Benchmark PulsaCoil 2000 Series User guide
DESIGN, INSTALLATION AND
SERVICING INSTRUCTIONS
PLEASE LEAVE THESE INSTRUCTIONS IN THE POCKET PROVIDED ON
THE BACK OF THE FRONT PANEL
ALL MODELS COMPLY WITH THE
WATER HEATER MANUFACTURERS
SPECIFICATION FOR THERMAL STORES
PULSACOIL 2000
PULSACOIL 2000
A MAINS PRESSURE HOT WATER SUPPLY
SYSTEM INCORPORATING AN OFF PEAK
ELECTRIC THERMAL STORE
Gas Council Approved Reference Numbers
PulsaCoil 125 97-317-31
PulsaCoil 145 97-317-32
PulsaCoil 185 97-317-33
PulsaCoil 215 97-317-34
PulsaCoil 235 97-317-35
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PULSACOIL 2000
CONTENTS
Section Page
1.0 DESIGN
1.1 Introduction 3
1.2 Technical Data 5
1.3 System Details 9
2.0 INSTALLATION
2.1 Site Requirements 13
2.2 Installation 14
2.3 Commissioning 18
3.0 SERVICING
3.1 Annual Servicing 20
3.2 Changing Components 20
3.3 Short Parts List 21
3.4 Fault Finding 22
Appendix A 24
Appendix B 25
Terms & Conditions 28
The Gledhill PulsaCoil range is a WBS
listed product and complies with the
WMA Specification for hot water only
thermal storage products. The principle
was developed originally in conjunction
with British Gas. This product is
manufactured under a BS EN ISO 9002
Quality System audited by BSI.
The Gledhill Group’s rst priority is to give a
high quality 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.
ISSUE 7: 01-03
As part of the industry wide “Benchmark” Initiative all Gledhill PulsaCoils now include
a Benchmark Installation, Commissioning and Service Record Log Book. Please
read carefully and complete all sections relevant to the appliance installation. The
details of the Log Book will be required in the event of any warranty work being
required. There is also a section to be completed after each regular service visit.
The completed Log Book and these instructions should be left in the pocket
provided on the back of the front panel.
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PULSACOIL 2000
1.0 DESIGN
1.1 INTRODUCTION
Any water distribution system/installation must
comply with the relevant recommendations
of the current version of the Regulations and
British Standards listed below:-
Building Regulations
Requirements for Electrical Installations
Water Regulations
Manual Handling Operations Regulations
British Standards
BS6700 and BS7671.
A competent person must install the PulsaCoil
domestic hot water system. The manufacturer’s
notes must not be taken as overriding statutory
obligations.
The PulsaCoil 2000 is not covered by section
G3 of the current Building Regulations and is
therefore not notiable to Building Control.
The information in this manual is provided to
assist generally in the selection of equipment.
The responsibility for the selection and
specication 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, selection
or specication or for the effectiveness of an
installation containing one of our products
unless we have been specifically requested
to do so.
All goods are sold subject to our Conditions
of Sale, which are set out at the rear of this
manual.
In the interest of continuously improving
the PulsaCoil range, Gledhill Water Storage
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.
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PULSACOIL 2000
The PulsaCoil 2000 shown schematically above is designed to provide an improved
method of supplying mains pressure hot water when used with a suitable off peak
electric supply/tariff.
The PC 125 model is only provided with one off peak immersion heater and it is only
recommended for use when an Economy 10 or Heatwise tariff is available - see model
selection guide on page 5 for details.
Because of the efciency of the appliance improved SAP ratings can be achieved. Further
details are available from the Gledhill Technical Department.
An important feature of the concept is that hot water can be supplied directly from the
mains at conventional ow rates without the need for temperature and pressure relief
safety valves or expansion vessels. This is achieved by passing the mains water through a
plate heat exchanger. The outlet temperature of the domestic hot water is maintained by
the Pump Speed Control (P.S.C.) board, which controls the speed of the pump circulating
the primary water from the store through the plate heat exchanger.
The PSC incorporates the facility to automatically run the D.H.W. primary pump for about
3 seconds every 30 hours to help prevent it sticking.
1.0 DESIGN
Description
1.1 INTRODUCTION
Because of the innovative method of hot
water production no in-line scale reducer
is normally required on the cold supply to
the appliance.
If scale should become a problem the
plate heat exchanger is easily isolated and
replaced with a service exchange unit.
* Note: The standard appliance is
supplied as a manual fill model i.e.
without a ballvalve and overow which
makes it particularly suitable for use
in flats/apartments. A ballvalve and
overflow fitting can be supplied as an
optional extra if required.
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PULSACOIL 2000
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1.2 TECHNICAL DATA
1.0 DESIGN
Notes:-
1. Plastic feed and expansion cistern will be supplied separately including ballvalve, oat and overow tting.
2. The ow rates are based on a 35°C temperature rise and assume normal pressure and adequate ow to the appliance. The actual
ow rate from the appliance is automatically regulated to a maximum of 28 litres/min.
3. Unit is supplied on a 100mm high installation base.
4. The domestic hot water outlet temperature is automatically regulated to approximately 55°C at the bath ow rate of 18 litres/min
recommended by BS 6700. The temperature is not user adjustable.
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PULSACOIL 2000
1.2 TECHNICAL DATA
Standard Equipment
The standard conguration of the PulsaCoil
2000 is shown opposite. The Pump Speed
Control Board (P.S.C.), mounted inside
the appliance, controls the operation of
the complete system. The P.S.C. is pre-
wired to a terminal strip where all electrical
connections terminate. It is supplied with
the following factory tted equipment:-
1. 3kW off-peak immersion heater with
rod thermostat
2. 3kW on-peak boost immersion heater
with rod thermostat
3. Pump Speed Control Board (P.S.C.)
4. Plate heat exchanger
5. Domestic hot water primary (plate
heat exchanger) pump
6. Commissioning Link (L1) - for dry re
protection
7. DHW temperature sensor
8. PHE return sensor
9. Overheat thermostat and reset
button
10. Strainer and ow regulator
11. Screwed connection for a drain tap
12. A feed and expansion cistern complete
with cold feed/open vent pipework
assembly is supplied separately.
Note : Both immersion heaters are low
watts density type with incaloy 825 sheaths
and are specially manufactured to suit
Thermal Stores. It is recommended that
any replacements should be obtained from
Gledhill Water Storage.
Optional Extra Equipment
• Flexible connectors for quick
connection to rst x pipe installation.
For further details see 2.2 Installation,
Pipework connections.
• Hot and cold water manifolds for use
with plastic pipework.
• Ballvalve/overow connector for
F & E cistern
1.0 DESIGN
Pump Speed
Control Board
P.S.C
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PULSACOIL 2000
1.0 DESIGN
1.2 TECHNICAL DATA
Note: The Appliance dimensions above do not allow for
the100mm high installation base
The following table of minimum cupboard dimensions only
allow the minimum space required for the appliance (including
the F & E cistern). Any extra space required for shelving etc in
the case of airing cupboards etc must be added.
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541CP mm0411 mm595 mm575
581CP mm0631 mm595 mm575
512CP mm0051 mm595 mm575
532CP mm0071 mm595 mm575
Note: The above dimensions are based on the Appliance
and the F & E cistern (tted with a ballvalve) being in the
same cupboard. If the manual ll method is chosen the
heights can be reduced by 125mm.
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521CP mm5671 mm007 mm006
541CP mm0981 mm007 mm006
581CP mm5102 mm007 mm006
512CP mm0522 mm007 mm006
532CP mm0542 mm007 mm006
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PULSACOIL 2000
1.0 DESIGN
1.2 TECHNICAL DATA
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PULSACOIL 2000
1.3 SYSTEM DETAILS
Hot and Cold Water System
General
A schematic layout of the hot and cold water services in a typical small dwelling is
shown below. PulsaCoil 2000 will operate at mains pressures as low as 1 bar and as
high as 5 bar although the recommended range is 2-3 bar. If the manifolds (available
as an optional extra) are being used the inlet pressure to the manifold must be
a minimum of 2 bar. It is also important to check that all other equipment and
components in the hot and cold water system are capable of accepting the mains
pressure available to the property. If the mains pressure can rise above 5 bar or the
maximum working pressure of any item of equipment or component to be tted in
the system, a pressure limiting (reducing) valve set to 3 bar will be required.
Note : Each Pulsacoil 2000 is tted with a strainer and ow regulator on the cold
mains supply connection. If the supply pressure is less than 2 bar or if the manifolds
(available as an optional extra) are being used or if all taps are provided with ow
regulators the ow regulator on the cold inlet should be removed.
No check valve or similar device should be tted on the cold water supply branch
to the PulsaCoil 2000.
Because of the innovative method of hot water production no scale reducer is
required on the branch to the appliance. However, to comply with the Benchmark
Guidance Note for Water Treatment in Heating and Hot Water Systems the installer
should check the hardness level of the water supply and if necessary t a scale reducer
to provide protection to the whole of the domestic water system.
The hot water ow rate from the PulsaCoil 2000 is directly related to the adequacy of
the cold water supply to the dwelling. This must be capable of providing for those
services, which could be required to be supplied simultaneously, and this maximum
demand should be calculated using procedures dened in BS 6700.
1.0 DESIGN
Note:
The diagram below shows the F & E
cistern
with ballvalve and warning/overflow pipe
which can be tted if required. However, the
standard preferred arrangement is for the
cistern to be manually lled from a temporary
hose connection tted with a double check
valve.
If a water meter is tted in the service pipe,
it should have a nominal rating to match the
maximum hot and cold water peak demands
calculated in accordance with BS 6700. This
could be up to 60ltr/min in some properties.
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PULSACOIL 2000
1.3 SYSTEM DETAILS
Hot and Cold Water System
Pipe Sizing / Materials
To achieve even distribution of the available supply of hot and cold water, it is
important in any mains pressure system, that the piping in a dwelling should be sized
in accordance with BS 6700. This is particularly important in a large property with
more than one bathroom.
However, the following rule of thumb guide lines should be adequate for most
smaller property types as long as water pressures are within the recommended
range of 2-3 bar.
1. A 15mm copper or equivalent external service may be sufficient for a
small 1bathroom dwelling (depending upon the flow rate available), but
the minimum recommended size for new dwellings is 22mm (25mm MDPE).
2. The internal cold feed from the main incoming stop tap to the PulsaCoil
should be run in 22mm pipe. The cold main and hot draw-off should also
be run in 22mm as far as the branch to the bath tap.
3. The final branches to the hand basins and sinks should be in 10mm and to
the baths and showers in 15mm. (1 metre minimum)
4. We would recommend that best results for a balanced system are
achieved by fitting appropriate flow regulators to each hot and cold
outlet. These MUST be fitted in cases where the final branch pipe sizes
are not as recommended in item 3 or water pressures are above the
recommended water pressure range of 2-3 bar. Details of suitable flow
regulators are provided in Appendix A.
Note: If manifolds (available as an optional extra) are being used suitable ow
regulators are automatically provided in the manifold and do not need to be
provided at each outlet. See Appendix B for further details.
All the recommendations with regard to pipework systems in this manual are generally
based on the use of BS/EN Standard copper pipework and ttings.
However, we are happy that plastic pipework systems can be used in place of copper
internally as long as the chosen system is recommended for use on domestic hot
and cold water systems by the manufacturer and is installed fully in accordance with
their recommendations.
This is particularly important in relation to use of push t connections when using the
optional exible hose kits - see 2.2 Installation, Pipework connections.
It is also essential that if an alternative pipework material/system is chosen the
manufacturer conrms that the design criteria of the new system is at least equivalent
to the use of BS/EN Standard copper pipework and ttings.
Taps/Shower Fittings
Aerated taps are recommended to prevent splashing.
Any type of shower mixing valve can be used as long as both the hot and cold supplies
are mains fed. However all mains pressure systems are subject to dynamic changes
particularly when other hot and cold taps/showers are opened and closed. To minimise
the impact of this we would always recommend the use of thermostatic showers
with this appliance.
The shower head provided must also be suitable for mains pressure supplies.
However, if it is proposed to use a ‘whole body’ or similar shower with a number of high
ow/pressure outlets please discuss with the Gledhill technical department.
The hot water supply to a shower-mixing valve should be fed wherever practical directly
from the PulsaCoil 2000 or be the rst draw-off point on the hot circuit. The cold
supply to a shower-mixing valve should wherever practical be fed directly from the
1.0 DESIGN
rising mains via an independent branch.
The shower must incorporate or be tted
with the necessary check valves to provide
back-syphonage protection in accordance
with the Water Regulations.
The supply of hot and cold mains water
directly to a bidet is permitted provided
that it is of the over-rim ushing type and
that a type ‘A’ air gap is incorporated.
Hot and Cold Water System
If the length of the hot water draw off
pipework is excessive and the delivery time
will be more than 60 seconds before hot
water is available at the tap, you may wish
to consider using trace heating to the hot
water pipework such as the Raychem HWAT
system. Please consult Gledhill Technical
Department for further details.
Note: A conventional pumped secondary
circulation system is NOT suitable for use
with this appliance.
It is important that the cold water pipework
is adequately separated/protected from
any heating/hot water pipework to ensure
that the water remains cold and of drinking
water quality.
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PULSACOIL 2000
1.0 DESIGN
1.3 SYSTEM DETAILS
Electrical Installation
The Schematic arrangement of the wiring
within the PulsaCoil 2000 is shown above.
The whole of the electrical installation shall
be designed and installed by a competent
person fully in accordance with the latest
edition of the Requirements for Electrical
installations BS 7671.
The PulsaCoil 2000 appliance is provided with
two side entry 3kW immersion heaters and
has been designed to generally operate with
an off peak supply.
The lower immersion heater heats the whole
of the contents and is normally connected to
the off peak supply.
PulsaCoil 2000 Schematic Wiring Diagram
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PULSACOIL 2000
1.0 DESIGN
1.3 SYSTEM DETAILS
Electrical Installation
The upper immersion heater is positioned at a level on the PulsaCoil 2000 to provide
sufcient hot water for at least one bath - see Technical Data Table on page 5. This
is connected to the unrestricted on peak supply and is normally switched manually
by the householder to provide a day time boost when required. Alternatively a time
clock could be wired into this supply to provide an automatic boost on a daily basis
if preferred.
NOTE: The PC 125 model is only supplied with a lower immersion heater.
The size of the appliance and the need to use the on peak boost facility is reduced if
a better off peak tariff can be agreed with the electrical supply company - see Model
Selection Guide on page 5.
A 3 amp supply is also required from the unrestricted on peak supply for the control
circuit.
Although the PulsaCoil 2000 appliance is primarily designed to operate with an off peak
supply it will also operate quite successfully if it is only supplied with an on peak supply.
However, this will substantially increase the running costs of the appliance and should
only be considered if an off peak supply is not available.
Note:
In addition to the supplies to the
immersion heaters, PulsaCoil 2000
requires a 3 amp supply for the control
circuit. This 3 amp supply must be
provided via a fused 3 amp double pole
isolator providing 3mm of separation
to both poles.
Two typical methods of providing electrical
supplies are shown below for information.
However, the PulsaCoil 2000 appliance is
suitable for use with any method of supply
- if unsure please consult Gledhill Technical
Department for further assistance.
If separate circuits are provided the two
switches must be clearly labelled for the
householders use.
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PULSACOIL 2000
2.0 INSTALLATION
2.1 SITE REQUIREMENTS
The appliance is designed to be installed in an airing/cylinder cupboard and the
relevant minimum dimensions are provided in section 1.2 Technical Data.
Because of the ease of installation we recommend that the cupboard construction
is completed and painted before installation of the appliance. The cupboard door
can be tted after installation.
If the unit needs to be stored prior to installation it should be stored upright in a dry
environment and on a level base/oor.
Installation and maintenance access is needed to the front of the appliance and
above the F & E cistern. See Section 1.2 Technical Data for further details.
The minimum dimensions contained in section 1.2 Technical Data allow for the
passage/connection of pipes to the appliance from any direction as long as the
appliance is installed on the installation base provided. If the installation base is not
used extra space may be needed to allow connection to the pipework and the whole
of the base area should be continuously supported on a material which will not easily
deteriorate if exposed to moisture.
The oor of the cupboard needs to be level and even and capable of supporting
the weight of the appliance when full. Details of the weight when full is provided
in section 1.2 Technical Data.
The appliance is designed to operate as quietly as practicable. However, some noise
(from pumps etc) is inevitable when hot water is being used. This will be most
noticeable if the cupboards are located adjacent to bedrooms, on bulkheads, or at
the mid span of a suspended floor.
Cupboard temperatures will normally be higher than in a conventional system and
the design of the cupboard and door will need to take this into account. No ventilation
is normally required to the cupboard.
The separate feed and expansion cistern will need to be located on top of the
appliance or at high level in the cupboard housing the PulsaCoil 2000. The dimensions
and clearances are provided in section 1.2 Technical Data. The location will need to
provide a suitable route for the cold feed and expansion pipe as well as the open
safety vent pipe. The location will also need to provide a suitable route and discharge
position for the warning/overow pipe and the ballvalve supply from the mains cold
water system (if provided).
Note: The standard appliance is supplied with a cistern without a ballvalve/
overow for lling manually.
An electrical supply must be available which is correctly earthed, polarized and in
accordance with the latest edition of the IEE requirements for electrical Installations
BS 7671.
The electrical mains supply needs to be 230V/50Hz.
The sizes/types of electrical supplies must be as detailed in 1.3 System Details,
Electrical Installation and the connections must be made using a double-pole linked
isolator with a contact separation of 3mm in both poles which are located within 1m
of the appliance. The supplies must only serve the appliance.
The hot and cold water ‘rst x’ pipework should be terminated 50mm above the
nished oor level in accordance with the dimensions provided in 1.2 Technical
Data.
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PULSACOIL 2000
2.2 INSTALLATION
2.0 INSTALLATION
HANDLING
When lifting the unit work with someone of similar build
and height if possible.
Choose one person to call the signals.
Lift from the hips at the same time, then raise the unit to
the desired level.
Move smoothly in unison.
Larger units may require a team lift.
Preparation/placing the appliance in position.
The ‘rst x’ pipework positions should be checked using the template provided with
each appliance. If these have been followed installation is very simple and much
quicker than any other system.
The appliance is supplied shrink wrapped on a timber installation base. Carrying
handles are also provided in the back of the casing.
The feed and expansion cistern complete with ballvalve, cold feed/expansion and
overow/warning pipe ttings are provided in a separate box.
If exible connections have been ordered these will also be inside the feed and expansion
cistern.
The appliance should be handled carefully to avoid damage and the recommended
method is shown above.
Note: Although the above guidance is provided any manual handling/lifting operations
will need to comply with the requirements of the Manual Handling Operations
Regulations issued by the H.S.E.
The appliance can be moved using a sack truck on the rear face although care should
be taken and the route should be even.
In apartment buildings containing a number of storeys we would recommend that the
appliances are moved vertically in a mechanical lift.
If it is proposed to use a crane expert advice should be obtained regarding the need
for slings, lifting beams etc.
Before installation the site requirements
should be checked and confirmed as
acceptable.
The plastic cover and protective wrapping
should be removed from the appliance and
the installation base (provided) placed in
position.
The appliance can then be lifted into
position in the cupboard on top of the base
and the front panel removed by unscrewing
the 2 screws and lifting the door up and out,
ready for connection of the pipework and
electrical supplies.
The feed and expansion cistern support
shall be installed ensuring that the base
is fully supported, the working head
of the appliance is not exceeded and
the recommended access is provided for
maintenance - see section 1.2 Technical Data
for details.
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PULSACOIL 2000
The position of the pipework connections is
shown opposite. The connection sizes and
dimensions are listed in Section 1.2 Technical
Data.
All the connections are also labelled on the
appliance. It is essential that the pipework is
connected to the correct connection.
The connections can be hard piped but we
recommend the use of exible connections
(available as an optional extra).
If using push t connectors with the exible
hose kits it is important to check that they
are compatible. Written approval has already
been obtained for:-
Hepworth - Hep2O BiTite
John Guest - Speedt
Yorkshire - Tectite
However, as similar assurances cannot be
obtained for Polypipe fittings we cannot
recommend their use.
Connections A, B and D are plain ended
copper pipe.
Connection C is a compression tting.
Connection E is RC ( in BSPT internal)
A - Safety open vent
B - Cold feed/expansion
C - Incoming mains cold water
D - Domestic hot water
E - Drain tap connection
2.0 INSTALLATION
2.2 INSTALLATION
Pipework connections
Note: The safety open vent and cold feed/
expansion should be connected to the
F & E cistern using the pipework assembly
provided.
All factory made joints should be checked
after installation in case they have been
loosened during transit.
The ttings for the feed and expansion cistern
should be installed following the instructions
provided by the manufacturer in a position
to suit the particular location and the cistern
tted on its supports/base.
The cold feed/expansion and safety open vent
should be installed between the appliance
and the feed and expansion cistern.
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PULSACOIL 2000
2.2 INSTALLATION
2.0 INSTALLATION
It is normally envisaged that the feed and
expansion cistern will be located in the same
cupboard as the PulsaCoil 2000 appliance
itself to maintain a dry roof space.
The cold feed/open vent pipework assembly
(as supplied) should be used if it is intended
to install the F & E cistern directly on top
of the appliance.
However, if it is necessary to locate the
cistern in the roof space (or on a higher
floor) the cold feed/open vent pipework
assembly (as supplied) should be used to
connect to the F & E cistern and pipework
site run by the installler to connect this to
the appliance.
Obviously, any pipework in the roof space
and the feed and expansion cistern will
need to be adequately insulated to protect
against frost damage.
Combined feed and open vent pipe
arrangements must not be used.
No valves should be fitted in the safety
open vent which must be a minimum of
22mm copper pipe or equivalent.
The mains cold water supply to the ballvalve
shall be provided with a suitable servicing
valve.
The overflow/warning pipe (if provided)
shall have a continuous fall, be fitted to
discharge clear of the building and be
sited so that any overflow can be easily
observed. It shall also be installed in a size
and material suitable for use with heating
feed and expansion cisterns in accordance
with BS 5449 (e.g 22mm copper) and should
not have any other connections to it.
Note: If a warning/overow pipe is NOT
provided the F & E cistern should be
lled from a temporary hose connection
supplied from any cold water tap or
from a permanent cold branch provided
adjacent to the F & E cistern. The
temporary hose must be fitted with a
double check valve and removed once
the appliance is lled.
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PULSACOIL 2000
WIRING DIAGRAM - STANDARD PULSACOIL 2000 APPLIANCE
2.0 INSTALLATION
2.2 INSTALLATION
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PULSACOIL 2000
2.2 INSTALLATION
Electrical Connection - Standard Appliance
The PulsaCoil 2000 is pre-wired to a 12 way
terminal strip from the A.C.B. and plumbers are
well able to complete the electrical installation
as long as they are competent to carry out
the work strictly in accordance with the IEE
Requirements for Electrical Installations BS
7671. The arrangement of the wiring is shown
on the previous page.
All the terminals are suitably labelled.
Note: Do not attempt the electrical work
unless you are competent to carry it out to
the above standards.
Before commencing check that the power
source is in accordance with section 2.1 Site
Requirements and ensure that it is isolated.
Run the external wiring from the adjacent
isolator through the service slot provided in
the base of the appliance.
Make the connections as shown opposite on
the terminal strip provided.
Clamp the cables in the grips provided below
the terminal strip and ensure all cables are
routed to avoid hot surfaces.
Note: The appliance pipework should be
bonded to earth to comply with the IEE
Requirements for Electrical Installations BS
7671.
The appliance is provided with a 4.0mm earth
cable from a strap on the case to the earth
stud on the wiring panel.
Before switching on the electrical supply check
all the factory made terminal connections to
ensure they have not become loose during
transit.
2.0 INSTALLATION
2.3 COMMISSIONING
Open the incoming stop valve and fill the
domestic mains cold and hot water systems
including the PulsaCoil 2000 appliance.
Check the water level in the feed and
expansion cistern and if a ballvalve is tted
adjust if necessary.
Check the whole of the domestic hot and cold
distribution systems for leaks.
NOTE: The three 230V, 50Hz supplies should be as shown in the
schematic diagram on page 12.
The PC 125 model is only supplied with the lower (off peak) immersion
heater.
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PULSACOIL 2000
2.3 COMMISSIONING
Fully ush and if necessary chlorinate the hot and cold water system in accordance
with the recommendations in the Water Regulations and BS 6700.
Once the system is nally lled turn down the servicing valve for the ballvalve
in the F & E cistern to the point where the warning/overow pipe will cope with
the discharge arising from a ballvalve failure.
If an overow is not provided ensure the temporary lling hose is isolated and
removed from its connection to the cold water supply.
It is essential that all systems function properly for optimum performance.
To achieve this the flow rate from each tap should be checked and a suitable
number of taps run simultaneously to check the impact of this on the ow rate
at individual taps.
We recommend that ow restrictors are provided for each tap/terminal tting
to ensure that the available ow is shared evenly - See Appendix A for further
details.
Commissioning the PulsaCoil Control System
Once the PulsaCoil 2000 is lled with water one end of the link (L1) can be removed
from terminal 12, inserted into terminal 11, and the electrical supplies switched on.
WARNING - Inserting this link into terminal 11 will complete the electrical control
circuit and allow a supply to the immersion heaters. DO NOT INSERT THIS LINK AND
SWITCH ON THE ELECTRICITY SUPPLY UNTIL YOU HAVE CHECKED THAT THERE
IS WATER IN THE F & E CISTERN . Failure to do this will result in dry ring and
premature failure of the immersion heaters.
The green indicating lamp on the front of the appliance will light to show the control
circuit supply is live.
The red indicating lamp will only light to indicate a fault condition, (See 3.4 Fault
Finding for further details).
Note: It will light initially if the electricity is switched on and the link has not been
moved from terminal 12 to terminal 11.
When the green indicating lamp is lit switch on the on-peak (top) immersion heater
and allow the appliance to reach temperature. Check that the rod thermostat
mounted in the on peak immersion heater has switched off at the correct temperature
of approx 72ºC.
When this has been proven isolate the incoming power supplies and remove the
incoming on and off peak supplies from the immersion heater supply terminals.
Temporarily reconnect the on peak supplies to the off peak terminals (numbers 8, 9)
and 10) and allow the appliance to reach temperature.
Check the rod thermostat has switched off the off peak immersion heater at the
correct temperature of approx 72ºC.
If the control thermostats do not switch off the immersion heaters at the correct
temperature the overheat thermostat will operate the manual reset button. In this
case check and adjust or replace the relevant rod thermostat and reset the overheat
button. Reduce the store temperature by running some hot water and repeat the test
relevant to the immersion heater/control thermostat concerned.
Once it has been proved that the control thermostats are working correctly isolate
the incoming power supplies and re-connect the immersion heater supplies in
accordance with the details in 2.2 Installation.
2.0 INSTALLATION
Run a tap and using a digital thermometer
check that the temperature of the hot water
is about 55°C. This temperature is factory set
and is independent of the store temperature
and hot water ow rates.
This product is covered by the ‘Benchmark’
scheme and a separate commissioning/
service log book is included with this
product. This must be completed during
commissioning and left with the product
to meet the Warranty conditions offered
by Gledhill.
Important Do’s and Don’ts
1. DO check the incoming mains water
pressure. The preferred range of mains
pressure is 2 -3 bar.
2. DO check the ow rate of the incoming
cold water main is adequate to meet
the maximum hot and cold water
simultaneous demands.
3. DO check that all connections are in
accordance with the labelling on the
thermal store.
4. DO NOT insert link (L1) and switch on the
electricity supply until you have checked
that the appliance is full of water i.e. there
is water in the F & E cistern.
5. DO check the water level is correctly set in
the F & E cistern when cold and that there
is no overow when the appliance is up
to temperature.
6. DO check that the rod thermostats switch
the immersion heaters on/off at the correct
set points i.e. approx 72°C.
7. DO insulate any exposed hot water
pipework in the PulsaCoil cupboard.
8. If the ballvalve in the F & E cistern is
permanently connected to the mains
cold water supply DO plumb the overow/
warning pipe in a 20mm internal diameter
pipe and ensure it discharges in a
conspicuous external position. Use a
material which is suitable for use with
heating F & E cisterns in accordance with
BS 5449 (such as copper).
9. DO ensure the green light is ‘on’ and the
red fault light is off.
10. DO ensure that the functioning and
control of the system is explained to the
occupant.
These instructions should be placed
along with the component manufacturers
instructions in the pocket provided on the
rear of the front panel. The front panel
should then be retted.
Page 20
Page 21
PULSACOIL 2000
3.1 ANNUAL SERVICING
No annual servicing of the PulsaCoil 2000
is necessary.
However, if required, the operation of the
controls and a hot water performance test
can be carried out to prove the appliance
is working satisfactorily and within its
specication.
Free of charge replacements for any faulty
components are available from Gledhill
during the in-warranty period on return of
the faulty part (normally 12 months).
After this, spares can be obtained direct
from Gledhill using the ‘Speed Spares’
service, or through any of the larger
plumbers merchants/specialist heating
spares suppliers.
Help and advice is also available from the
Technical Helpline on 01253 474401.
However, all components are readily
accessible and can be changed quickly and
easily by the installer using common plumbing
practice.
If it is necessary to replace the pump tted to
the appliance the pump head (motor pack)
only should be removed as recommended
by Grundfos. Assuming it is within warranty
this will be accepted by a merchant as
being covered by the Grundfos national
service exchange agreement, as long as
it is a complete pump i.e. alleged faulty
motor pack and new base is left with the
merchant. It is important when a pump
has been replaced to ensure that any air
is adequately vented and the pump is set
on speed 3.
3.0 SERVICING
3.2 CHANGING
COMPONENTS
This manual suits for next models
5
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