2
Table 1: Unit weights
IMPORTANT NOTE:
THE PULLIN EVOLUTION SOLAR MUST BE INCOR-
PORATED INTO A FULLY PUMPED SOLAR PRIMARY
CIRCUIT. CONTROL OF THE SOLAR PRIMARY IS
ACHIEVED BY THE USE OF EXTERNAL CONTROLS
NOT SUPPLIED WITH THE UNIT. CONTROL MUST BE
VIA A PURPOSE DESIGNED SOLAR HYDRAULIC
STATION AND SOLAR DIFFERENTIAL TEMPERA-
TURE CONTROLLER.
GENERAL REQUIREMENTS
SITING THE UNIT
The Pullin Evolution Solar must be installed vertically.
Although location is not critical, the following points
should be considered:
• The Pullin Evolution Solar should be sited to
ensure minimum dead leg distances, particularly
to the point of most frequent use.
• Avoid siting where extreme cold temperatures
will be experienced. All exposed pipework should
be insulated.
• The discharge pipework from the safety valves
must have minimum fall of 1:200 from the unit
and terminate in a safe and visible position.
• Access to associated controls and immersion
heaters should be possible to allow for periodic
servicing and maintenance.
• Ensure that the base chosen for the Pullin Evo-
lution Solar is level and capable of permanently
supporting the weight when full of water (see
Table 1).
The Pullin Evolution Solar has an operating pressure
of 3.5 bar that is controlled by the cold water combi-
nation valve assembly. The cold water combination
valve assembly can be connected to a maximum mains
pressure of 16 bar.
Wherever possible the mains supply pipe should be
22mm. We suggest the minimum supply requirements
should be 1.5 bar pressure and 20 litres per minute
flowrate. However, at these values outlet flow rates
may be poor if several outlets are used simultaneously.
The higher the available pressure and flow rate the
better the system performance.
OUTLET/TERMINAL FITTINGS (TAPS, ETC.)
The Pullin Evolution Solar can be used with most
types of terminal fittings. It is advantageous in many
mixer showers to have balanced hot and cold water
supplies. In these instances a balanced pressure
cold water connection should be placed between the
2 pieces of the cold water combination valve assem-
bly (see Fig. 1). Outlets situated higher than the
Pullin Evolution Solar will give outlet pressures lower
than that at the heater, a 10m height difference will
result in a 1 bar pressure reduction at the outlet.
LIMITATIONS
The Pullin Evolution Solar should not be used in
association with any of the following:
• Solid fuel boilers or any other boiler in which
the energy input is not under effective thermo-
static control unless additional and appropriate
safety measures are installed.
• Ascending spray type bidets or any other class
1 back syphonage risk requiring that a type A air
gap be employed.
• Steam heating plants unless additional and ap-
propriate safety devices are installed.
• Situations where maintenance is likely to be ne-
glected or safety devices tampered with.
• Water supplies that have either inadequate pres-
sure or where the supply may be intermittent.
• Situations where it is not possible to safely pipe
away any discharge from the safety valves.
• In areas where the water consistently contains
a high proportion of solids, e.g. suspended matter
that could block the strainer, unless adequate fil-
tration can be ensured.
OPERATIONAL SUMMARY
Maximum mains pressure
16 bar
Operating pressure
3.5 bar
Expansion vessel charge pressure
3.5 bar
Expansion relief valve setting
6 bar
T&P relief valve setting
90°C/10 bar
Maximum primary circuit pressure
(auxillary coil) (indirect only)
3 bar
Maximum primary circuit pressure
(solar coil)
6 bar
Storage capacity
See Table 1
Weight when full
See Table 1
WATER SUPPLY
Bear in mind that the mains water supply to the prop-
erty will be supplying both the hot and cold water re-
quirements simultaneously. It is recommended that the
maximum water demand is assessed and the water
supply checked to ensure this demand can be satis-
factorily met.
Note: A high mains water pressure will not always
guarantee high flow rates.
Type
Model
reference
Nominal
capacity
(litres)
Weight of
unit full
(kg)
DIRECT
PES190D
190
235
PES210D
210
259
PES250D
250
302
PES300D
300
362
INDIRECT PES190I
190
240
PES210I
210
264
PES250I
250
308
PES300I
300
367