Keston Spa 120 litre, Spa 150 litre, Spa 210 litre, Spa 300 litre, SpaTwin 210 Installation Instructions And Performance Specification

KESTON

SPA

UNVENTED

STORAGE

CYLINDERS

SINGLE ANDTWIN

COIL MODELS

lnsta

llation

lnstructions

&

Perfo

rma

nce

Specification

Fully Approved

To

Building

Regulations

G3 and

L

WRAS Approved

to

theWater Regulations

KESTON

BOILERS

LTD

34 WEST

COMMON

ROAD

HAYES,

BROMLEY

KENT BR2

7BX

Tel:(+44)

020 8462

0262

Fax(+44)

02084624459

Email: [e-mail]

Web: www.keston.co.uk

Single

Coil

Models

Spa 120

litre

Spa

150 litre

Spa

210 litre

Spa

300 litre

Twin

Coil

Models

SpaTwin

210

SpaTwin

300

lndirect

Stainless

Steel

Cylinders

with

Ultra-High

Performance

lssue

04-2007

Specialists

in high

Efficiency

Commercial

& Domestic

Heating

Equipment

READ

CAREFU

LLY

BEFORE

INSTALLATION

INCORRECT

INSTALLATION

MAY

INVALIDATE

GUARANTEE

CONTENTS

1.

Component

Check List

2.

Handling

and Storage

3. Location

and Cylinder

Mounting

4.

Warnings

5.

Markings

and

Specification

6.

Connection

Layout

and

Recommendations

for

Pipework

and

Discharge

Lines

7.

Flushing

and Commissioning

8.

Electrical

Specification

and

Wiring

g.

SecondaryCirculation

10.

Scale

Advice and

Maintenance

1 1.

Trouble

Shooting

and

Maintenance

12.

Spares

13.

Safety

&

Relevant

British

Standards

14.

Tank

Data Plate

Note

to

lnstaller:

Please leave

lnstallation

manual

with Householder

after installation

PAGE

3

4

4

4

5

6

9

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10

1',r

't2

13

't4

14

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INTRODUCTION

The Keston

Spa is

a range

of Duplex

stainless

steel

un-vented

water

heaters

with

ultra

high

performance

coils for

indirect

heating.The

use

of stainless

steel for

both

coil

and

iank

ensures

long

lifJ

and

high

strength

ensuring

high

pressure

performance.The

ultra high

efficiency

coils

give

rapid reheat

and high

volume

hot water

delivery.

The

units

are supplied

with manifold

type

pressure

regulating/expansion

relief

valves

preset

to

3bar

and

with

integral

strainer.

However,the

manifold

can be

separated

to tlvo

sections

should

you

wish

to install

the

pressure

regulating

valve at

a remote

location.

An

expansion

vessel

is also

suppliei

for

connection

to

the

cold

supply.

Use

of an

externat

expansion

vessel

allows

the

entire

volume

of ihe

tank

to be

used for

water

storage.

The units

are also

fitted

with a

3kW electric

immersion

heater

as standby

heating

and

adjustable

thermostat

with

overheat

shut down

to control

the

supply

of indirect

heat

to thl

unit.

EI

E

r

#

Operating Data:

Maximum

Water

Supply

Pressure

to

pressure

iegulating

ralve

Operating Pressure

of

unit

Expansion

Vessel

Charge

Pressure

Expansion

Relief

Valve

Setting

Maximum

Primary

Working

Pressure

Opening

Temperature

of T&P

Valve

Opening

Pressure

ofT&P

Valve

Performance

Data:

Model

Spa

Spa

i

Spa

Spa

't20

150

210

300

Re-heat

15C60C(approx)

23mins

25mins

35mins

44mins

lSmins

Re-heat

after 7006

draw-off

l Tmins

l Tmins

22 mins

2g

mins

1l

mins

(approx)

NB: Above

figures

assume

constant

primary

coil flow

of

82C and

sufficient

heat input

to fully

utilise

the coil

output.5paTwin

figures

assume

both

coils used

concurrently

with

sufficient

boiler

power

'1.

ComponentCheck-List

The following

items

accompany

your

Spa Unvented

Storage

Cylinder.

Combined

control and

overheat

thermostat

with

manual

cut-out

switch,

variable

thermostat

(30

-70C)

and

sensor.

90C/7

bar ?Temperature

and

Pressure

(T&P)

relief

valve

Discharge

tundish

2-Port Motorised

Valve

Expansion

vessel,

hose

and

wall mounting

kit

12.0

bar

3.0

bar

3.0 bar

6.0

bar

3.5 bar

90c

7 bar

Spa

Twin

Spa Twin

210

300

22mins

14 mins

Combined

strainer/pressure

reduction valve.3.0

bar,

with

stop

tap, check valve,expansion

relief valve

6

bar.

3kW

/230VAC electric

element

with

safety

cut-out

switch and

variable

thermostat -

1.75" BSP head

Diagnostic

gauge

M

ry

w

@

Lpanslon
wlthWall

Eracket

Ssndary ktum Circult

(21o,250&

300 Lilzes

Flexlble

Ho*

Enhanced
Cold Conn*tbn

Handling & Storage

-

Do not lift via valves

or element

bosses

on unit

-

Expansion vessels

must not

pe

dented.

-

Store unit away

from excess

heat or

frost

-

Always

transport

cylinders

in the

vertical

position

Location and Cylinder

Mounting

-

Site the

unit as close

as

possible

to

main

points

of usage.

Outlets above

the Spa

unit will reduce

the outlet

pressure

by 0.1 bar

for every

1m of height

difference.

-

Avoid

locating the unit

where

freezing temperatures

may be experienced.All

expose

pipework

should

be

insulated.

-

Ensure unrestricted

access to

plumbing

connections

and top

of expansion

vessel

-

Allow

sufficient

clearance

for

removal of

immersion

heater and

valves.

-

ln floor standing

the unit

place

the

unit on

a

load

bearing

surface

sufficient

for the

weight

of

the unit

when

full of

water.

-

The unit must be

installed and

transported

vertically unless

otherwise

indicated

on

packaging

-

Valves

can be

mounted

in any

orientation

provided

discharge

downpipes can

be run

to drain in accordance

with instructions

(seeTundish).The

discharge

pipework

should have a minimum

fall of

1:200 from the

unit.

-

A drainage safe

tray should

be

placed

under

the cylinder

to

facilitate servicing

Warnings

-

Boilers without thermostatic

control,such

as and steam

heating

plant

should

not be

used

with this unit unless

appropriate

additional

safety

controls

are installed.

Solid

fuel boiler must

not be used

with any

unvented

unit.

-

Under no circumstances

must.the

unit be

filled or operated

without

the

factory

fitted T&P relief valve.

I

-

Do not fit a stop or check

valve between

the inlet safety

group

and the cylinder

-

Do not

apply

heat

to any component

or any welding

to cylinder

or

pipe

connections.

-

All electrical

wiring should

be carried

out by

a registered

electrical

contractor

and

must conform to

IEE Wiring

Regulations.

-

lf a

replacement immersion

heater

is required at

any time,

do not

fit

an

immersion

heate(s)

without thermal

cut-out(s).

-

Ensure unit is

flushed for 3

minutes

via

hot tap before

switching

on.

-

Do not use

excessive

plumbers

paste

or

flux, which

may damage

the controls'

-

Do

not

swit{h on

power

until

the

unit is full of

water.

Do

not open electric

elements

unless

power

is switched

off.

-

Position discharge

tundish

away

from any electrical

components.

-

Do not allow

discharge

pipes

to

kink or block

in any

way.

goller

Boller

Return

Non
Return

Bonze
Pump

lmmttlon

[hter