Keston q-Spa Installation Instruction

Single Coil Models

q-Spa 120 litre
q-Spa 150 litre
q-Spa 210 litre
q-Spa 300 litre

Twin Coil Models

q-SpaTwin 210
q-SpaTwin 300

Indirect
Stainless Steel
Cylinders with

Ultra-High

Performance

KESTON q-Spa

UNVENTED STORAGE CYLINDERS

SINGLE AND TWIN COIL MODELS

Installation Instructions

&

Performance Specification

Tel:[phone]
Fax: [phone]
Email: [e-mail]

Web: www.keston.co.uk

Issue 04-2007Fully Approved To Building Regulations G3 and L

WRAS Approved to the Water Regulations

KESTON BOILERS LTD
34 WEST COMMON ROAD
HAYES, BROMLEY
KENT BR2 7BX

Specialists in high

Efficiency Commercial

& Domestic Heating

Equipment

KESTON q-Spa UNVENTED CALORIFIER

Manufacturer Keston Boilers Ltd, 34 West Common Road,Hayes,

Bromley,Kent BR2 7BX UK

Tel:[phone], Fax:[phone]

E: [e-mail] www.keston.co.uk

SERIAL NUMBER:

Number of heat exchangers 2

Mass Full kg

Weight of store (empty) kg

Dimensions of store (without insulation) 450mm x 1231mm

Max. supply pressure 12 bar

Expansion valve setting 6 bar

Expansion vessel charge 3 bar

Max. working pressure secondary 6.0 bar

Max. working pressure Upper Coil 3.5 bar

Max. working pressure Lower Coil 3.5 bar

Total net fluid content of secondary litres

Fluid content of Upper Coil litres

Fluid content of Lower Coil litres

Secondary volume heated by Upper Coil litres

Area Upper coil sq.m Area Lower Coil sq.m

Secondary volume heated by Lower Coil

Immersion Heater 3kW / 230VAC / 50Hz BS EN 60730-2-1

WARNING TO USER

i. Do not remove or adjust any component part or this unvented

water heater.Contact the installer.

ii. If this unvented water heater develops a fault, such as a flow of

hot water from the discharge pipe, switch the heater off and

contact the installer.

WARNING TO THE INSTALLER

i. This installation is subject to building regulation approval, notify

the Local Authority of intention to install.

ii. Use only manufacturers replacement parts.

Completion Date

THIS UNIT WAS INSTALLED BY:

ADDRESS:

TEL:

KESTON q-Spa UNVENTED CALORIFIER

Manufacturer Keston Boilers Ltd, 34 West Common Road,Hayes,

Bromley,Kent BR2 7BX UK

Tel:[phone], Fax:[phone]

E: [e-mail] www.keston.co.uk

SERIAL NUMBER:

Storage Capacity litres

Mass Full kg

Max. Supply Pressure 12 bar

Expansion Vessel Charge 3 bar

Expansion Valve Setting 6 bar

Max. Primary Pressure 3.5 bar

Operating Pressure 3 bar

Immersion Heater 3kW / 230VAC / 50Hz BS EN 60730-2-1

WARNING TO USER

i. Do not remove or adjust any component part or this unvented

water heater.Contact the installer.

ii. If this unvented water heater develops a fault, such as a flow of

hot water from the discharge pipe, switch the heater off and

contact the installer.

WARNING TO THE INSTALLER

i. This installation is subject to building regulation approval, notify

the Local Authority of intention to install.

ii. Use only manufacturers replacement parts.

Completion Date

THIS UNIT WAS INSTALLED BY:

ADDRESS:

TEL:

Keston Manual Phase 5 1/5/07 08:41 Page 1

INTRODUCTION

READ CAREFULLY BEFORE INSTALLATION

INCORRECT INSTALLATION MAY INVALIDATE GUARANTEE

CONTENTS PAGE

1. Component Check List 3

2. Handling and Storage 4

3. Location and Cylinder Mounting 4

4. Warnings 4

5. Markings and Specification 5

6. Connection Layout and Recommendations for 7
Pipework and Discharge Lines

7. Flushing and Commissioning 9

8. Electrical Specification and Wiring 10

9. Secondary Circulation 10

10. Scale Advice and Maintenance 11

11. Trouble Shooting and Maintenance 11

12. Spares 12

13. Safety & Relevant British Standards 12

14. Tank Data Plate 12

Note to Installer: Please leave Installation manual with Householder after installation

The Keston q-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 tank ensures long life
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 two sections should you wish to install
the pressure regulating valve at a remote location. An expansion vessel is also supplied for connection to
the cold supply. Use of an external expansion vessel allows the entire volume of the 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 the unit.

Operating Data:

Performance Data:

NB: Above figures assume constant primary coil flow of 82C and sufficient heat input to fully utilise

the coil output. q-SpaTwin figures assume both coils used concurrently with sufficient boiler power

1. Component Check-List
The following items accompany your q-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

Combined strainer/pressure
reduction valve, 3.0 bar, with stop
tap, check valve, expansion relief valve

3kW /230 VAC electric element with safety

cut-out switch and variable thermostat -

1.75” BSP head

Diagnostic gauge

Expansion vessel, hose and
wall mounting kit

3

Maximum Water Supply Pressure to pressure regulating valve

Operating Pressure of unit

Expansion Vessel Charge Pressure

Expansion Relief Valve Setting

Maximum Primary Working Pressure

Opening Temperature of T&P Valve

Opening Pressure of T&P Valve

12.0 bar

3.0 bar

3.0 bar

6.0 bar

3.5 bar

90C

7 bar

Model q-Spa q-Spa q-Spa q-Spa q-Spa Twin q-Spa Twin

120 150 210 300 210 300

Re-heat 15C 60C (approx) 23mins 25mins 35mins 44mins 18mins 22mins

Re-heat after 70% draw-off 17mins 17mins 22 mins 28 mins 11 mins 14 mins
(approx)

Keston Manual Phase 5 1/5/07 08:42 Page 3