Vaillant auroTHERM VFK 900, Start-Up, Maintenance And Troubleshooting Manual

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31 Manual - Solar hot water systems 0020009607_02
5.1.3 Intended use
The Vaillant solar cylinders auroSTOR VIH S GB 200 S,
VIH S GB 250 S and VIH S GB 250 are unvented,
indirectly heated hot water cylinders for solar systems
designed for usage with boilers in hot water supply
systems in accordance with the GB standard.
They are used only to supply potable water heated up to
85 °C in solar systems with a collector array. They may
only be used for this purpose. The solar cylinders can be
used in combination with a downstream boiler for hot
water supply in accordance with the GB standard.
a
Caution!
Risk of damage!
The appliances may only be used to heat up
potable water. Damage to the appliance due to
corrosion cannot be excluded if the water does
not correspond to the specifications of the
water ordinance.
Any other use or extended use is considered to be
improper. The manufacturer/supplier is not liable for any
resulting damage.The owner alone bears the risk.
Intended use includes the observance of the system
manual and the adherence to the inspection and
maintenance conditions.
a Caution!
Any improper use is forbidden.
Valliant solar cylinders are state-of-the-art appliances
which have been constructed in accordance with
recognised safety regulations. Nevertheless, there is still
a risk of injury or death to the user or others or of
damage to the equipment and other property in the
event of improper use or use for which they are not
intended.
5.1.4 Data badge
The data badge has been applied to the top of the solar
cylinder by the manufacturer.
5.1.5 Safety devices
The solar cylinder has been provided with all safety and
control devices for operation of the unvented domestic
hot water supply:
– Temperature and pressure relief valve (95 °C, 7 bar)
– Pressure limiting valve (3.5 bar) with line strainer
– Expansion relief valve (one port valve, 6.0 bar)
– Thermal cut out of the solar pump, set to 90 °C,
connected to the solar pump in order to isolate this
heat source in the event of failure of the solar control.
– Thermal cut out of the immersion heater
– Thermal cut out of the solar cylinder, set to 90 °C,
connected to the motorised 2 port valve, in order to
isolate the primary heat source in the event of failure
of the domestic water thermostat.
5.1.6 Safety instructions and regulations
This product has been checked for adherence to the
building regulations for unvented hot water cylinder
systems. It may not be changed or modified in any way
whatsoever.
It should be installed by a qualified specialist, who
should observe the applicable regulations of the local
authorities, the building regulations, the building
regulations for Scotland, the building regulations for
Northern Ireland and the directives of the local water
supply companies.Building approval is required for the
installation.The local authority should be notified about
the intended installation.Only original spare parts from
Vaillant Ltd. may be used for the replacement of parts.
5.1.7 Scope of delivery
• Check the scope of delivery of the cylinder box.
- Water control pack (pressure limiting valve, expansion
relief valve; connections for: secondary return, hot
water expansion vessel)
- Motorised 2 port valve
- Tundish
- Cylinder drain valve
- System description
- Assembly set for hot water expansion vessel
- Hot water expansion vessel:
- 18 litres for VIH S GB 200 S
(max. storage volume at 3.5 bar = 255 l)
- 25 litres for VIH S GB 250 /300 S
(max. storage volume at 3.5 bar = 315 l)
- Thermal cut out for solar pump with holder
- Solar cylinder
Make sure the cylinder is stored in an upright position in
a dry environment prior to its installation.
5.1.8 Requirements of the installation site
Place the solar cylinder at an appropriate place in the
building, while observing the following:
– The discharge pipe from the tundish must be installed
at a minimum slope of 1:200 and end at a safe and
visible point (refer to Section 5.7, Installation of the
discharge pipe).
– The installation surface must be level and able to bear
the weight of the full cylinder (refer to Section 5.1.2,
Technical data of the auroSTOR solar cylinder).
– The installation site may not be prone to frost.A frost
protection thermostat must be installed if necessary.
– The controller of the installed cylinder thermostat
under the front plate must be accessible to the owner.
– There must be sufficient space to install, check and
repressurise the expansion vessel.
– Floor unevenness should not be greater than those
able to be compensated by the adjustable feet of the
solar cylinder.
Installation 5
relief valve; connections for: secondary return (not
recommended for solar cylinders) hot water expansion vessel