Glowworm 7kW Quick start guide

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GWTECV710
Glow-worm
Nottingham Road
Belper
Derbyshire
DE56 1JT
www.glow-worm.co.uk
Head Oce:
01773 824 639
Literature:
01773 596 105
Aer Sales Service:
01773 596 510
Technical Advice:
01773 828 300
(Boiler)
08447 361 143
(Renewables)
Training:
01773 596 156

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Clearly Heat Pumps
Technical Guide
www.glow-worm.co.uk

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Introduction
At Glow-worm we specialise in the most practical and straightforward
renewable energy solutions all supported from beginning to end by
Glow-worm’s experienced pre and aer-sales services, assisting you
to make the right choices in this changing world of heating and hot
water technologies.
The Glow-worm Clearly Heat Pumps Technical Guide is designed to
assist with the selection and installation of our latest range of air to
water heat pumps - providing all the technical information you will
ever need, in one easy to use booklet.
With over 75 years of experience in providing UK homes with value
for money heating and hot water solutions, Glow-worm has built a
reputation on providing straightforward and reliable systems you can
depend on.
Glow-worm not only provides straightforward renewable systems
with easy ordering and totally flexible delivery, we also provide you
with expert help and friendly support through design, technical help,
extensive training courses, specialist onsite support and a nationwide
aer sales and spares network.
If you require technical advice, simply call our dedicated
renewable technical help line 0844 736 1143 for a fast and
straightforward answer.
We hope this brochure gives you all the information you need to help
you take the next stage in selecting your new Glow-worm air to water
heat pump. Should you wish to discuss any area in more detail or if
you need any further information, please contact us to see how we
can help.
2

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Contact us
By phone
07773 824 639
By email
[e-mail]
By web
www.glow-wormheating.co.uk
3
Contents
Introduction 2
Clearly Heat Pumps 7, 12, 14kW
Features & Benets 4 - 5
Clearly Heat Pumps 5kW
Features & Benets 6 - 7
System components 8 - 9
Technical information 10 - 11
System sizing 12 - 13
Siting 13 - 17
Envirosorb 5 schematics and wiring
(Clearly Heat Pumps 5kW) 18 - 19
Envirosorb schematics and wiring
(Clearly Heat Pumps 7, 12, 14kW) 20 - 21
Envirosorb including DHW
(Clearly Heat Pumps 7, 12, 14kW) 22 - 23
Zoning 24
Easy ordering 24 - 25
Technical specications 26 - 27
Clearly Hybrid 28 - 29
Support & advice 30 - 31

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At Glow-worm, we specialise in creating the most practical and
straightforward air to water heat pump solutions for homes across
the UK. Glow-worm’s new straightforward air to water heat pump
system has been designed for hassle free installation and complete
heating comfort.
The new 7, 12 and 14kW models combine high performance
inverter compressor technology with straightforward and hassle
free installation to form the basis of a brand new Clearly Heat
Pumps range.
Utilising next generation technology, Glow-worm’s new Clearly
Heat Pumps range oers a high performance Central Heating and
Domestic Hot Water solution for a wide range of domestic properties
delivering excellent green credentials with possible carbon savings
of up to 40%* and an impressive Coecient of Performance (CoP) of
up to 4.06 at A7/W35**
Key benets
• Straightforward range of air to water heat pump systems for
high-performance central heating and domestic hot water
• 7,12 and 14kW output models available
• Range features innovative inverter compressor technology
• MCS-accredited range
• Hydraulic module eliminates the need for glycol in the central
heating circuit
• No additional buer vessels required - creating one compact
space-saving system
• Can deliver signicant carbon savings and help to achieve level 4
of Code for Sustainable Homes
• Quick and easy installation with no F gas qualications required
• Ultra-quiet operation
• One complete system: heat pump, hydraulic module and controls
in a package that’s simple to order
• Can be used in conjunction with the intuitive Climapro RF
handheld programmable room thermostat
* When replacing an older standard eciency boiler
**Tested to EN 14511
NEW Clearly Heat Pumps – 7, 12, 14kW
Features & Benets
4

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5
Envirosorb
For use with
Clearly Heat Pumps
12, 14kW
Envirosorb
For use with
Clearly Heat Pumps
7kW

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Clearly Heat Pumps 5kW combines high performance renewable
technology with straightforward installation, to provide a highly
ecient central heating and domestic hot water solution for smaller,
well insulated properties.
Installation and servicing is hassle free with no F gas qualications
needed to install and no need for glycol in the central heating circuit,
thanks to advances in its Hydraulic Module system technology.
All components are easily accessible within the compact unit and
no separate expansion vessels or additional buer vessels are
required, making this one of the most installation friendly heat
pumps available on the UK market.
This highly ecient heat pump system provides excellent green
credentials and can contribute signicantly towards meeting a
range of environmental legislative targets. Clearly Heat Pumps
5kW can deliver carbon savings of over 40%* and can be used to
help achieve level 4 of the Code for Sustainable Homes. Clearly
Heat Pumps 5kW also has full MCS Accreditation meaning that it is
eligible for possible future RHI funding.
*when replacing an older, standard eciency boiler
6
Key benets
• Highly ecient heating and hot water solution for smaller
properties
• One complete system: includes system control unit, wireless
outdoor sensor & Climapro RF wireless programmable control
• Compact in size
• Ultra quiet operation
• Quick and straightforward to install & service, with no F Gas
qualications required
• No Glycol needed in the central heating circuit
• Compact, wall-hung hydraulic module including small buer
vessel, expansion vessel, circulating pump, lling valves,
PRV and back up heater
• MCS accredited
• Can help to achieve Code for Sustainable Homes level 4
• Comprehensive back up from nationwide aer sales service
• Can be used in conjunction with the intuitive Climapro RF
handheld programmable room thermostat
NEW Clearly Heat Pumps - 5kW
Features & Benets

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7
Envirosorb 5
For use with
Clearly Heat Pumps
5kW

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8
Introducing Glow-worm's complete
range of straightforward air to water
heat pumps
System components
Envirosorb 5
(for Clearly Heat Pumps 5kW)
5kW model available
The slimline air to water heat pump is
extremely quiet and very compact. With
a COP of 3.73 it produces almost 5kW
of heat energy which can be used for
central heating and domestic hot water.
The heat pump is also incredibly
straightforward to install with no F Gas
qualications required and no glycol
needed in the central heating circuit.
Dimensions
935mm x 880mm x 345mm
Key features
• Slimline and compact monobloc outdoor unit
• High COP eciency of 3.73*
• Uses non ozone depleting R410a refrigerant
• No F-gas qualication needed to install
• Extremely quiet – modulating DC fan speed of 180-660 rpm
• All components easily accessible for servicing/replacement
*Measured at air temperature 7°C and water at 35°C
Key features
• 7, 12 and 14kW models feature
inverter technology
• No F gas qualications needed
for installation
• Prelled with R410A non ozone
depleting refrigerant
• All components easily accessible
for installation/servicing
• Excellent Coecient of
Performance of up to 4.06. *
• High flow temperature up to 60°C
*Measured at air temperature 7°C and water at 35°C
Envirosorb
(for Clearly Heat Pumps 7, 12 & 14kW)
7, 12, & 14kW models available
The air to water heat pump oers a slimline and attractive outdoor
unit solution. The impressive Envirosorb also benets from
advanced inverter compressor technology.
Dimensions
7kW Model: 821mm x 908mm x 326mm
12 & 14kW Models: 1363mm x 908mm x 326mm

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9
Systempro
The Systempro acts as a central
installer interface, where
maintenance menus, fault history,
system parameters, etc. can all be
programmed and accessed.
Dimensions
290mm x 264mm x 45mm
Key features
• Intelligent wiring centre for
the system
• Central installer interface
• No need for end user
interaction
• Can be used to control a
multi-zone system
Climapro RF
Glow-worm’s most intuitive and
user friendly control;
Climapro RF is the main point of
interaction with the system for the
homeowner. The handheld control
enables homeowners to simply
and quickly programme their
specic heating and hot water
requirements in detail, from the
comfort of their armchair.
Key features
• Wireless, programmable room
thermostat for complete time
and temperature control
• Large backlit display
• Handheld unit, can be wall
mounted or taken around the
home
• Provides room and weather
compensation when combined
with wireless outdoor sensor
Wireless outdoor sensor
The Glow-worm wireless outdoor
sensor intelligently communicates
the outside temperature to the rest
of the system to provide weather
compensated flow temperatures
for maximum eciency. The
sensor is small and discreet, and
no external wiring is required
between the unit and the rest of
the system.
Key features
• Works on indirect sunlight,
which charges the inbuilt
PV cells
• No maintenance required
• Simple and quick to install
Hydraulic Module SA
The Hydraulic Module contains the
circulating pump, which transfers
the heat generated by the heat
pump into the heating system.
It also separates the heat pump
circuit from the central heating
circuit meaning that you don’t
need to ll the whole system with
glycol anti-freeze. The Hydraulic
Module in itself is compact and
easy to install, as no separate
expansion vessel or additional
buer vessels are required.
Dimensions
890mm x 418mm x 370mm
Key features
• Single indoor unit
• 6 kW variable immersion
heater to ensure maximum end
user comfort
• Incorporates two three way
valves for easy lling of the
glycol circuit
Glow-worm cylinder
Clearly Heat Pumps is
compatible with Glow-worm's
range of stainless steel hot
water twin coil cylinders.

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Heat pump eciencies
COP – The ‘Coecient of Performance’ simply put is the relationship
between the power consumed by the appliance and the output in
heat. For example a 90% ecient gas boiler can produce 0.9kW of
heat from every 1kW of gas it uses, giving it a COP of 0.9. However,
under the correct conditions, a heat pump can produce up to 4kW
of heat from every 1kW of electricity it uses (giving it a COP of 4)
Glow-worm’s Clearly Heat Pumps range have COPs up to 4.06.
The compressor
The compressor is the heart of the heat pump which needs to be
protected. Some heat pumps such as the Glow-worm Envirosorb (for
Clearly Heat Pumps 7, 12, 14kW) have an inverter compressor which
means that the heat pump is able to modulate the compressor to
suit the energy needs of the home which helps to protect it coming
on, and going o frequently. An inverter compressor is essential on
larger output heat pumps to maximise the life of the appliance and
capitalise on the eciency of the system.
Clearly Heat Pumps
Technical information
10

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Compressor
Expansion device
Heating flow
upto 60°C
Heating return
Heat from ambient air
External heat exchanger
Plate heat exchanger
7°C
Refrigeration cycle
Using exactly the same principles as a fridge, the heat pump employs
the characteristics of a refrigerant. A fan draws air across a large
heat exchanger (or evaporator coil). As the refrigerant has a very low
boiling point, even in the depths of winter, this refrigerant is boiling.
The refrigerant passes into the compressor, where it is compressed
(think of the eect of a bicycle pump) to take it up to a temperature we
can use to heat the home.
The now hot gas passes into a plate heat exchanger, where it gives
up its heat to the heating system flow, whilst turning into a liquid.
With the hot system water now on its way round the heating system,
the refrigerant liquid nally passes through an expansion valve.
The expansion valve acts like an aerosol, turning it back into a low
temperature gas, to begin the whole process all over again.
11

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12
Technical information
System sizing
Functioning limits of the 7-14kW heat pump
during heating
Naturally, a unit that uses air as its source for heat, will perform better
as the temperature of that air increases. The industry standard for
quoting the output of heat pumps is Air 7/ Water 35. So, a 14kW heat
pump will deliver 14kW at an air temperature of 7°C when generating
a flow temperature of 35°C. Below are the outputs at various other
temperatures. The lower the flow temperature, and the higher the
ambient temperature, the more ecient they become: the system
should therefore be designed for as low flow temperature as possible.
Available Power - The Glow-worm range
Outdoor temp Units 5kW 7kW 12kW 14kW
35° Flow
-5 kW 3.1 4.55 7.40 8.31
COP 2.45 2.71 2.75 2.62
2kW 4 5.41 8.72 10.2
COP 3.1 2.99 3.11 3.2
7kW 4.8 7.2 11.82 14.5
COP 3.8 3.9 3.9 4.06
45° Flow
-5 kW 2.6 4.45 6.96 7.9
COP 1.8 2.28 2.24 2.1
2kW 3.9 5.38 8.45 10.2
COP 2.6 2.55 2.61 2.6
7kW 4.5 7.4 11.38 14
COP 3.1 3.16 3.03 3.21
55° Flow
-5 kW 2.02 4.24 7.06 7.6
COP 1.38 2.02 1.92 1.8
2kW 3.7 5.14 8.47 10.2
COP 2.15 2.34 2.2 2.6
7kW 4.35 6.71 11.04 13.9
COP 2.5 2.68 2.5 2.82
A
70
60
50
45
40
30
20
10
0-20 -10 0 10 20 30 B
A= Flow temperature B= Outdoor temperature

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For a design with a 45 degree flow temperature, such as underfloor
heating, or correctly sized radiators, the table below shows the
maximum size of a property each output is suitable for, based on
build year. Please note this does not take into account DHW.
These maximum sizes will ensure 100% coverage down to -5°C.
Pipe Sizing
Consideration needs to be given to the lower flow temperatures that
come from heat pumps, and also the smaller t required (5°C):
Typically systems from 4-10kW should be in 28mm. 10kW - 14kW
should be in 35mm (Some 14kW systems may require 42mm)
13
Technical information
5kW 7kW 12kW 14kW
New build (to 2010 regs) up to 65m2up to 100m2up to 185m2up to 200m2
2006 - 2010 up to 50m2up to 90m2up to 135m2up to 155m2
1995 - 2005 up to 55m2up to 85m2up to 100m2
1975 - 1995 up to 70m2up to 80m2
Technical information
Siting
AWHP unit dimensions
All measurements in mm.
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
5kW
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
7kW

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14
Hydraulic Module
The Hydraulic Module must be placed indoors.
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
12-14kW
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
All measurements in mm.
Technical information
Siting
AWHP unit dimensions
All measurements in mm.

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15
345
880
171
171 538
37
898
350
150
150 600
908
326
1363
150
150 600
908
326
821
=320=
=368=
700
57,5
57,5
57,5
57,5
1740,5
50 min
50 min
50 mini
418
370
890
5
7
8
6
3
11
22
13
14
15
16
17
9
10
12
2
4
18
19
20
21
1
B
AE
D
C
1 Heating circuit return shuto valve
2 Heating lter
3 Disconnector
4 Filler tap
5 3-way valve with shut-o valve for glycol relling
6 Balancing valve
7 By-pass
8 Pump
9 Heating outlet temperature sensor
10 Expansion tank
11 Tank
12 Heating circuit safety valve
13 Pressure sensor
14 Plate heat exchanger
15 Heat pump circuit safety valve
16 3-way valve with shut-o valve for glycol relling
17 Pressure gauge
18 Heating circuit flow shuto valve
19 Heat pump return circuit shuto valve
20 Heat pump flow circuit shuto valve
21 Cold water inlet shuto tap
22 Electric back-up heater
A Heating circuit return
B Heating circuit flow
c Heat pump circuit return
D Heat pump circuit flow
E Cold water inlet

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>200
mm
>1000
mm
>300
mm
>300
mm
>500
mm
>1500
mm
>500
mm
>500
mm
16
Minimum Clearances
5kW
7-14kW
Although these are minimum clearances, please note that the air
expelled to the front of heat pumps is extremely cold which needs to
be taken into consideration. As cold air sinks, placing an air to water
heat pump in a small, enclosed garden will chill the air available to
the unit, and impede its operation and eciency. Raising the units
slightly o the ground by using wall brackets or a stand will improve
the eciency.
The unit should ideally be:
• South facing
• Sited in a wide
open space
The unit should NOT be:
• Placed inside an
enclosed space
(e.g. a garage)
• Placed next to a fence
O
P

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Hydraulic connections :
Heat pump flow circuit ¼ turn shut-o valve in the direction of
the building (not included)
Return circuit ¼ turn shut-o valve in the direction of the heat
pump (not included)
Return circuit hose in the direction of the heat pump (not
supplied)
Cap
Return connection (Ø1 «) to the heat pump
Flow heat pump connection (Ø1 «) to the building
Flow heat pump circuit hose in the direction of the building
(not supplied))
Insulation (not supplied)
1m min.
1
2
3
45
46
78
1
2
3
5
4
6
7
8
17
Flexible hoses to be used to avoid noise transmission.
Please note:
• Air source heat pumps do not fall within ‘permitted developments’,
therefore planning permission should always be sought
• Care should be taken to ensure condensate can drain away freely
• To avoid noise transmission from the unit into the home, flexible
hoses should be used immediately o the heat pump
• Connections to the rear of the heat pumps are 1” BSP male threads
• All external pipe work must be insulated to prevent heat loss
• To maximise eciency, distance from heat pump to the hydraulic
module should be as short as possible.
• The recommended Glycol solution of 30% will protect the heat
pump down to -15°C
• The 230V power cable to the heat pump should be 3 x 2.5mm² while
eBus and control cables should be 0.75mm².
• Heat pump should be raised suciently for condensate to drain
away without risk of freezing.

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18
230V
12
21
OUT1
12
21
OUT2
12
21
OUT3
12
21
IN2
12
21
IN3
12
21
NTC1
12
21
NTC2
12
21
NTC3
12
21
NTC4
12
-+
EBUS
12
-+
EBUS
12
-+
EBUS
13
LN
230V~
13
LN
REL1
13
LN
REL2
13
LN
REL3
12
LN
REL4
12
LN
REL5
12
LN
IN1
D
E
C
A
B
230V230V
Envirosorb 5 schematics and wiring
(for Clearly Heat Pumps 5kW)
Key points –
Connection to the Envirosorb 5kW heat pump - Select Systempro
scheme 4

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19
230V
12
21
OUT1
12
21
OUT2
12
21
OUT3
12
21
IN2
12
21
IN3
12
21
NTC1
12
21
NTC2
12
21
NTC3
12
21
NTC4
12
-+
EBUS
12
-+
EBUS
12
-+
EBUS
13
LN
230V~
13
LN
REL1
13
LN
REL2
13
LN
REL3
12
LN
REL4
12
LN
REL5
12
LN
IN1
D
E
C
A
B
230V230V