Section 5 - Package Installation
9
Installation and Servicing
5.1 PHEX PACKAGE LAYOUT
557
30-90
1545
685
550
685
5.2 POSITIONING
Careful consideration must be given to the installation
tolerances to prevent kinked or non-fitting connections.
If the package is being installed as a retrofit to replace an
existing appliance care should be taken to ensure that the
position of the flue connection on the new appliance is
consistent with the existing equipment.
IMPORTANT: Example shown is
for the Evomax 2 150 kW boiler. Note
that the position of the flue connection
for the boiler will vary depending on
the model. Refer to the installation
manual for the appliance.
5.3 LEVELLING
Levelling feet are provided to allow height adjustment
of the package. Height adjustment can be used for
levelling and ensuring that connections to existing flue
systems are correct.
Stainless steel construction of the
plate heat exchanger permits high flow
velocities through plate connections.
Secondary pipework typically requires
increase in size compared to PHEX
connection size to meet guidance on flow
velocities.
Increase from a plate connection should
be created before bends or changes
of direction in secondary pipework.
Pipework on the secondary side of the
plate should be sized by flow rate /
temperature differential of the secondary
system.
Maximum permissible flow rate through
the secondary side of the plate is 2.8 l/s
producing 41 kPa resistance.
Secondary
Flow (1")
Secondary
Return (1")
