RED A10-UHE, Installation And User Manual

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User’s Manual Code 001 Page 10-54 Rev 0819
10.2.2 Hot and cold-water connections
The supplied union to compression fittings should be fitted to the hot and cold domestic hot
water heat exchanger coil connections, please ensure the gaskets suppled in the kit bag are
fitted. These are positioned on the top of the tank and are identified with a tap symbol. Care
should be taken to ensure the hot and cold-water supplies are connected to the correct
fitting. Connections to the cold and mixed hot water pipe set fittings should be made using
compression fittings.
10.2.3 Distribution pipework
Distribution pipework should be designed and laid out in a way to minimise transfer time
between the hot water storage system and hot water outlets. In larger installations with long
pipe runs it may be necessary to install a pumped secondary hot water circuit (Section 10.2.6)
to circulate hot water around the property. This ensures hot water is always available on
demand. It is recommended 22mm distribution pipework be used throughout the property,
however it is possible that short lengths (< 1m) of 15mm pipework can be used to service
baths, showers or taps where required. Any pipework and fittings used should withstand a
maximum pressure of 6 bar at a temperature of 95 degrees. This should not impede safe
operation or visibility of warning discharges. The hot water storage tank itself does not
require any additional insulation. It is recommended that the hot water discharge pipework
must be insulated over its entire length, if this is not possible due to an existing installation
pipework leaving the tank must be insulated to a minimum of 2m.
10.2.4 Fill Loop Connection
With the mixing valve and pipe set in place, the fill loop including isolation valve should be
fitted. Ensure the direction arrow on the side of the isolation valve follows the direction of
flow. The fill loop and isolation valve should be accessible and unobstructed by any pipework
to allow the isolation valve to be easily operated and the fill loop removed when not in use.
Two ½” plugs are supplied to blank off connections labelled A and B when the fill loop is
disconnected.
Figure 26 Hot and cold water connections