Keston Spa Installation Manual download pdf (Page 3)

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

@

1 2 3 4 5 6 7 8 ... 11 12

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