Certikin MB20S User guide

Operating, Installation and Servicing Instructions for
Indirect fi red condensing pool & spa heaters
M2709D
Models: MB20S, MB35S, MB50S
Genie
WARNING: If the information in these instructions are not followed exactly, a fi re
or explosion may result causing property damage, personal injury or death.
Do not store or use gasoline or other fl ammable vapours and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbour's phone. Follow the gas sup-
plier's instructions.
Installation and service must be performed by a Gas Safe registered installer, service
agency or the gas supplier.

PERFORMANCE SPECIFICATIONS
GAS CATEGORY, TYPE AND SUPPLY PRESSURE II2H3P G20 @ 20 mbar
G31 @ 37 mbar
NATURAL GAS PROPANE
MODEL MB20S MB35S MB50S MB20S MB35S MB50S
Corgi Work Code TBA 1036909 1036910 TBA 1036913 1036914
HEAT GROSS kW 21.5 38.0 51.5 23.1 38.0 51.5
INPUT Btu/h 73,305 129,650 179,100 78,941 129,650 179,100
NET kW 19.5 34.2 46.4 21.3 35.0 47.5
Btu/h 66,392 116,700 158,300 72,842 119,400 162,000
TYPICAL EFFICIENCY % gross 92 - 94 92 - 94 92 - 94 92 - 94 92 - 94 92 - 94
% net 102 - 104 102 - 104 102 - 104 102 - 104 102 - 104 102 - 104
HEAT kW 20.0 36.9 50.0 21.5 36.9 50.0
OUTPUT Btu/h 68,175 121,870 165,170 73,415 121,870 165,170
GAS RATE (NG, Propane) m3/h 1.98 3.45 4.64 0.87 1.43 1.9
MAXIMUM RATE, CO ppm 20 - 60 120-150 80-120 35 - 70 130-160 100-130
COMBUSTION SETTINGS, NG, CO2 % 8.7 - 8.8 8.9 - 9.1 8.9 - 9.1 9.9 - 10.1 9.5 - 10.5 9.5 - 10.0
OFFSET SETTING pA -3.0 -3.0 -3.0 -3.0 -3.0 -3.0
ORIFICE mm Not required 4.4 4.4 5.2
GENERAL SPECIFICATIONS
WATER CONTENT MB20S & MB35S/MB50S 3.0 Litres / 4.0 Litres
WEIGHT (net) MB20S & MB35S/MB50S 53 kg / 55kg
DIMENSIONS, OVERALL 375 mm wide, 520 mm deep, 980 mm high
SERVICE CLEARANCE 300mm Left, Right and Above. 800 mm Infront
CORE DRILL DIAMETER 175 mm
MINIMUM FLOW RATE 80 l/m (17.8 gpm)
MAX PRIMARY WATER PRESSURE 2½ bar (37 psi)
INTERNAL PUMP SETTING Speed 3
MAXIMUM POOL TEMP Pool 32°C (90°F) Spa 41°C (106°F)
ELECTRICAL SUPPLY 230V 50Hz, FUSED AT 5A, 130W
PROTECTION LEVEL IP44
FLUE SYSTEM 80/125 PP, to a max. Flue Equivalent Length of 20m
TECHNICAL DATA
GB, IE

Condensing Pool Heater Genie S
TECHNICAL DATA Inside cover
User Instructions 1
INTRODUCTION 3
Heater Location 3
Gas Supply 4
Conversion 4
Flueing 4
Air Supply 4
Outdoor Heaters 4
Flue Terminal Position 5
Condensate Drain 6
Pool Pump & Pipework 6
Winterisation 6
Electricity Supply 6
INSTALLATION OF HEATER 7
Procedure 7
Outdoor Terminal 7
Flue Systems 7
Wall Terminal 7
Flue Examples 12
Roof Terminal 12
Plumbing 12
Pressure Switch 12
Gas Conversion 13
Gas Connection 13
Condensate Connection 14
Electrical Connection 14
Commissioning 16
Control Setup 17
Multiple Heater Kit 18
Wall Mounting Kit 20
FAULT FINDING 23
Operation 23
Safety Controls & Lockouts 23
Engineering Mode 23
Test Temperature Disp.Mode 23
Display Fault Codes 24/26
SERVICING 25
Routine Service 27
Changing Components 27
Spares 30
Heater Components 31
List of Figures
Page
Fig 1.0 Flue Terminal Positions 5
Fig 2.0 Hydraulic Resistance Graph 6
Fig 3.0 Outdoor Terminal Fixing 7
Fig 3.1 Service Access &
Pipe Connections 8
Fig 3.2 Wall Terminal Dimensions 8
Fig 3.3 Outdoor Terminal Dimensions 9
Fig 3.4 Roof Terminal Dimensions 9
Fig 4.0 Wall Terminal Installation 10
Fig 4.1 Extended Wall Terminal
Installation 10
Fig 4.2 Extended Vertical Roof
Installation 10
Fig 4.3 Outdoor Terminal Installation 10
Fig 5.0 Pressure Switch 12
Fig 6.0 Throttle Adjustment 13
Fig 6.1 Orifi ce Position 13
Fig 6.2 Gas Valve Tappings 14
Fig 7.0 Condensate Disposal 15
Fig 7.1 Condensate Syphon 15
Fig 8.0 Heat Exchanger Air Vent 16
Fig 8.1 Pump Priming Button 16
Fig 8.2 Heat Exchanger Sight Glass 16
Fig 9.0 Controls 17
Fig 10.0 Multiple Heater Install 18
Fig 10.1 Multiple Heater Install 18
Fig 10.2 Multiple Heater Install 19
Fig 10.3 Wall Mounted Heater 20
Fig 10.4 Wall Mounting Dimensions 20
Fig 10.5 Wall Mounting Assembly 21
Fig 11.0 Schematic Wiring 22
Fig 12.0 Electrode gap setting 27
Fig 13.0 Electrical Components 30
Fig 14.0 Heater Components 31
Section Page
Contents

Condensing Pool Heater Genie S
Before Start Up
Keep heater area clear and free from combustibles,
fl ammable liquids and chemicals.
Pool water must be fl owing through the Heater and
the Heater pressure gauge showing between 1.5 to
2.5 bar for it to operate.
Quick Start
Check that the Electricity and Gas Supplies are on.
Turn on the Pool Pump. Turn on the Heater with the
switch on the Front Panel and set the desired tem-
perature with the Pool Temperature Knob. In a few
seconds the Heater will fi re.
Summary of Controls (Left to Right)
Pressure Gauge - This should be between 1.5 to
2.5 bar, repressurise if too low.
ON/OFF Switch - Turns the Heater On and Off .
Lock/Reset Button - If it is pressed for 2 seconds
it locks the Set Temperature so the Pool Tempera-
ture Knob is inoperative. To unlock, press again for 2
seconds. When locked a short press fl ashes the Set
temperature.
It also resets Gas Control lockouts, GAS and OH2.
Pool Temperature Display - This normally
shows the Pool Temperature but also shows the
Setting Temperature when the Pool Temperature
Control Knob is moved. The Display is also used for
commissioning and diagnostic purposes. (Page 17)
If the display alternates the temperature with ‘SEr’ it
is recommended that the Heater is serviced. In the
mean time the heater will continue to function.
1
Genie USER’S OPERATING INSTRUCTIONS
FOR YOUR SAFETY - READ BEFORE OPERATING
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION
MAY RESULT, CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
This appliance is equipped with an ignition device
which automatically lights the burner.
BEFORE OPERATING after a prolonged time off ,
smell all around the appliance area for gas. Be
sure to smell next to the fl oor because some gas
is heavier than air and will settle on the fl oor.
WHAT TO DO IF YOU SMELL GAS
* Do not try to light any appliance
* Do not touch any electric switch
* Do not use any phone in your building.
* Immediately call your gas supplier
from a neighbour’s phone. Follow the
gas supplier’s instructions.
* If you cannot reach your gas supplier,
call the fi re service.
* Isolate the appliance with the Service
Cock inside. If this is not accessible,
isolate at the gas meter.
* Do not use this appliance if any part
has been under water. Immediately
call a qualifi ed service engineer to
inspect the appliance and to replace
any part of the control system and any
gas control which has been damaged.
CAUTION: Propane gas is heavier than air and
will settle on the ground. Since it can accumulate
in confi ned areas, extra care should be exercised
when lighting Propane heaters.
WARNING: There are no user serviceable items
in this appliance. Do not interfere with any sealed
components.
IMPORTANT INFORMATION
Incorrect water balance will cause premature
failure of this heater. Such damage is not covered
under warranty. For additional information please
see page 3 of these Instructions.
On/Off Switch Reset/Lock
Button
Temperature
Display
Pool Temperature
Control Knob
Pressure
Gauge

Condensing Pool Heater Genie S
2
Pool Demand LED - Green
Off - There is no pool heating demand.
On - There is pool heating demand and the pool is
not up to temperature.
Flashing - The pool heating demand is met, the pool
is up to temperature.
Pool Temperature Control Knob
16°C to 32°C (60°F to 90°F)
(Maximum is changed in Setup Mode, see Page 17)
Rotate clockwise to increase the pool temperature.
The setting temperature is shown whilst rotating the
control knob and when released fl ashes 3 times to
confi rm setting..
To lock the required temperature setting see
Lock/Reset button Page 1
Pool Pump Pressure
- Yellow LED, Display, Pool Temperature
On - If the pump is operating and there is insuffi cient
pressure, possibly due to a blocked pool fi lter. The
heater will not operate.
Overheat - Flashing Red LED, Display “OH2”
Flashing - This indicates the heater has overheated
and it has shutdown. Wait for the heater to cool then
press the Lock/Reset button to start the heater again.
If this problem persists this should be investigated by
a service engineer.
Overheat - Red & Yellow LED, Display “GAS”
On - This indicates the Heater Gas Ignition Control
has locked out. Press the Lock/Reset Button to start
the Heater again. If this problem persists this should
be investigated by a Service Engineer.
Condensate - Display “HI”
This indicates that the condensate drain is blocked
and the heater has shutdown. When the blockage is
cleared, the heater will operate again.
Water Pressure Switch
A water pressure switch is provided in the heater
to shut off the burner in the event that water supply
is interrupted. The water pressure switch should
be checked and adjusted for proper operation by a
qualifi ed service person at the time of installation,
and thereafter checked at each service.
Operation without water circulation may
cause rapid and severe damage to the
heater.
Water Temperature Settings
The heater is designed to provide maximum heat
output up to one degree below the set point. Power is
reduced for the last one degree to maximise control.
For some installations, if the pool is used before it is
up to set point, the water entering the pool from the
heater could be noticeably warmer than the pool.
This is not a fault but part of the design. It will reduce
for the fi nal degree up to set temperature.
CAUTION: Elevated water
temperature can be hazardous.
It is important to follow these
guidelines:
1. Spa or hot tub water temperatures should never
exceed 40°C (104°F). A temperature of 38°C
(100°F) is considered safe for a healthy adult.
Special caution is suggested for young children.
2. Drinking of alcoholic beverages before or during
spa or hot tub use can cause drowsiness which
could lead to unconsciousness and drowning.
3. Pregnant Women Beware! Water over 38°C
(100°F) can be dangerous, especially during the
fi rst three months of pregnancy. Please seek
medical advice before using pools and hot tubs.
4. Before entering the spa or hot tub, users should
check the water temperature with an accurate
thermometer.
5. Persons with a medical history of heart disease,
circulatory problems, diabetes, or blood pressure
problems should obtain a doctor’s advice before
using pools or hot tubs.
6. Persons taking medications which induce drowsi-
ness, such as tranquilizers, antihistamines, or
anticoagulant, should not use spas or hot tubs.
Chemistry
Please see page 3 for the maximum levels and the
procedural requirements for adding chemicals
Cleaning
It is recommended that periodically the casing is cleaned
and sprayed with WD40 or similar liquid, and any ex-
posed threads are lightly coated in grease.
Service & Maintenance
It is recommended that the Heater is serviced every
2000 hours of operation, for normal use this is about
12 months. The control will alert when you when it
reaches this period by its display, ‘SEr’ alternating
with the temperature. It is a mandatory requirement
that any gas work carried out must be by a Registered
engineer with an appropriate accreditation.
Winterisation & Anti-freeze Inhibitor
As supplied the heater includes a dose of Sentinel
X500 anti-freeze/inhibitor. Subject to not being re-
moved or diluted, the appliance is protected to -10oC.
If the primary circuit of the appliance is drained for any
reason, the correct quantity of new anti-freeze/inhibitor
must be added to give the level of protection required.
The swimming pool water is not protected against
freezing. Please contact your pool installer for guid-
ance on how to protect this pool heater from damage
caused by frozen pool water.
Failure to follow these guidelines could cause
damage to the heater which will not be covered by
warranty.

Condensing Pool Heater Genie S
Gas Safety (Installation and Use)
Regulations, (as amended).
It is the law that all gas appliances are installed by
a competent person (e.g. a Registered operative) in
accordance with the above Regulations. Failure to
install appliances correctly could lead to prosecution.
It is in your own interest, and that of safety, to ensure
that the law is complied with. The installation of the
Heater MUST also be in accordance with the cur-
rent I.E.T. Wiring Regulations, the Local Building
Regulations, Building Standards (Scotland), the Bye
Laws of the Local Water Undertaking, any relevant
requirements of the Local Authority.
Detailed recommendations are contained in the fol-
lowing British Standard Codes of Practice.
Codes of Practice.
BS.6798 Installation of gas fi red hot water boilers of
rated input not exceeding 70kW.
BS.5440: Part1 and Part 2. Flues (for gas appliances
of rated input not exceeding 70kW).
BS 6891 Specifi cation for installation of low pressure
gas pipework.
BS5482:1 Code of practice for domestic butane &
propane gas burning installations.
Building Regulations Part L1.
IMPORTANT.
No external control devices should be directly con-
nected to this appliance - unless covered by these
‘Installation and Servicing Instructions’ or otherwise
recommended by the manufacturer. If in doubt,
please enquire.
Any direct connection of a control device not
recommended by the manufacturer could infringe
the Gas Safety (Installation & Use) Regulations, the
above regulations and the normal appliance war-
ranty.
Manufacturer’s notes must NOT be taken, in any
way, as overriding statutory obligations.
Location of Heater
The Heater MUST be installed on a fl at and level
fl oor, capable of adequately supporting the weight of
the Heater and any ancillary equipment.
Provision is provided for the heater to be fi xed to the
fl oor.
It is IP 44 Rated and can be installed out of doors in
a suitable position. In all cases the choice of position
should take into account the fl ue, the plume and the
condensate drainage.
INTRODUCTION
These Instructions cover a range of indirect, fl oor
mounted, gas fi red, condensing pool heaters which
are room sealed and fan assisted. The fl ue system
available is concentric, left, right, rear, and vertical,
all up to 20 metres ‘FEL’. There is also an Outdoor
Top terminal for use where the Heater is installed
out of doors. The ignition system is fully automatic.
There are three models with diff erent outputs - see
the Technical Data on Inside Cover for details.
These models can be installed in multiples to obtain
a larger, combined output.
The casing is of green and black polyester powder
coated mild steel. The Heaters use a high perform-
ance Cupro Nickel heat exchanger and are suitable
for connection to pools using chlorinated and salt
chlorinated water provided the following levels of
chemicals are maintained.
pH 7.2 to 7.8
Total Alkalinity 80 to 140 ppm
Calcium Hardness 200 to 400 ppm
Salt maximum 30000 ppm
Free Chlorine 1 to 4 ppm
All chemicals must be introduced and completely
diluted into the pool water before being circulated
through a fi ring heater. Do not place chlorine tablets
or bromine sticks in the skimmer, high chemical con-
centrations will result when the pump is not operat-
ing. Turn the Heater off when shock dosing
Chlorinators must feed downstream of the heater
and have an anti-siphoning device to prevent chemi-
cal back-up into the heater when the pump is shut
off .
High chemical concentrates from feeders
and chlorinators that are out of adjustment
will cause corrosion to the heat exchanger
inside the appliance. Such damage is
not covered under the warranty.
3

Condensing Pool Heater Genie S
Conversion
For countries permitted to use diff erent gases the
appliance is supplied setup for the primary gas. It
can be converted to the alternative by the addition
of an Orifi ce which is supplied with the heater. See
page the inside cover for the data and Page 12 for
conversion instructions.
Flueing
Only fl ue components specifi ed by the Manufacturer
should be used with these appliances. Detailed rec-
ommendations for fl ueing are given in BS.5440: The
following notes are intended for general guidance.
1. Be aware of the plume from the fl ue and the
wetting eff ect it can have to adjacent property.
see Flue terminal location diagram 1.0 page 5,
2. The fl ue can be taken upwards, left, right or to
the rear of the appliance, but never downwards.
3. The Heater is supplied separate to the chosen
fl ue set. It can be fi tted with up to 20 metres
equivalent length of Concentric fl ue, see pages
8 - 11 for fl ue examples and parts selection.
4
IMPORTANT
If the Heater is to be fi tted in a timber framed build-
ing it should be fi tted in accordance with the Brit-
ish Gas publication ‘Guide for Gas Installations in
Timber Frame Housing’, reference DM2. If in doubt,
advice must be sought from the Local Gas Region of
British Gas.
The Heater may be installed in any room or internal
space. Particular attention is drawn to the require-
ments of the current I.E.T. Wiring regulations and,
in Scotland, the electrical provisions of the Building
Regulations applicable to Scotland with respect to
the installation of the boiler in a room or internal
space containing a bath or shower.
Where a room sealed appliance is installed in a
room containing a bath or shower then the appliance
and any electrical switch or appliance control, utilis-
ing mains electricity should be so situated that it
cannot be touched by a person using the bath or
shower.
Where installation will be in an unusual location then
special procedures may be necessary and BS.6798
gives detailed guidance on this aspect.
A compartment used to enclose the Heater MUST
be designed and constructed specially for this
purpose. An existing cupboard, or compartment,
may be used provided it is modifi ed for the purpose.
Details of essential features of cupboard compart-
ment design, including airing cupboard installations
are given in BS.6798.
In siting the Heater, the following limitations MUST
be observed:
1. The position selected for installation MUST allow
adequate space for servicing in front of the boiler
and for air circulation around the boiler.
2. This position MUST also permit the provision of a
satisfactory balanced fl ue termination.
3. This position MUST also permit the provision of a
satisfactory connection to the condensate drain.
Gas Supply
An existing meter and pipework should be checked,
preferably by the Gas Supplier, to ensure that they
are adequate to deal with the rate of gas supply
required.
Supply pipes should be sized to suit installation
and obtain a working pressure of 20 mbar (NG), 37
mbar (Propane) 29 mbar (Butane). Installation pipes
should be fi tted in accordance with BS.6891.
A Natural Gas Heater must be connected to a gov-
erned meter.
ESSENTIAL
It is absolutely ESSENTIAL to ensure in practice,
that products of combustion discharging from the
terminal cannot re-enter the building, or any other
adjacent building, through ventilators, windows,
doors, other sources of natural air infi ltration or
forced ventilation/air conditioning.
If this should occur, the appliance MUST be turned
OFF IMMEDIATELY and the Local Supplier con-
sulted.
Air Supply
It is NOT necessary to have a purpose provided air
vent in the room or internal space in which the boiler
is installed.
Where the boiler is installed in a cupboard or com-
partment no air vents are required.
However the user may wish to ensure that it is venti-
lated to provide air circulation.
Outdoor Heaters
These Heaters are certifi ed for outdoor installation,
when equipped with the approved terminal.
WARNING
The heater shall not be located in an area where
water sprinklers, or other devices, may cause water
to spray through the cabinet openings and into the
heater. This could cause heavy internal rusting or
damage some electrical components, and this would
void the warranty.
It is recommended that periodically the casing is
cleaned and sprayed with WD40 or similar liquid, and
any exposed threads are lightly coated in grease.

Condensing Pool Heater Genie S
Minimum Distance mm
A Directly below an opening, air brick, opening window etc. 300
B Above an opening, air brick, opening window etc. 300
C Horizontally to an opening, air brick, opening window etc. 300
D Below a gutter or sanitary pipework 75
E Below the eaves 200
F Below a balcony or carport roof 200
G From vertical drain or soil pipework 150
H From an internal or external corner 300
I Above ground, roof or balcony level 300
J From a surface or a boundary line facing a terminal 600
K From a terminal facing a terminal (Horizontal fl ue) 1200
K From a terminal facing a terminal (Vertical fl ue) 600
L From a opening in a carport (e.g. door, windows) into the building 1200
M Vertically from a terminal on the same wall 1500
N Horizontally from a terminal on the same wall 300
R From an adjacent wall to fl ue (Vertical only) 300
S From an adjacent opening window (vertical only) 1000
T Adjacent to windows or openings on pitched and fl at roofs 600
U Below windows or opening on pitched roofs 2000
Fig. 1.0
5
Flue terminal positions

Condensing Pool Heater Genie S
Winterisation
Turn off the Mains electricity and Gas Supply.
As supplied the Heater includes one litre of Sentinel
X500 Inhibitor/Anti-freeze, this is suffi cient to protect
the Heater down to -10°C. It is recommended that
this is maintained and so should be replenished if
there is a loss of primary water. See Fig 14.0
Draining the Heater can be achieved by fi tting the
drain assembly in place of the double check valve/
hose connector. The Condensate Syphon can be
drained by removal of its Drain Cap. See Fig 7.1
Electricity Supply
Wiring external to the appliance MUST be in accord-
ance with the current I.E.T. Wiring Regulations and
any Local Regulations that apply.
The Heater is supplied with a plug and lead for 230V
~ 50Hz. Single phase. Fuse rating is 5A.
The method of connection to the mains electricity
supply MUST facilitate complete electrical isola-
tion of the Heater, preferably by the use of a fused
double pole switch having a 3mm (1/8in.) contact
separation in both poles and servicing only the
Heater and its controls.
The point of connection to the mains should be
readily accessible and adjacent to the Heater.
Where a Heater is installed in a room
containing a pool or shower, the appliance,
any electrical switch or appliance control
utilising mains electricity should be so
situated that it cannot be touched.
6
Condensate Drain
See Fig. 7.0, and 7.1
A 75mm condensate trap is provided on the Heater
and is satisfactory when connected to Soakaways,
Gullies, Rainwater Pipework and Internal Drainage
systems. All pipework and fi ttings in the condensate
drainage system MUST be made of plastic, unless
they carry other liquid waste. No other materials
may be used. The pipework should be insulated if
run out of doors.
The drain outlet on the boiler is :
40 mm Hunter waste pipe.
Pool Pump & Pipe work
The Heater is an indirect design and uses two very
high performance heat exchangers. The pool water
passes through the Secondary, the water in the
Primary is completely separate. The Heaters con-
trols modulate the input when approaching the set
temperature for greater accuracy and economy. It
is recommended that pool pump overrun is used to
maximise the life of the Heater.
If a new pump is being fi tted consult the Pressure
Loss graph (Fig 2.0) to determine its size.
The Heater is provided with both 1½” and 50mm
plastic pool connections. As built the connections
are ‘From Pool’ on the left, ‘To Pool’ on the right,
however these can be easily reversed.
With the exception of automatic dosing equipment,
the Heater should be plumbed as the last piece of
equipment before the pool.
It is permissible to fi t an isolating valves on the pipe-
work on either side of the Heater. In these circum-
stances it is recommended to fi t a fl ow switch in the
Heaters Mains supply.
Fig. 2.0

Condensing Pool Heater Genie S
Space required for installation and
servicing:
Left, right and above 300mm
Front 800mm
Suggested procedure:
Site to suit the pool, terminal, plume and condensate
drain limitations. The Terminal position should follow
BS 5440 and be at least 600mm away from any
opening or obstacle.
1. For an indoor installation only : Mark & Drill
Flue hole. (See Fig. 3.1 and 3.2 for dimensions)
2. Fix the Heater to the fl oor using the holes pro-
vided in the front channel.
3. The Heater is provided with an Electrical Plug and
lead. This can be connected to a suitable supply
as detailed on Page 5. If it is required to sepa-
rately time the operating of the Heater this can be
achieved as follows:
 Remove Front Top Panel after releasing the
retaining M5 screw under the lip.
 Remove the Electrical Cover to access the
Mains connector.
 Pull out the Mains connector and replace
the Mains lead and link wire with a
Permanent and Switched live supply.
See Fig 11.0
4. Pipe to the 22mm gas connection. A gas isolating
valve is provided on the Heater Gas Valve.
5. Plumb to the Pool Pump and Filter.
6. Fill Primary system with water using the supplied
hose connector. The Heater is supplied with one
litre of Sentinel X500 Inhibitor/ Anti-Freeze in the
pipework.
7. IMPORTANT. Remove the air from the primary
through the Air Vent on the right-hand Side Panel
and the Vent on the top of the Primary Heat Ex-
changer. (See Fig 8.0) by operating the internal
pump in short one second bursts, venting, then
pumping, until it has all been removed. There is
a special button (See Fig. 8.1) for operating the
pump on its own, under the chassis on the pres-
sure gauge side. To operate the Mains must be
connected and on.
8. Test for leaks.
9. Replace the Electrical Cover and Panels.
Assembly of the Outdoor Terminal
A specifi c Outdoor Top Terminal must be used for an
outdoor installation. There must be at least 600mm
clearance around the terminal and complete clear-
ance above. The Outdoor Top Terminal is a push fi t
into the Flue Adapter and locked in position with a
clamping ring. (See Fig. 3.0 & 3.3)
If lubrication is required only Centra Cerin or
silicone grease should be used.
7
All Other Flue Systems
The maximum Flue Equivalent Length (FEL) permit-
ted is 20 metres, horizontal or vertical. The compo-
nent parts have the following FELs:
1 metre of concentric fl ue 1.0
2 metres of concentric fl ue 2.0
A 45 degree concentric bend 1.1
A 90 degree concentric bend 1.5
A concentric Roof Terminal 3.3
A concentric Wall Terminal 3.9
Sum of the Flue Equivalent Lengths used in
the design this must not exceed 20 metres.
All items assemble by a push fi t/clamp system. If it is
required to lubricate the seals only Centra Cerin sup-
plied by the manufacturer or Silicone Grease should
be used. The pipes should be assembled so the
socket end is always furthest from the Heater. Flues
should be supported by brackets every metre of run.
Horizontal fl ues should incline back to the Heater by
3 degrees (5mm in 100mm)
Wall Terminal
The Horizontal Wall Terminal is supplied with two
rubber wall plates, one for inside and one for the
outside. The core drill diameter required is 175mm
and should incline upwards to the outside.
Because of the incline the height of the centre of the
fl ue hole on the wall is determined by the distance of
the heater from it. Calculate as follows:
1. Ensure service clearance is available.
2. Fit the 90 degree elbow to the heater and
measure from its outlet face to the wall.
3. Add 5 mm for every 100 mm distance.
Example: Distance measured = 480 mm
(5 x 480) / 100 = 25 mm
Flue centre 1065 + 25 = 1090mm
If it is required to reduce the length of the Terminal
the minimum overall length is 300mm. The Flue duct
should be cut 10mm longer than the Air duct.
Fig. 3.0
INSTALLATION OF HEATER

Condensing Pool Heater Genie S
Heater Dimensions
Pipe Connections
& Locations
8
Fig. 3.1
Dimensions
Model A B C
Genie 20 / 35 138mm 226mm 361mm
Genie 50 170mm 258mm 425mm D
E
Connections
D Multi Heater Connection
E Electric & External Control (CCP01)
F Gas Supply - 22mm Copper
G Safety Valve Outlet - 15mm Copper
H Condensate Drain - 1¼” or 40mm Hunter Plastic
I From Pool - 1½” / 50 mm Plastic Demountable Fittings
Fig. 3.2
Service Access
Left, Right or Above 300mm
In Front 800mm
Rear Flue Left/Right Flue
Horizontal Wall Terminal
Dimensions
Horizontal Wall Terminal
(MBHT)
F
G
H
I
374
78 90
134
A
B
307
C
533
SW WT
WT 136 188
1000mm

Condensing Pool Heater Genie S
Outdoor Terminal
Dimensions
9
Fig. 3.3
Outdoor Flue Terminal
(MBOT)
Fig. 3.4
Clamp Assembly Screw
Pitched Roof Instal-
lation
Vertical Roof Terminal
Dimensions Flat Roof
Installation
Use Seldeck Flashing
System for all Roof
Installations
Vertical Roof Terminal
(MBVT)
1 metre Horizontal/
Vertical Extension Pipe
(MBHVE)
45 degree bends
(MB45DB)

Condensing Pool Heater Genie S
10
Flue Examples
Flue Kit Part Codes
Type of Flue System
Kit Code Description Outdoor Kit Horizontal Terminal Vertical Terminal
MBHT Horizontal Wall Terminal n/a Yes n/a
MBHVE 1 metre Horizontal/Vertical Extension Pipe n/a Option Option
MBVT Vertical Roof Terminal n/a n/a Yes
MBOT Outdoor Terminal Yes n/a n/a
MB45DB 45 degree bend n/a Option Option
MB90DB 90 degree bend n/a Option n/a
Outdoor Terminal
Extended Horizontal
Wall Terminal
Extended Vertical
Roof Terminal
Horizontal Wall Terminal
MBOT
MB90DB
MBHVE
MBHT
(not shown)
TO OFFSET
USE MB45DB
MB90DB
MBHT
(not shown)
MBVT
MBHVE
TO OFFSET
USE MB45DB
Fig.4.3
Fig.4.0
Fig.4.1
Fig.4.2
Determine the type of Flue system you require and
choose from the list of kits available below:

Condensing Pool Heater Genie S
11
Flue Kit Part Codes (cont.)
Kit Code Description FEL Photo of Kit
MBHT Horizontal Wall Terminal 3.9m
MBHVE 1 metre Horiz./Vertical Extension Pipe 1.0m
MBVT Vertical Roof Terminal 3.3m
MBOT Outdoor Terminal n/a
MB45DB 45 degree bends (pair) 1.1m
MB90DB 90 degree bend 1.5m
Flue
Equivalent
Length (m)
The Maximum Flue Equivalent Length (FEL) permitted is 20 metres, horizontal or vertical. The Flue Kits avail-
able below list the FEL for each component. Add up all the FEL’s used in your design and check that this does
not exceed 20 metres. (see page 7)
(per bend)

Condensing Pool Heater Genie S
12
Terminal Guard
The fl ue products from this appliance are very
low temperature so a guard is only required if the
terminal is in a position where it may be damaged.
A suitable guard is available from:
TFC Ltd. 01732 351555, Model DK6
Roof Terminal
The Vertical Roof Terminal should be fi tted in a
minimum of 300mm clear unobstructed space. It is
not permitted to alter the construction of the Ter-
minal, above the roof line, however the concentric
section below the roof line can be altered to suit
the installation.
It is recommended that:
1. The Installation of the fl ues are completed
before their connection to the Heater. This will
ensure that any debris that gets into the fl ues
can be cleared.
2. That bends in vertical fl ues are 45 degrees.
3. Flues may be reduced in length by cutting. The
inner Flue pipe should be cut so it is 5 to 10mm
longer than the outer Air duct. It will ease as-
sembly if the cut edges are cleaned, chamfered
and greased before assembly.
Plumbing
The heater requires water fl ow and pressure to op-
erate properly. It must therefore be installed down-
stream of the fi lter and pump. A typical installation is
plumbed as follows:
1. The Pump outlet is plumbed to the inlet of the Filter.
2. The outlet side of the Filter is then plumbed to the
inlet of the Heater.
3. The outlet of the Heater is plumbed to the return
line to the pool or spa. The Pump, Filter and Heater
are plumbed in series.
If it is necessary to install a valve on the return to
the pool then it is recommended that a fl ow switch
is installed and interlocked with the Heater supply.
The Heater must be located so that any water leaks
will not damage the structure of adjacent area. The
heat shunt connections of the Heater, can be made
in standard plastic 1½” or 50mm pipe supplied de-
mountable.
Use the pressure loss chart on page 6 to specify a
suitable pump.
Connection to the Heater can be made from either
left to right, or right to left, it is supplied with the
‘From Pool’ connection on the left. To change, undo
Fig. 5.0
the demount connection on the right, complete
with blanking plates, and swap with the connec-
tions on the left. Ensure that the Pool Sensor is
correctly positioned in its pocket after the change.
Flow Rate
The Heaters have a very low resistance to the
Pool Water fl ow and will tolerate a wide range of
fl ows.
The minimum recommended fl ow is:
80 litres/min
Pressure Switch
The Heater is protected by an adjustable wa-
ter pressure switch that has to close before the
Heater will operate.
It is very important to verify that it turns
off when the water fl ow is interrupted.
It has an adjustment range equivalent to ±1.5 me-
tres. The switch is factory set for most conditions
but can be altered if required:
1. With the pump on turn the knurled nut clock-
wise until a click is heard.
2. Turn the nut anti-clockwise a quarter of a turn.
3. Turn the pump on and off to check the switch
operates correctly.

Condensing Pool Heater Genie S
Conversion to LPG
The Heater can be converted on site. NG to Propane,
or Propane to Butane.
1. With the gas and electrical supply off , undo the
three screws that hold the venturi to the gas
valve. (See Fig.6.0)
2. Allow the gas valve to drop away from the venturi.
3. Fit the conversion orifi ce into the rubber seal that
sits in the gas valve. (See Fig.6.1)
4. Re-assemble the gas valve and venturi.
5. Affi x the new LPG serial number data label sup-
plied over the existing.
6. Turn gas on and check for leaks.
7. If converting an MB50S initially turn the throttle
adjustment screw four turns anti-clockwise
8. Operate heater and if necessary turn the throttle
screw anit-clockwise another turn until ignition is
achieved.
9. Allow fi ve minutes for the heater to warm up be-
fore checking and adjusting the CO2. Adjust using
the throttle screw to the values on the data plate.
10. Replace the dust cover over the throttle, when
adjustment is complete.
LPG to NG Conversion
The method is as detailed above except the steps are
reversed (if converting an MB50S remember to ini-
tially turn the throttle screw fi ve turns clockwise before
operating the heater).
The orifi ce is removed and the venturi and gas valve
reassembled with just the rubber seal between them.
A new serial number data plate should be obtained
from the manufacturer and affi xed over the existing.
Gas Connection
The 22mm copper gas connection provided can be
positioned to exit the Heater from either the left or the
right. A minimum of 20mb. (NG), 37mb (propane) 28
mbar (butane) must be available at the Heater inlet,
with the Heater and other connected appliances fi ring.
NB: If the gas valve test point is used there is a
2-2.5 mbar drop for the Genie 50 at full rate.
Check for gas tightness (B.S. 6891: 1988) in pipe-
work to boiler using a manometer.(See Fig. 6.2) Gas
and combustion soundness within the Heater should
be checked using sense of smell and leak detection
fl uid. Check the maximum rate and combustion are to
specifi cation.
See Table 6.0 and Data table Inside Cover.
Rating Table (38.8Mj/m3)
13
kW
gross
Btu/h sec/ft3m3/2 mins
7.5 25,590 145 0.023
12.5 42,650 87 0.039
20 68,240 55 0.062
34.6 108,055 31.5 0.107
52 177,420 21 0.161
Table 6.0
Inlet pressure
tapping
Off set
connection
Fig. 6.0
Fig. 6.2
Throttle
Adjustment
Fig. 6.1
Orifi ce in position

Condensing Pool Heater Genie S
14
Condensate Connection
The direction of the plastic condensate drain pipe
connection can be altered from the factory position
on the left, to the right.
• Remove the blanking plate from the right hand
side (See Fig. 3.1).
• Loosen the two screws holding the Trap
bracket and swivel the trap through 90 degrees.
• Secure the bracket and fi t the supplied 40 mm
pipe.
• Example installations are shown in Fig 7.0.
• Fit blanking plate to the left hand side (See Fig
7.1).
Where possible an internal termination of the con-
densate discharge pipework should be used. If this
is not possible external pipes should be kept as
short as possible and insulated.
Where fi tted in pipework that includes another trap
or a pump, for example the fi lter backwash pipework
to drain, an Air Break should be fi tted between the
Heater and that pipework. Avoid connecting to a
kitchen sink trap as the solids and fats in the drain
will cause a blockage.
It is permissible to connect to an external gully or
rain water hopper provided they connect to a com-
bined system.
The condensate should not be run into a ‘grey water’
recycle system.
If the condensate pipe is connected to a stack it
should join not less than 450 mm above the foot of
the stack. In addition it should be positioned so there
no chance of cross-fl ow to another connection.
Installation pipework must be in 40 mm Hunter plas-
tic pipe to a suitable drain location with a gradient
of 2.5° (45mm/ metre run) minimum. If connected to
another drainage trap, an air break is required be-
tween the Heater drain and that trap. (See Fig.7.0 &
7.1). External runs, should, if possible, be insulated
to help prevent the condense liquid freezing.
Check during commissioning that there is a leak free
working connection from the Heater to the drain.
The simplest way to do this is to carefully pour some
water into the boiler fl ue and check it emerges at the
drain. This will also fi ll the trap ready for operation.
Electrical Connections
WARNING: The appliance
MUST be earthed.
All wiring for the Heater and system controls MUST
conform to I.E.T. Wiring Regulations, and work
should be tested using a suitable meter, for Earth
Continuity, Polarity, Short Circuit and Resistance to
Earth.
The Heater supply must be through a common iso-
lator, a double pole 5A fused isolating switch with a
contact separation of 3mm minimum on both poles.
The cable used should be no less than 0.75mm2 to
BS.6500 PVC, 3 core, and fi xed ensuring the earth
connection is longer than the Live and Neutral.
Access to the Heater connections is made by the
removal of the Front Top Panel and the Electrical
Chassis cover, two screws.
The simplest and most fl exible control scheme is to
use a Certikin CCP01 Control Unit. This provides an
electrical safety trip and timer with outputs for the
Heater, lights and an auxilary voltage free output. It
is pre-wired and tested and provided in a standard
IP55 plastic control box.
The Heater’s internal wiring is shown in Fig.11.0.
Connections are as follows :-
4 Way Terminal Supply Connection
Earth
N Mains Neutral
SL Switched Live
L Permanent Live
A factory installed link has been fi tted between SL
and L which should be removed if the Heater is to
have its own switched supply.
For systems using an external programmer, the
electrical wiring should follow the relevant control
manufacturer’s recommendations, with the switched
live from the controls returning to SL in the 4 way
push-fi t connector.
It is possible to connect several Heaters together
using the Multiple Heater Kit. Details for the parts
and installation of this kit are given on Page 18.

Condensing Pool Heater Genie S
Example Condensate Disposal Methods
Condensate
Drain from
Heater
Condensate Pressure
Switch Pipe
Connection
Connect To
Waste
(Option to
exit Heater
left or right)
Drain Cap, (behind vessel)
can be removed for
Winterisation
Condensate Syphon (75 mm)
15
Fig.7.1
Removable Plate
(Use to close off
unused Waste exit
on panels)
1:20 Fall ( 2.5 Degrees )
Strap-On
Boss
200mm Land Drain
Filled with Lime
chippings 400mm
deep
Insulate against
freezing
Note: Do not reduce the pipe size below the 40mm provided.
Fig.7.0
Soakaway
Stack Attachment
Soil Pipe or
Drain

Condensing Pool Heater Genie S
16
Fig. 8.2
Commissioning
IMPORTANT The heater primary circuit
contains Sentinel X500 inhibitor/anti-freeze.
The minimum water should be released
during fi lling to maintain its concentration.
The elimination of air from the heat exchanger is es-
sential to maximise the life of the heater. It is strongly
recommended that the heater is fi rst operated with the
GAS OFF until the air has been purged.
If air has not been released then there is a possibility of
the heater overheating and triggering one of its safety
thermostats. An Air Vent is provided on the top of the
Heat Exchanger (See Fig 8.0) to assist its removal. It is
opened and closed by rotating the front connector.
A second vent is a standard radiator vent in the right-
hand Side Panel.
A button has been provided to just operate the internal
pump (See Fig 8.1) to aid de-aerating. Mains connec-
tion to heater required. See Page 6 for more details.
Commissioning Procedure
The heater control is factory set to display in fahrenheit
and work to a maximum temperature of 90°F (32°C).
If a centigrade display or higher temperature 106°F
(41°C) maximum is required, enter User Setup Mode.
(See Page 17)
The boiler is factory set for Natural Gas and fi tted with
automatic ignition and will start when the gas cock is
open, mains is connected and the pressure switch is
activated by the pool pump. (for greater detail about
the internal controls see the Maintenance section,
Fault Diagnosis)LPG models require to be modifi ed as
described on page 12.
Fig. 8.0
It is recommended that the condensate trap is full of
water before fi ring. If the heater fails to light the gas it
will shutdown and try again. It will repeat this a total of 5
times and then locks out. This will show as the Red LED
lit and ‘GAS’ on the display. Press the Lock/Reset button
to start another 5 attempts.
It is possible with the front door off to see when the
burner is lit through the sight glass (See Fig. 8.2).
After the burner has been lit for a few minutes the gas
rate and combustion should be checked, see the Tech-
nical Data on Inside Cover for details.
The heater is factory set and should not require adjust-
ment. When the heater has been operating for at least
10 minutes check all joints, gas and water, for leaks, and
correct where necessary.
When operating satisfactorily, complete the commission-
ing details on the inside back page of these instructions.
The boiler is fi tted with a syphon trap that includes
a blocked drain detection device. This is to
safeguard the boiler from a blockage or the
possible freezing of the condensate pipe work in
extreme weather.
Should this happen the control will lockout and the display
will show ‘HI’, as in “condensate level is high”. See the
Fault Finding section for more details.
This will have to be corrected before the heater will operate.
The user should be made aware of this feature and, that in
the event of blocked or frozen condensate pipework, the
boiler will automatically stop functioning.
It will start again as soon as the blockage has cleared.
Finally, instruct the user on heaters operation and controls.
Fig. 8.1
Button

Condensing Pool Heater Genie S
17
User Setup Mode
Switch on with the panel switch whilst pressing the Lock/Reset button. then release. The control is now in
Setup Mode.
The control can now be altered by rotating the Pool Temperature Control Knob to a certain position and then
pressing the Lock/Reset button, then switching off . (See Fig. 9.0)
Example:
To change from Fahrenheit to Centigrade:
Turn Panel Switch OFF then back ON whilst pressing the Lock/Reset button.
Turn the Pool Temperature Control Knob until the display shows ‘F’.
Press the Lock/Reset button once and the display will show ‘C’.
Switch the Panel Switch OFF then back ON again.
The Control will now display in Centigrade.
Lock/Reset
Button
On / Off
Switch
Temperature
Display
Pool Temperature
Control Knob
Fig. 9.0
User Setup Mode Setting Factory Setting Alternative Display Indicator
1 Display units ° F = Fahrenheit ° C = Centigrade ° F or ° C
2 Maximum temperature 32 °C (90 °F) 41 °C ( 106 °F) PL or SPA
3 Software Version e.g 020
Pressure
Gauge