gledhill Stainless Lite Direct 90-300 litres User guide

Design, Installation
& Servicing Instructions
Models
Stainless Lite Direct 90-300 litres
Stainless Lite Indirect 90-300 litres
Stainless Lite Solar Direct 180-300 litres
Stainless Lite Solar Indirect 180-300 litres
An unvented hot water storage unit complying
with the requirements of Building Regulations
Approved Document G3 and manufactured in
accordance with BS EN 12897,the specification
for the unvented water storage vessels.

Page 2
Section Page
DESIGN
Description 3
Technical Information 6
System Design 8
INSTALLATION
Installation 10
Commissioning 19
USER INSTRUCTIONS 20
SERVICING AND MAINTENANCE
Servicing and Maintenance 21
Fault Finding 22
Short Parts List 25
ADDENDIX
Addendix A 26
Addendix B 27
Service Record 28
Notes 29
Terms & Conditions 30
ISSUE 9:05-09
These instructions should be read in conjunction with the installation/servicing
instructions issued by the manufacturer of the heat source being used.
Any installation must be in accordance with the relevant requirements of the Gas
SafetyRegulations,BuildingRegulations,I.E.E.WiringRegulationsandtheWaterFitting
Regulations (England and Wales) or Water Byelaws (Scotland). It should be read in
accordance with the relevant recommendations of the following:
BS 6798;BS 5549;BS 5546;
BS 5440:1;BS 5440:2;CP 331:3
BS 6700:BS 5258 and BS 7593:1992
Stainless Lite is covered by Section G3 of the Building Regulations (England and
Wales)TechnicalStandardP3(Scotland)andBuildingRegulationP5(NorthernIreland.
Compliance can be achieved via a Competent Person Self Certification Scheme or
notificaton of installation to the Local Authority Building Control Department.
It must be installed by a competent person as defined by the relevant regulations.
Manufacturers notes must NOT be taken as over-riding statutory obligations.
This appliance is not intended for use by persons (including children) with reduced
physical,sensory or mental capabilities,or lack of experience and knowledge unless
they have been given supervision or instruction concerning use of the appliance by
a person responsible for their safety. Children should be supervised at all times to
ensure they do not play with the appliance.
This information is provided to assist generally in the selection of equipment.
Responsibilityforselectionandspecificationofourequipmentmusthoweverremainthat
ofour customerand anyexpertsor consultantsconcernedwith the installation(s).
PLEASE NOTE: THAT WE DO NOT THEREFORE ACCEPT ANY RESPONSIBILITY FOR
MATTERS OF DESIGN SELECTION OR SPECIFICATION, FOR THE EFFECTIVENESS
OF AN INSTALLATION OR SYSTEM CONTAINING ONE OF OUR PRODUCTS UNLESS
SPECIFICALLY REQUESTEDTO DO SO INWRITING.
AllgoodsaresoldsubjecttoourConditionsofSalewhicharesetoutattherearofthis
specification. IntheinterestofcontinuouslyimprovingtheStainlessLiterange,Gledhill
BuildingProductsLimitedreservetherighttomodifytheproductwithoutnotice,and
in these circumstances this booklet,which is accurate at the time of printing,should
be disregarded. An updated set of Instructions will be produced and supplied with
new appliances and will be made available for other appliances on request.
AKIWAPRODUCTAPPROVEDTOCOMPLYWITHALLRELEVANTPARTSOFTHEBUILDING
REGULATIONS AND WATER SUPPLY (WATER FITTINGS) REGULATIONS.
StainlessLiteISPRODUCEDUNDERANISO9001:2008QUALITYMANAGEMENTSYSTEM
APPROVED BY BSI.
Aspartoftheindustrywide“benchmark”initiativeallGledhillStainlessLiteappliancesnow
includeaBenchmarkInstallation,CommissioningandServiceRecordLogBook.Pleaseread
carefullyandcompleteallsectionsrelevanttotheapplianceinstallation. Carryingoutthe
workrequiredandcompletingtheLogBookwillsatisfytherequirementsoftheBuilding
RegulationsforcommissioningassetoutintheDomesticHeatingComplianceGuide.The
detailsoftheLogBookwillberequiredintheeventofanywarrantyworkbeingrequired.
There is also a section to be completed after each regular service visit. The completed
LogBookandtheseinstructionsshouldbeleft with the cylinder.

Page 3
DESCRIPTION
DESIGN
Maintenance
Modifications should not be made to this
product. Replacement parts, including
immersion heaters,should be purchased from
Gledhill Building Products Limited, or agents
approvedbythem.Unventedhotwaterstorage
vessels need regular routine checks,and these
aredetailedbelow. Itisforthisreasonthatthis
manual must always be left with the Stainless
Lite.
It is essential that these checks be carried out
atthetimeofboilermaintenancebyaqualified
installer:
1. Manually open the relief valves in turn,and
check that water is discharged from the
valves and runs freely through the tundish
and out at the discharge point. Ensure that
the valves re-seat satisfactorily. (Note - the
water may be very hot).
2. It is important to check that the discharge
pipework is carrying the water away
adequately. Check for blockages etc. if it is
not.
3. Turn the mains water off and remove and
clean the strainer element in the Pressure
ReducingValve.
4. Checkthechargepressureintheexpansion
vessel and repressurise if required
5. Re-fill the system and ensure that all relief
valves have re-seated.
6. The Benchmark log book supplied should
be updated at each service.
7. Check the water pressure downstream of
the combination valve is 2.25 bar in static
condition.
8. Check and if necessary, descale the heat
exchanger in hard water areas ie. above
200ppm (mg/l).
Note:
Thecylinderisfactoryfittedwithatemperature
&pressurereliefvalvethatmustnotbeusedfor
any other purpose or removed.
The cylinder is factory fitted with immersion
heaters with thermal cut outs. Immersions
without thermal cut outs must not be fitted.
Manufacturer: GledhillBuildingProductsLtd
Maximum inlet pressure to
Pressure ReducingValve 12 bar
Operating pressure (PRV setting) 2.2 bar
Expansion ReliefValve setting 4.5 bar
Maximum primary working pressure 3.5 bar
Opening pressure ofT & P Relief Valve 6 bar
Opening temperature ofT & P ReliefValve 95°C
Energy cut-out thermostat setting 80°C
Immersion heater: Rating:3kW,240V AC
All cylinders are manufactured in accordance with the requirements of BS EN 12897
Thetundishmust bepositioned so that it isvisible totheoccupant and is awayfrom
electrical devices.
Components supplied with Stainless Lite:
• Cold water inlet combination valve
• Expansion relief/PRV combination valve
• Temperature and pressure relief valve
• Control thermostat
• Energy cut-out thermostat
• Energy cut-out motorised valve (indirects only)
• Tundish
• 3Kw Immersion heater
• Expansion vessel/mounting bracket/flexible hose
• Technical/user product literature
(Note:Two immersion heaters are supplied with the direct Stainless Lite)
Inanysituationwherethevolumeofheatedpipework(eg.secondarycirculation
pipes or manifold pipework for multiple units) exceeds 10 litres, then an
additionalexpansionvesselmustbefittedtoaccommodatetheextraexpansion
volume.
Handling Before Installation
StainlessLitemustbehandledwithcareandstoredthecorrectwayupinadryplace.
Anymanualhandling/liftingoperationswillneedtocomplywiththerequirementsof
the Manual Handling Operations Regulations issued by the H.S.E.The appliance can
bemovedusing a sack truckon the rearface although careshould be taken andthe
route should be even.Inapartment buildingscontaining anumber ofstoreys we would
recommendthattheappliancesaremovedverticallyin amechanicallift.If it is proposed
touseacrane,expertadviceshouldbeobtainedregardingtheneedforslings,lifting
beams etc.
A specific manual handling assessment is shown in Appendix B at the rear of this
manual.

Page 4
DESIGN
DESCRIPTION
Stainless Lite is a range of unvented hot water
storage cylinders, manufactured in the latest
high quality duplex stainless steel. They are
designedto provide mains pressure hot water
andaresupplied asa package whichcomplies
with Section G3 of the Building Regulations.
Theapplianceisextremelywellinsulatedusing
highdensityHCFCfreefoaminsulationwithan
ozone depleting potential (ODP) of zero and a
globalwarmingpotential(GWP)of1. Itisfitted
with all necessary safety devices and supplied
with all the necessary control devices to make
installation on site as easy as possible.
Stainless Lite is available in four basic
variants:
1. Stainless Lite Direct - For providing hot
water heated by electricity (Figure 1).
2. Stainless Lite Indirect - For use with gas
oroil boilers (Figure2). Unventedcylinders
must not be used with solid fuel boilers or
steam as the energy source.
3. Stainless Lite Direct Solar - For providing
hot water by solar gains and electricity.
(Figure 3).
4. StainlessLiteIndirectSolar -Forproviding
hotwaterbysolargainsandgasoroilboilers
(Figure 4). Unvented cylinders must not be
used with solid fuel boilers or steam as the
energy source.
Stainless Lite Direct
Stainless Lite direct is an electrically heated,
unventedhotwaterstoragecylinderdesigned
primarily for use with off peak electrical
supplies.
It is supplied fitted with two 3kW immersion
heaterswhich are BEABapprovedfor safetyas
recommended by the Electricity Council.
Stainless Lite direct models are listed in
Table 1 on Page 6 & 7.
Stainless Lite Indirect
Stainless Lite indirect is an unvented hot
water storage cylinder and is provided with a
high efficiency internal primary coil which is
designed for use with a gas or oil boiler and
is suitable for both open vented and sealed
pumped primary systems.
When used with a sealed heating system the
boilermustincorporateitsownenergycut-out
overheat thermostat.
Stainless Lite indirect models are listed in
Table 1 on Page 6 & 7.
Stainless Lite
DIRECT Stainless Lite INDIRECT
Figure 1 Figure 2
Pipework is not supplied by manufacturer,
but to be supplied and fitted by installer.

Page 5
DESCRIPTION
DESIGN
Stainless Lite
DIRECT SOLAR Stainless Lite INDIRECT SOLAR
Figure 3 Figure 4
Pipework is not supplied by manufacturer,
but to be supplied and fitted by installer.
Stainless Lite Direct Solar
Stainless Lite direct is an electrically heated,
unventedhot water storagecylinder designed
primarily for use with off peak electrical
supplies.
It is supplied fitted with two 3kW immersion
heaters which are BEAB approved for safety as
recommended by the Electricity Council.
Ahighefficiencycoil is positionedin thelower
part of the Stainless Lite vessel to ensure
maximum benefit of solar gain energy.
Stainless Lite direct models are listed in
Table 1 on Page 6 & 7.
Stainless Lite Indirect Solar
Stainless Lite indirect is an unvented hot
water storage cylinder and is provided with a
high efficiency internal primary coil which is
designed for use with a gas or oil boiler and
is suitable for both open vented and sealed
pumped primary systems.
When used with a sealed heating system the
boilermustincorporateitsownenergycut-out
overheat thermostat.
Ahighefficiencysecondsolarcoilispositioned
below the primary coil to ensure maximum
benefit of solar gain energy.
Stainless Lite indirect models are listed in
Table 1 on Page 6 & 7.
Note:
The cold supply elbow c/w drain tapping
must be fitted as shown in figs 1,2,3 and 4.
Aflexiblehosecanthenbeconnectedtothe
drain tapping and,providing the hose runs
below the lowest level of the cylinder,then
allthewatercontentscanbedrainedoutby
syphonic action.

Page 6
DESIGN
TECHNICAL INFORMATION
Table 1
Model
Weight - Empty
Weight - Full
Capacity (Total Volume)
Pressure Regulator 2.25bar inlet
group c/w balance cold supply,
expansion vessel connection and
expansion valve set at 4.5 bar
ExpansionVessel size.
Pre-charged to 2.25bar
Overall Height
Overall Diameter
Pressure &Temperature
ReliefValve 6bar 90°C
22mm Secondary
ReturnTapping
On Peak 1¾”Incalloy
Immersion 3kW
Cold Feed 22mm
Compression Connection
Lower 1¾”Incalloy
Immersion 3kW
Volume of On PeakWater
Heated
Dual Control & Overheat Stat
kg kg Litres bar Litres A=mm mm B=mm C=mm D=mm E=mm F=mm Litres G=mm
Direct
D90 13 103 90 2.25 12 732 550 490 n/a n/a 367 223 n/a n/a
D120 18 138 120 2.25 12 920 550 678 n/a 487 367 223 55 n/a
D150 22 172 150 2.25 18 1107 550 865 n/a 587 442 223 70 n/a
D180 24 204 180 2.25 18 1295 550 1053 n/a 686 442 223 85 n/a
D210 28 238 210 2.25 24 1483 550 1241 1127 786 442 223 90 n/a
D250 32 282 250 2.25 24 1733 550 1491 1377 927 522 223 125 n/a
D300 37 337 300 2.25 35 2020 550 1777 1577 1077 522 223 155 n/a
Indirect
IND90 19 109 90 2.25 12 732 550 490 n/a n/a 367 352 n/a 367
IND120 22 142 120 2.25 12 920 550 678 n/a n/a 367 352 n/a 367
IND150 26 176 150 2.25 18 1107 550 865 n/a n/a 442 392 n/a 407
IND180 28 208 180 2.25 18 1295 550 1053 n/a n/a 442 432 n/a 447
IND210 33 243 210 2.25 24 1483 550 1241 1127 n/a 442 432 n/a 482
IND250 38 278 250 2.25 24 1733 550 1491 1377 927 522 512 125 577
IND300 44 344 300 2.25 35 2020 550 1777 1577 1077 522 512 155 677
Solar Direct
SOL180d 26 206 180 2.25 18 1295 550 1053 n/a 746 437 482 75 n/a
SOL210d 30 240 210 2.25 24 1483 550 1241 1127 908 437 544 80 n/a
SOL250d 34 284 250 2.25 24 1733 550 1491 1377 1092 522 629 100 n/a
SOL300d 39 339 300 2.25 35 2020 550 1777 1577 1287 522 724 115 n/a
Solar Indirect
SOL180i 30 210 180 2.25 18 1295 550 1053 n/a n/a 437 717 80 732
SOL210i 35 245 210 2.25 24 1483 550 1241 1127 n/a 437 822 95 837
SOL250i 40 290 250 2.25 24 1733 550 1491 1377 n/a 522 947 115 962
SOL300i 46 346 300 2.25 35 2020 550 1777 1577 n/a 522 1042 140 1092
A
C
Direct
D
F
E
B
A
Solar Direct
C
N
M
L
P
E
K
B
D
F
A
C
Indirect
D
H
F
E
I
J
B
G

Page 7
TECHNICAL INFORMATION
DESIGN
Extra Stat Pocket
For Boiler Use If Required
22mm Primary Return
Compression Connection
22mm Primary Flow
Compression Connection
22mm Solar Return
Compression Connection
22mm Solar Flow
Compression Connection
Dual Control/Overheat Stat
& Solar Control
Thermostat Pocket
Solar Pocket Solar Pocket
kW Rating of Primary Coil
Surface Area of
Primary Heater Coil
Pressure Loss Across
Primary Heater Coil
Surface Area of
Solar Heater Coil
Pressure Loss Across Solar
Heater Coil
Heat UpTime from 15°C to 60°C
(applies to Primary Heat Source only)
RecoveryTime after 70% Draw Off
(applies to Primary Heat Source only)
Standing Losses kWhr/24hr
Dedicated SolarVolume
H=mm I=mm J=mm K=mm L=mm M=mm N=mm P=mm kW m2bar m2bar min min kWh Litres
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 90 58 0.80 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 119 90 1.00 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 150 121 1.20 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 179 157 1.40 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 209 192 1.60 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 249 224 1.75 n/a
n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 299 263 1.93 n/a
367 223 312 n/a n/a n/a n/a n/a 16.5 0.59 0.165 n/a n/a 21 16 0.80 n/a
367 223 312 n/a n/a n/a n/a n/a 18 0.59 0.165 n/a n/a 27 19 1.00 n/a
407 223 352 n/a n/a n/a n/a n/a 18.5 0.68 0.191 n/a n/a 28 19 1.20 n/a
447 223 392 n/a n/a n/a n/a n/a 19 0.78 0.216 n/a n/a 33 21 1.40 n/a
482 223 392 n/a n/a n/a n/a n/a 20.5 0.78 0.216 n/a n/a 41 26 1.60 n/a
577 223 472 n/a n/a n/a n/a n/a 21.5 0.97 0.241 n/a n/a 44 30 1.75 n/a
677 223 472 n/a n/a n/a n/a n/a 25 0.97 0.241 n/a n/a 48 32 1.93 n/a
n/a n/a n/a 223 352 419 882 203 n/a n/a n/a 0.680 0.191 n/a 90 1.40 60
n/a n/a n/a 223 352 419 1000 203 n/a n/a n/a 0.680 0.191 n/a 115 1.60 70
n/a n/a n/a 223 472 539 1180 262 n/a n/a n/a 0.968 0.241 n/a 139 1.75 84
n/a n/a n/a 223 472 539 1367 262 n/a n/a n/a 0.968 0.241 n/a 187 1.93 100
n/a 457 677 223 352 419 882 203 18 0.59 0.165 0.680 0.191 28 16 1.40 60
n/a 522 782 223 352 419 1000 203 18.5 0.68 0.191 0.680 0.191 35 16 1.60 70
n/a 607 907 223 472 539 1180 262 19 0.78 0.216 0.968 0.241 38 19 1.75 84
n/a 702 1002 223 472 539 1367 262 20.5 0.78 0.216 0.968 0.241 41 20 1.93 100
F
Solar Indirect
N
G
P
I
E
K
J
A
B
M
L
C
4
0
,0
0
º
4
5
,
00º
3
5
,00º
2
5,
0
0
º
1
5
,
0
0
º
NOTES
1. Not all models - see table 1.
2. Recovery times based on Primary
Coil/I.H.duty(ie.assumestheboiler
output is adequate).
3. All connections are supplied with
compression fittings for direct
connection to copper pipework.

Page 8
INSTALLATION
INSTALLATION
Stainless Lite Direct
Basic Appliance
1. Hot water draw off (22mm) compression
2. Temperature&pressurereliefvalve90°/6bar
3. Hotwater secondary return22mm capped
(not fitted to smaller sizes,see table 1)
4. Immersion heater 1¾”BSP 3kW
(normally on-peak)
5. 22mm cold supply compression
6. Immersion heater 1¾”BSP 3kW
(normally off-peak)
Component kit supplied separately
A. Combination inlet group incorporating
pressure reducing valve, strainer, check
valve,balancecoldtakeoffpoint,expansion
reliefvalveandexpansionvesselconnection
points.
B. Portableexpansionvesselsc/wflexiblehose
and wall bracket
C. Tundish
Stainless Lite Indirect
Basic Appliance
1. Hot water draw off (22mm) compression
2. Temperature&pressurereliefvalve90°/6bar
3. Hotwater secondary return22mm capped
(not fitted to smaller sizes,see table 1)
4. Immersion heater 1¾”BSP 3kW
5. 22mm cold supply compression
6. Immersion heater 1¾”BSP 3kW
7. Dual control/overheat stat pocket (22mm)
8. Boiler control sensor pocket (spare)
9. Primary return (22mm)
10. Primary flow (22mm))
Component kit supplied separately
A. Combination inlet group incorporating
pressure reducing valve, strainer, check
valve,balancecoldtakeoffpoint,expansion
reliefvalveandexpansionvesselconnection
points.
B. Potableexpansionvesselsc/wflexiblehose
and wall bracket
C. Tundish
D. Dual control thermostat and combined
overheat thermostat
E. Two port (22mm) zone valve for
primary circuit
F. Wiring junction box for primary system
1
2
5
3
4
6
1
2
3
4
7
5
6
9
8
10
Typical arrangement of component kit shown fitted to the appliance for clarity
Pipework to be supplied and fitted by installer.

Page 9
INSTALLATION
INSTALLATION
7
9
3
11
6
12
12
1
2
8
4
5
10
Stainless Lite Direct Solar
Basic Appliance
1. Hot water draw off (22mm) compression
2. Temperature&pressurereliefvalve90°/6bar
3. Hotwatersecondaryreturn22mmcapped
(not fitted to smaller sizes,see table 1)
4. Immersion heater 1¾”BSP 3kW
(normally on-peak)
5. 22mm cold supply
6. Immersion heater 1¾”BSP 3kW
(normally off-peak)
7. Dual control/Overheat stat & solar
thermostat pocket
8. Solar coil return to panel collector (22mm)
compression
9. Solarcoil flowfrompanel (22mm) compression
10. Solar thermostat pocket
Component kit supplied separately
A. Combinationinletgroupincorporatingpressure
reducing valve, strainer, check valve, balance
cold take off point,expansion relief valve and
expansion vessel connection points.
B. Portableexpansionvesselsc/wflexiblehose
and wall bracket
C. Tundish
D. Dual control thermostat and combined
overheat thermostat
Stainless Lite Indirect Solar
Basic Appliance
1. Hot water draw off (22mm) compression
2. Temperature&pressurereliefvalve90°/6bar
3. Hotwatersecondaryreturn22mmcapped
(not fitted to smaller sizes,see table 1)
4. Immersion heater 1¾”BSP 3kW
5. 22mm cold supply
6. Thermostat pocket (22mm)
7. Primary return (22mm)
8. Primary flow (22mm)
9. Dual control/Overheat stat & solar
thermostat pocket
10. Solar coil return to panel collector (22mm)
compression
11. Solarcoil flowfrompanel (22mm) compression
12. Solar thermostat pocket
Component kit supplied separately
A. Combinationinletgroupincorporatingpressure
reducing valve, strainer, check valve, balance
cold take off point,expansion relief valve and
expansion vessel connection points.
B. Potableexpansionvesselsc/wflexiblehose
and wall bracket
C. Tundish
D. Dual control thermostat and combined
overheat thermostat (x2)
E. Two port (22mm) zone valve for
primary circuit
F. Wiring junction box for primary system
1
2
5
8
7
6
4
3
9
10
10
Typical arrangement of component kit shown fitted to the appliance for clarity
Pipework to be supplied and fitted by installer.

Page 10
INSTALLATION
INSTALLATION
General Design Considerations
The cupboard footprint needs to be at least
650mm square.
The base chosen for the cylinder should be level
and capable of supporting the weight of the unit
when full of water as shown in General Data. The
dischargepipeworkforthesafetyvalvesmusthave
a minimum fall of 1 : 200 from the unit to a safe
discharge point. All exposed pipework should be
insulated and the unit should NOT be fixed in a
locationwherethecontentscouldfreeze.
The pipe connecting the boiler flow to the
appliancemustnotbelessthan22mmcopper
or equivalent.
MainsWater Supply
Existing properties with a 15mm supply will be
satisfactory provided the local mains pressure
is good, but should be confined to single
bathroomproperties. Fornewpropertieswhere
simultaneous demand is required to more than
one bathroom or a bathroom and one or more
en-suites,the communication and service pipe
intothedwellingshouldbeaminimumof22mm
(usually in the form of a 25mm MDPE supply).
The minimum recommended static pressure
to operate a Stainless Lite domestic system is 3
bar. There should be a flow of at least 30 litres
perminuteoraboveavailableintotheproperty.
Normally Stainless Lite provides well in excess
of 40 litres/min in most conditions. Flow rates
for ALL mains pressure systems are subject
to district pressures and system dynamic loss.
Particularly on larger properties with more
than one bathroom, the pipe sizes should be
calculated in accordance with BS6700.
Model Selection
The suggested Direct model sizes, shown
opposite,are based on a typical days hot water
use assuming an Economy 7 tariff is provided.
A reduction of one model size can normally be
made with an Economy 10 tariff.
When using the Direct models for high
specification developments an increase of one
model size should be considered.
Where selecting a solar model, it is important to
check the dedicated solar volume (shown in table
1 on page 7) is suitable for the total floor area of
the dwelling to ensure compliance with Building
Regulations.Themaximumfloorareaofthedwelling
permittedforthemodelsisshownopposite.
The suggested model sizes are based on
typical hot water usage. For high specification
dwellings an increase of one model size should
beconsidered.
I.V.
Combination Valve
I.V.
Model Selection Guide
Max hot water demand Max number of bed spaces
(Bedrooms)
Indirect
litres Direct litres
1 shower room Bedsit (0) 90 120
1 bathroom 2 (2) 120 150
1 bathroom 4 (3) 120 180
1 bathroom + separate shower room 6 (4) 150 210
1 bathroom + 2 separate shower rooms
or 2 bathrooms 7 (5) 180 210
2 bathrooms + separate shower room 7 (5) 210 250
2 bathrooms + 2 separate shower rooms 7 (5) 250 300
3 bathrooms + 2 separate showers rooms 9 (6) 300 -
IftwoStainlessLitesare coupledtogetherthesecondaryinletand outlet pipesmust
be balanced.The units must be fitted on the same level.
Note:No valves must be fitted between the expansion vessel and the storage cylinder(s).
Solar Model Selection Guide
Max hot water demand Max floor
area (m2)Bedrooms Indirect
litres Direct litres
1 shower room 44 Bedsit - 180
1 bathroom 44 1-3 180 -
1 bathroom 66 1-3 210
1 bathroom + 1 shower room 66 1-3 210 -
1 bathroom + 1 shower room 84 1-3 - 250
1 bathroom + 2 shower rooms 84 2-4 250 -
1 bathroom + 2 shower rooms 113 2-4 - 300
2 bathrooms + 1 shower room 113 3-4 300 -