gledhill Torrent GreenHeat TGH140-OV, Torrent GreenHeat TGH350-OV, TorrentGreenHeat TGH140-SP, Torrent GreenHeat TGH170-SP, Torrent GreenHeat TGH210-SP Installation & Servicing Instructions Manual
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Design, Installation & Servicing Instructions
Models covered in this manual
Torrent ECO OV TEC140-TEC350
Torrent ECO SP TEC140-TEC350
Torrent ECO SOL TEC210-TEC450
Torrent ECO HP TEC170-TEC450
Torrent ECO HPSOL TEC210-TEC450
Torrent ECO
Open vented thermal store providing heating and mains pressure hot water
Page 2
Section Page
DESIGN
Description 3
Technical Information 6
System Design 10
INSTALLATION
Installation 14
Wiring Diagrams 27
Commissioning 38
Installation Review 40
SERVICING AND MAINTENANCE
Servicing and Maintenance 41
Fault Finding 42
Short Parts List 48
APPENDIX
Appendix A 49
Appendix B 50
Notes 51
Terms & Conditions 52
BENCHMARK
Commissioning Check List 54
Service Record 55
ISSUE 2: SEPTEMBER 2015
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
Safety Regulations, Building Regulations, I.E.E. Wiring Regulations and the Water
Fitting 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: 1993 and BS7671
It must be installed by a competent person as dened by the relevant regulations.
Manufacturers notes must NOT be taken as over-riding statutory obligations.
This product overcomes Part G Building Regulation discharge requirements for
unvented cylinders but the installation is notiable to building control unless it is
carried out under an approved competent person self-certication scheme.
Although the secondary supply (domestic) is at mains pressure, it is not necessary to
t an expansion chamber, pressure or temperature relief valve, the plumbing should
allow any unusual build up of pressure to be relieved at the ball valve.
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.
Responsibility for selection and specication of our equipment must however remain
that of our customer and any experts or consultants concerned with 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 REQUESTED TO DO SO IN WRITING.
All goods are sold subject to our Conditions of Sale which are set out at the rear of this
specication. In the interest of continuously improving the Torrent range, Gledhill
Building Products Limited reserve the right to modify the product without notice, 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.
Benchmark places responsibilities on both manufacturers and installers. The
purpose is to ensure that customers are provided with the correct equipment for
their needs, that it is installed, commissioned and serviced in accordance with the
manufacturers instructions by competent persons and that it meets the requirements
of the appropriate Building Regulations. The Benchmark Checklist can be used to
demonstrate compliance with Building Regulations and should be provided to the
customer for future reference.
Installers are required to carry out installation, commissioning and servicing work
in accordance with the Benchmark Code of Practice which is available from the
Heating and Hot Water Industry Council who manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.
For information on the HWA Charter Statement, go to the HWA website hotwater.org.uk.
Page 3
Manufacturer: Gledhill Building Products Ltd
Max. mains inlet water pressure 5.0bar
Max. working pressure - Primary heat exchanger (Indirect models) 3.0bar
Max. working pressure - Solar heat exchanger (Solar models) 6.0bar
Max. working pressure - Open vented thermal store (All models) 10.0m (1.0bar)
Max. working pressure - Open vented central heating system 10.0m (1.0bar)
Max. working pressure - Sealed heating system 3.0bar
Max. ow rate - Measured by ow sensor 50 l/min
Min. ow rate - Measured by ow sensor 3.5 l/min
Immersion heater rating
3kW @ 230V ac, 50Hz
The Torrent comes complete with plate heat exchanger. This has a very small
volume of water held within it, therefore any minimal expansion will be
accomodated in the supply pipe.
Handling Before Installation
The Torrent must be handled with care and stored the correct way up in a dry place.
Any manual handling/lifting operations will need to comply with the requirements
of the Manual Handling Operations Regulations issued by the H.S.E. The appliance
can be moved using a sack truck on the rear face although care should be taken and
the route should be even. In apartment buildings containing a number of storeys we
would recommend that the appliances are moved vertically in a mechanical lift. If it
is proposed to use a crane, expert advice should be obtained regarding the need for
slings, lifting beams etc. A specic manual handling assessment is shown in Appendix
B at the rear of this manual.
Maintenance
Modications should not be made to this product. Replacement parts, including
immersion heaters, should be purchased from Gledhill Building Products Limited, or
agents approved by them. The manual must always be left with the Torrent.
The Environment
This product has been manufactured using many recyclable materials, including the
approved HCFC/CFC free polyurethane foam insulation. At the end of its useful life, it
should be disposed of at a Local Authority Recycling Centre, to maximise the products
full environmental benets.
Note:
The thermal store is supplied with Immersion heaters. These incorporate a thermostat
(XB114) which cuts the electricity supply to the immersion heater if the control
thermostat fails - a thermal cut out. Under no circumstances t an immersion heater
which does not incorporate a thermal cut out. If the thermal cut out operates the
thermostat (XB114) is no longer eective and must be replaced.
DESIGN
DESCRIPTION
Page 4
DESIGN
DESCRIPTION
g) Less controls – The thermal store is open
vented and therefore does not require
additional safety devices such as temperature
and pressure relief valves or an inlet control
group and expansion vessels.
h) Building Regulation – The thermal store,
being open vented, does not require
Building control to be notied to comply
with section G3 of the building regulations,
unlike an unvented cylinder which does.
i) Annual inspection – The running costs of this
cylinder are greatly reduced by not being
required to have an annual safety inspection
where as an unvented cylinder does.
The Torrent provides high performance mains
pressure hot water without the additional costs
incurred with an unvented cylinder.
The Torrent ECO is available in the following
basic variants:-
Torrent ECO OV
The Torrent ECO OV utilises an open vented
boiler and / or direct electric immersion
heaters as its primary energy source. It is
available with tappings for a woodburning
or solid fuel boiler, but if any of the standard
tapping are not required, they can be removed
at the time of order.
One of the benets of the open vented boiler
conguration is that the whole output of the
boiler is available to the thermal store, unlike
the indirect Sealed Primary (SP) version where
the output from the boiler is limited by the heat
exchanger. This will provide an improvement in
the operational eciency of the boiler, reducing
the primary energy usage and running costs.
The Torrent ECO OV provides highperformance mains pressure hot water. The
heat energy provided from the primary heat
source and / or solid fuel input is circulated
from the store to the central heating circuit,
allowing rapid heat-up of a radiator system.
In situations where no gas or solid fuel source
is available the Torrent ECO OV can be used
exclusively from the two 3kW electric immersion
elements which will provide both hot water and
auxiliary heating for the property. The obvious
application is apartments where no gas main
is available but this could also be appropriate
where electricity is available from a renewable or
low carbon source.
If connected to the standard grid then the
thermal store is the perfect solution to maximise
usage of an o peak tari where arrangements
Gledhill developed the principal of domestic thermal stores starting in 1982 and
they have been manufacturing them since then.
Their importance to plumbing systems is described below.
a) Why use a thermal store - Alternative energy fuel sources are typically low grade,
inherently unpredictable and are often available in plentiful supply but not when
the heat energy is needed! A thermal store provides the means to harness the
energy when it is available for later conversion into both hot water AND heating.
Being open vented, they provide a simple and inherently safe way to produce high-
performance mains pressure hot water. So the householder can enjoy the comfort
and luxury of a mains pressure system produced from alternative energy sources.
The alternative energy feeds into the thermal store which is also the water that
circulates around the heating system. This means that the energy available from
solar panels or a wood burning stove, for example, can be used to provide energy
into the heating circuit to decrease the use of fossil fuel based boilers, and hence
reduce household running costs.
It is very problematic and inherently unsafe to connect wood burning stoves or
other uncontrolled heat sources to an unvented cylinder, and not easily possible
to combine alternative energy heat sources to provide energy to the heating
circuit, hence the unique advantages of a thermal store.
b) The heart of an alternative energy system - The Torrent ECO is the ideal product
to use as the heart of an alternative energy system as it will take energy input not
only from a conventional boiler but also from a wide variety of alternative energy
sources, including but not limited to:
• solar panels
• wood burning stoves and other uncontrolled heat sources
• ground or air source heat pumps
• electricity from renewable or low carbon sources
If the system is congured appropriately the heat from the alternative energy
source will be available for both hot water AND heating. This is only possible with
a thermal store such as the Torrent and is not possible with an unvented cylinder
where you will only get an alternative energy contribution to the hot water.
c) In-built upgrade potential - You are able to specify from the required tappings,
with any future requirements, for example, a wood burning stove or solar panels
can be added as an upgrade to the property at a later stage and the hot water
cylinder will be ready to work with it.
d) Neutral Point - The Torrent ECO becomes the neutral point in any open vented
system because the open vent and cold feed pipes are connected to it. The benet
of this is that another device to enable dierent systems to be joined together at a
neutral point is not required, which would be required in other systems. In multiple
fuel systems, the Torrent acts as a low loss header.
e) Apartments – The Torrent open vented thermal store does not need a discharge pipe
from a pressure and temperature relief valve, unlike an unvented cylinder which does.
This combined with the fact that discharges are not permitted into PVCu soil stacks
makes the installation of un-vented stores in apartments dicult and expensive.
f) Legionella Risk – Alternative energy supplies cannot be relied upon to raise the
temperature of the stored water above 60 degrees every time they operate. This
is not a problem with a thermal store because the store water is not the water that
comes out of the tap. The water that comes out the hot tap is mains cold water
run through a plate heat exchanger on the outside of the thermal store. This water
heats very quickly and the volume of stagnent water in the heat exchanger is very
small so there is virtually no legionella risk.
Page 5
DESIGN
DESCRIPTION
should be made to power the lower immersion element in order to minimise the running
costs. It is important to note that the design heat loss, of the rooms to be heated, must
be less than the lowest immersion power. If the design heat loss is greater than this, the
heating will need to be supplemented by another heat source.
The Torrent ECO OV is designed to be heated directly (i.e. without internal heat
exchangers) by one or more of the following heat sources;
• Site tted electric immersion heaters e.g. to utilise o peak electricity
• A remote gas or oil boiler
• A solid fuel boiler or stove
Torrent ECO SP
The Torrent ECO SP utilises a sealed system boiler as its primary energy source. It is
available with optional tappings for a woodburning or solid fuel boiler. If any of the
standard tapping are not required, they can be removed at the time of order. The
Torrent ECO SP provides high-performance mains pressure hot water.
Where a sealed primary coil is used, the thermal store is a hot water only thermal store. If
too much heat is taken out of the store, then hot water performance will be limited. The hot
water priority should be protected by use of an appropriate thermostat. The central heating
circuit is normally supplied directly from the boiler although an auxiliary heating circuit
can be connected from the store in which case the solid fuel source will provide energy
to the auxiliary heating circuit. Obviously, the energy output that can be provided by the
auxiliary heating circuit will be limited to the energy input from the solid fuel appliance.
This sealed primary (SP) model permits the use of a smaller feed and expansion tank
because the main central heating circuit does not need to be catered for. This can
make positioning the F&E tank more straightforward.
An immersion boss is provided for a site tted immersion heater, and it is normally
envisaged that this will be used as an emergency electric back-up for hot water and
to provide emergency energy to the auxiliary heating circuit.
The Torrent ECO SP is designed to be heated by one or more of the following heat
sources;
• Directly by an electric immersion heater as a backup heat source only
• Indirectly (i.e. via a heat exchanger) by a remote gas or oil boiler
• Directly by a solid fuel boiler or stove
Torrent ECO SOL
The Torrent ECO SOL utilises either a sealed system boiler and / or an open vented
boiler as its primary energy source. It also has a high-eciency solar coil to allow the
homeowner to benet from a wide variety of alternative energy inputs. It is available
with optional tappings for a woodburning or solid fuel boiler. If any of the standard
tapping are not required, they can be removed at the time of order.
The Torrent ECO SOL provides high-performance mains pressure hot water.The
central heating circuit can be supplied directly from a sealed system boiler although
an auxiliary heating circuit can be connected from the store in which case both the
solar and solid fuel energy will also provide an input to the auxiliary heating circuit.
Alternatively, an open vented boiler can be used to directly heat the store so that
the energy will be available for both hot water and auxiliary central heating circuit.
The cylinder comes with two return connections for solid fuel and woodburning
stoves to enable the homeowner to have an aga running 24 hours a day but still
retaining the dedicated solar volume.
An immersion boss is provided for a site tted immersion heater, and it is normally
envisaged that this will be used as an emergency electric back-up for hot water and
to provide emergency energy to the auxiliary heating circuit.
The Torrent ECO SOL is designed to be heated
by one or more of the following heat sources;
• Directly by an electric immersion heater as
a backup heat source only
• Either indirectly or directly by a remote gas
or oil boiler
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
Torrent ECO HP Models
The Torrent ECO HP and HP SOL are directly
heated, open vented thermal stores designed
for use with an air source or a ground source
heat pump. It is available with optional tappings
for a woodburning or solid fuel boiler. If any of
the standard tapping are not required, they can
be removed at the time of order.
Although the thermal store is open vented,
the mains pressure hot water is heated
instantaneously via the plate heat exchanger.
The Torrent ECO HP range of primary thermal
stores are only suitable for open vented heating
systems but they provide mains pressure hot
water without the requirements of a pressure
and temperature relief valve.
An immersion boss is provided for a site tted
immersion heater, and it is normally envisaged
that this will be used as an emergency
electric back-up for hot water and to provide
emergency energy to the auxiliary heating
circuit.
The suggested model sizes are based on typical
hot water usage and the store charged to about
75°C. If the store charge temperature is going
to be lower, then a larger model should be
considered. This is especially important where
the heat pump alone is unable to charge the
store to 75°C as is likely to be the case with a
heat pump. If the immersion element is used
to raise the temperature of the store, then
a suitable control system should be used
to ensure the immersion element does not
operate until the heat pump has raised the store
to the maximum temperature, or the overall
eciency of the system will be reduced.
The Torrent ECO HP and HP SOL are designed
to be heated by one or more of the following
heat sources;
• Directly by a ground source or air source heat
pump
• Directly by an electric immersion heater as
a backup heat source only
• Directly by a solid fuel boiler or stove
• Indirectly by solar thermal system
Page 6
Technical
Model
Energy Eciency Class
Heat Loss
Domestic Hot Water Volume
Weight - Empty
Weight - Full
Overall Height
(Excluding F&E Tank)
Overall Diameter
(Allow additional 150mm for PHE, see page 14)
Domestic Hot Water
From Plate Heat Exchanger
Solar Sensor
Store Overheat
Domestic Hot Water
Store Sensor
Solid Fuel Flow
Open Vented Boiler Flow
Central Heating Flow
On Peak
Backup Immersion Heater
Sealed Primary Boiler Flow
Control Stat
Sealed Primary Boiler Return
Solid Fuel Return
(Solar Model Only)
watts litres kg kg
A
mm
mm
B
mmCmmDmmEmmFmmGmmHmmImmJmmKmmLmmMmm
Torrent
ECO OV
TEC140-OV C 66 140 37 171 1219 535 490 n/a 1040 1040 545 545 505 570 n/a 395
n/a n/a 135 90 95 155 n/a 95 95 185 n/a n/a 195 1040 1129 n/a n/a 134 n/a 35
TEC170-OV C 74 170 39 202 1449 535 720 n/a 1270 1270 670 670 630 685 n/a 470
n/a n/a 135 90 95 385 n/a 95 95 185 n/a n/a 195 1270 1359 n/a n/a 163 n/a 35
TEC210-OV C 84 210 41 242 1414 585 680 n/a 1235 1235 685 685 645 690 n/a 455
n/a n/a 135 90 95 345 n/a 95 95 185 n/a n/a 195 1235 1324 n/a n/a 201 n/a 35
TEC250-OV D 93 250 43 282 1654 585 925 n/a 1475 1475 785 785 745 790 n/a 540
n/a n/a 135 90 95 590 n/a 95 95 185 n/a n/a 195 1475 1564 n/a n/a 239 n/a 35
TEC350-OV D 114 350 53 388 1874 636 1140 n/a 1690 1690 890 890 850 895 n/a 615
n/a n/a 140 95 100 805 n/a 100 100 190 n/a n/a 200 1690 1784 n/a n/a 334 n/a 35
Torrent
ECO SP
TEC140-SP C 66 140 42 176 1219 535 490 n/a 1040 1040 545 n/a 505 495 322 395
145 n/a 135 90 n/a 155 n/a 95 95 n/a n/a n/a 195 1040 1129 1.38 n/a 134 n/a 35
TEC170-SP C 74 170 44 207 1449 535 720 n/a 1270 1270 690 n/a 650 570 322 470
145 n/a 135 90 n/a 385 n/a 95 95 n/a n/a n/a 195 1270 1359 1.38 n/a 163 n/a 35
TEC210-SP C 84 210 47 248 1414 585 680 n/a 1235 1235 685 n/a 645 555 412 455
145 n/a 125 90 n/a 345 n/a 95 95 n/a n/a n/a 195 1235 1324 1.84 n/a 201 n/a 35
TEC250-SP D 93 250 49 288 1654 585 925 n/a 1475 1475 785 n/a 745 640 432 540
165 n/a 125 90 n/a 590 n/a 95 95 n/a n/a n/a 195 1475 1564 1.84 n/a 239 n/a 35
TEC350-SP D 114 350 61 396 1874 636 1140 n/a 1690 1690 890 n/a 850 480 350 615
150 n/a 140 95 n/a 805 n/a 100 100 n/a n/a n/a 200 1690 1784 2.28 n/a 334 n/a 35
Torrent
ECO SOL
TEC210-SOL C 84 210 49 250 1414 585 680 920 1235 1235 845 845 805 455 702 705
525 95 475 90 435 345 190 95 435 n/a 355 125 195 1235 1324 1.84 0.27 201 62 35
TEC250-SOL D 93 250 51 290 1654 585 925 1085 1475 1475 1005 1005 965 545 872 830
605 95 545 90 505 590 220 95 505 n/a 410 125 195 1475 1564 1.84 0.34 239 73 35
TEC350-SOL D 114 350 63 398 1874 636 1140 1255 1690 1690 1010 1010 970 590 850 950
650 100 610 95 570 805 225 100 570 n/a 475 130 200 1690 1784 2.28 0.40 334 101 35
TEC450-SOL D 134 450 68 499 1764 738 935 1185 1490 1490 1060 1060 1020 640 895 900
695 270 640 40 590 600 310 390 590 n/a 360 260 370 1490 1674 2.28 0.54 431 130 35
DESIGN
TECHNICAL INFORMATION
Torrent ECO OV
G
H
K
U
Z
D
I
Q
B
F
X
A
E
Y
S
N
P
O
T
Torrent ECO SP
H
I
J
Z
D
F
K
B
X
A
E
Y
S
L
N
T
O
Q
Page 7
Sealed Primary Boiler Return
Solid Fuel Return
(Solar Model Only)
Central Heating Return
Drain
Open Vented Boiler return
Cold Mains To
Plate Heat Exchanger
Solar Sensor
Plate Heat Exchanger Return
Solid Fuel return
O Peak Immersion Heater
Solar Flow
Solar return
Cold Feed
Plate Heat Exchanger Flow
Open Vent
Surface Area of
Primary Heater Coil
Surface Area of
Solar Heater Coil
Capacity (Total Volume)
Dedicated Solar Volume
Maximum Hot Water Flow Rate
L
mmMmmNmmOmmPmmQmmRmmSmmTmmUmmVmmWmmXmmYmmZmm
m
2
m2litres litres
litres/
min
n/a n/a 135 90 95 155 n/a 95 95 185 n/a n/a 195 1040 1129 n/a n/a 134 n/a 35
n/a n/a 135 90 95 385 n/a 95 95 185 n/a n/a 195 1270 1359 n/a n/a 163 n/a 35
n/a n/a 135 90 95 345 n/a 95 95 185 n/a n/a 195 1235 1324 n/a n/a 201 n/a 35
n/a n/a 135 90 95 590 n/a 95 95 185 n/a n/a 195 1475 1564 n/a n/a 239 n/a 35
n/a n/a 140 95 100 805 n/a 100 100 190 n/a n/a 200 1690 1784 n/a n/a 334 n/a 35
145 n/a 135 90 n/a 155 n/a 95 95 n/a n/a n/a 195 1040 1129 1.38 n/a 134 n/a 35
145 n/a 135 90 n/a 385 n/a 95 95 n/a n/a n/a 195 1270 1359 1.38 n/a 163 n/a 35
145 n/a 125 90 n/a 345 n/a 95 95 n/a n/a n/a 195 1235 1324 1.84 n/a 201 n/a 35
165 n/a 125 90 n/a 590 n/a 95 95 n/a n/a n/a 195 1475 1564 1.84 n/a 239 n/a 35
150 n/a 140 95 n/a 805 n/a 100 100 n/a n/a n/a 200 1690 1784 2.28 n/a 334 n/a 35
525 95 475 90 435 345 190 95 435 n/a 355 125 195 1235 1324 1.84 0.27 201 62 35
605 95 545 90 505 590 220 95 505 n/a 410 125 195 1475 1564 1.84 0.34 239 73 35
650 100 610 95 570 805 225 100 570 n/a 475 130 200 1690 1784 2.28 0.40 334 101 35
695 270 640 40 590 600 310 390 590 n/a 360 260 370 1490 1674 2.28 0.54 431 130 35
DESIGN
TECHNICAL INFORMATION
K
Torrent ECO SOL
J
L
N
P
V
R
Z
D
G
H
M
B
Q
X
I
A
F
E
Y
C
S
W
T
O
NOTES
1. The diagrams shown are generic. For
exact product specification refer to
the table eg. the number of immersion
heaters varies depending on model.
2. The specifications shown are the
standard range, but these can be
changed at the time of order to suit
specic installation requirements.
3. All connections are within 145˚, but if
more detail is required, please contact
our technical desk on 01253 474584 or
your local Gledhill depot.
4. 24 plate PHE used on all models apart
from heat pump models.
Page 8
Technical
Model
Energy Eciency Class
Heat Loss
Domestic Hot Water Volume
Weight - Empty
Weight - Full
Overall Height
(Excluding F&E Tank)
Overall Diameter
(Allow additional 150mm for PHE, see page 14)
Domestic Hot Water
From Plate Heat Exchanger
Solar Sensor
Store Overheat
Domestic Hot Water
Store Sensor
Solid Fuel Flow
Central Heating Flow
Central Heating
Boost Immersion Heater
Second Central Heating
Boost Immersion Heater
Domestic Hot Water
Backup Immersion Heater
Second Domestic Hot Water
Backup Immersion Heater
Control Stat
Solid Fuel Return
(Solar Model Only)
Central Heating Return
watts litres kg kg
A
mm
mm
BmmCmmDmmEmmFmmGmmH
mm
mm
J
mm
mm
LmmMmmN
mm
Torrent
ECO HP
TEC170-HP C 74 170 37 171 1449 535 720 n/a 1270 1270 670 265 165 n/a 340 n/a 470
n/a 125 90 385 n/a 95 95 295 95 470 295 95 n/a n/a 195 1270 1359 n/a 163 n/a 15
TEC210-HP C 84 210 39 202 1414 585 680 n/a 1235 1235 665 255 160 n/a 325 n/a 455
n/a 125 90 345 n/a 95 95 285 95 455 285 95 n/a n/a 195 1235 1324 n/a 201 n/a 15
TEC250-HP D 93 250 41 242 1654 585 925 n/a 1475 1475 785 305 185 n/a 375 n/a 540
n/a 125 90 590 n/a 95 95 335 95 540 335 95 n/a n/a 195 1475 1564 n/a 239 n/a 15
TEC350-HP D 114 350 43 282 1874 636 1140 n/a 1690 1690 900 355 215 300 430 515 615
n/a 130 95 805 n/a 100 100 385 100 615 385 100 n/a n/a 200 1690 1784 n/a 339 n/a 15
TEC450-HP D 134 450 53 388 1764 738 935 n/a 1490 1490 880 390 310 395 510 595 630
n/a 270 40 600 n/a 270 270 420 270 630 420 270 n/a n/a 370 1490 1674 n/a 431 n/a 15
Torrent
ECO HP SOL
TEC210-HPSOL C 84 210 49 250 1414 585 680 920 1235 1235 845 550 490 n/a 625 n/a 705
95 465 90 345 190 95 435 580 435 705 580 435 355 125 195 1235 1324 0.27 201 62 15
TEC250-HPSOL D 93 250 51 290 1654 585 925 1085 1475 1475 1000 655 580 n/a 730 n/a 830
95 535 90 590 220 95 505 685 505 830 685 505 410 125 195 1475 1564 0.34 239 73 15
TEC350-HPSOL D 114 350 63 398 1874 636 1140 1255 1690 1690 1150 760 660 745 835 920 950
100 600 95 805 225 100 570 790 570 950 790 570 475 130 200 1690 1784 0.40 334 101 15
TEC450-HPSOL D 134 450 68 499 1764 738 935 1185 1490 1490 1100 755 670
750
830 910 900
270 620 40 600 310 390 590 785 590 900 785 590 360 260 370 1490 1674 0.54 431 130 15
DESIGN
TECHNICAL INFORMATION
Torrent ECO HP
V
T
G
N
D
F
L
AA
W
H
BB
B
P
R
X
U
O
S
E
A
J
CC
Page 9
Solid Fuel Return
(Solar Model Only)
Central Heating Return
Drain
Cold Mains To
Plate Heat Exchanger
Solar Sensor
Plate Heat Exchanger Return
Solid Fuel return
Heat Pump Flow
Heat Pump Return
Heat Pump Cylinder Sensor
Heat Pump Flow Sensor
Heat Pump Return Sensor
Solar Flow
Solar return
Cold Feed
Plate Heat Exchanger Flow
Open Vent
Surface Area of
Solar Heater Coil
Capacity (Total Volume)
Dedicated Solar Volume
Maximum Hot Water Flow Rate
MmmNmmOmmPmmQmmRmmS
mmTmmUmmVmmWmmXmmYmmZmmAAmmBBmmCCmm
m2litres litres
litres/
min
n/a 125 90 385 n/a 95 95 295 95 470 295 95 n/a n/a 195 1270 1359 n/a 163 n/a 15
n/a 125 90 345 n/a 95 95 285 95 455 285 95 n/a n/a 195 1235 1324 n/a 201 n/a 15
n/a 125 90 590 n/a 95 95 335 95 540 335 95 n/a n/a 195 1475 1564 n/a 239 n/a 15
n/a 130 95 805 n/a 100 100 385 100 615 385 100 n/a n/a 200 1690 1784 n/a 339 n/a 15
n/a 270 40 600 n/a 270 270 420 270 630 420 270 n/a n/a 370 1490 1674 n/a 431 n/a 15
95 465 90 345 190 95 435 580 435 705 580 435 355 125 195 1235 1324 0.27 201 62 15
95 535 90 590 220 95 505 685 505 830 685 505 410 125 195 1475 1564 0.34 239 73 15
100 600 95 805 225 100 570 790 570 950 790 570 475 130 200 1690 1784 0.40 334 101 15
270 620 40 600 310 390 590 785 590 900 785 590 360 260 370 1490 1674 0.54 431 130 15
DESIGN
TECHNICAL INFORMATION
NOTES
1. The diagrams shown are generic. For
exact product specification refer to
the table eg. the number of immersion
heaters varies depending on model.
2. The specifications shown are the
standard range, but these can be
changed at the time of order to suit
specic installation requirements.
3. All connections are within 145˚, but if
more detail is required, please contact
our technical desk on 01253 474584 or
your local Gledhill depot.
4. The domestic hot water volume and
maximum hot water ow rate gures
are based on the store temperature
being 75˚C.
5. Heat pump models use a 30 plate PHE.
J
Torrent ECO HP SOL
V
T
G
N
X
U
CC
D
F
L
S
W
P
Y
H
A
B
E
BB
C
AA
Q
Z
M
R
O
Page 10
Torrent ECO OV
Available Components and Tappings
1. Open vent - 22mm comp
2. Overheat stat - 1/2” female
3. Plate heat exchanger ow - 22mm
4. Domestic hot water store sensor
5. Immersion heater
6. Solid fuel ow - 28mm comp
7. Hot water supply - 22mm comp
8.
OV boiler ow - 22mm comp (350/450 - 28mm comp)
9. Central heating ow - 22mm comp
10. Limit stat - 1/2” female
11. Cold mains supply - 22mm comp
12. Cold feed - 22mm comp
13. Immersion heater
14. Plate heat exchanger return - 22mm
15. Central heating return - 22mm comp
16.
OV boiler return - 22mm comp (350/450 - 28mm comp)
17. Solid fuel return - 28mm comp
18. Drain - 1/2” female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Scale inhibitor
Torrent ECO SP
Available Components and Tappings
1. Open vent - 22mm comp
2. Overheat stat - 1/2” female
3. Plate heat exchanger ow - 22mm
4. Domestic hot water store sensor
5. Solid fuel ow - 28mm comp
6. Hot water supply - 22mm comp
7. Auxilliary heating ow - 22mm comp
8. Immersion heater
9. Limit stat - 1/2” female
10.
SP coil ow - 22mm comp (250/350 - 28mm comp)
11. Cold mains supply - 22mm comp
12. Cold feed - 22mm comp
13.
SP coil return - 22mm comp (250/350 - 28mm comp)
14. Plate heat exchanger return - 22mm
15. Auxilliary heating return - 22mm comp
16. Solid fuel return - 28mm comp
17. Drain - 1/2” female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Auxilliary heating tappings
G. Scale inhibitor
2
1
9
8
10
13
15
16
17 18
6
5
3
4
7
11
12
14
2
1
7
8
9
10
13
15
16 17
5
3
4
6
11
12
14
DESIGN
SYSTEM DESIGN
Typical arrangement of tappings shown on the appliance, including optional
extras, but these can be adjusted to suit specic installation requirements.
The feed and expansion tank must be sized to take the water expansion of the
whole system (i.e. solid fuel boiler, open vented boiler and auxiliary heating).
Page 11
Torrent ECO SOL
Available Components and Tappings
1. Open vent - 22mm comp (450 - 28mm comp)
2. Overheat stat - 1/2” female
3. Plate heat exchanger ow - 22mm
4. Domestic hot water store sensor
5. Solar sensor
6. Solid fuel ow - 28mm comp
7.
OV boiler ow - 22mm comp (350/450 - 28mm comp
8. Central heating ow - 22mm comp
9. Limit stat - 1/2” female
10.
SP coil ow - 28mm comp (210 - 22mm comp)
11. Hot water supply - 22mm comp
12.
SP coil return - 28mm comp (210 - 22mm comp)
13. Central heating return - 22mm comp
14. Immersion heater
15.
OV boiler return - 22mm comp (350/450 - 28mm comp
16. Solid fuel return - 28mm comp
17. Cold mains supply - 22mm comp
18.
Solar coil ow - 22mm comp (450 - 28mm comp)
19. Cold feed - 22mm comp
20. Solar sensor
21.
Solar coil return - 22mm comp (450 - 28mm comp)
22. Plate heat exchanger return - 22mm
23. Solid fuel return 2 - 28mm comp
24. Drain - 1/2” female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Sealed primary boiler coil
G. Scale inhibitor
2
1
8
7
10
13
20
21
23 24
12
15
16
3
4
11
17
14
19
18
5
6
9
22
DESIGN
SYSTEM DESIGN
Typical arrangement of tappings shown on the appliance, including optional
extras, but these can be adjusted to suit specic installation requirements.
The feed and expansion tank must be sized to take the water expansion of the
whole system (i.e. solid fuel boiler, open vented boiler and auxiliary heating).
Please note there are 2 optional solid fuel return positions on the solar range to enable
the whole store water volume to be used to store heat when the solar contribution
is negligible.
For example, a solid fuel boiler that is used for space heating would be used in the
winter months when the solar contribution is small. Connecting it to the lower return
enables the store to hold more heat when the solar contribution is negligible.
Alternatively an Aga which runs 24 hours 365 days a year would need to be connected
to the upper return when the solar contribution is greatest and the lower when the
solar contribution is least. This allows the solar to make a contribution to the store even
though the Aga is running 24 hours a day. A manual 3-port diverter valve may be used
to switch from summer to winter mode or more sophisticated control methods used.
The controls should be tted to maximise useful energy gain: minimise loss of useful
energy and ensure that back-up heat sources are not used when adequate grade solar
contribution is available. For precise guidance please refer to “table 37 section 6.0a
System controls” of the “Domestic building compliance guide 2010”.
Page 12
Torrent ECO HP
Available Components and Tappings
1. Open vent - 22mm comp (450 - 28mm comp)
2. Store overheat - 1/2” female
3. Plate heat exchanger ow - 22mm
4. Domestic hot water store sensor
5. Hot water supply - 22mm comp
6. Solid fuel ow - 28mm comp
7. Heat pump cylinder sensor
8. Limit stat - 1/2” female
9. Cold mains supply - 22mm comp
10. DHW backup immersion heater
11.
Heat pump ow - 28mm comp (350/450 1.25 Fem)
12. Central heating ow - 22mm comp
13. Domestic hot water store sensor
14. Cold feed - 22mm comp
15. CH boost immersion heater
16. Central heating return - 22mm comp
17. Heat pump return sensor
18.
Heat pump return - 28mm comp (350/450 1.25 Fem)
19. Solid fuel return - 28mm comp
20. Plate heat exchanger return - 22mm
21. Drain - 1/2” female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Scale inhibitor
Torrent ECO HP SOL
Available Components and Tappings
1. Open vent - 22mm comp (450 - 28mm comp)
2. Overheat stat - 1/2” female
3. Plate heat exchanger ow - 22mm
4. Domestic hot water store sensor
5. Solar sensor
6. Solid fuel ow - 28mm comp
7. Heat pump cylinder sensor
8. Limit stat - 1/2” female
9. Hot water supply - 22mm comp
10. DHW backup immersion heater
11. Heat pump ow sensor
12.
Heat pump ow - 28mm comp (350/450 1.25 Fem)
13. Central heating ow - 22mm comp
14. CH boost immersion heater
15. Central heating return - 22mm comp
16. Heat pump return sensor
17.
Heat pump return - 28mm comp (350/450 1.25 Fem)
18. Solid fuel return - 28mm comp
19.
Solar coil ow - 22mm comp (450 - 28mm comp)
20. Cold mains supply - 22mm comp
21. Solar sensor
22. Cold feed - 22mm comp
23.
Solar coil return - 22mm comp (450 - 28mm comp)
24. Solid fuel return - 28mm comp
25. Plate heat exchanger return - 22mm
26. Drain - 1/2” female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Scale inhibitor
2
1
6
8
7
12
13
11
16
18
17 19 21
3
4
5
10
9
14
15
20
2
1
6
8
7
13
15
16
17
19
12
23
24 26
3
5
4
9
10
14
18
11
20
22
21
25
DESIGN
SYSTEM DESIGN
Typical arrangement of tappings shown on the appliance, including optional
extras, but these can be adjusted to suit specic installation requirements.
The feed and expansion tank must be sized to take the water expansion of the
whole system (i.e. solid fuel boiler, open vented boiler and auxiliary heating).
Page 13
DESIGN
SYSTEM DESIGN
General
• All Torrent ECO HP models covered by this manual, are only suitable for open
vented primary (heat pump and space heating) circuits. Therefore the pressure
in the primary circuit depends upon the height of the feed and expansion cistern
and could be as low as 0.20 bar. Therefore ensure that the heat pump selected
will operate at primary circuit pressures e.g. it is not tted with a non-adjustable
low system pressure switch.
• The heat pumps normally operate at lower temperature difference (5-10°C)
between ow and return than that for a gas boilers (10-20°C) resulting in higher ow
rates in the heat pump primary circuit. Therefore it is important that the primary
pipework connecting the heat pump to the thermal store and the circulating pump
are sized to achieve ow rates recommended by the heat pump manufacturer.
• The eciency (i.e. coecient of performance, COP) of a heat pump depends
upon the primary ow and return temperatures and it is generally higher at lower
primary circuit temperatures. Also the heat pumps normally operate at lower ow
temperatures; typically 45-55°C compared with 75-80°C for gas boilers. Therefore if
traditional radiators are used then, these should be oversized in accordance with
the heat pump manufacturers recommendations.
• For optimum operational eciency and hence lower running costs, a low temperature
space heating (e.g. under-oor heating) system should be used where feasible.
Hot water performance of TEC210HP at 15 - 17 l/min draw off rate
Draw-off volume (litres)
Hot water temperature °C
0
10
20
30
40
50
60
0
12.5
25
37.5
50
62.5
75
87.5
100
112.5
125
137.5
150
162.5
175
187.5
200
HW Outlet (55) (°C)
HW Outlet(75) (°C)
HW Outlet (65) (°C)
AVG CW Inlet Temp (°C)
The draw o volume gures shown above are for the TEC210 HP store. These are
increased accordingly as the cylinder capacity increases. The graph illustrates the
increase in volume that can be achieved by the use of the auxiliary heat source.
A 15 - 17 litre/min ow restrictor is tted to the Torrent ECO HP hot water supply
outlet on commissioning. Check that the hot water ow does not exceed 17 litre/min.
Particular attention needs to be paid to the product size selection. If the
intention is for the majority of the hot water to be provided by the heat
pump with minimal use of the auxiliary immersion element then it may
be necessary to choose a larger store.
Heat Pump Sizing
• The eciency (i.e. coecient of performance,
COP) of an air source heat pump and hence
its heat output generally decreases as
the ambient air temperature decreases.
Therefore, this factor should be taken into
account when sizing and selecting the heat
pump.
• The design space heating load of a dwelling
should be calculated in accordance with
BS EN 12831 and/or the CIBSE guide. The
allowance for domestic hot water heating
(shown in table below), depends upon
the operating mode. For example, if the
system is designed to operate with priority
for domestic hot water, then no additional
allowance for hot water is required for sizing
the heat pump.
Allowance for Domestic Hot Water
Heating
Torrent
Model
Allowance for Domestic
Hot Water
Hot Water
Priority
Mode
Flow Share
Mode
180 HP-SOL 0kW 1.5kW
180 HP
210 HP-SOL
0kW 2.5kW
210 HP
250 HP-SOL
0kW 3.0kW
250 HP
300 HP-SOL
0kW 3.5kW
350 HP
450 HP-SOL
0kW 4.0kW
450 HP-SOL 0kW 5.0kW
Page 14
Model Selection
The suggested model sizes shown in the tables
opposite are based on a typical daily hot water
usage and on the assumptions that the heating
system is correctly sized and that the thermal
store is fully charged to at least 75°C by the main
heat source.
When selecting a solar model, it is important
to check the dedicated solar volume (shown in
table on pages 6-7) complies with the Building
Regulations ADL1 Domestic Building Services
Compliance Guide.
The suggested model sizes are based on
typical hot water usage. For high specication
dwellings an increase of one model size should
be considered.
General Design Considerations
As a general rule, the cupboard footprint needs
to be a minimum of 150mm wider, 80mm deeper
and 80mm taller than the unit selected.
The base chosen for the Torrent should be level and
capable of supporting the weight of the unit when
full of water as shown in General Data.
General Restrictions
a. An ascending spray type bidet or any other
appliance with a Class 1 back-syphonage
risk requiring a type A air gap should not be
used.
b. Torrent should not be used where steam is
the primary heating medium.
Torrent ECO OV Model Selection Guide
Max hot water demand Bedrooms Model
1 bathroom 1 - 2 TEC140-OV
1 bathroom + en-suite shower 2 - 4 TEC170-OV
2 bathrooms + en-suite shower 3 - 4 TEC210-OV
2 bathrooms + 2 en-suite showers 3 - 5 TEC250-OV
3 bathrooms + 2 en-suite showers 3 - 5 TEC350-OV
Torrent ECO SP Model Selection Guide
Max hot water demand Bedrooms Model
1 bathroom 1 - 2 TEC140-SP
1 bathroom + en-suite shower 2 - 4 TEC170-SP
2 bathrooms + en-suite shower 3 - 4 TEC210-SP
2 bathrooms + 2 en-suite showers 3 - 5 TEC250-SP
3 bathrooms + 2 en-suite showers 3 - 5 TEC350-SP
Torrent ECO HP Model Selection Guide
Max hot water demand Bedrooms Model
1 bathroom + en-suite shower 2 - 3 TEC170-HP
1 bathroom + 2 en-suite showers 2 - 3 TEC210-HP
2 bathrooms + en-suite shower 3 - 4 TEC250-HP
2 bathrooms + 2 en-suite showers 3 - 4 TEC350-HP
3 bathrooms + 2 en-suite showers 4 - 5 TEC450-HP
Torrent ECO SOL Model Selection Guide
Max hot water demand
Max solar
collector
area (m
2
)
Bedrooms Model
1 bathroom + en-suite shower 2.47 2 - 4 TEC210-SOL
2 bathrooms + en-suite shower 2.91 2 - 4 TEC250-SOL
2 bathrooms + 2 en-suite showers 4.03 3 - 5 TEC350-SOL
3 bathrooms + 2 en-suite showers 5.19 4 - 6 TEC450-SOL
Torrent ECO HP-SOL Model Selection Guide
Max hot water demand
Max solar
collector
area (m
2
)
Bedrooms Model
1 bathroom + en-suite shower 2.47 2 - 3 TEC210-HPSOL
1 bathroom + 2 en-suite showers 2.91 2 - 3 TEC250-HPSOL
2 bathrooms + 1 en-suite shower 4.03 3 - 4 TEC350-HPSOL
2 bathrooms + 2 en-suite showers 5.19 3 - 4 TEC450-HPSOL
INSTALLATION
INSTALLATION
Page 15
Mains Water Supply
A typical arrangement of the hot and cold water system is shown below. All Torrent
models are designed to be fed directly from the mains and they full the requirements
of WRAS Schedule 2 (paragraph 15.2), and therefore do not require a check valve to
be tted to the cold water supply pipe.
The performance of the Torrent is directly related to the cold water supply pressure and
volume to the dwelling. This must be capable of providing for all those services which
could be required simultaneously and the maximum demand should be calculated
for sizing the distribution network.
As a general guideline, although a 15mm external service may be sucient for the
smaller dwelling with one bathroom, a 22mm service is preferred (25mm MDPE) and
should be the minimum for larger dwellings.
The Torrent will operate at dynamic pressure as low as 1.5 bar (at the appliance) which
must be available when the local demand is at its maximum, but the preferred range
is between 2 and 3.0 bar.
If the incoming static mains pressure exceeds 5.0 bar at any point in the 24 hour cycle,
then a pressure limiting valve set at 3.0 bar should be tted downstream of the stop
tap where the cold supply enters the dwelling.
If a water meter is tted in the service pipe, it should have nominal rating to match
the anticipated maximum simultaneous hot and coldwater demand, calculated in
accordance with BS EN 8558:2011. This could be up to 50 l/min in some properties.
The sanitary water equipment used in the system should be suitable for a working
pressure of 10 bar and the units must be fitted strictly in accordance with the
requirements of the Water Supply (Water Fittings) Regulations 1999.
Taps and Shower Fittings
Aerated taps are recommended to prevent
splashing.
All types of shower mixing valves can be used
as long as both hot and cold supplies are mains
fed. However all mains pressure systems are
subject to dynamic changes particularly when
other hot and cold taps/showers are opened
and closed, which will cause changes in the
water temperature at the mixed water outlet
such as showers. For this reason and because
thermostatic showers are now no more
expensive than manual showers, we strongly
recommend thermostatic showers with Torrent.
The shower head provided must also be suitable
for mains pressure supplies.
The hot water supply to a shower-mixing
valve should be fed where practical directly
from the Torrent or be the rst draw-o point
on the hot circuit. The cold water supply to a
shower-mixing valve should where practical
be fed directly from the rising mains via an
independent branch.
The shower must incorporate or be tted with
the necessary check valves to prevent backsyphonage protection in accordance with Water
Regulations.
The supply of hot and cold mains water directly
to the bidet is permitted provided that it is of
the over-rim ushing type and that type ‘A’ air
gap is incorporated.
INSTALLATION
INSTALLATION
TYPICAL HOT AND COLD DISTRIBUTION
Check valve NOT REQUIRED unless
supply pipe services more than one dwelling
Check valve NOT REQUIRED unless scale inhibitor is a chemical type.
In any event, do not fit a check valve down stream of this point (see 5.1.9)
Pressure limiting valve
(Not required unless mains pressure is greater than 5 bar)
Supply
pipe
Second dwelling
Sink
Scale inhibitor
(where necessary)
Bath
H.B.
W.C.
BS1212
Ballvalve
Hot and Cold Distribution Pipe Arrangement - All Models
Page 16
Pipe Layout
In all mains pressure installations it is important to remember that the incoming cold
supply must be shared between all terminal ttings. It is important that a 22mm supply
is brought to the appliance and a 22mm take-o is continued at least to the bath. If
there are two baths, 28mm pipework should be considered. One metre of smaller
diameter pipework, or ow restrictors, should be provided on the nal connection to
all outlets so as to balance the water available. In any event the distribution pipework
should generally be in accordance with BS EN 806:3.
Plastic Pipework
All the recommendations with regard to the heating systems in this manual are
generally based on BS/EN Standards copper pipework and ttings. However plastic
pipework system can be used in place of copper as long as:-
a. The chosen system is recommended for use in domestic heating systems by the
manufacturers and it is installed fully in accordance with their recommendations.
b. The design criterion of the plastic system is at least equivalent to the use of BS/EN
Standards copper pipework and ttings.
c. Barrier pipework for these systems is recommended.
Ball Valve and Overow
The feed and expansion tank can be lled manually if required e.g. using a hose pipe
tted with a double check valve.
In this situation an overow pipe can still be tted if required to ensure that if a leak occurs
on the plate heat exchanger it can be discharged safely to the outside of the building.
Note: If a ball valve is tted, then a warning/overow pipe must always be tted.
The feed and expansion tank (provided by the installer) must be sized correctly to
enable the expansion of the entire system volume. This will include the central heating,
store, solid fuel and boiler circuit volumes.
See page 18 for guidance sizing the feed and expansion tank.
Water Treatment
In all Torrent models, the primary (i.e. non-potable) water is stored and the domestic
hot water is heated instantaneously by means of heat exchangers. Therefore treating
the primary water will not contaminate the domestic hot water supply.
Although the Torrent primary store has no special water treatment requirements, the
radiators and other parts of the circuit will require the application of a scale and corrosion
inhibitor. The volumes and concentration should be calculated in accordance with the
manufacturers instructions and when calculating the system volume (i.e. the water
content), the volume of the Torrent should be taken into account.
Use In Hard Water Areas And Scale Protection
The patented design of the domestic hot water plate heat exchanger is such that
the turbulence through the plates slows down the formation of scale in moderate
hard water conditions. However, the requirements set out in the ‘Domestic Building
Services Compliance Guide’ and the Building Regulations approved documents L1A
and L1B regarding scale protection should be complied with.
These requirements state that; “where the mains water hardness exceeds 200ppm
provision should be made to treat the feed water to the water heaters and the hot
INSTALLATION
INSTALLATION
water circuit of combination boilers to reduce
the rate of accumulation of scale”. To comply
with this requirement: -
a. The hardness of the mains water should be
checked by the installer and if necessary a
suitable in-line scale inhibitor device should
specied for hardness levels between 200
and 300ppm (mg/l).
b. Where the hardness level is 300ppm (mg/l) and
above, the optional phosphate type inhibitor
should be specied and tted at a suitable
point in the cold water supply to the appliance.
It is important that where the supply to the
Torrent is in 22mm the in-line scale inhibitor
is also 22mm. In practice servicing is not
normally required but in hard water areas, the
requirements can be considered similar to those
needed for instantaneous or ‘combi’ appliances.
The installation of scale inhibitor should be in
accordance with the manufacturers instructions
and Water Byelaws.
London Loop
As the thermal store gets hot the water will
expand and the water level in the R&E tank
will rise, as will the level of water in the vent
pipe. Hot water will also rise to the top of the
cylinder. When the water at the base of the
cylinder becomes hotter it may run out the cold
feed connection pipe. If the cold feed pipe then
runs vertically it works like chimney with the hot
water rising to the top in the same way hot air
does from a re. If this section is not insulated
then it will lose heat and waste energy.
If, however, the cold feed is formed into a
sheppard’s crook or london loop it will form a
thermal trap. A thermal trap works by ensuring
that cold water is held below hot water. Because
hot water always rises it will not be able to
move down and around the loop/crook and
therefore will not rise up the cold feed pipe
work. This will reduce heat loss and thereby
prevent energy waste.
The minimum depth of the U trap is calculated by
multiplying the pipe diameter by 8. For example;
• Using 22mm pipework will require a
minimum of 176mm
22mm pipework is highly recommended to
ensure that the London loop does not air lock
during the commissioning process. It also
enables a faster installation of the product due
to the increased lling rate.
Page 17
Wiring The Control Panel
The control panel requires a separate 3 amp fuse spur double pole to ensure safe
isolation. The cable/ex from the fuse spur to the control panel must be a minimum
of 0.75mm2 C.S.A. and be heat resistant. The cable should be clipped to prevent
accidental snagging.
The control panel front cover is secured by 4 black screws. Remove these and lift o
the front cover to expose the power terminals. These are found at the bottom left of
the control panel. Prepare the cable end and feed it through the cable gland.
Use a screwdriver to press the neutral cross down on the WAGO connector. This opens
the clamp and the neutral wire can be fed into the connector. Remove the screwdriver
and test the wire is securely t. Repeat with the PE and live cables. Tighten the cable
gland and check for security. Perform the necessary safety checks and ret the front
panel.
Secondary Hot Water Circulation
If the length of the hot water draw-o pipework is excessive and the delivery time
will be more than 60 seconds before hot water is available at the tap, you may wish to
consider using trace heating to the hot water pipework such as the Raychem HWAT
system. Also a conventional pumped secondary circulation system (shown below)
can be used with any model of the Torrent.
It is important that the cold water pipework is adequately separated and protected
INSTALLATION
INSTALLATION
Thermostat
Immersion Heater Wiring
E
L
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1 2 3
4
1 2 3
4
1
2 3 4
5 6 7 8
1
2
1
2
3
4
5
6
7
8
9
1
10
2
3
4
5
6
J18
J20
J19
J3
J7
J8
J1
TS sensor
GND GND
IN OUT
T1 T2
1
2
CW sensor
1
2
Combined flow
and
HW temperature
sensor
L - Brown
PR61
E – G/Y
N - Blue
PWM -
PWM
+
SPARE
Fuse
Dip
Switch
1 2 3 4
To
DHW
pipe
All the these sensor inputs carry a
Voltage of 5V.
The max cable length is 1 meter.
The sensors connected to the control
Should be free from the appliance earth
from any heating from the hot water pipework
to ensure that the water remains cold and of
drinking water quality.
If secondary circulation is used, there is a
possibility that excessively hot temperatures
may be experienced in the hot water supply
pipework due to the blending valve not being
able to mix with cold water because the water
is always supplied hot. A pipe thermostat is
incorporated in the circuitry which cuts the
supply to the pump when the water in the
return pipe reaches the set temperature of the
blending valve.
Secondary circulation pipework must be
insulated to prevent energy loss in both heated
and unheated areas.
Immersion Heaters
These are 3kW
230V AC heaters
and incorporate
a thermostat.
The thermostat
incorporating
a ‘single shot’
overheat energy
cut out which
means it cannot
be reset and must be replaced if it has operated.
They have incalloy elements to prolong their
life expectancy in aggressive water conditions.
The correct method of connecting the wiring to
the immersion heater is shown here.
Utilising O Peak Electricity
Where it is intended that units are tted to opeak
circuits, then suitable controllers such as the
Horstmann o peak electric time controller will
be required. External wiring to the immersion
heaters must be in accordance with the relevant
IEE Wiring Regulations and the circuit must be
protected by a suitable fuse and a double pole
isolating switch.
Safety
The immersion heaters must be earthed and they
must be isolated from the mains before the cover
is removed on every occasion. Replacement
immersion heaters should be obtained from
Gledhill Building Products Limited.
Important
The unit must not be powered up unless the
thermal store has been lled with water, the
pump has been bled and water is conrmed
Torrent ECO
Inline lter &
ow regulator
Single check
valve
Single
check
valve
Pump isolation
valves
Cold water inlet
Plate heat exchanger
Hot water outlets
Pipework length and
diameter to suit
property demands
Pipework length and
diameter to suit
recirculation ow rate
approx 1-2 l/min
Cold water sensor
Control
stat
Flow switch
Potable water
expansion vessel
Secondary
circulation
pump
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