Benchmark POTTERTON Gold, Инструкция по установке и обслуживанию

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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 6 bar (Solar coil)
Storage capacity See Table 1
Weight when full See Table 1
PIPE FITTINGS
All pipe fittings are made via 22mm compression
fittings directly to the unit. The fittings are threaded
3/4”BSP male parallel should threaded pipe
connections be required.
COLD FEED
A 22mm cold water supply is recommended, however
if a 15mm (1/2”) supply exists which provides sufficient
flow this may be used (although more flow noise may
be experienced).
A stopcock or servicing valve should be incorporated
into the cold water supply to enable the POTTERTON
GOLD SOLAR cylinder and its associated controls to be
isolated and serviced.
COLD WATER COMBINATION VALVE ASSEMBLY (FIG 2)
The 2-piece cold water combination valve assembly
can be located anywhere on the cold water mains
supply prior to the expansion vessel (see Fig. 6 Page
8 ) but the two pieces do not have to be installed
together. The pressure reducing valve incorporates the
pressure reducer and strainer and the expansion valve
incorporates the expansion and check valves. Ensure
that the valves are installed in the correct order and
orientation. No other valves should be placed between
the expansion valve and the POTTERTON GOLD
SOLAR unit. A connection can be made between the
expansion and pressure reducing valves to provide a
balanced cold water connection. The expansion valve
connection must not be used for any other purpose.
Fig. 2: Cold water combination valve assembly
INSTALLATION - GENERAL
(FIGS 4 & 6)
POTTERTON GOLD SOLAR MUST BE INCORPORATED
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 TEMPERATURE CONTROLLER.
IMPORTANT NOTE:
DRAIN TAP
A suitable draining tap should be installed in the
cold water supply to the POTTERTON GOLD SOLAR
cylinder unit between the expansion valve (see Fig.
6 Page 8 ) and the heater at as low a level as possible.
It is recommended that the outlet point of the drain
pipework be at least 1 metre below the level of the
heater (this can be achieved by attaching a hose to the
drain tap outlet spigot).
EXPANSION VESSEL
The expansion vessel accommodates expansion
that results from heating the water inside the unit.
The expansion vessel is pre-charged at 3.5 bar. The
expansion vessel must be connected between the
expansion valve (see Fig. 2) and the POTTERTON GOLD
SOLAR cylinder (see Fig. 6 Page 8). The location of the
expansion vessel should allow access to recharge the
pressure as and when necessary, this can be done
using a normal car foot pump. It is recommended
that the expansion vessel is adequately supported. An
expansion vessel wall mounting bracket is supplied for
this purpose and should be fitted.
NOTE: DO NOT USE THE POTABLE WATER
EXPANSION VESSEL SUPPLIED WITH THE
POTTERTON GOLD SOLAR CYLINDER FOR ANY
OTHER PURPOSE. IT IS NOT SUITABLE FOR USE ON
A SOLAR PRIMARY CIRCUIT.
SECONDARY CIRCULATION
If secondary circulation is required it is recommended
that it be connected to the POTTERTON GOLD SOLAR
cylinder as shown in Fig. 3. The secondary return pipe
should be in 15mm pipe and incorporate a check valve
to prevent backflow. A suitable WRAS approved bronze
circulation pump will be required. On large systems,
due to the increase in system water content, it may be
necessary to fit an additional expansion vessel to the
secondary circuit. This should be done if the capacity of
the secondary circuit exceeds 10 litres.
Pipe capacity (copper)
15mm O.D = 0.13 l/m (10 litres = 77m)
22mm O.D = 0.38 l/m (10 litres = 26m)
28mm O.D = 0.55 l/m (10 litres = 18m)