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pulsa
c
oil
a
-cl
ass
sol
1.0 design
1.1 introduction
The arrangement and components of a PulsaCoil
A-Class Sol appliance are shown schematically
opposite.
The current solar appliance is based on the
standard PulsaCoil appliance and this addendum
must be read in conjunction with the Design,
Installation and Servicing Instructions provided
for the standard appliance.
The basic difference between this and a
standard PulsaCoil appliance is the addition of a
solar coil at the bottom of the thermal store.
all the equipment and controls for the solar
system will need to be designed, supplied
and installed by the solar installer from
the connection provided on top of the
appliance.
However, a pair of connections are provided on
the PulsaCoil from a sensor (T3) to provide the
facility for a high temperature interlock to be
wired back by the installer to the solar controller.
This needs to be connected to prevent the
solar pump from running in the event that the
thermal store reaches a temperature above
87
o
C , see page 4 for further details. A 10mm dry
pocket is also provided at low level (T2) for the
installation of a solar control sensor. A further
control sensor will also need to be provided by
the installer adjacent to the solar collector (T1).
See diagram on page 4 for further details.
To obtain maximum benefit from this appliance
it is recommended that it is used in conjunction
with an Economy 7 off peak electrical tariff.
If the appliance is used with an on peak tariff it
is recommended that a time clock is fitted on
the electrical supply to the off peak (bottom)
immersion heater. This should be set to charge
the store overnight and allow the solar to
replenish the store during the day.
a new appliance incorporating most of
the solar equipment and controls will be
available later this year. the controls will be
intelligent and under certain conditions will
hold off input from the electrical supply if a
solar input is available.
The standard manual fill model is shown
opposite but an automatic fill model with ball
valve and overflow can be provided if ordered
as an optional extra.
If the water hardness exceeds 200ppm (mg/l)
the factory fitted scale inhibitor should be
ordered as an optional extra.
16
17
18
9
6, S3
7, S4
10
5, S5
4, S6
12
11
8
13
25
26
15
14
1
3
S1/S2
11
19
20
2
21
22
23
F & E Cistern
24
Schematic arrangement
T3
T2
1. Bottom (Off-Peak) immersion heater (IH_1)
2. Top (On-Peak) immersion heater (IH_2)
3. Overheat sensor pocket (Sensor S1/S2)
4. Middle sensor pocket (Sensor S6 for IH_2)
5. Bottom sensor pocket (Sensor S5 for IH_1)
6. DHW inlet (CW) sensor, S3
7. DHW outlet sensor, S4
8. Grundfos UPR 15-50 pump
9. Filter & flow regulator (26 l/min)
10. Plate heat exchanger
11. Pump/PHE isolating valves
12. Non-return valve
13. Pre-expansion chamber
14. Open vent/safety
15. Cold feed/expansion
16. CW inlet
17. HW outlet
18. Drain tapping
19. Return from PHE to store
20. Flow from store to PHE
21. Solar coil
22. Bottom solar sensor pocket (10mm tube base) - T2
23. Top solar sensor - T3
24. Feed and expansion cistern
25. Solar coil flow (collector) connection (15mm copper)
26. Solar coil return connection (22mm copper)
Summary of Contents for PCA 200 - SOL
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