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Page 7

DESIGN

TECHNICAL DATA

Sizing the Buffer store to the Heat pump

Buffer stores should be sized as per the table below (source paragraph 
4.5 BS EN 15450). 

One heat pump manufacturer recommends that -

 ‘… A prerequisite for energy-efficient operation is the proper design of 
the heat source system and the heat utilization system. One of the most 
important factors of heat pump efficiency is keeping the temperature 
difference between the heating water and the heat source as small as 
possible. It is therefore strongly recommended that the design of both 
the heat source system and the heat distribution system be carried out 
with great care.

A 1 Kelvin (1C) higher temperature difference corresponds to an increase 
in power consumption of approximately 2.5%. When designing the heating 
system care must be taken that special applications such as domestic water 
heating are taken into consideration and dimensioned for low temperature 
operation. Heat pumps are optimally suited for underfloor heating (surface/
radiant heating) applications due to the low supply temperatures (30
˚C to 
40
˚C). A considerable contribution to the economical operation is made 
by the heat pump controller provided it is set correctly…’

Using the buffer store in conjunction with an additional heat source 
requires a more sophisticated control system. This is to stop the boiler 
dominating the heating of the cylinder and reducing the possible input 
of the heat pump.

Several alternative arrangements are shown on page 7 & 8. It is also 
possible to use a buffer vessel in a serial arrangement, either in the return 
or flow from the heat pump.

Heat Pump Sizing

Cylinder capacity

Heat pump output

90 litres

2.6kW - 7.5kW

120 litres

3.4kW - 10kW

210 litres

6kW - 17.5kW

300 litres

8.5kW - 25kW

400 litres

11.4kW - 33.3kW

Содержание 120IND

Страница 1: ...dels covered in this manual Stainless Lite Direct Buffer 90 400 litres Stainless Lite Indirect Buffer 120 400 litres Stainless Lite Flexible Buffer 90 400 litres StainlessLite Buffer Store Stainless steel store for use with heat pumps and boilers ...

Страница 2: ...UNLESS SPECIFICALLY REQUESTED TO DO SO IN WRITING All goods are sold subject to our Conditions of Sale which are set out at the rear of this specification In the interest of continuously improving the Stainless Lite range Gledhill Building Products Limited reserve the right to modify the product without notice and in these circumstances this booklet which is accurate at the time of printing should...

Страница 3: ... heat source is useful for extreme conditions when the heat pump may not be able to supply the heat required and when it can top up the store Flexible buffer stores This type of buffer store has been designed with flexibility in mind It enables multiple heat pumps and or separate domestic hot water and central heating zones to be connected For this reason the installation diagrams in the following...

Страница 4: ... cylinder bar 3 5 3 5 3 5 3 5 3 5 Maximum working pressure space heating bar 3 5 3 5 3 5 3 5 3 5 Central heating flow connection mm 28 28 28 35 35 Central heating return connection mm 28 28 28 35 35 Heat pump flow connection mm 28 28 28 35 35 Heat pump return connection mm 28 28 28 35 35 Central heating flow tapping height mm 732 920 1483 2020 2030 Central heating return tapping height mm 200 200 ...

Страница 5: ...ection mm 28 28 35 35 Heat pump return connection mm 28 28 35 35 Coil flow connection mm 22 22 22 22 Coil return connection mm 22 22 22 22 Central heating flow tapping height mm 920 1483 2020 2030 Central heating return tapping height mm 200 200 200 214 Heat pump flow tapping height mm 690 1253 1791 1805 Heat pump return tapping height mm 300 300 300 314 Coil flow tapping height mm 535 780 1000 10...

Страница 6: ...s mm 28 28 35 35 35 35 Upper tapping height mm 470 662 1225 1475 1761 1776 Lower tapping height mm 295 295 295 295 295 310 Vent relief boss 22mm compression mm Top Mid Top Mid Top Mid Top Mid Top Mid Top Mid Drain 1 2 BSP height mm 220 220 220 220 220 235 Inspection hatch 1 3 4 BSP height mm 370 370 370 370 370 385 Thermostatic pocket size mm 22 22 22 22 22 22 High level stat height mm 470 662 122...

Страница 7: ...g systemcaremustbetakenthatspecialapplicationssuchasdomesticwater heating are taken into consideration and dimensioned for low temperature operation Heatpumpsareoptimallysuitedforunderfloorheating surface radiant heating applications due to the low supply temperatures 30 C to 40 C A considerable contribution to the economical operation is made by the heat pump controller provided it is set correct...

Страница 8: ...sealed under floor heating system Buffer Store Underfloor heating Heat pump Boiler or additional heat source Sealed system kit Sealed system kit A typical example where a heat pump is supplying a direct Stainless Lite buffer store which in turn is supplying a sealed under floor heating system Buffer Store Underfloor heating Heat pump Sealed system kit ...

Страница 9: ...stem Heat pump Boiler or additional heat source Sealed system kit Sealed system kit Hot water Motorised Valve Energy cut out Not supplied Stainless Lite Heat Pump A typical example where a heat pump is supplying a direct Stainless Lite buffer store which in turn is supplying the heating system and Stainless Lite Heat Pump cylinder Buffer Store Heating System Heat pump Sealed system kit Hot water S...

Страница 10: ... the unit or a total failure of the heat pump Water Treatment And Frost Protection Although the Buffer store has no special water treatment requirements the radiators and other parts of the circuit will require the application of a scale and corrosion inhibitor The heat pump and the external connecting pipe work will also require protection against freezing For this reason a combined antifreeze an...

Страница 11: ...Page 11 APPENDIX APPENDIX A ...

Страница 12: ...e lifting ensure you have a good hold e Taking the lead for team lifts As more than one person is required for these products ensure that one person is taking the lead This may be you so ensure that each person that is helping is made aware of the weight and of the items listed within this assessment Make sure you and any others helping know the route you intend to take that it is clear of any obs...

Страница 13: ...Page 13 NOTES ...

Страница 14: ...Page 14 NOTES ...

Страница 15: ...Page 15 NOTES ...

Страница 16: ...on chloride sulphate Max 300 mg l in total 9 2 5 Whereappropriatetheunithasbeenregularlymaintainedasdetailedintheinstallationandserviceinstructions 9 2 6 Defects caused by corrosion or scale deposits are not covered by any Guarantee 9 2 7 Where we agree to rectify any defect we reserve the right to undertake the work on our own premises 9 2 8 We will not accept any labour charges associated with r...

Страница 17: ... i the Purchaser shall hold the goods in a fiduciary capacity for us and shall store the same separately from any other goods in the Purchaser s possession and in a manner which enables them to be identified as our goods ii the Purchaser shall immediately return the goods to us should our authorised representative so request All the necessary incidents associated with a fiduciary relationship shal...

Страница 18: ...Other Is the cylinder solar or other renewable compatible Yes No What is the hot water temperature at the nearest outlet C All appropriate pipes have been insulated up to 1 metre or the point where they become concealed Yes UNVENTED SYSTEMS ONLY KHUH LV WKH SUHVVXUH UHGXFLQJ YDOYH VLWXDWHG LI WWHG What is the pressure reducing valve setting bar DV D FRPELQHG WHPSHUDWXUH DQG SUHVVXUH UHOLHI YDOYH D...

Страница 19: ...ame Telephone No Comments Signature SERVICE 05 Date Engineer name Company name Telephone No Comments Signature SERVICE 07 Date Engineer name Company name Telephone No Comments Signature SERVICE 09 Date Engineer name Company name Telephone No Comments Signature SERVICE 02 Date Engineer name Company name Telephone No Comments Signature SERVICE 04 Date Engineer name Company name Telephone No Comments...

Страница 20: ...mited would be pleased to provide further customer support with a range of services including Low cost annual repair and maintenance contracts direct from Gledhill Annual servicing and safety checks Expert response to out of warranty breakdowns at fixed charges Please call 08445 679898 or visit www gledhill net for further details Only the best is acceptable FM 02057 Gledhill Building Products Lim...

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