Gledhill Torrent THP150 Benutzerhandbuch

Design, Installation

& Servicing Instructions

All models comply with the HotWater Association

speciﬁcation for thermal stores

Please leave these instructions adjacent

to the appliance

An open vented mains pressure

thermal store designed for use

with heat pumps

Page 2

CONTENTS

Section Page

DESIGN

Introduction 3

System Design 8

INSTALLATION

Installation 11

Commissioning 17

SERVICING

Short Parts List 18

APPENDIX

Appendix A 19

Appendix B 20

Terms & Conditions 22

ISSUE 2:10-09

AWRASlistedproductdevelopedbyGledhill

BuildingProductsinthe1980’sinconjunction

with British Gas plc.

British patent nos.1358166,2136099

Britishpatentapplicationspublishedunder

nos.2136099,2153503,2153504,8516025

This product is manufactured under an ISO

9001:2008 Quality System audited by BSI.

Gledhill’sﬁrstpriorityistogiveahighquality

service to our customers.

Quality is built into every Gledhill product

and we hope you get satisfactory service

from Gledhill.

If not please let us know.

Building Regulations and Benchmark Commissioning

TheBuilding Regulations (England &Wales)require thatthe installation of a heating

appliance be notiﬁed to the relevant Local Authority Building Control Department.

From 1st April 2005 this can be achieved via a Competent Person Self Certiﬁcation

Scheme as an option to notifying the Local Authority directly. Similar arrangements

will follow for Scotland and will apply in Northern Ireland from 1st January 06.

CORGI operates a Self Certiﬁcation Scheme for gas heating appliances.

Thesearrangementsrepresentachangefromthesituationwherebycompliancewith

theBuildingRegulationswasacceptediftheBenchmarkLogbookwascompletedand

this was then left on site with the customer).

Withtheintroductionofaselfcertiﬁcationscheme,theBenchmarkLogbookisbeing

replacedbyasimilardocumentintheformofacommissioningchecklistandaservice

interval record is included with all gas appliance manuals. However, the relevant

Benchmark Logbook is still being included with all Thermal Storage products and

unvented cylinders.

Gledhill fully supports the Benchmark aims to improve the standards of installation

andcommissioningofcentralheatingsystemsintheUKandtoencouragetheregular

servicing of all central heating systems to ensure safety and efﬁciency.

Building Regulations require that the heating installation should comply with the

manufacturer’s instructions. It is therefore important that the commissioning check

listiscompletedbythecompetentinstaller.Thischecklistonlyappliestoinstallations

in dwellings or some related structures.

Page 3

INTRODUCTION

DESIGN

These instructions should be read in conjunction with the Installation and Servicing

Instructions issued by the manufacturers of the heat pump used.

Anywaterdistributionandcentralheatinginstallationmustcomplywiththerelevant

recommendations of the current version of the Regulations and British Standards

listed below:-

Gas Safety Regulations

Building Regulations

I.E.E. Requirements for Electrical Installations

Water Regulations

British Standards

BS6798,BS5449,BS5546,BS5440:1,BS5440:2,CP331:3,BS6700,BS5258,BS7593:1993

and BS7671.

It must be installed by a competent person as stated in the Gas Safety Regulations

where applicable.Manufacturers notes must NOT be taken as over-riding statutory

obligations.

Torrent HP is not covered by Section G3 of the current Building Regulations but the

installationisnotiﬁabletobuildingcontrolunlessitiscarriedoutunderanapproved

competent person self-certiﬁcation scheme.

Althoughthe secondary supply(domestic)is atmains pressure,itis notnecessary to

ﬁtanexpansion chamber,pressureor temperaturerelief valve,the plumbing should

allow any unusual build up of pressure to be relieved at the ball valve.

The information in this manual is provided to assist generally in the selection of

equipment. The responsibility for the selection and speciﬁcation of the equipment

must however remain that of the customer and any Designers or Consultants

concerned with the design and installation.

Please Note: We do not therefore accept any responsibility for matters of design,

selectionor speciﬁcation or forthe effectiveness of aninstallationcontaining one of

our products unless we have been speciﬁcally requested to do so.

Allgoodsare sold subjecttoourConditions of SaleandWarranty Terms, which

are set out at the rear of this manual.

In the interest of continuously improving the Torrent HP range, Gledhill Building

Products Ltd reserve the right to modify the product without notice, and in these

circumstances this document, which is accurate at the time of printing, should be

disregarded. It will however be updated as soon as possible after the change has

occurred.

Description

TheTorrentHPisadirectlyheated,openvented

thermal store designed for use with an air

sourceoragroundsourceheatpump.Although

the thermal store is open vented, the mains

pressure hot water is heated instantaneously

by means of heat exchangers inside the store

(Figures 1 & 2).

TheTorrentHPrangeofprimarythermalstores

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. Notification

to Building Control to comply with Section

G3 of the Building Regulations is therefore

not required. This is because the thermal

store is vented in the normal way and unlike

an unvented storage cylinder, the Torrent

HP range require no regular maintenance

or annual inspection. This reduces running

costs for the home-owner while offering high

performance showers and high ﬂow rates to

ﬁll baths rapidly.

Becausethis product doesnot require asafety

discharge from the temperature and pressure

relief valve, any installation will be easy to

incorporateintothebuildingandwillnotsuffer

from the problems associated with using soil

stacks to take the high temperature discharge

from unvented cylinders.

Page 4

DESIGN

INTRODUCTION

Torrent HP Models

The Torrent HP is insulated to a very high

standard using high density HCFC free foam

casedinasteelshellandthereforehasanozone

deletion potential (ODP) of zero and a global

warming potential (GWP) of 1.

The speciﬁcation of the models is listed in table 1

andthemodelselectionguideisshownintable2.

The hot water performance of the Torrent HP

dependsuponthestoretemperatureasshown

in ﬁgures 3, 4 and 5.

Thesuggestedmodelsizesarebasedontypicalhot

waterusageandthestorechargedtoabout65°C.If

thestorechargetemperatureisgoingtobelower,

thenalargermodelshouldbeconsidered.

This is especially important where the heat

pump alone is unable to charge the store

to 65°C as is likely to be the case with a heat

pump.Iftheimmersionelementisusedtoraise

the temperature of the store, then a suitable

control system should be used to ensure the

immersionelement does not operateuntil the

heatpumphasraisedthestoretothemaximum

temperature, or the overall efﬁciency of the

system will be reduced.

Additionalthermostatpocketsareprovidedfor

thispurposeandaschematicwiringdiagramis

shown in ﬁgure 10.

When selecting a solar model, it is important

to check that the dedicated solar volume

(shown in table 1) is suitable for the ﬂoor area

of the dwelling to ensure compliance with the

Building Regulations.

The Torrent HP models are designed to be

heated directly by the heat pump and the

central heating can be supplied directly from

the heat pump as shown in ﬁgure 6 or from a

thermal store as shown in ﬁgure 7.

The Torrent HP-solar models are designed

to be heated directly by the heat pump and

indirectlybythesolarthermalsystemasshown

schematically in ﬁgures 8 and 9.

All models are ﬁtted with a 3kW immersion

heater for boosting the store temperature

(if necessary) and some models can also be

connected to a solid fuel appliance (e.g. wood

burning stove) as well as the heat pump. All

TorrentHPmodelsaresuppliedwithfollowing

equipment as standard: -

• 1feedandexpansioncisterncompletewith

ball valve and ﬂoat

• 1 3kW immersion heater (230Vac, 50Hz)

• 2 store thermostats

Overflow pipe

Heat pump - Flow

Hot water outlet

Cold mains feed

Adjustable thermostatic

mixing valve

Wood burning stove

-Flow

Wood burning stove

-Return

Heat pump - Return

Central heating

-Flow

Central heating

-Return

Immersion heater

Heat pump

control thermostat

Heat pump

control thermostat

Overheat

thermostat pocket

Figure 1 : Torrent

F & E CisternF & E Cistern

Overflow pipe

Heat pump - Flow

Hot water outlet

Cold mains feed

Adjustable thermostatic

mixing valve

Wood burning stove

-Flow

Wood burning stove

-Return

Heat pump - Return

Central heating

-Flow

Central heating

-Return

Immersion heater

Heat pump

control thermostat

Heat pump

control thermostat

Overheat

thermostat pocket

Figure 1 : Torrent

F & E CisternF & E Cistern

Overflow pipe

Hot water outlet

Cold mains feed

Adjustable thermostatic

mixing valve

Central heating

Flow

Central heating

Return

Immersion heater

Heat pump

control thermostat

Overheat

thermostat pocket

Heat pump - Flow

Wood burning stove

-Flow

Wood burning stove

- Return

Heat pump - Return

Solar heating - Flow

Solar heating - Return

Solar sensor pocket

Heat pump

control thermostat

Overflow pipe

Hot water outlet

Cold mains feed

Adjustable thermostatic

mixing valve

Central heating

Flow

Central heating

Return

Immersion heater

Heat pump

control thermostat

Overheat

thermostat pocket

Heat pump - Flow

Wood burning stove

-Flow

Wood burning stove

- Return

Heat pump - Return

Solar heating - Flow

Solar heating - Return

Solar sensor pocket

Heat pump

control thermostat

Page 5

INTRODUCTION

DESIGN

Figure 3 : Hot water performance of T150HP at 15 - 17 l/min draw off rate

0 20406080100120140160

Draw-off volume (litres)

Hot water temperature °C

55°C Store temperature 60°C Store temperature 65°C Store temperature

Theperformanceﬁguresshownaboveforthe150litrestoreareincreasedaccordingly

asthecylindercapacityincreases.Thegraphillustratestheincreasein volummethat

can be achieved by the use of the auxiliary heat source.

A15-17litre/minﬂowrestrictorisﬁttedtotheTorrentHPhotwatersupplyoutleton

commissioning.Check that the hot water ﬂow 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

pumpwithminimaluseoftheauxiliaryimmersionelementthenitmaybe

necessary to choose a larger store.

Page 6

DESIGN

INTRODUCTION

F & Cistern

Overflow pipe

PRV

Heat pump HP

Pump

3-Port

diverter

valve

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 6: Typical Torrent

system configuration with an optional wood burning stove

and central heating supplied directly from the heat pump.

F & Cistern

Overflow pipe

PRV

Heat pump HP

Pump

3-Port

diverter

valve

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 6: Typical Torrent

system configuration with an optional wood burning stove

and central heating supplied directly from the heat pump.

F & Cistern

Overflow pipe

Pump Hot water outlet

Mains cold water inlet

Figure 7: Typical Torrent

system configuration with central heating supplied from a thermal store

Pump

PRV

Heat pump

F & Cistern

Overflow pipe

Pump Hot water outlet

Mains cold water inlet

Figure 7: Typical Torrent

system configuration with central heating supplied from a thermal store

Pump

PRV

Heat pump

Page 7

INTRODUCTION

DESIGN

PRV

Heat pump

3-Port diverter

valve

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 8: Typical TorrentHP-sol system configuration with optional wood burning stove

and central heating supplied directly from the heat pump.

F & E

Cistern

Overflow pipe

Pump

PRV

Solar pumping

station

Expansion

vessel

PRV

Heat pump

3-Port diverter

valve

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 8: Typical TorrentHP-sol system configuration with optional wood burning stove

and central heating supplied directly from the heat pump.

F & E

Cistern

Overflow pipe

Pump

PRV

Solar pumping

station

Expansion

vessel

PRV

Heat pump

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 9: Typical TorrentHP-sol system configuration with wood burning stove option

and central heating supplied from the thermal store

F & E

Cistern

Overflow pipe

Pump

PRV

Solar pumping

station

Expansion

vessel

Pump

PRV

Heat pump

Hot water outlet

Mains cold water inlet

Wood stove

(Option)

Figure 9: Typical TorrentHP-sol system configuration with wood burning stove option

and central heating supplied from the thermal store

F & E

Cistern

Overflow pipe

Pump

PRV

Solar pumping

station

Expansion

vessel

Pump

Page 8

DESIGN

SYSTEM DESIGN

General

• All Torrent 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 ﬁtted with a non-adjustable low

system pressure switch.

• The heat pumps normally operate at lower temperature difference (5-10°C)

betweenﬂowandreturnthanthatforagasboilers(10-20°C)resultinginhigherﬂow

rates in the heat pump primary circuit. Therefore it is important that the primary

pipeworkconnectingtheheatpumptothethermalstoreandthecirculatingpump

are sized to achieve ﬂow rates recommended by the heat pump manufacturer.

• The efﬁciency (i.e. coefﬁcient of performance, COP) of a heat pump depends

upontheprimaryﬂowandreturntemperaturesanditisgenerallyhigheratlower

primarycircuittemperatures.Alsotheheatpumpsnormallyoperateatlowerﬂow

temperatures;typically45-55°Ccomparedwith75-80°Cforgasboilers.Thereforeif

traditionalradiators areusedthen, theseshouldbe oversizedinaccordance with

the heat pump manufacturers recommendations.

• For optimum operational efficiency and hence lower running costs, a low

temperaturespaceheating(e.g.under-ﬂoorheating)systemshouldbeusedwhere

feasible.

Heat Pump Sizing

• The efﬁciency (i.e. coefﬁcient 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 5449. The allowance for domestic hot water heating (shown in table

below),dependsupontheoperatingmode.Forexample,ifthesystemisdesigned

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 HotWater Heating

Model Allowance for Domestic HotWater

HotWater Priority Mode Flow Share Mode

THP150

THP180-SOL 0kW 1.5kW

THP180

THP210-SOL 0kW 2.5kW

THP210

THP250-SOL 0kW 3.0kW

THP250

THP300-SOL 0kW 3.5kW

THP300

THP450-SOL 0kW 4.0kW

THP450-SOL 0kW 5.0kW

Heating System Arrangement

The Torrent HP models are designed to be

heated directly by an air or a ground source

heat pump and the space heating can be

supplied directly from the heat pump circuit

asshowninﬁgures6and8orfromthethermal

storeasshowninﬁgures7and9.Theselection

betweenthetwooptionswilldependuponthe

operating characteristics of the heat pump,

type of heating system and control strategy.

For general guidance: -

• If the heat pump requires a buffer for

operation; for example to reduce rapid

cycling etc, then the system would beneﬁt

if the heating system is supplied from

the thermal store (figures 7 and 9). In

this configuration, the operation of the

heat pump Is only controlled by the store

thermostat(s).

• Iftheheatpumpismulti-stageormodulating

typeorhasweathercompensatingcontrols,

then the space heating circuit should be

supplied directly from the heat pump as

shown in figures 6 and 8. In this system

conﬁguration,thethermalstoreisonlyused

for producing hot water.

• A hybrid system arrangement can also

be used (not shown). For example; a low

temperatureweathercompensatedheating

circuit e.g. under floor heating can be

supplieddirectlyfromtheheatpumpcircuit

andconstanttemperaturee.g.towelrailscan

be supplied from the thermal store.

Ballvalve/overﬂow - All Models

Where the whole of the heating system is

supplied from the thermal store,ﬁgures 7 and

9,thenaballvalveandoverﬂowshouldbeﬁtted

in the feed and expansion tank.

Where the heat pump supplies the heating

circuit directly, ﬁgures 6 and 8, then ﬁtting a

ballvalveandoverﬂowisoptionalifitispractical

onoccasionstomanuallyﬁllthestore.However,

ﬁttingaballvalveandoverﬂowwilleliminatethe

needforthehouseholdertoundertakethistask

and is therefore preferable.If the siting of the

Torrent HP makes it difﬁcult to ﬁt an overﬂow

then the‘manual ﬁll’option can be used.In all

cases,if a ballvalve is ﬁtted,then an overﬂow/

warning pipe must always be ﬁtted.

Page 9

SYSTEM DESIGN

DESIGN

Plastic PipeWork

All the recommendations with regard to the heating systems in this manual are

generally based on BS/EN Standard copper pipework and ﬁttings. However plastic

pipework system can be used in place of copper as long as:

• The chosen system is recommended for use in domestic heating systems

by the manufacturers and it is installed fully in accordance with their

recommendations.

• ThedesigncriterionoftheplasticsystemisatleastequivalenttotheuseofBS/EN

Standard copper pipework and ﬁttings.

• The barrier pipework for these systems is recommended.

Use In HardWater Areas - All Models

Thepatenteddesignoftheheatexchangemoduleissuchthattheturbulencethrough

the coil slows down the formation of scale in even the hardest water conditions,at

normal operating pressures.

Scale Protection

The Building Regulations approved document L1A and L1B and the requirements

set out in the ‘Domestic Heating Compliance Guide’ specify that “where the mains

waterhardnessexceed200ppmprovisionshouldbemadetotreatthefeedwaterto

the water heaters and the hot water circuit of combination boilers to reduce rate of

accumulation of lime scale”.

Tocomplywiththisrequirement,thehardnessofthemainswatershouldbechecked

by the installer and if necessary a suitable in-line scale inhibitor device should be

speciﬁed for hardness levels between 200 and 300ppm (mg/l).

ItisimportantthatwherethesupplytotheTorrentisin22mmthein-linescaleinhibitor

is also 22mm. In practice servicing is not normally required but in hard water areas

requirementscanbeconsideredsimilartothoseneededforinstantaneousor‘combi’

appliances.

Theinstallationofthescaleinhibitorshouldbeinaccordancewiththemanufacturers

instructions and with the Water Byelaws.

Wherethewaterhardnesslevelis300ppm(mg/l)andabove,theoptionalphosphate

type inhibitor should be speciﬁed and ﬁtted at a suitable point in the cold water

supply to the appliance.

WaterTreatment And Frost Protection

Althoughthe TorrentHP hasno specialwatertreatmentrequirements,the radiators

and other parts of the circuit will require the application of a scale and corrosion

inhibitor. The heat pump and the external connecting pipework will also require

protection against freezing. For this reason, a combined antifreeze and inhibitor

product such as Fernox Alphi 11 must be used (see Fernox Alphi 11 datasheet in

Appendix B).

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 HP should be taken into account (see table ).

InallTorrentHPmodels,treatingtheprimarywaterwillnotcontaminatethedomestic

hot water.

Page 10

Table 1a - Technical Speciﬁcation ofTorrent HP

THP150 THP180 THP210 THP250 THP300 THP450

Nominal volume litres 149 191 224 250 300 450

Overallheight mm 1440 1440 1675 1600 1800 1800

Overalldiameter mm 555 555 555 655 655 855

Minimum cupboard size Height mm 1990 1990 2225 2150 2350 2350

Width mm 680 680 680 780 780 780

Depth mm 680 680 680 780 780 780

Weight Empty kg 51 54 58 63 67 77

Full kg 200 245 282 313 367 527

Standbyheat loss rate kW/24h 1.56 1.82 2.08 2.25 2.41 2.85

Maximum working pressure

Open vented store mWG 5.0 5.0 5.0 5.0 5.0 5.0

Space heating and heat pump

primary circuits mWG 5.0 5.0 5.0 5.0 5.0 5.0

Solar heat exchanger bar 6.0 6.0 6.0 6.0 6.0 6.0

Connections

Open vent mm 22 22 22 28 28 28

Coldfeed mm 15 15 15 15 15 15

CH ﬂowand return mm - 22 22 28 28 35

HP ﬂowand return mm 22 22 22 28 35 35

Wood burning stove ﬂow and

return mm - 2828282828

Drain in R½” R½” R½” R½” R½” R½”

Thermostat / sensor pockets Heat pump control thermostat

pockets 1 & 2 in R½” R½” R½” R½” R½” R½”

Over heat thermostatic pocket mm 8.5 ID 8.5 ID 8.5 ID 8.5 ID 8.5 ID 8.5 ID

3kW,230Vac,50Hz immersion heaters - type 2 111122

Hot water draw off volume at

35°C temperature rise (1)

Store charged at 55°C litres 70 90 100 118 136 193

Storecharged at 60°C litres 100 130 140 165 195 275

Storecharged at 65°C litres 125 155 180 210 240 350

Notes

(1) Hot water draw-off rate 15-17 l/min for 150/180/210,17-20 l/min for 250/300 and 22-25 l/min for 450

DESIGN

SYSTEM DESIGN

Table 2a - Model selection guide

Bedrooms 1-2 2-3 2-3 3-4 3-4 4-5

Bathrooms 1 1 1 2 2 3

En-suiteshowers 0 1 2 1 2 2

Torrent HP model THP150 THP180 THP210 THP250 THP300 THP450

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