6
Pre-Installation
5.3 Pipework
The pipe runs should be executed as short as possible,
unused pipework should be removed and all remaining
pipework should be lagged in accordance with
regulatory requirements to prevent heat loss and the
formation of condensation.
5.4 Taps and Fittings
All taps and fittings incorporated in the system should
have a rated operating pressure of 0.6 MPa (6 bar) or
above.
5.5 Risk Assessment
It is strongly recommended to complete a risk
assessment before installing the product. The following
areas require particular consideration in addition to the
information required by the Health and Safety at Work
Act.
- Scalding: where appropriate or required by law a
thermostatic mixing valve is to be fitted to the hot
water outlet of the cylinder.
- Explosion: the unit is fully equipped with all relevant
safety equipment to comply with current regulations.
The correct design and function has been verified by
independent third party testing. The correct
application hereafter is the responsibility of the
competent installer.
- Water borne organisms (i.e. Legionella): if applicable
a risk assessment should be carried out following the
recommendations outlined in the Approved Code of
Practice L8.
- The user preference must be considered when
commissioning the system.
5.6 Siting Considerations
When choosing the place where the appliance is to be
installed the following points should be taken into
consideration:
- Structural integrity.
- Access for installation, operation, maintenance and
replacement.
- Routing of discharge pipework.
- Access to water mains supply, hot and cold water
distribution pipework.
- Access to suitable electricity supply.
It is PROHIBITED:
- To let the appliance operate using air intake which
contains solvents or explosive matter.
- To use air intake which contains grease, dust or
aerosol particles.
- To connect vented exhaust hoods to the ventilation
system.
It is PROHIBITED to install the appliance
- Outdoors
- In rooms which are exposed to frost
- In humid rooms which have a lot of steam or vapour
(for example, a bathroom)
The water heater may be located on any flat and level
surface, provided it is sufficiently robust to support the
weight of the water heater when full of water (please
see technical data) and suitably accessible for
replacement/maintenance without specialist tools or
lifting equipment as this will void the warranty
conditions.
Particular care must be taken when placing the water
heater in a garage or outbuilding. All exposed pipework
must be correctly insulated to avoid frost damage.
The position and orientation of the water heater should
be such that easy access is provided for servicing the
controls. A minimum distance of 400mm in front of the
immersion is recommended, to allow the replacement
of the immersion heater should the need arise. When
installing the water heater all labels should be clearly
visible and ensure that no pipework hinders any work to
be carried out on the various components.
To facilitate the condensates flow, adjust the feet so
Figure 1: Correct siting of Water Heater
5.7 Cold Water Supply
For satisfactory and safe performance of the water
heater the water supply must meet the following
criteria:
The following instructions have to be followed when
installing the cold water mains supply to the water
heater:
- The cold water supply to the water heater must come
directly from the cold water mains after the mains
stop valve to the property.
- The cold water inlet pipework should have at least an
inside diameter of 19mm and should meet the
requirements of the water regulations for the supply
of wholesome water.
Dimplex recommend an annual maintenance
inspection is carried out on the water heater. In hard
water areas this should include inspection of the
immersion heater, [above 120ppm or 120mg/l]. A local
water treatment company should be able to offer free
water quality testing. The heating elements may require
periodic de-scaling. The installer should do this as part
of a maintenance agreement.
Minimum dynamic pressure
150Kpa (1.5 bar)
Maximum inlet supply pressure
1200Kpa (12 bar)
Minimum flow rate
15l/min
Max. chlorine content
250mg/L
Max. water hardness
200mg/L
