PulsaCoil III

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A mains pressure hot water supply system incorporating an off peak electric thermal store.

Design, Installation and Servicing Instructions

 

 

PLEASE LEAVE THESE INSTRUCTIONS ADJACENT TO THE APPLIANCE. 

 

 

 CONTENTS

Issue 6: 01/01

GLEDHILL PULSACOIL III
SPECIFICATION

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SL	Details
1	DESCRIPTION
2	SYSTEM DESIGN
3	INSTALLATION
4	COMMISSIONING
5	FAULT DIAGNOSTICS
6	SHORT PARTS LIST
7	APPENDIX
8	SALES & WARRANTY TERMS

 

Any water distribution systems must be in accordance with the requirements of the regulations and should comply with the relevant recommendations of the British Standards listed below:-

Regulations

• Building Regulations
• Requirements for Electrical Installations BS 7671
• Water Regulations

British Standards

• BS 6700
• BS 7671

The plumbing and electrical work associated with this appliance shall be installed by suitably competent persons. The manufacturer’s notes must not be taken as over-riding statutory obligations.

The PulsaCoil III is not covered by section G3 of the1985 Building Regulations and is therefore not notifiable to Building Control.

Although the domestic water supply to the PulsaCoil III is at mains pressure, it is not necessary to fit an expansion vessel, pressure or temperature relief valve.

The information in this manual is provided to assist generally in the selection of equipment. The responsibility for the selection and specification of our equipment must however remain that of our 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 specification for the effectiveness of an installation containing one of our products.

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 III 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.

The Gledhill PulsaCoil range is a WBS listed product.

THIS PRODUCT IS MANUFACTURED UNDER A BS EN ISO 9002 QUALITY SYSTEM AUDITED BY BSI.

DESCRIPTION

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INTRODUCTION

The PulsaCoil III based hot water supply system is shown schematically in Figure 1.1. The PulsaCoil III appliance utilizes an off peak electrically heated thermal store with integral feed and expansion cistern to produce primary hot water. This is then circulated by a pump through a plate heat exchanger to instantaneously heat mains pressure domestic cold water. This allows mains pressure domestic hot water to be provided to the taps at high flow rates without the need for any temperature and pressure relief safety valves or expansion vessels. The actual temperature of the domestic hot water is maintained at the pre-set level by a printed circuit board which controls the speed of the pump circulating the primary hot water from the store through the plate heat exchanger.

THERMAL STORE

The thermal store and the top up cistern are constructed of copper. The thermal store is manually filled with mains cold water through the feed and expansion cistern. It should be filled up to the level of the swage mark in the cistern.

The thermal store is efficiently insulated with Rockwool CFC free insulation and finished in a painted steel case to minimise standing losses. The primary water in the store is heated to a temperature of approximately 77oC by the immersion heaters.

DOMESTIC HOT WATER
Cold Water Supply

The PulsaCoil III units are designed to be fed directly from the mains water supply as shown schematically in Figure 1.1. They fulfil the requirements of Water Bylaw 91, and therefore do not require a check valve to be fitted to the supply pipe. The performance of the PulsaCoil 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 defined in BS 6700. PulsaCoil will operate at mains pressures as low as 1 bar and this must be available when the local demand is at its maximum, but the preferred range is between 2 and 3 bar. As a general guideline, although a 15mm external service may be sufficient for smaller dwellings with one bathroom, a 22mm service (25mm MDPE) is preferred and should be the minimum for larger dwellings. If a water meter is fitted in the service pipe, it should have a nominal rating to match the maximum hot and cold water peak demand calculated in accordance with BS 6700. This could be up to 50 litres/min in some properties.

The unit must be fitted strictly in accordance with the requirements of the Local Water Undertaking who should be consulted prior to the installation. In the event of any difficulty please contact us as the manufacturers. The equipment used in the system should be suitable for a working pressure of 8 bar and approved by the WBS or other relevant standard. If this is not the case a pressure limiting valve will be required which is suitable for the item of equipment with the lowest maximum working pressure.

DESCRIPTION

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Safety Fittings

It is not necessary to fit control and safety equipment normally associated with mains pressure hot water storage appliances e.g. temperature and pressure relief valves and expansion vessel. PulsaCoil is WBS listed and a non-return valve is not required. However if the ancillary equipment fitted in the supply to these appliances require a non-return valve then the valve must be fitted directly after the branch to the drinking water i.e. a kitchen sink as shown schematically in Figure 1.1.

Domestic Hot Water Flow Rates

Provided the pipe sizing and the supply pressure is adequate the hot water flow rate should be up to 35 litres/ min for all models (see Table 1.1). The domestic hot water outlet temperature is regulated to 55oC by the electronic control system and is not user adjustable.

Use in Hard Water Areas

There are two options for the pump speed control. Option ‘H’ must be used in hard water areas above 200ppm. Option ‘S’ can be used in soft water areas below 200ppm.

A patented control system within the Option ‘H’ microprocessor offers a more sophisticated level of pump speed control and will help prevent the formation of scale.

Both options (‘H’ and ‘S’) prevent domestic hot water from exceeding 550C for most of the operational times of the appliance.

It is not necessary to fit any form of scale inhibiting equipment in the domestic cold water supply to the PulsaCoil when using option ‘H’.

If scale should however become a problem the plate heat exchanger is easily isolated and can be replaced with a service exchange unit.

DESCRIPTION

STANDARD EQUIPMENT

The standard configuration of the PulsaCoil III is shown in Figure 1.2. It is supplied as a complete factory made and tested appliance fitted with all the following items of equipment :-

- Grundfos UPS pump for domestic hot water primary circuit.
- Domestic hot water temperature controls and PCB.
- 2 x 3 kW low watts density Incaloy immersion heaters.
- Domestic hot water plate heat exchanger.
- Domestic hot water mixing valve.
- Float switch for ‘Dry Firing’ protection.
- Overheat protection.
- Wiring centre.
- System status display.

OPTIONAL EQUIPMENT

a) The appliance is supplied with the components on the right hand side (as shown in Figure 1.2) as standard but can be supplied left handed.
b) A 22mm diameter warning pipe/overflow connection. Any options must be clearly specified at the time of order or a standard model will be supplied.

DESCRIPTION

ELECTRIC IMMERSION HEATERS

The immersion heaters used are 14” 3kW low watts density units with incaloy 825 immersion sheaths, and matching 11” rod thermostats which should be set to 770C. They are BEAB approved and have been chosen to meet the requirements of the Maxistore specification produced specially for Ecomony 7 products by the Electricity Industry.

It is recommended that replacements should be obtained only from Gledhill Water Storage.

Table 1.1 Technical Specification of PulsaCoil III

MODEL	PC144	PC190	PC210	PC245
Overall dimensions of store (Height x Diameter)	1650 x 525	1840 x 550	1840 x 575	1960 x 575
Minimum cupboard size (Width x Depth)	700 x 550	715 x 600	750 x 650	750 x 650
Nominal store capacity (litres)	160	205	230	250
Weight (kg)
• Empty	39	41	46	52
• Full	199	246	276	302
Hot water flow rate (litres/min)	35	35	35	35
Typical dwelling types
• Bedrooms	1-2	2-3	2 - 3	2 - 4
• Bathrooms	1	1	1	2
• En-suite shower rooms	1	1	2	1

NOTES

1. The PC245 model can be installed in a property with greater hot water demand. However this will require more ‘ON peak’ electricity to recharge the store.
2. The standard pattern is manual fill. If automatic fill patterns are required please speak to our Technical Sales Office.
3. The flow rates are for 350C average temperature rise and assume normal pressure and adequate flow to the appliance.
4. For hard water areas use suffix ‘H’, for soft water areas use suffix ‘S’ after the model number, e.g. PC144H = PulsaCoil mk III model 144 for hard water areas.
5. A minimum of 200mm should be available above the appliance to allow it to be filled and the water level checked.

SYSTEM DESIGN

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HOT AND COLD WATER SERVICES

A schematic layout of the hot and cold water services in a typical small dwelling is shown in Figure 2.1.

PulsaCoil III will operate at mains pressures as low as 1 bar and as high as 8 bar although the preferred range is 2-3 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 the maximum working pressure of any items of equipment or component to be fitted a suitable pressure limiting (reducing) valve will be required.

For properties with a higher supply pressure than 8 bar it is recommended that a pressure limiting valve is fitted, set at 3 bar.

PulsaCoil III is WBS approved. A non-return valve is not required. Should ancillary equipment fitted in the supply to the PulsaCoil require a non-return valve, then this valve must be fitted directly after the branch to the drinking water tap (kitchen sink). See Figure 1.1 for details.

Note: The hot and cold water distribution pipework should be designed and installed to prevent heating of the cold distribution pipe.

Taps and Valves
Aerated taps are recommended for all mains pressure systems to prevent splashing.

Pipe Sizing
To achieve even distribution of the available supply of hot and cold water, it is important in any mains pressure system that the distribution pipes in a dwelling should be sized in accordance with BS6700. This is particularly important in a large property or one with more than one bathroom. However the following rule of thumb guide lines should be adequate for most typical property types:

a) A 15mm copper or equivalent external service may be sufficient for smaller 1 bathroom dwellings (depending upon the flow rate available), but the minimum size for larger dwellings must be 22mm (25mm MDPE).

b) The internal cold feed from the main stop tap to the PulsaCoil should be run in 22mm pipe. The hot draw off should also be run in 22mm as far as the branch to the bath tap.

c) The final branches to the hand basins and sinks should be in 10mm and to the shower in 15mm.

d) The final branches to taps in existing properties, which are in 15mm, should be restricted to balance the flow to each outlet.

e) Best results for a balanced system are achieved by fitting appropriate flow regulators to each hot and cold outlet (see Appendix 1).

f) For properties where the inlet pressure is high and the flow rates may exceed 30 l/min at any bath hot tap the installer must fit a lockshield pattern gate valve at the cold inlet to the appliance. This should then be adjusted to restrict the maximum flow rate to 30 l/min.

On the odd occasion it is felt necessary to provide a secondary circulation. We would recommend the use of Raychem HWAT Plus or similar self regulating trace heating to maintain the temperature in the hot water distribution system. The system must be installed and commissioned fully in accordance with the manufacturers instructions.

Showers
a) Any type of shower mixing valve can be used as long as both the hot and cold supplies are mains fed. However PRESSURE COMPENSATING shower mixing valves are proven to give better control when more than one fitting are open simultaneously and are therefore STRONGLY RECOMMENDED. Thermostatic versions are preferable.

b) The hot water supply to a shower mixing valve should, wherever practical, be fed directly from the PulsaCoil III or be the first draw-off point on the hot circuit.

c) The cold supply to a shower mixing valve should be fed directly from the rising mains via an independent branch.

d) Fixed head type showers: No back-syphonage arrangements are necessary.

e) Loose or flexible head type showers: If a loose head shower with a flexible hose is used over a bath then: -

• The hose must be fixed so that the head cannot fall closer than 25mm above the top edge of the bath as specified in Model Byelaw 16 of the Water Supply Byelaws.
• The shower must incorporate or be fitted with an acceptable means of back-syphonage protection in accordance with the Model Water Byelaws.

Bidets
a) The supply of hot and cold mains water directly to a bidet is permitted provided that it is of the over-rim flushing type and that a type ‘A’ air gap is incorporated.

b) It must not include either an ascending spray or provision to attach a hand spray.

SYSTEM DESIGN

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Plastic Pipework
This appliance is suitable for use with plastic pipework as long as the material is recommended for the purpose by the manufacturer and is installed fully in accordance with their recommendations.

We recommend the use of barrier pipe, which will mean the system can have BritishGas service cover in regions offering this service.

WIRING THE SYSTEM

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The whole of the electrical installation shall be designed by a competent person fully in accordance with the latest edition of the Requirements for Electrical Installations BS 7671.

However, the following guidance is provided to show the general principles involved.

The PulsaCoil III appliance is provided with two side entry immersion heaters. The lower element is connected to the off peak supply and enables the whole of the contents to be heated overnight using a low cost tariff.

The upper element is connected to the unrestricted supply and enables the upper part of the contents to be given a day time boost. This is switched manually or by a timer and uses the standard tariff. In some areas the local electricity company allows a limited day time off peak boost.

It is normal to supply the PulsaCoil III using an Economy 7 controller as shown in Figure 2.2.

Alternatively the PulsaCoil III can be supplied from separate circuits as shown in Figure 2.3. In this case the two switches should be clearly labelled for the householders use.

In addition to the supplies to the immersion heaters, PulsaCoil III 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.

SYSTEM DESIGN

In addition to the supplies to the immersion heaters, PulsaCoil III 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.

INSTALLATION

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INSTALLATION INSTRUCTIONS

Important Notes

It is important that the appliance is installed on a level and even floor or if raised above the base should be continuosly supported. If the support is timber, it shall be marine ply, type C4 chipboard to B.S.5669 or other material which will not deteriorate if exposed to moisture. Details of the appliance weight when full is provided in Table 1.1 of technical specifications.

Plumbing Connections

 a) Before installation it should be confirmed that a minimum 1 bar mains water pressure under flow conditions is available.

b) Make all water connections in accordance with the labelling on the thermal store and the associated pipework as shown in Figure 3.1.

c) Install the domestic hot and cold water pipework generally as described under System Design and as shown in Figure 1.1.

d) All factory made joints should be checked after installation in case they have been loosened during transit.

e) Ensure that the DHW pipework is run such that it does not heat the cold water distribution pipes in the dwelling.

THERMAL STORE FEED AND EXPANSION CISTERN

It is most important to fill with cold water so that the water level is in line with the mark on the inside of the feed and expansion cistern. This allows adequate room for expansion.

Overflow/Warning Pipe (if fitted)

a) The overflow warning pipe should be fitted to discharge clear of the building and be sited so that any overflow can be easily observed.

b) The overflow/warning pipe should be installed in a material suitable for use with heating feed and expansion cisterns in accordance with BS5449 (such as copper) and should not have any other connections to it.

PUMP SETTINGS/ REPLACEMENT

The domestic hot water plate heat exchanger pump should always be set at maximum speed.

If it is necesary to replace the pump fitted to the appliance the pump head (motor pack) only should be removed as recommended by the manufacturer (Grundfos). Assuming it is within warranty this will be accepted by a merchant as being under warranty as long as 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

DOMESTIC HOT WATER TEMPERATURE

The electronic system automatically regulates the domestic hot water outlet temperature to 55oC and no adjustment or setting is necessary during installation.

CUPBOARD DETAILS

a) Minimum cupboard sizes are shown in Table 1.1 and it is important to check that these are available prior to installation.

b) It is recommended that any surface mounted heating and hot and cold water supply pipework in the PulsaCoil III cupboard must be insulated to reduce the standing losses and to prevent unnecessarily high cupboard temperatures. More heat is lost from the first metre of pipework connected to the store than from the store.

NOTE: It is a requirement of Part L of the Building Regulations that all hot water pipework within 1 metre of a hot water appliance is insulated.

c) Notwithstanding the above, the cupboard temperatures are normally higher than in a conventional system and therefore the design of both the cupboard and the door should take this into account.

INSTALLATION

WIRING THE APPLIANCE

The whole of the electrical installation shall be installed by a competent person fully in accordance with the latest edition of the Requirements for Electrical Installations BS 7671.

The PulsaCoil III is pre-wired back to a wiring center (see Figure 3.2) and a plumber should be able to connect the appliance provided they adhere strictly to the recommendations and the IEE Regulations. However, do not attempt the electrical work unless you are competent to carry it out to these standards.

Before commencing, ensure that all the power sources to which the PulsaCoil III is to be connected are isolated and properly earthed.

See Figure 3.2 for details of the wiring within the appliance.

Connect the external wiring as follows

1. Remove the white cover plate (4 screws) and run the external wiring through the grommets provided in the fixed white panel at the base of the appliance.

2. From the 3A fused and switched connection, wire the mains power supply to the control circuit terminal block as follows:-

• Live to terminal 1
• Neutral to terminal
• Earth to terminal 3

3. From the Ecomony 7 controller (or separate 20A fuse and switch connections), wire the mains power supply to the immersion heater terminal block as follows:-

• Unrestricted (on peak) live to terminal 5 (L1)
• Unrestricted neutral to terminal 6
• Unrestricted earth to terminal 7
• Off peak live to terminal 8 (L2)
• Off peak neutral to terminal 9
• Off peak earth to terminal 10

4. When the wiring is complete replace the front white cover plate (4 screws).

COMMISSIONING

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COMMISSIONING

It is essential that the operation and performance of the appliance and the domestic water systems are proven on completion of the installation.

COMMISSIONING THE DOMESTIC WATER SYSTEMS

The system shall be filled, flushed and sterilised in accordance with the requirements of BS 6700 and the Model Water Byelaws.

The flow rate from each tap shall also be checked and a suitable number of taps run simultaneously to check the impact of this on the flow rate at individual taps.

We do recommend that flow restrictors are provided on the branch to each tap/terminal fitting to ensure that the available flow is shared evenly - see Appendix for details.

COMMISSIONING THE APPLIANCE

The PulsaCoil III shall be filled with mains cold water through the F and E cistern lid until the level is in line with the swage mark provided in the cistern. The lid shall be replaced.

Once the PulsaCoil III is filled with water the electrical supplies can be switched on.

The control panel on the front of the appliance is provided with two green indicator lights and a reset button as follows:-

Green light No.1 is linked to the flow switch and should be ‘on’ to show there is sufficient water in the F and E cistern.

Green light No.2 is linked to the overheat thermostat and should be ‘on’ to indicate the system is functioning correctly.

The overheat button should be ‘pressed in’.

If this is the case the immersion heaters should be allowed to bring the contents up to temperature. Check that the thermostats do switch off at the correct temperature of 770C. If not the seal can be broken and the setting adjusted without affecting the warranty.

If the thermostats do not switch off the immersion heaters at the correct temperature the overheat thermostat will operate the overheat manual reset button. In this case check and adjust the immersion heater thermostats or replace if necessary and reset the overheat button.

Once the immersion heaters have switched off run a tap and check that the temperature of the hot water is about 550C. This temperature is factory set and is independent of the store temperature and hot water flow rates.

IMPORTANT DO’S AND DON’TS

a) DO check the incoming mains water pressure. The preferred range of mains pressure is 2 – 3 bar.

b) DO check the flow rate of the incoming cold water main is adequate to meet the maximum hot and cold water simultaneous demands.

c) DO check that all connections are in accordance with the labelling on the thermal store.

d) DO check the water level is correctly set in the F & E cistern when cold and adjust if necessary.

e) DO ensure that the immersion heater thermostats are set to 77oC.

f) DO insulate any exposed pipework in the PulsaCoil cupboard.

g) If provided DO plumb the overflow/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).

h) DO ensure the 2 green lights are ‘on’ and the manual overheat reset button is pushed in.

 

FAULT FINDING/DIAGNOSTICS

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FAULT DIAGNOSTICS

The control panel on the front of the appliance is provided with 2 green indicator lights and a manual reset button.

These are provided to indicate the following:-
GREEN LIGHT NO.1

Will sense the water level within the F & E cistern and will prevent the immersion heaters from being switched ‘ON’ when the unit is not full of water.

Green light No.1 will remain ‘ON’ to indicate that the system is functioning correctly and is filled with water to the correct level. If both Green lights 1 & 2 are ‘OFF’ check the water level in the F & E cistern. If the water level is correct check the unit is switched ‘ON’.

FAULT FINDING

 

FAULT CONDITION	POSSIBLE CAUSES
DHW temperature remains cold exiting the taps.	Thermal store is cold - DHW pump is stuck - DHW temperature sensor or pump speed control PCB is faulty - too little or too much flow from the pipe.
DHW temperature fluctuates wildly when flow is steady.	DHW pump keeps sticking when voltage is reduced and not starting until voltage is too high.
DHW temperature exceeds and remains well above 60oC when the flow rate is low.	DHW pump speed control PCB and/or temperature sensor is/are faulty.

GREEN LIGHT NO.2 & MANUAL RESET BUTTON

Will provide overheat protection to prevent the stored water from boiling in the event of immersion heater thermostat failure. Green light No.2 will remain ‘ON’ to indicate that the system is functioning correctly. If Green light No.2 is ‘OFF’ check the manual reset button on the overheat thermostat. If the overheat button has popped out check and replace as necessary the immersion heater thermostats. The thermostats must be set at 770C. Manually press the reset button on the overheat thermostat to reset the appliance.

FAULT FINDINGS

FAULT FINDING

A number of the DHW faults indicated in the above chart will be indicated by the pump speed control PCB.

The layout of the pump speed control PCB is shown in the figure below. In faulty conditions if the hot water outlet temperature exceeds 600C, the pump speed will be reduced to minimum and if the outlet temperature exceeds 650C, the pump will be switched off until the outlet temperature reduces to 500C.

Jumpers
1 - Off
2 - Off

The LED will operate in the following way to show fault conditions:-

Off: No mains power supply - check fuse
Flashing - Low frequency System status is OK
Flashing - High frequency Temperature measurement error - faulty sensor or wiring On - Permanent Processor related fault - no control of hot water - replace PCB

MAINTENANCE

No annual/regular maintenance is required. However, with the manual fill model we do recommend that the water level in the top up cistern is checked periodically and water added if required. Particularly if the cistern lid has been removed.

 PARTS LIST

PARTS LIST

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KEY NO	DESCRIPTION	G.C. NUMBER	PART NO.
1	DHW plate heat exchanger	E05-664	GT017
2	PHE return temperature sensor	E26-022	GT149
3	DHW temp sensor	E26-024	GT153
4	DHW pump speed control PCB	E26-023	GT152
5	DHW pump	E05-723	GT105
6	Store overheat thermostat	397-978	GT064
7	Gravity check valve	E05-681	GT041
8	Immersion heater	E39-184	XB078
9	Rod thermostat	E39-185	XB501
10	Float switch	E39-186	XB251
11	Relay	E39-187	XB321
12	Green light (neon)	E39-190	XB100
13	Brawa mixing valve	385-872	XC007
14	DHW Flow switch	E05-674	GT106

 

APPENDIX

WATER SAVINGS

WATER RELATED COSTS CAN BE REDUCED BY GOOD PLUMBING PRACTICE.

Vast quantities of water are needlessly run off to waste due to Taps, Mixers and Showers discharging flow rates far in excess of the rates required for them to perform their duties.

The contrasting flow rates shown on this leaflet clearly illustrate the savings that can be made whilst still providing a good performance. British made AQUAFLOW REGULATORS provide constant flow rates by automatically compensating for supply pressure changes between 1 bar & 10 bars.

To facilitate installation into the wide range of plumbing equipment which is encountered in the U.K, FOUR FIXING OPTIONS are available:-

OPTIONS FOR SHOWERS

1. MXF “DW” RANGE - For fitting behind Fixed Shower Heads or onto Flexible Hoses for Handshowers (preferably onto the inlet end when lightweight hoses are used).

2. COMPRESSION FITTING RANGE. “In Line” regulators as in Option 4 for Taps & Mixers.

4 FIXING OPTIONS FOR TAPS & MIXERS

1. MK RANGE - Combined Regulators & Aerator for screwing onto Taps & Mixers with internal or external threads on their noses. Anti Vandal models also available.

2. MR05-T RANGE - Internal Regulators. Push fit into Tap or Mixer seats. Produced in three sizes - 12.5mm (BS1010), 12mm & 10mm, Flangeless models also available for Taps with Low Lift washers.

3. MXF STANDARD RANGE - Screw on tail models for Taps & Mixers. Fix onto the tails before fitting the tap connectors. Available in 3/8", 1/2" ,3/4" and 1" BSP.

4. COMPRESSION FITTING RANGE - “In Line” regulators housed in 15mm & 22mm CXC COUPLERS & ISOLATING VALVES. “ ” UK WFBS LISTED BY THE WATER RESEARCH CENTRE. Isolation valves available for slotted screwdriver operation or with coloured plastic handles. Now available also in plastic bodied push-fit couplers & valves.

Information by courtesy of
AQUAFLOW REGULATORS LTD
Haywood House, 40 New Road, Stourbridge, West Midlands DY8 1PA Telephone (01384) 442611 Fax: (01384) 442612

 

 

PULSACOIL III MANUAL ISSUE 5: 08/00

1. Page 6 - New Paragraph in Hot and Cold Water Services under item F.

‘On the odd occasion it is felt necessary to provide a secondary circulation. We would recommend the use of Raychem HWAT Plus or similar self regulating trace heating to maintain the temperature in the hot water distribution system. The system must be installed and commissioned fully in accordance with the manufacturers instructions.’

For Gledhill PulsaCoil 3 Parts and Spares click on the following link: Gledhill PulsaCoil 3 Parts And Spares