
skins. Examine the burners for blocked ports.
Any blockage can be removed using a fine wire
brush.
12. Inspect the pilot assembly, electrodes and
injectors (Fig. 26). Replace if necessary.
13. Ensure that the spark and sensing leads are
clipped into the separation brackets and do not
cross over each other.
14. Slide a suitable sheet of paper or cloth under
the boiler heat exchanger (Fig. 29).
15. Unclip the brush from the top edge of the left
hand side panel clean between the boiler fins
(Fig. 28 & 29). Check for any blockage.
16. Carefully withdraw the sheet and dispose of
in a proper manner. Check under the boiler and
remove any fallen dirt or debris.
17. Reassemble in reverse order of dismantling
and recommission.
18. Complete the relevant section of the
“Benchmark”Installation, Commissioning and
Service Record Log Book and hand it back to
the user.
Securing Nuts
Manifold
Pilot Assembly
Fig. 25
Fig. 26
Fig. 27
Fig. 28
Fig. 29
Sheet of Paper
Burner Skin
Cleaning Brush
Heat Exchanger Fins

10.0 Changing Components
19
IMPORTANT: When changing components
ensure that both the gas and electrical
supplies to the boiler are isolated before any
work is started.
Undo the two securing screws from the rear of
the top panel. Remove the panel (Fig. 30).
Disengage the retaining magnets at the top of
the front panel and hinge forwards. Unhook the
panel from the lower hinge pins (Fig. 30).
10.1 Boiler Thermostat
1. Swivel the two retaining plates (Fig. 31)
through 90°. Lift the control box slightly and
allow it to hinge forwards. Undo the two retaining
screws and remove the cover panel (Fig. 32).
2. After noting their position remove the wires
from the thermostat body. Turn the thermostat
knob fully anticlockwise and pull it off (Fig. 33).
3. Remove the screws securing the thermostat
to the control panel and pull off the earth wire
(Fig. 34).
4. Pull the spring clip off the thermostat pocket.
Withdraw both the boiler and overheat
thermostat phials and the spacer tube from the
pocket (Fig. 33).
5. Take the new thermostat and turn the
operating shaft fully anticlockwise.
6. Reassemble in reverse order. The securing
screw incorporating the pin must be used on the
right (Fig. 34). Ensure both phials and the spacer
tube are pushed fully into the thermostat pocket
and the capillaries are retained by the clip.
Securing
Screws
Top Panel
Front Panel
Cover Panel
Spring Clip
Spacer Tube
Securing Screw
Earth Wire
Thermostat
Securing Pin Screw
Control
Knob
Thermostat
Phials
Fig. 30
Fig. 31
Fig. 33
Fig. 34
Fig. 32
Magnets

10.0 Changing Components
20
10.2 Boiler Safety Thermostat
1. Swivel the two retaining plates through 90°.
Lift the control box slightly and allow it to hinge
forwards. Undo the two retaining screws and
remove the cover panel (Figs. 35 & 37).
2. After noting their position pull the wires from
the thermostat body (Fig. 38).
3. Remove the locknut securing the thermostat
to the control panel (Fig. 38).
4. Pull the spring clip off the thermostat pocket.
Withdraw both the boiler and overheat
thermostat phials and the spacer tube from the
pocket (Fig. 36).
5. Reassemble in reverse order, ensuring both
phials and the spacer tube are pushed fully into
the thermostat pocket and the capillaries are
retained by the clip.
10.3 Gas Valve
1. Undo the disconnecting union on the gas inlet.
Remove the screw securing the burner ignition
control to the gas valve. Draw the control off the
valve (Fig. 39).
2. Undo the two nuts securing the valve, injector
manifold and burner assembly to the boiler (Fig.
40).
3. Hold the manifold and carefully draw the
assembly away from the boiler. Retain the
washer from the gas inlet connection.
4. Undo the pilot feed pipe from the gas valve,
and slacken it at the pilot burner to allow it to
swing clear.
5. Undo the four screws securing the gas valve
to the injector manifold. Remove the valve and
seal (Fig. 41).
6. Check the condition of the seal previously
removed before fitting the new valve to the
injector manifold. Replace as necessary.
7. Reassemble in reverse order and check the
condition of the seal to be used on the
disconnecting union. Replace as necessary.
Securing Nuts
Manifold
Fig. 37
Fig. 40
Fig. 41
Gas Valve
Quad Seal
Burner Manifold
Valve Securing
Screws
Burner Ignition
Control
Securing Screw
Gas Valve
Disconnecting Union
Sealing Washer
Gas Cock
Fig. 39
Spring Clip
Thermostat
Phials
Spacer Tube
Fig. 36
Fig. 35
Lock Nut
Safety Thermostat
Fig. 38