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The PulsaCoil Stainless 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.
An important feature of the concept is that hot water can be supplied directly from
the mains at conventional flow 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 a printed circuit control board, which controls the speed of the
pump circulating the primary water from the store through the plate heat exchanger.
Because this product does not require a safety discharge from a temperature and
pressure relief valve, any installations will be easy to incorporate into the building
and will not suffer from the problems associated with using PVCu soil stacks to take
the discharge from unvented cylinders.
The heat losses from thermal stores should not be directly compared with heat losses
from unvented or vented cylinders because they are treated differently in SAP. This
is because the unvented and vented cylinders are tested at 65
°
C and the thermal
store at 75
°
C.
Figure 1.1
1. Bottom (Off-Peak) immersion heater
(1H_1)
2. Top (On-Peak) immersion heater (IH_2)
3. PHE pump
4. Cold Feed
5. CW inlet
6. HW outlet
7. Drain
8. Return from PHE to store
9. Flow from store to PHE
10. Feed and expansion tank
1
7
2
3
9
5
8
6
4
10
DESIGN
INTRODUCTION
Содержание PulsaCoil PCS 150 ECO
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Страница 31: ...Page 31 NOTES NOTES ...
