Amazon HXINUV, Installation Instructions A1, 28th June 2019
Plumbing
The cylinder will be supplied with the plate heat exchanger and bronze pump pre-plumbed, and pre-wired with the buffering and safety
thermostats. The inlet control set, expansion vessel and 2 Port energy cut out valve (parts supplied loose) should be installed as per the
cylinder manufacturers Instructions. Expansion and Temperature / Pressure relief valves should be connected to discharge pipework
(via the tundish) which must be installed in accordance with Building Regulations Document G, as described in the cylinder
Manufacturers Instructions.
Consideration must be given by the installer to the primary flow and return temperature delta and flow rates of the boiler plant or
primary heat source that is to be connected. The set up and operation of the unit assumes a delta on the Cold Water Mains in /
Domestic Hot Water out sides of the plate heat exchanger of 50C in a single pass. The resultant delta on the primary side can be in the
region of 40 - 45C and flow rates of 15 - 35 Litres/min., dependent on the power of the heat source and its flow temperature. If the
connected plant or heat source cannot operate with these deltas or flow rates, suitable bypass and flow regulation equipment must be
sourced and fitted by the installer upstream of the plate heat exchanger, to accommodate this.
For twin cylinder variants Only:Take note that the cold supply will need to be cross-connected to both cylinders at the cold inlet
connections at their base; and a further connection made between the DHW output of the pre-assembled plate heat exchanger, and the
secondary return connection of the second cylinder using the pipework & second flow setter assembly (supplied loose). The image
below is indicative of the resulting assembly. Refer to Section
Commissioning
for adjustment of the flow setters. Note that in this
instance, the total required flow rate for the system must be split equally across the two components.
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