Section 3 - Pre-Installation Checks
PRE-INSTALLATION
25
Installation and Maintenance
3.2.2 System Expansion
ᘐ WARNING:
Failure to appropriately protect against
system expansion may lead to catastrophic failure of the
system circuit, major property damage and serious harm
to dwelling inhabitants. It must be made sure that it is
impossible to isolate the expansion vessel from the system.
Refer to BS EN 12828 - Heating systems in buildings - Design
for water-based heating systems; when determining the
accurate size of the Expansion Vessel . It must be made
sure that the installed expansion vessel is large enough to
accommodate the system volume.
If glycol is used a correction factor should be applied to
3.2.3 Maximum Pipe Length
Primary pipework must be correctly designed and installed to
3.2.4 Water Quality Requirements
ᘐ WARNING: Make sure that water intended for human
consumption complies with EU Directive 98/83/EC.
ᘐ CAUTION: Due to the lower operating temperatures,
it is recommended that heat pump systems have
additional protection against oxidation and aggressive
chemicals.
ᘐ CAUTION: Failure to adequately dose the heating
systems corrosion inhibitor will lead to the gradual
deterioration of the system performance over time and
reduce both the lifespan and eciency of the product.
System water is to be cleaned, treated, tested, and maintained
in accordance with BS 7593:2019 - Code of practice for the
preparation, commissioning, and maintenance of domestic
central heating. Record water quality test results in the
Benchmark Section at the rear of the book.
include a HP290 pre-plumbed cylinder an appropriately sized
Heat Pump to prolong the life expectancy of the system.
3.2.5 System Water Antifreeze Protection
ᘐ WARNING: Do not use mono ethylene glycol. Use
Propylene glycol only.
ᘐ CAUTION: Where any circuit pipework is exposed
to ambient temperatures of < 5 °C, antifreeze protection
must be installed. Failure to install adequate antifreeze
protection methods may lead to damage to the system.
Damage to systems which do not have adequate
antifreeze protection methods is not covered by warranty.
When the Heat Pump is exposed to freezing temperatures, the
primary heating circuit must either be:
• Charged with a glycol water mixture, refer to Section
5.2.2.4.
• Installed with antifreeze protection valves on both the inlet
and outlet of the Heat Pump refer to Section 5.2.2.3.
ᘐ WARNING: Do not install antifreeze valves if the
system has been charged with glycol or vice versa.
All exterior pipework must be insulated with UV resistant and
water proof pipe lagging.
charged with Glycol.
3.3 HEAT PUMP - INSTALLATION AREA
ᘐ CAUTION: The product is not to be obstructed by
any surrounding objects or surfaces as this can limit
access and adversely aect performance. The minimum
clearances that are shown in Figure 3 should be always
maintained.
ᘐ WARNING: The installation area should always be
kept clear of ignition sources, including but not limited
to; electrical switches, electrical plug sockets, and lamps.
ᘐ WARNING: Mounting structures and xtures must
be capable of supporting the weight of the product and
its accessories. Product weights without accessories are
as follows 4.5kW - 6kW; 90kg, 8kW; 117kg, 10kW - 14kW;
135kg.
The proposed installation site should be explained, discussed,
and agreed with the client prior to the start of installation,
making them aware of blowing cold air, potential condensate
build up, noise emissions, and vibration.
The heat pump must be installed outdoors, preferably in
a sunny location. It is acceptable to install the product
underneath a protective roof and/or surrounded by some walls
and surfaces, providing that the installation requirements and
clearances are maintained. The product must be accessible
for maintenance activities.
National regulations regarding noise emissions should be
obeyed. When selecting a site, reverberation of noise against
surfaces should be considered, especially in areas where the
heat pump is adjacent to multiple walls.
It should also be made sure that the cold air does not cause
installation site.
Routing of pipework, electrical cables and condensate
disposal method should be considered and accounted for
when selecting the installation site.
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