Glow-worm Clearly Heat Pump User Manual

Buffer Vessel

Installation Instructions

60 litre

180 litre

Buffer Vessel

for

heat pump systems

www.glow-worm.co.uk

Guarantee Registration

Thank you for installing a new Glow-worm appliance in your home.

Glow-worm appliances are manufactured to the very highest standard so we are pleased to offer

our customers a Comprehensive Guarantee.

This product is guaranteed for 24 months from the date of installation or 30 months from the date

of manufacture, whichever is the shorter, for parts and labour.

The second year of the parts guarantee, from the beginning of the 13th month onwards after

installation or manufacture, is conditional upon the appliance having been serviced by an

approved, qualied installer,

in accordance with the manufacturer’s recommendations. We strongly recommend regular

servicing of your appliance, but where the condition is not met, any chargeable spare parts or

components issued within the applicable guarantee period still benet from a 12 month warranty

from the date of issue by the manufacturer.

We recommend you complete and return as soon as possible your guarantee registration card.

If your guarantee registration card is missing you can obtain a copy or record your registration by

telephoning the Glow-worm Customer Service number 01773 828100.

Customer Service:

01773 828100

Technical Helpline:

01773 828300

General and Sales enquiries:

Tel. [phone]

Fax: [phone]

To register your Glow-worm product call:

0800 0732142

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 manufacturer’s
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 Hotwater Industry Council who manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.

2

These instructions must be handed to the user on completion of the installation.

CONTENTS DESCRIPTION SECTION PAGE

Warnings 4

INTRODUCTION

Important Information 4
Statutory Requirements 5

INSTALLATION

TECHNICAL

SPECIFICATION

DISPOSAL

Installation 1 6

Technical Data 2 8

Disposal 3 9

3

WARNINGS

Metal Parts

This buffer vessel contains metal parts (components) and care should be taken when handling and cleaning,

with particular regard to edges.

Sealed Components

Under no circumstances must the user interfere with or adjust sealed parts.

Important Information

General

Further documents apply in combination with this installation
manual.
We accept no liability for any damage caused by failure to
observe these instructions.
Installation, commissioning and maintenance to the unit must
only be carried out by a competent person.

Control of Substances Hazardous to Health

Under Section 6 of The Health and Safety at Work Act
1974, we are required to provide information on substances
hazardous to health.
The adhesives and sealants used in this appliance are cured
and give no known hazard in this state.

Frost protection

The vessel must be completely drained if it is to be shut down
for a long period of time in an unheated room (winter holidays
etc), unless the heat pump circuit contains the necessary
amount of glycol antifreeze (available as a G-w accessory)

Documents

All installation manuals of the components of the installation
must be observed when installing a closed hot water central
heating system. These installation manuals are included
with the individual parts of the installation and the ancillary
components.
Please pass this installation manual on to the owner of the
system in order for him or her to store it so that it is available
whenever it is required.

Manual Handling

With regards to the “Manual Handling Operations, 1992
Regulations”, the product exceeds the recommended weight
for a one man lift.

4

Statutory Requirements

Testing and Certication

This buffer vessel is tested and certicated for safety and

performance. It is, therefore, important that no alteration is
made to the vessel, without permission, in writing, by Glow­worm.
Any alteration not approved by Glow-worm, could invalidate

the certication, warranty and may also infringe the current

issue of the statutory requirements.

CE Mark

The CE mark on the buffer vessel indicates that it complies
with the basic requirements of the applicable directives.

IMPORTANT

Where no British Standards exists, materials and equipment

should be t for their purpose and of suitable quality and

workmanship.
The installation of this buffer vessel must be carried out by a
competent person.
Manufacturer’s instructions must not be taken as overriding
statutory requirements.

Statutory Requirements

In GB, the installation of the buffer vessel must comply
with the requirements of the current issue of the following
regulations:

- Electricity at work act.

- Health and safety at work act

- Relevant Utility supplier’s regulations.

- Water regulations and by-laws.

- Environment agency and local council requirements
regarding bore holes, water courses, or noise levels.

- Gas safety installation and use regulations concerning

any associated gas red heat source used within the

heating system.

- Building regulations part “L” and directives concerning
energy saving

- Building regulations such as G3 covering Hygiene and L8
Legieonella.

- COSHH regulations

- Other relevant bodies such as HETAS and OFTEC

5

1 Installation

1.1 Description

The buffer vessel is fed with hot water from the heat source
and is used as intermediate storage for hot water that can be
used when required, by the heating circuit, see diagrams 1.1
and 1.2.
The buffer vessel is made of steel and is provided with a with
a mild steel outer casing .

180 Litre

A = to heating installation
B = from heating installation

NOTE: The vessel is intended for use on central heating

systems providing space heating. Provision for domestic hot
water supply via a heat exchanger or cylinder, must not be
connected to the outlet side of the vessel.

15508

Series connection

15509

A = to heating installation
B = from heating installation

Parallel connection

Diagram 1.1

6

60 Litre

1 Installation

A = to heating installation
B = from heating installation

Series connection

A = to heating installation
B = from heating installation

15506

Parallel connection

15507

1.2 Site requirements

IMPORTANT: To prevent frost damage to the buffer vessel

and damage caused by escaping water, do not install the
vessel in rooms that are liable to freezing.

Make sure that the oor is level and strong enough to support

the weight of the buffer vessel in its full condition (see Section
2, Technical Data).

Install the buffer vessel as close as possible to the heat pump,
to minimise heat losses. Choose the installation location so
that running and connecting the pipes is practicable. Lag all
the pipes with thermal insulation to prevent energy losses.

1.3 Clearances

When installing, make sure there is adequate clearance to the
walls, so that assembly and maintenance work can be carried
out.

1.4 Unpacking and installing the unit

The Glow-worm buffer vessel is delivered in a packing case
with a separate mini pallet for ease of handling.
The feet of the buffer vessel are secured to the pallet during
transit.

Diagram 1.2

Remove the bolts from the feet of the vessel and discard.

Transport the buffer vessel to its nal installation location.

Position the buffer vessel, always ensuring good access to
the hydraulic connections.

7

2 Technical Data

2.1 Identication plate

The identication plate is tted on the side of the outer

casing, please quote reference numbers when ordering spare
parts

2.4 Safety valves

NOTE: These buffers are tted with pressure relief valves as

standard, which are positioned within the casing and will have
to be connected to a suitable drain point where the units are

tted indoors.

2.2 Buffer vessel

The buffers are primarily intended for internal use.
The buffer vessel is available in two sizes
180 and 60l nominal capacity.

2.3 Technical Data

Description Units 60 litre 180 litre

Overall height mm 330 1284

Overall length mm 1190 754

Overall depth mm 500 633

Weight, unlled kg 53 95

Weight, lled kg 110 275

Vessel capacity l 60 180

Permissible operating pressure bar 3.0 3.0

Max. permissible temperature °C 95 95

Connection sizes (series) inches 2 x 1¼M 2 x 2”M

Connection sizes (parallel) Inches 2 x 1½ M 2 x 2½” M

Packaged dimensions mm 1198 x 568 x 486(h) 715 x 765 x 1419(h)

Packaged Weight kg 65 106

8

3 Disposal

3.1 Disposal

Both your Glow-worm buffer vessel and its associated
packaging consist mainly of recyclable raw materials.
The buffer vessel, nor any of its accessories, belong in the
household waste. Make sure the old unit and any accessories
are disposed of properly. The transport packaging will be
disposed of by your installer.

9

Because of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.

0020084995-02 06.09

Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT

www.high-efciency.info