Everflo EDS120, Руководство по установке

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19
EVERFLO STAINLESS uV
uNVENTEd HOT WATER CyLINdERS
PRE-PLuMBEd
CyLINdER INSTALLATION
COLd MAINS PIPEWORK
Run the cold main through the building to the place where the
EVERFLO STAINLESS uV PRE-PLuMB unit is to be installed. Take
care not to run the cold pipe near hot water or heating pipework
so that the heat pick-up is minimized. Identify the cold water
supply pipe and fit an isolating valve (not supplied). A 22mm
BS1010 stopcock can typically be used but a 22mm quarter turn
full bore valve would be better as it does not restrict the flow as
much. do not use “screwdriver slot” or similar valves. Make the
connection to the inlet control set (Position 2). Ensure that the
arrow points in the direction of the water flow. Select a suitable
position for the expansion vessel. Mount it to the wall using the
bracket provided. Connect the expansion vessel to the cold feed
pipework between the inlet control set and the cold inlet. Ensure
that the top of the vessel is accessible for servicing.
CONNECTING TO THE CyLINdER
All of the pipework connections on the cylinder are 22mm
compression and supplied complete with gland nuts and olives, in
the Accessory Kit box. Only connect 22mm Table X copper tube to
these connections. Cut the tube with a pipe cutter and ensure no
sharp edges or burrs protrude. Slide both gland nut and olive onto
the tube and push tube fully home into the connection, ensuring
the tube end fully bottoms on the connection recess. Smear the
outer wall of the olive with plumbing paste and tighten gland nut
in the prescribed manner. upon filling/commissioning, ensure all
connections are completely watertight.
BALANCEd COLd CONNECTION
If there are to be showers, bidets or monobloc taps in the
installation then a balanced cold supply is necessary. There is a
22mm balanced connection on the inlet set.
HOT WATER PIPEWORK
Connect to HWdO (Position 1 on diagram). Run the first part of the
hot water distribution pipework in 22mm. This can be reduced to
15mm and 10mm as appropriate for the type of tap etc. your aim
should be to reduce the volume of the hot draw-off pipework to
a practical minimum so that the time taken for the hot water is as
quick as possible. Where monobloc mixing taps and showers are
used, these should be installed to comply with the Water Supply
(Water Fittings) Regulations 1999. If these devices are supplied
with un-balanced supplies there should be single check valves
installed at both inlets, to stop over pressurising of either supply.
CONNECTIONS FOR INdIRECT uNITS
Connect to the boiler flow and return (Positions 19 & 14) lines.
An additional expansion vessel and safety valve is supplied. The
boiler may be Gas, Electric or Oil but must be under effective
thermostatic control. uncontrolled heat sources such as some
AGA’s, back boilers, solid fuel stoves, etc. are NOT SuITABLE.
Please contact our Technical department for guidance. Connect to (Position 9 & 13) for the radiator circuits. Twin zone heating unit
are supplied with 2 port zone valves in positions 9a and 9b.
CONNECTIONS FOR SOLAR COILS
Connect to the solar coil as detailed on page 13 ensure the solar
pump is connected via the over temperature cut out as described
on page 13.
SECONdARy CIRCuLATION
EVERFLO cylinder can be used with secondary circulation. An
appropriate WRAS approved bronze circulator should be used in
conjunction with a non-return valve to prevent backflow. On large
secondary circulation systems it may be necessary to incorporate
an extra expansion vessel into the circuit to accommodate the
increased system water volume. A secondary return boss is fitted
as standard on 210, 250 & 300 ltr units (Position 17). On smaller
sizes, tee into the cold feed pipe above the drain.
IMMERSION HEATERS
Only immersion heaters with a thermal cutout may be used. To
help ensure this, the immersion heaters have a special 1¾” thread.
They are rated at 3 kW at 240 V and are of a low noise Incoloy
construction. They have both a thermostat and a high limit cutout.
Please order the correct replacement via ourselves; fitting non-
approved immersions may affect your guarantee. When fitting,
ensure the ‘O’ ring is positioned correctly on the head of the
immersion heater and lubricate before fitting. Fit it by hand until
almost home then tighten gently as the ‘O’ rings will seal easily.
The electrical supply to each immersion heater must be fused at
13A via a double pole isolating switch to BS 3456. The cable must
be 2.5mm2 heat resistant (85°C HOFR) sheathed flex complying
to BS 6141:1981 Table 8. do not operate the immersion heater/s
until the unit is full of water. do not operate the immersion
heater/s if any sterilisation liquid is in the cylinder as this will cause
premature failure.
ELECTRICAL CONNECTIONS
Complete the wiring – use the appropriate wiring diagrams on
pages 17 & 18.
COMMISSIONING
Carry out commissioning as per instructions on page 21 and in line
with boiler manufacturer’s instructions for the heating and the
primary circuit. Primary pipework must be filled, bled and tested
in accordance with the boiler manufacturer’s instructions, to avoid
damage to the circulation pump.