Glow-worm Clearly Heat Pumps - Standalone Module System - Manual (Page 16)

0020096321_00 - 07/10 - Glow-worm
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INSTALLATION
5.3.1 Domestic hot water pipework
• Connect the hot water outlet to the 22mm hot water
connection of the cylinder.
• Lay a further 22mm pipe to the fi rst T-piece.
A pipe of 15mm diameter should then be suffi cient.
• If the pipe is very long or several outlets are supplied,
continue with another 22mm pipe.
5.3.2 Thermostatic mixing valve
A hot water thermostatic mixing valve ensures the hot water
from the cylinder is mixed with cold water to a desired maximum
temperature between 30°C and 60°C.
• Set the thermostatic mixing valve to the desired maximum
temperature during the system commissioning.
a
Risk of scalding! Set the thermostat mixer to
60°C or below and check the temperature at
a hot water tap to ensure effective protection
against scalding.
5.3.3 Mains water supply
The performance of unvented cylinders depends on the
available mains water pressure and the pipe size.
In order for the performance of the Flurocyl cylinder to be
ideal, an appropriate cold water supply must be available.
The measured static pressure must be at least 2.0 bar. A
corresponding fl ow rate of at least 20 - 25 l/min should be
available.
NOTE: The mains water pressure is reduced during periods of
high water consumption. Make sure you take measurements
during these periods.
Example: The available fl ow rate of mixed water at 40°C is 25
l/min (15 l/min hot water of 60°C from the cylinder mixed with
10 l/min cold water of 10°C) if the measured static cold mains
water pressure is 2 bar.
The cylinder operates satisfactorily at a mains water pressure of
below 2 bar, but at a reduced fl ow rate. The unvented cylinder
should not be installed if the mains water pressure is below 1
bar. You can obtain information on alternative hot water supply
systems from Glow-worm.
To keep the friction losses at a minimum, a minimum diameter
of 22mm is recommended for the cold water supply in the
building, satisfactory performances can also be achieved with
15mm pipes however.
5.3.4 Cold water inlet controls and pipework
• Connect both parts of the water control pack.
• When installing the valves, make sure they are aligned in
such a way that the 15mm connection of the expansion relief
valve can be connected to the tundish.
• Install the assembled water control pack in the cold water
supply at an appropriate place next to the cylinder.
• Make sure there is suffi cient space for maintenance and the
connection of the discharge pipe from the expansion relief
valve.
• Install the drain valve in the cold water supply at the lowest
point between the cylinder and the water control pack.
We recommend applying a hose, which reaches about 1m
under the base of the cylinder, to the outlet of the drain valve.
b
Risk of bursts for the cylinder! No stop valve
may be installed between the cold water control
pack and the cylinder.
• Install the water pack so that a discharge pipe of the
expansion relief valve can be fi tted with constant outward
slope which can end at a safe, visible point where there is no
risk of freezing.
b
Risk of the cylinder bursting due to
overpressure! The outlet of the expansion relief
valve must not be covered or closed.
• Test the expansion relief valve regularly to avoid calcifi cation.
To ensure an optimum performance of the cylinder, in
particularly buildings in which a pressure controlled cold water
is used, copper pipes with a diameter of at least 22mm should
be used for the pipe from the main stop valve of the building to
the cylinder.
If the discharge pipes are all together, the expansion relief
valve may not be installed more than 500 mm away from the
temperature and pressure relief valve.
The Flurocyl cylinder is supplied with an external hot water
expansion vessel (DW EV).
• Connect this expansion vessel to the installed water control
pack as follows:
• Screw the expansion vessel directly onto the water control
pack, via the connection intended for this purpose or
• Connect the expansion vessel to the water control pack
with a copper pipe or an appropriate hose. Make sure the
expansion vessel is supported suffi ciently.
• Use the supplied mounting bracket if the expansion vessel is
to be mounted on the wall.
• Connect thermostatic mixing valve cold supply to the
pressure controlled cold water connection of the water
control pack (if convenient).
i In areas with high water pressure (4 bar or more), a
bath or shower mixer valve could also be connected
to the pressure-controlled cold water connection
of the water control pack. This is to ensure the
pressure of the hot and cold water supply to the
mixer valve is about the same. Any second cold
water supply connection should be installed between
the water control pack and the cylinder by means of
a T-piece.