Warmhaus EWA 2525C, Installation & Service Manual

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warmhaus.co.uk
2.4. System Requirements
INFORMATION
The installation of this appliance must take into consideration all prevailing
regulations and codes of practice and the data in this manual.
This instruction manual and the below standards must be adhered to
throughout the installation
Building Regulations.
British Standards.
Irish Standards
Gas Safety Regulations.
Water Supply Regulations,
2.4.1. General
INFORMATION
The system must be to a minimum standard that meets all relevant criteria
and regulations at the time of the installation of this appliance.
All external components must be able to withstand a working pressure of 3
bar and a working flow temperature of 100 °C.
The system must be free of any leaks and in a suitable working condition
for the connection of a new appliance.
2.5. Water Supply (only for Combi Boiler)
INFORMATION
Appliance use in hard water areas:
In normal operating conditions there is no need to provide any water
treatment to prevent any limescale formation this is because the maximum
temperature of the DHW heat exchanger is monitored and limited by
electronic control.
In areas where the water exceeds 200 ppm it is advised that a scale
prevention should be installed, and you should contact your local water
authority for advice and guidance.
Installations that have non-return or backflow valves fitted on the cold
mains should have a mini expansion vessel fitted between the valve and
the appliance.
2.6. Gas Supply
INFORMATION
The gas installation should be in accordance with the relevant standards. In
GB this is BS 6891 (NG). In IE this is the current edition of IS 813 Domestic
Gas Installations.
The boiler must be installed on a supply from a governed gas meter.
The connection to the appliance is a 22mm copper tail located at the rear
of the gas service cock.
Ensure that the pipework from the meter to the appliance is of adequate
size, and the demands of any other gas appliances in the property are
taken into consideration. Do not use pipes of a smaller diameter than the
boiler gas connection (22mm) UNLESS the stated gas rate can be achieved
with pipe of lesser diameter and with all other gas appliances operating at
maximum rate.
Purging of any pipe work and the appliance must be carried out as outlined
in BS 6891.
2.6.1. By-pass
INFORMATION
The boiler incorporates a bypass by utilizing the primary circuit on the
DHW plate heat exchanger and uses this method as an integral bypass
system and therefore does not require as standard an external bypass fitted
to the system.
2.6.2. Ventilation
INFORMATION
The boiler does not require any additional ventilation and when installed in a
cupboard or compartment the boiler operates at an adequate temperature
without the requirement for additional ventilation. BS 5440: Part 2 refers
to this in detail.
2.6.3. Primary system cleaning
Debris in the existing heating system can cause damage to the boiler unit
correct cleaning has not been carried out.
2.7. Electric Supply
RISK OF ELECTRIC SHOCK
This appliance must be earthed.
This appliance must not be connected to a three-phase supply.
External wiring must be correctly earthed, polarised and in accordance with
relevant regulations/rules. In GB this is the current IEE Wiring Regulations.,
in IE this is Irish Standard IS 10101:2020
The mains supply is 230V ~ 50Hz fused at 3A.
Important:
The method of connection to the electricity supply must facilitate complete
electrical isolation of the appliance.
Connection may be via a fused double-pole isolator with a contact
separation of at least 3mm in all poles and servicing the boiler and system
controls only, alternatively the connection can be made via a fused 3 pin
plug to an un-switched shuttered socket both complying to BS1363
When working on the boiler the electricity must always be isolated and the
correct method of safe isolation must always be followed.
Any external controls connected to the boiler must have at minimum and
valid CE approval and be suitable for connection to the boiler.
Please ensure the correct RCD is fitted the circuit where the boiler is
connected electrically, due to the low energy DC modulating pump fitted
inside the boiler.
If you plan to replace the cable supplied with the boiler for the electrical
connection, please ensure the replacement cable meets the current
standard and it is the correct size and has the correct heat rating.
2.8. PRV Discharge
ATTENTION
The safety discharge pipe must be installed with a minimum pipe size
diameter of 15mm and be in copper or an other suitable material that can
withstand PRV discharge temperatures and pressures that comply with BS
5254 or BS EN 1451.
The PRV discharge terminal must terminate away from any electrical
hazards and terminate where it cannot cause injury to person, it should
terminate with a bend to face the external surface or into a suitable drain
point.
The PRV discharge can be installed into a waste pipe system and all
installations should follow the guidance of BS 6798 sections 6.
Due to maintenance of the PRV we require our copper connection pipe to
be connected to the external PRV pipe work by means of a compression
joint so that in all installations maintenance will be achievable without the
need to cut and re-join copper pipe work.
Where PRV terminations are not possible to visually see e.g. directly into
a waste pipe connection, then a tundish must be fitted so that and water
drips leaking from the PRV can be visually seen and the appropriate action
taken.
Care should also be taken when planning the termination of the PRV due
to the possibility of a slow and steady drip can discharge from the terminal
and if not correctly sited leave the possibility of water freezing when hitting
ground causing an extreme hazard if the frozen water is in the path of a
walk way.