FireBird Enviromax Popular C20 User manual

Working towards a greener planet
TECHNICAL MANUAL INCLUDES
❯❯ HOUSEHOLDER INSTRUCTIONS
❯❯ INSTALLER GUIDE
❯❯ COMMISSIONING
❯❯ SERVICING
❯❯ SPARE PARTS
ENVIROMAX
CONDENSING RANGE
This manual must remain with the householder on completion of installation
TECHNICAL MANUAL
For use with Kerosene 28 Sec. Oil

Firebird Enviromax Condensing Range
1
CONTENTS
PAGE
Foreword / Introduction 2
1. TERMS & CONDITIONS OF GUARANTEE 3
2. HOUSEHOLDER INSTRUCTIONS
Popular / Boilerhouse ........................................................................................................................... 4
Kitchen ................................................................................................................................................................. 4
Utility ...................................................................................................................................................................... 4
System ................................................................................................................................................................... 4
Heatpac ............................................................................................................................................................... 5
Burner Lockout............................................................................................................................................... 5
Combi .................................................................................................................................................................. 6
3. BOILER TECHNICAL DETAILS
3.1 POPULAR
Boiler Technical Specifications ..................................................................................................... 10
Wiring ................................................................................................................................................................... 11
Spare Parts ....................................................................................................................................................... 12
Baffles ................................................................................................................................................................... 13
3.2 KITCHEN
Boiler Technical Specifications ..................................................................................................... 14
Wiring .................................................................................................................................................................... 15
Spare Parts ....................................................................................................................................................... 17
3.3 COMBI
Boiler Technical Specifications ...................................................................................................... 18
Wiring ................................................................................................................................................................... 19
Domestic Heating & Hot Water ............................................................................................... 21
Spare Parts ....................................................................................................................................................... 25
3.4 SYSTEM
Boiler Technical Specifications ...................................................................................................... 28
Wiring ................................................................................................................................................................... 29
Spare Parts ...................................................................................................................................................... 30
3.5 HEATPAC
Boiler Technical Specifications ..................................................................................................... 32
Wiring .................................................................................................................................................................. 34
Spare Parts ...................................................................................................................................................... 35
3.6 BAFFLES
Baffles Spare Parts Guide ................................................................................................................. 37
4. STANDARDS & REGULATIONS ..................................................................................... 38
5. SAFETY....................................................................................................................................................................... 39
6. INSTALLATION
6.1 Installation Guidelines ........................................................................................................................... 40
6.2 Positioning the Boilers ......................................................................................................................... 41
6.3 Condensate Disposal.............................................................................................................................. 42
6.4 Flue Regulations............................................................................................................................................ 44
6.5 Flue Systems ................................................................................................................................................... 48
6.6 Oil Supply............................................................................................................................................................ 53
7. BURNER
Burner Settings ........................................................................................................................................... 55
Burner Specifications ............................................................................................................................ 56
Fault finding Burner ............................................................................................................................... 57
Spare Parts - Burner ............................................................................................................................. 58
8. SERVICING ............................................................................................................................................. 60
Service Record ............................................................................................................................................ 61
9. COMMISSIONING ..................................................................................................................... 62
Commissioning Record ...................................................................................................................... 64
GUARANTEE CARD ............................................................................................................................ 65

Firebird Enviromax Condensing Range
2
FOREWORD
We would like to thank you for purchasing a high
efficiency Firebird C Range Condensing domestic
central heating oil fired boiler. This instruction
manual is produced for the reference and
guidance of qualified installation engineers such as
those who are OFTEC registered. EU legislation
governs the manufacture, operation and
efficiency of all domestic central heating oil
boilers. Our boilers and burners will are supplied
as matched units tested and approved to OFTEC
Standard OFS Al00.
FIREBIRD Boilers are full manufacturing members
of OFTEC (Oil Firing Technical Association) and
are participating in its Boiler testing and approvals
programme to comply with OFS A100 and EC
Efficiency Directive.
You should ensure that all installation, servicing
and commissioning works are carried out by a
competent person, such as one registered by
OFTEC. It should be noted that it is the
responsibility of the Installer/Householder to
ensure that the boiler is properly
commissioned. Failure to do so may invalidate
the boiler guarantee and any extended
warranty.
SERVICING
The boiler requires servicing on an annual basis
to ensure it maintains its efficiency, continues
to perform reliably and as a regular check on
its built-in safety features. It is important that
servicing should be conducted by a competent
engineer, such as one who is OFTEC trained
and registered.
All appropriate OFTEC manuals and BS
Standards should be studied and their
requirements adhered to and used in
conjunction with these instructions. This
manual includes a list of some BS Standards
and Building Regulations.
OFTEC is conducting training and registration of
engineers and this is to be commended, as
reading of this manual alone for installation and
servicing procedures cannot replace the critical
advantage provided by training and years of
experience.
INTRODUCTION
Firebird domestic oil fired condensing boilers are
highly efficient and are all independently certified
to Sedbuk Band A. They use less fuel and have
lower running costs than non-condensing boilers.
Because of their increased efficiency they emit
less carbon dioxide than non-condensing boilers,
which will contribute to efforts to reduce global
warming. The incredible efficiency of the Firebird
C Range Condensing Boiler is due to the
development of a single boiler unit with three
unique heat exchanger units. This gives a
exchange surface greater than non-condensing
boilers.
This additional surface area increases the amount
of heat extracted from the combustion process
and thus reduces the heat wasted to atmosphere.
So much heat is extracted from the combustion
gases that their water vapour element condenses
into liquid form, releasing the latent heat that was
used to create the vapour in the first place. It is
this heat gain that gives the condensing boiler its
significant advantage over a non-condensing
model. In order to enable this high level of heat
extraction to take place, the water in the boiler’s
heat exchanger must be cooled down to about
55˚C or less, this means that the boiler is
working at its maximum efficiency.
The condensate produced is often mistakenly
considered to be highly acidic. In fact the acidity of
condensate from a Firebird C Range Condensing
Boiler will be found to be as low, if not lower, than
that of vinegar.
A 20˚C. differential between flow and return
should be maintained to achieve maximum
performance from the Firebird C Range
Condensing Boiler.
The Firebird C Range Condensing Boiler is
suitable for underfloor heating provided the
return temperature is above 40˚C. at all times.
The Firebird C Range Condensing Boiler even
when not working in condensing mode will still
operate at extremely high efficiencies making it
suitable for fitting to an existing heating system
without alteration to the radiator sizes.
The burner is factory set for use with
kerosene 28 second class C fuel.

Firebird Enviromax Condensing Range
3
TERMS & CONDITIONS OF GUARANTEE
• Firebird boilers are designed and manufactured to give many years of trouble-free
service.We provide a comprehensive conditional warranty of 5 years on the boiler
shell and 2 years on burner and associated controls.
• This will only apply if the boiler is commissioned by a Firebird approved engineer
and is serviced annually thereafter.
• Please ensure that the Commissioning Card (the tear-off section on the Guarantee
Card) is returned, fully completed within 28 day’s of complete installation &
commissioning. Correct commissioning will ensure that your boiler is set to
operate at its maximum fuel efficiency.
• Consumable components,the nozzles and the oil hose are excluded.
• The terms laid down on the Guarantee must be adhered to.
1. Firebird hereby guarantees the following
(The Guarantees)
a. The Boiler Shell will be free from defective parts or
workmanship for a period of 5 years from the date of
installation.
b. Burner, controls and flue kits (supplied by Firebird)
will be free from defective parts or workmanship for
a period of 2 years from the date of installation.
(With the exception of burner nozzles, which should
be replaced at the recommended service intervals.)
2. Guarantees are subject to the following conditions:
a. All claims under the guarantees must be within the
above stated time limits.
b. The boiler must be commissioned by qualified
persons and as set out in the Installation Manual,
using correct test equipment.
c. Maintenance should be carried out at the intervals
stated in the Installation Manual.
d. Installation of the boiler must be in accordance with
(a) Installation Manual, (b) all relevant standards and
codes of practice.
e. Firebird can accept no liability in respect of any
defect arising from incorrect installation, negligence,
fair wear and tear, misuse, alteration or repair by
unqualified persons.
f. Firebird will not accept any liability in respect of any
defect occurring in the heat exchanger due to
limescale build-up and or low return water
temperature.
g. The guarantees extend to reasonable labour costs
EXCEPT under clause 1a where any valid claim made
after 3 years will not include labour costs.
h. Firebird’s prior authorisation must be obtained before
examination or repair of the boiler takes place.
i. Firebird will examine all claims made under the
guarantee sand for any claims that are deemed
invalid, the costs incurred will be borne by the
owner.
j. That the appliance was used only for normal
domestic central heating purposes.
3. Any defective part removed under any or all of the
guarantees MUST be returned to Firebird.
STATUTORY RIGHTS OF THE OWNER ARE NOT AFFECTED BY THIS GUARANTEE
1
TERMS OFTHIS GUARANTEE

Firebird Enviromax Condensing Range
2
4
HOUSEHOLDER
Mains Supply Light *
BurnerLock Out Light *
Burner
Plug
Temperature
Control
BURNER
Lock-out
re-set button
High Limit
re-set button
Enviromax Kitchen,
System and Utility
Operating Procedure
(All outputs)
TO STARTTHE BOILER FOLLOWTHIS SEQUENCE:
Turn on fuel supply.
Switch on power supply to boiler.
Turn timer control (If Fitted) to ‘ON’.
Set the boiler thermostat to the required
temperature (figure 1 pg. 5). The boiler thermostat
controls the boiler operation by automatically
maintaining the required boiler water temperature
output. Safe operation is also maintained by the
burner control system which provides the required
ignition and shut off sequence. If the optional timer
control is fitted this will automatically switch the
boiler off and on when heat is required.
THE BOILER CAN BETURNED OFF BY
ANY OFTHE FOLLOWING MEANS:
 Turn the timer control (if fitted) to OFF.
 Turn OFF the mains electrical supply tothe boiler.
* Lights not included in Utility models.
POPULAR BOILERHOUSE KITCHEN/SYSTEM/UTILITY
Enviromax Popular Boilerhouse
Operating Procedure
(All outputs)
TO STARTTHE BOILER FOLLOWTHIS SEQUENCE:
Turn on fuel supply.
Switch on power supply to boiler.
Turn timer control (If Fitted) to ‘ON’.
Set the boiler thermostat to the required
temperature (figure 1 pg. 5). The boiler thermostat
controls the boiler operation by automatically
maintaining the required boiler water temperature
output. Safe operation is also maintained by the
burner control system which provides the required
ignition and shut off sequence. If the optional timer
control is fitted this will automatically switch the
boiler off and on when heat is required.
THE BOILER CAN BETURNED OFF BY
ANY OFTHE FOLLOWING MEANS:
 Turn the timer control (if fitted) to OFF.
 Turn OFF the mains electrical supply tothe boiler.

figure 1
Set at Max 80˚C Set at Mid 70˚C Set at Min 60˚C
Firebird Enviromax Condensing Range
2
5
HOUSEHOLDER
(ALL MODELS)
The boiler is factory fitted with a burner control box
lockout safety feature which operates automatically if a
fault occurs in the burners operation. Should this occur,
the light on the front of the burner - See Burner Section
Pg.56 or Boiler Photo - will illuminate and its cause must
be investigated.This could be caused by:
A. An interruption in the fuel supply.
(Eg.empty oil supply tank)
B. An electrical supply fault.
C. A fault with the burner or its safety control system.
D. The failure of a component. (Eg.photo cell)
E. Worn or dirty oil nozzle.
Before attempting to restart the boiler the front panel and
the burner cover should be removed and a visual check
made for any obvious problems such as oil leaks, loose
connections etc.
ENSURE OILTANK CONTAINS CORRECT GRADE FUEL.
CLASS C2 KEROSENE
TO RESTARTTHE BOILER
1. Press reset button See Burner Section Pg. 56 or
Boiler Photo
2. Ensure that the boiler thermostat, time switch
(if fitted) and any external controls connected to the
boiler are set to call for heat.
3. Check that the oil supply valves are open and that
there is sufficient oil in the tank.
4. Check that the burner lockout light is unlit and with
the‘mains ON’the boiler will be ready to commence
its start sequence.
HEATPAC/SYSTEMPAC/SLIMLINE
Temperature Control
BURNER
Lock-out
re-set button
High Limit re-set button
Burner
Plug
Enviromax Heatpac,Systempac
and Slimline Heatpac
Operating Procedure
(All outputs)
TO STARTTHE BOILER FOLLOWTHIS SEQUENCE:
Turn on fuel supply.
Switch on power supply to boiler.
Turn timer control (If Fitted) to ‘ON’.
Set the boiler thermostat to the required
temperature (figure 1 pg. 5). The boiler thermostat
controls the boiler operation by automatically
maintaining the required boiler water temperature
output. Safe operation is also maintained by the
burner control system which provides the required
ignition and shut off sequence. If the optional timer
control is fitted this will automatically switch the
boiler off and on when heat is required.
THE BOILER CAN BETURNED OFF BY
ANY OFTHE FOLLOWING MEANS:
 Turn the timer control (if fitted) to OFF.
 Turn OFF the mains electrical supply tothe boiler.
Burner Lockout
Thermostat Control

Firebird Enviromax Condensing Range
2
6
HOUSEHOLDER
DHW ON. On Indicator light. CH. On Indicator light.
Burner Lock Out Indicator light.
High Limit Thermostat Indicator light.
MAX. = 80˚C. MIN. = 60˚C. Knock Out For Firebird Twin Timer Kit.
SYSTEM PRESSURE GAUGE.
SYSTEM PRESSURE.
C˚
MIN.
MAX.
MID.
Lock
Out
Limit
Stat.
Out to drain.
Out to drain.
Inlet connecting condense pump inlet
to condense drain at base of boiler.
Condense Pump.
Inlet
23
0
4
(WhenFitted)
OperationLights
Pressure Gauge
Temperature
Control
Twin Timer Positions
(OptionalExtra)
CONDENSE PUMP
(WHENFITTED)
COMBI C OPERATING PROCEDURE
TO STARTTHE BOILER FOLLOWTHIS SEQUENCE:
Turn on fuel supply.
Switch onpower supply to boiler.
Set the boiler thermostat to the required
temperature.( For Central Heating
Max.80˚C,Min.60˚C )
Set timers - Domestic Hot Water & Central Heating.
The central heating thermostat controls the
boiler when in central heating mode only,
thus maintaining the required boiler water
temperature output for central heating.
Domestic hot water temperature is
controlled by separate non adjustable
thermostat,plus thermostatic mixing valve.
See Page 7.
Safe operation is also maintained by the burner
control system which provides the required ignition
and shut off sequence.
If the optional timer controls are fitted these will
automatically switch the boiler off and on,as and
when Cental Heating or Domestic HotWater is
required.
THE BOILER CAN BETURNED OFF BY ANY OFTHE
FOLLOWING MEANS:
Turn both timer switches to OFF.(WHEN FITTED)
Turn OFF the mains electrical supply to the boiler.
WHEN SERVICING ALWAYS SWITCH OFF THE MAINS
SUPPLYTOTHE BOILER
COMBI MODEL
Enviromax CombiWhite Cased
and Combipac Operating
Procedure
(All models)
THERMOSTAT CONTROL

13
14
11
10
16
15
14
13
12
9
5
8
7
6
6
8
9
7
5
3
4
24
22
1
18
19
20
20
17
18
16
17
15
19
10
11
12
22
22
21
4
3
22
21
24
1
23
23
FIREBIRD TWIN TIMER KIT.
Central Heating Timer.
Power on
'Fixed'.
Manual Switch.
Power on
to timer.
Power
off.
13
14
11
10
16
15
14
13
12
9
5
8
7
6
6
8
9
7
5
3
4
24
22
1
18
19
20
20
17
18
16
17
15
19
10
11
12
22
22
21
4
3
22
21
24
1
23
23
Domestic Hot Water Timer.
OPTIONALTWINTIMERS KIT
Firebird Enviromax Condensing Range
2
7
HOUSEHOLDER
Timer Switch
Pos. A
Constant
Timer Switch
Pos. B
Timed
Timer Switch
Pos. C
Off
PROGRAMMING GUIDE
SETTING UP
The outer dial should be set to
the current time. Rotate the dial
slowly in clockwise direction,
until the correct hour is aligned
with the arrow head printed on
the dial. Note that the outer dial
isprintedwiththe24 hourclock -
8:00 a.m.= 8 on the dial.
8:00 p.m.= 20 on the dial.
Do not attempt to rotate the dial
in an anti-clockwise direction.
Central Heating Control
Thecontrolpanelisdesignedforsimplicityofuseandis
equipped with adjustable thermostat dial, optional
time controls and limit thermostat reset button as
shown above. It also has a built in system pressure
gauge which is connected to the boiler and heating
system water at the safety valve.
When replacing make sure that each thermostat
pocketreceivescorrectphial bymarkingand noting
carefully each phial and its correct pocket.

MANUAL SWITCH
Manual switch operation: The manual switch will
provide Fixed On / Fixed Off / Auto control, thereby
allowing manual control of the switched output
without disrupting the timed (tappet) settings. Please
refer to the illustration above.
The slide switch can be set in one of the three positions
available‘on’and‘off’are fixed selections - the timer will
remain in the on or off condition until you next use the
manualswitchtochangethesetting.‘auto’isthenormal
positionfortheswitch,allowing controltobegoverned
by the tappet settings - in accordance with
‘programming switching times’above
PROGRAMMING SWITCHINGTIMES
Set all tappets between the on and off times required,
to the outer edge of the dial (see figure 1).E.g.to set on
at 8:00 a.m.- Off at 1:00 p.m.push tappets between dial
numbers 8 and 13 to outer edge of dial.Set any other
required switching times in a similar manner.

Firebird Enviromax Condensing Range
2
8
HOUSEHOLDER
DOMESTIC HOTWATER
PRODUCTION
Domestic hot water production cycle commences once
the timer has been set and switched on. If boiler and
system are cold allow 20 - 30 minutes for domestic hot
waterheat store toreach working temperature. Central
heating is controlled by setting the time switch - also
located on this panel.The boiler control system always
gives priority to domestic hot water production by
automatically overriding the central heating mode as
necessary.The interruption to central heating lasts only
as long as the demand for hot water continues.This has
no significant effect on the heating circuit. Once hot
water demand has ceased the boiler will automatically
return to central heating mode if there is a demand.
When hot water only is required turn central heating
timer switch to‘off’.
If alternative programmer is used then refer to separate
programmer instructions.
BY REQUEST COMBI C BOILERS ARE AVAILABLE
WITH BUILT-INTIMERS.
DOMESTIC HOTWATER
OPERATION
Hot water is available on demand by turning on a hot
tap. This activates the sensor which powers the
domestic hot water pump ensuring that all boiler hot
waterisdivertedtothedomesticheat exchangerwhich
heats the incoming mains water to give instant mains
pressure hot water.
Hot water is then mixed with mains cold water by a
thermostatic mixing valve set to ensure that it does not
exceed 65°C. This is shown in accompanying
photograph below.
Theburnermaycontinuetorunafterhotwaterdrawoff
has ceased - to ensure the pre-set temperature is
restored in the heat store. This may also occur at any
time if the control system senses that there is a need to
replenish the heat store, i.e. if there has been natural
temperature drop in heat store during long periods of
low demand for domestic hot water.

INTRODUCTIONTO COMBI
OPERATIONS
FIREBIRD COMBI C
The Firebird Combi C is designed to give separate
control to both the domestic hot water and to the
central heating. The Combi C has three thermistors
connected to a PCB board that gives very accurate and
fast temperature control and one high limit
thermostats that help to achieve this.
Tank thermistor
The Tank Thermistor controls the temperature of the
heat store (or Slave Tank). The Tank Thermistor
sensor is located in stat pocket in the top of the tank at
the side of the boiler. When the thermistor senses that
the heat store is seeking heat it activates a relay on the
PCB. board in the control panel this in turn sends
power to the domestic circulating pump and burner.
The Flow sensor is the only other device that will
activates the relay in this way when it detects the flow
of water on opening a tap. This heat store is a tank
with a bank of water stored at a higher temperature
than that normally used on a central heating circuit,
and is used for domestic hot water production. The
temperature of this heat store has priority over central
heating. Central heating will not work until the heat
store reaches a temperature of 78˚C. + -3˚C
The Boiler Control thermistor
The boiler Control thermistor has a number of
functions.
1. It controlling the temperature of the water in the
boiler when in central heating mode (60˚C to 80˚C).
When the central heating is on it does not effect the
temperature in the heat store. The check valve on the
domestic flow circuit prevents any circulation to or
from the heat store. The sensor from this thermistor is
situated in stat pocket in the boiler.
2. The over heat function activates the domestic
circulating pump when due to residual heat rise in the
boiler, the temperature reaches 93˚C. The water is
circulated from the boiler into the heat store tank thus
preventing the boiler from activating the high limit
thermistor.
3. The early alert function controls the burner when
the Combi is operating in domestic hot water mode. If
the temperature in the boiler reaches 87˚C before the
tank thermostat cuts out, the early alert thermistor
cuts off the burner.
Firebird Enviromax Condensing Range
2
9
HOUSEHOLDER
The High Limit Thermostat
The High limit thermostat cuts off power supply to the
burner should all thermostats fail. It is a manual re-set
thermostat, and will stay off until such time that it is re
set. If this thermostat is activated, the reason for
activating must be resolved before re setting. The sen-
sor from this thermostat is situated in stat pocket in
the boiler in the same Thermostat pocket as the boil-
er control thermistor. The re-set button is located at
the back of the control panel directly behind the
location for the optional DWH timer. See Control
Panel Diagram - on page 26.
Flow Switch thermistor
The flow switch thermistor is coloured red and is
positioned in a pocket on the cold feed pipe to the
plate heat exchanger. When the thermistor senses
detects the flow of water on opening a tap it activates
a relay on the PCB. board, this in turn sends power to
the domestic circulating pump and burner.
Important
Keep thermistor sensor wires separate from mains
power cables. i.e.: Mains feed cable to combi and
circulating pump cables.

Firebird Enviromax Condensing Range
3
10
3.1 - POPULAR BOILERHOUSE -TECHNICAL DETAILS
Firebird Enviromax Popular Boilerhouse C Range Dimensions (mm)
Model Output Weight kg Dimensions(mm)
Kw/hr(incl. Burner) H W D B C E F G
PopularC20 110 684 441 381 202 220 163 99 122 502
PopularC26 112 684 441 381 202 220 163 99 122 502
PopularC35 115 684 441 381 202 220 163 99 122 502
PopularC44 182 820 470 533 202 154 154 97 123 620
PopularC58 190 820 470 533 253 154 154 97 123 620
PopularC73 210 877 530 527 253 265 155 97 123 670
BURNER
DEPTH
Front View Side View Top View
C
ED
W
GH
F
BB
Boiler Model C20/26 C35 C44/58 C73
Max Heat Output Kw 20/26 35 44 / 58 73
Btu/h (‘000) 68/89 119 150 / 198 249
CONNECTIONS
Heating Flow 1”Bsp. 1”Bsp. 11/2”Bsp 11/2”Bsp.
Heating Return 1”Bsp. 1”Bsp. 11/2”Bsp. 11/2”Bsp.
Drain Off Cock 1/2”Bsp.1/2”Bsp.1/2”Bsp.1/2”Bsp.
Condense Drain Off Connection. 22 mm PLASTIC 22 mm PLASTIC 22 mm PLASTIC 22 mm PLASTIC
WATER CONTENT
Water Content Boiler 24 24 43.5 54
FLUE (Indoor Boilers) Concentric Flue
Balanced Flue Assembly (mm) 125 (5”) 125 (5”) 155 (6”) 170 (7”)
Conventional flue Socket. (mm) 130 id. 130 id. 155 id. 170 id.
Flue Draught Reqd.(Min WG.) 0.040” 0.040” 0.040” 0.040”
Conventional Flue (MaxWG.) 0.15” 0.15” 0.15” 0.15”
MAINSWATER SUPPLY Limescale excess:When over 150/200 ppm.Fit appropriate scale reducer.
Pressure Max 10 bar max (Fit pressure reducing valve as necessary)
Min 1 bar min. For user Comfort reduce pressure at tap to between 1 and 5 Bar.
TEMPERATURE CONTROL
Boiler Central Heating Control 60˚C - 80˚C +- 3˚C Boiler Safety Limit 110˚C +- 3˚C
HEATING SYSTEM (SEALED) Fit in accordance with BS 7074 Part 1,BS 5449,OFTEC Standards,etc
BoilerTest Pressure 4.5 Bar SafetyValve Operating Pressure Gauge 0 to 4 Bar
WATER SIDE RESISTANCE
Flow RateTo Give A Nominal Output At 10k Differential Flow RateTo Give A Nominal Output At 20k Differential
Flow Rate Measured (Kg h-1)2874.24 Flow Rate Measured(Kg h-1)1522.92
Waterside Resistance (mbar) 0.18 Waterside Resistance (mbar) 0.19
Pressure Jet Oil Burners RIELLO RDB 2.2 up to C35 & RIELLO RDB 4.2 up to C58 - C73
Fuel C2 Kerosene
Electrical Supply 230v.AC 50HzTo be fused at 5amp.
Copper Pipe Not Plastic to be used for a minimum of 1 metre off the boiler

Firebird Enviromax Condensing Range
33.1 - POPULAR BOILERHOUSE -WIRING
ELECTRICAL SUPPLY
The boiler and controls require 230V 1 phase 50Hz mains electric supply protected with a 5amp fuse.
The guarantee on this product will be rendered void if damaged by power from a stand by electricity supply.i.e.(Generator.)
THIS APPLIANCE MUST BE EARTHED.
A qualified electrician must carry out all electric wiring in accordance with current I.E.E Regulations and any local
regulations which may apply.
The mains electrical supply must be taken from a double pole isolating switch with a 5amp fuse,positioned somewhere
close to the boiler.Heat resisting cable must be used which can be routed into the boiler through the access provided on
either side of the base.Ancillary controls may be provided for with terminal connections in the control panel.
Burner Plug.
NE
Burner Plug.
Safety Limit
Thermostat.
Reset Pin Inside
Screw Off Cover.
Temperature
ControllDial.
MAX.
MIN.
X = Burner Lock out.
N = Neutral.
L= Live
= Earth
Normally Open Contacts
Close On Rising Temp
TIME-SWITCH
FROSTTHERMOSTAT
MAINS IN
OVER RUN DIAGRAM FOR CIRCULATING PUMP.
NormallyClosed
Contacts Open
OnRising Temp.
Clamp on pipe stat Set at 87˚C.
N.
TWO POLL SWITCH
(SERVICE SWITCH)
PUMP
HEATING
UNIT
N.
LNX L
NX
Control Thermostat.
Safety Limit
Thermostat.
EE
Use Double Insulated
Heat ResistantCable.
Power supply
to Burner.
Whenconnectingthe mains
supplytothis unitensurethat:
1Double insulated heat resistantcableis
used.
2No single insulated cable is exposed at
connection points onthe(Therrmostat,
Burner,plug and socket)
3All relevant lids and covers are properly
replaced andsecuredcorrectly.
4A permanent power supply (not timed)
beavailableatlocation of boiler.
This can be used for a frost thermostat
andor an overheatthermostat,should
eitheror both beneeded.
TORESET: Waitfor temperature to drop,unscrewcapthendepressredpin.
Safety Limit
Thermostat. Live Out To
Burner/ Boiler.
Control
Thermostat.
= Earth
Burner Lock out.
Neutral.
Burner Lock out.
Switch Live
Neutral.
= Earth
SCHEMATIC DIAGRAM. IMPORTANT
I.Stat Dual Thermostat
= Earth
L =Live
N = Neutral.
X = Burner Lock out.
POPULAR / BOILERHOUSE WIRING
Common.
CONTROL STAT. &LIMITSTAT.
NotRequiredin
Boilerhouseor
HeatpacModels
11

Firebird Enviromax Condensing Range
3
12
3.1 - POPULAR BOILERHOUSE - PARTS
ENVIROMAX POPULAR - Boilerhouse Models C20, C26,C35, C44, C58 & C73
No. DescriptionC20 / C26 / C35 C44 / C58 C73
1 Burner panel 211545 211648 211437
2 Right Side Panel 211542 211647 211434
3 Left Side Panel 211543 211649 211435
4 Back Panel 211544 211650 211436
5 Jacket 110917 111653 111438
6 Shell 310921 311634 311481
7 Burner C20 - 410205 C44 - 410208 410210
C26 - 410206 C58 - 410209
C35 - 410208
8 Imit Stat 410204 410204 410204
9 Connector 111537 111537 111537
10 Condense Trap 110935 110935 110935
11 Condense Float 110924 110924 110924
12 Condense Drain Baffle 210904 211643 211500
13 22mm Teflon Seal 110967 110967 110967
910
11
12
3
4
5
6
2
1
10
Condense float.
22mm Teflonseal.
Condense Trap.
Condense Waste
Straight Connector
10
11
13
9

Firebird Enviromax Condensing Range
3
13
3.1 - POPULAR BOILERHOUSE BAFFLES
• • • • PATENTED BOILER DESIGN • • • •
ENVIROMAX (E) RANGE BAFFLES.
Tube Baffle (4 Off ) E20,E26 & E35 - Part No.110907
E26 & E35 Door. - Part No.210910
E26 & E35 Door Gasket. - Part No.110918
Tube Baffle (1 Off ) E20,E26 & E35 Part No.110908
Tube Baffle (4 Off ) E20,E26 & E35 - Part No. 110909
E20 Smoke Baffle R3.5 ........... - Part No. 212022
E26 Smoke Baffle R4 ............... - Part No. 212028
E35 Smoke Baffle oblong ......- Part No. 212122
ENVIROMAX C20,C26 & C35 ENVIROMAX C44,C58 & C73

Firebird Enviromax Condensing Range
3
14
3.2 - KITCHEN
Boiler Model C20/26 C35 C44/58 C73
Max Heat Output Kw 20/26 35 44 / 58 73
Btu/h (‘000) 68/89 119 150 / 198 249
CONNECTIONS
Heating Flow 1”Bsp. 1”Bsp. 11/2”Bsp 11/2”Bsp.
Heating Return 1”Bsp. 1”Bsp. 11/2”Bsp. 11/2”Bsp.
Drain Off Cock 1/2”Bsp.1/2”Bsp.1/2”Bsp.1/2”Bsp.
Condense Drain Off Connection. 22 mm PLASTIC 22 mm PLASTIC 22 mm PLASTIC 22 mm PLASTIC
WATER CONTENT
Water Content Boiler 24 24 43.5 54
FLUE (Indoor Boilers) Concentric Flue
Balanced Flue Assembly (mm) 125 (5”) 125 (5”) 155 (6”) 170 (7”)
Conventional flue Socket. (mm) 130 id. 130 id. 155 id. 170 id.
Flue Draught Reqd.(Min WG.) 0.040” 0.040” 0.040” 0.040”
Conventional Flue (MaxWG.) 0.15” 0.15” 0.15” 0.15”
MAINSWATER SUPPLY Limescale excess:When over 150/200 ppm.Fit appropriate scale reducer.
Pressure Max 10 bar max (Fit pressure reducing valve as necessary)
Min 1 bar min. For user Comfort reduce pressure at tap to between 1 and 5 Bar.
TEMPERATURE CONTROL
Boiler Central Heating Control 60˚C - 80˚C +- 3˚C Boiler Safety Limit 110˚C +- 3˚C
HEATING SYSTEM (SEALED) Fit in accordance with BS 7074 Part 1,BS 5449,OFTEC Standards,etc
BoilerTest Pressure 4.5 Bar SafetyValve Operating Pressure Gauge 0 to 4 Bar
WATER SIDE RESISTANCE
Flow RateTo Give A Nominal Output At 10k Differential Flow RateTo Give A Nominal Output At 20k Differential
Flow Rate Measured (Kg h-1)2874.24 Flow Rate Measured(Kg h-1)1522.92
Waterside Resistance (mbar) 0.18 Waterside Resistance (mbar) 0.19
Pressure Jet Oil Burners RIELLO RDB 2.2 up to C35 & RIELLO RDB 4.2 up to C58 - C73
Fuel C2 Kerosene
Electrical Supply 230v.AC 50HzTo be fused at 5amp.
Firebird Enviromax Kitchen C Model Dimensions (mm)
Front View Side View RearView Top View
H
WD
E
G
A
F
C
B
Copper Pipe Not Plastic to be used for a minimum of 1 metre off the boiler
Model Output Weight Dimensions(mm)
Enviromax Kw/hrkg H W D A B C E F G
Utility C20 123 845 442 610 755 221 157 94 124 502
KitchenC20 125 845 442 610 755 221 157 94 124 502
KitchenC26 128 845 442 610 755 221 157 94 124 502
KitchenC35 131 845 442 610 755 221 157 94 124 502
KitchenC44 210 1046 464 852 914 232 154 100 125 620
KitchenC58 216 1046 464 852 914 232 154 100 125 620
KitchenC73 242 1196 524 852 1024 262 157 100 125 670

Firebird Enviromax Condensing Range
3
15
3.2 - KITCHEN -WIRING
Temperature
Control.
Max80˚C. Min 60˚C.
Pump Over run
Thermostat. 87˚C.
Power To
Burner
Use Heat Resistant Cable. Protect Supply with 5 Amp. Fuse.
Pump
Connection.
Mains
Connection.
(B4) NEUTRAL
(S3) EARTH. TIMED
SWITCH LIVE (T2)
PERMANENT
LIVE (T1)
B4 T1
T2
S3 NL1
NEUTRAL (N)
EARTH.
PUMP LIVE (L1)
B4 N
T1
T2
S3 L1
B4
NT1 T2 B3
L1
Utility Wiring
Power To
Burner
Firebird
Dual Thermostat
Reset Pin Inside
Screw Off Cover.
Temperature
Control Dial.
High Limit
Thermostat.
Control
Thermostat.
MIN. MAX.
L2 L1
N
C21
Enviromax 7 Pin Plug Wiring White Panel with Lights, Condense Pump.
Firebird Enviromax Utility Wiring Diagram
Control Thermostat.
Safety Limit Thermostat.
E
E
X
N
LXNL
Control Thermostat.
Safety Limit Thermostat.
E
E
X
N
LX
NL
B4
L2 L1
N
MIN. MAX. MIN. MAX.
ELECTRICAL SUPPLY
The boiler and controls require 230V 1 phase 50Hz mains electric supply protected with a 5amp fuse.
The guarantee on this product will be rendered void if damaged by power from a stand by electricity supply.i.e.(Generator.)
A qualified electrician must carry out all electric wiring in accordance with current I.E.E Regulations and any local regulations
which may apply.
The mains electrical supply must be taken from a double pole isolating switch with a 5amp fuse,positioned somewhere close
to the boiler.Heat resisting cable must be used which can be routed into the boiler through the access provided on either
side of the base.Ancillary controls may be provided for with terminal connections in the control panel.

Firebird Enviromax Condensing Range
3
16
3.2 - KITCHEN -WIRING
Temperature
Control.
Max80˚C.
Min 60˚C.
Pump Over run
Thermostat. 87˚C.
Power To
Burner
Use Heat Resistant Cable.
Protect Supply with 5 Amp. Fuse.
Pump
Connection.
Mains
Connection.
(B4) NEUTRAL
(S3) EARTH. TIMED
SWITCH LIVE (T2)
PERMANENT
LIVE (T1)
B4 T1
T2
S3 NL1
NEUTRAL (N)
EARTH.
PUMP LIVE (L1)
B4 N
T1
T2
S3 L1
B4
NT1 T2 B3
L1
Firebird
Dual Thermostat
Reset Pin Inside
Screw Off Cover.
Temperature
Control Dial.
High Limit
Thermostat.
Control
Thermostat.
MIN. MAX.
L2 L1
N
C21
Enviromax 7 Pin Plug Wiring White Panel with Lights, Condense Pump.
Firebird Enviromax Kitchen Wiring Diagram
Control Thermostat.
Safety Limit Thermostat.
E
E
X
N
LX
NL
MIN. MAX.
MIN. MAX.
C.P.
Condense
Pump Wiring.
(When Fitted)
C.P.
Burner Plug.
Pressure Gauge.
Burner Lock Out Light.
7 Pin Plug.
Power Supply & Pump.
High limit
re-set button.
Not in Use.
Mains Supply Light.

Firebird Enviromax Condensing Range
3
17
3.2 - KITCHEN - PARTS
ENVIROMAX KITCHEN - White Cased Models C20, C26, C35, C44, C58 & C73
No. DescriptionC20/26/35 C44/58 C73
1 Front Panel 111376 111762 111581
2 Front Panel Insulation 110937 111763 111593
3 Left Side Panel 111377 111761 111580
4 Right Side Panel 111377 111766 111583
5 Top Panel 111375 111764 111582
6 Top Panel Insulation 111794 111765 111592
7 Flue Trim (Half Moon) 111397 111587 111802
8 Flue Blank 111388 111586 111803
9 Flue Gas Analysis Blank 110923 110923 110923
10 Control Panel 311671 311706 311707
11 Back Support 111596 111767 111585
12 Insulation Jacket 110917 111653 111438
13 Boiler Shell 310921 311634 311481
14 Left Support Bracket 210915 211805 211806
15 Right Support Bracket 210915 211805 211806
16 Back Support Bracket 210916 211770 211591
17 Burner C20 410205 C44 410208 410210
C26 410206 C58 410209
C35 410208
18 Air Hose 111902 111902 110501
17
18
13
12
3
4
5
6
7
8
910
21
11
14
16 15

Firebird Enviromax Condensing Range
Boiler Model C20/26 C35
Max Heat Output Kw 20/26 35
Btu/h (‘000) 68/89 119
CONNECTIONS
Heating Flow 22 mm 28 mm
Heating Return 22 mm 28 mm
Mains Cold Feed (Copper) 15 mm 15 mm
HotWater Delivery (Copper) 15 mm 15 mm
Drain Off Cock 1/2”Bsp.1/2”Bsp.
Safety Pressure Relief valve outlet (Copper) 15 mm 15 mm
Condense Drain Off Connection. 3/4”Bsp.Female 3/4”Bsp.Female
Circulating Pump (Grundfos) 25/60 25/60
Domestic Hot Water Plate Heat Exchanger 25plate 31plate
Boiler integral Expansion 12 litres 12 litres
Vessel Normal Capacity pre-charged to 1 bar. pre-charged to 1 bar.
WATER CONTENT
Water Content Boiler 24 24
Water Content Primary Tank (Litres) 40 40
D.H.W. GUIDE PERFORMANCE
120 litre at 40˚C Δt.Litres per minute 14/16 20
FLUE (Indoor Boilers) Concentric Flue
Balanced Flue Assembly (mm) 125 (5”) 125 (5”)
Conventional flue Socket. (mm) 130 id. 130 id.
Flue Draught Reqd.(Min WG.) 0.040” 0.040”
Conventional Flue (MaxWG.) 0.15” 0.15”
MAINSWATER SUPPLY Limescale excess:When over 150/200 ppm.Fit appropriate scale reducer.
Pressure Max 5 bar Maximum Operating Pressure (Tested to 10 bar) (Fit pressure reducing valve as necessary)
Min 1 bar min. For user Comfort reduce pressure at tap to between 1 and 5 Bar.
Pressure Jet Oil Burners RIELLO RDB 2.2 up to C35 & RIELLO RDB 4.2 up to C58 - C73
Fuel C2 Kerosene
Electrical Supply 230v.AC 50HzTo be fused at 5amp.
TEMPERATURE CONTROL
Boiler Central Heating Control 60˚C - 80˚C+- 3˚C
Boiler Safety Limit 110˚C +- 3˚C
Tank (DHW)- Fixed 78˚C +- 3˚C
Early Alert - Fixed 87˚C +- 3˚C
Over-run - Fixed 93˚C +- 3˚C
HEATING SYSTEM (SEALED)
Fit in accordance with BS 7074
Part 1,BS 5449, OFTEC Standards,etc
Max.Operating Pressure 2.5 Bar
Max.System Pressure cold 1.5 Bar
Min.System Pressure cold 0.5 Bar + 0.3 Bar
BoilerTest Pressure 4.5 Bar
SafetyValve Operating
Pressure Gauge 0 to 4 Bar
WATER SIDE RESISTANCE
Flow RateTo Give A Nominal Output At 10k Differential
Flow Rate Measured (Kg h-1)2874.24
Waterside Resistance (mbar) 0.18
Flow RateTo Give A Nominal Output At 20k Differential
Flow Rate Measured(Kg h-1)1522.92
Waterside Resistance (mbar) 0.19
3
18
3.3 - COMBI
Firebird Enviromax Combi C Range Dimensions (mm)
Front View Side View RearView Top View
C.H. Flow & Return 22mm Copper• D.H.W. Mains Feed & Safety Valve 15mm Copper
1. Mains Feed
2. D.H.W.
3. 3 barSafety
Valve
4. C.H. Flow
5. C.H. Return
H
WD
B
A
C
B
695
630
650
215
95
140
185
1.
5. 4.
3.
2.
Model Output Weight Dimensions(mm)
Enviromax Kw/hrkg H W D A B C
Combi C20 173 845 670 605 750 220 155
Combi C26 176 845 670 605 750 220 155
Combi C35 179 845 670 605 750 220 155
Copper Pipe Not Plastic to be used for a minimum of 1 metre off the boiler