Daikin Altherma EAVH16S18DA6V, Installation Manual

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4 Installation
Installation manual
9
EAVH/9W
Daikin Altherma – Low temperature split
4P556067-1 – 2018.10
NOTICE
Glycol absorbs water from its environment. Therefore do
NOT add glycol that has been exposed to air. Leaving the
cap off the glycol container causes the concentration of
water to increase. The glycol concentration is then lower
than assumed. As a result, the hydraulic components
might freeze up after all. Take preventive actions to ensure
a minimal exposure of the glycol to air.
WARNING
Due to presence of glycol, corrosion of the system is
possible. Uninhibited glycol will turn acidic under the
influence of oxygen. This process is accelerated by the
presence of copper and high temperatures. The acidic
uninhibited glycol attacks metal surfaces and forms
galvanic corrosion cells that cause severe damage to the
system. Therefore it is important that:
▪ the water treatment is correctly executed by a qualified
water specialist,
▪ a glycol with corrosion inhibitors is selected to
counteract acids formed by the oxidation of glycols,
▪ no automotive glycol is used because their corrosion
inhibitors have a limited lifetime and contain silicates
which can foul or plug the system,
▪ galvanized pipes are NOT used in glycol systems since
the presence may lead to the precipitation of certain
components in the glycol's corrosion inhibitor.
Adding glycol to the water circuit reduces the maximum allowed
water volume of the system. For more information, refer to the
chapter "To check the water volume and flow rate" in the installer
reference guide.
NOTICE
If glycol is present in the system, setting [E-0D] must be
set to 1. If the glycol setting is NOT set correctly, the liquid
inside the piping can freeze.
Freeze protection by freeze protection valves
When no glycol is added to the water, you can use freeze protection
valves to drain the water from the system before it can freeze.
▪ Install freeze protection valves (field supply) at all lowest points of
the field piping.
▪ Normally closed valves (located indoors near the piping entry/exit
points) can prevent that all water from indoor piping is drained
when the freeze protection valves open.
NOTICE
When freeze protection valves are installed, do NOT select
a minimum cooling setpoint lower than 8°C (8°C=default).
If lower, freeze protection valves can open during cooling
operation.
Consult the installer reference guide of the unit for more detailed
information.
Heater tape (field supply)
1 Install heater tape to the outdoor field piping.
2 Provide external power supply for the heater tape.
NOTICE
▪ For the internal heater tape to operate, the power to the
unit MUST be ON. For this reason, during cold periods,
never disconnect the power, nor turn off the main
switch.
▪ In case of a power failure, power to the heater tape
(both internal and external) will be aborted and the
water circuit will NOT be protected. To guarantee a full
protection, it is always possible to add glycol to the
water circuit or to use freeze protection valves, even
when installing heater tape to the outdoor field piping.
4.3.5 To fill the domestic hot water tank
1 Open every hot water tap in turn to purge air from the system
pipe work.
2 Open the cold water supply valve.
3 Close all water taps after all air is purged.
4 Check for water leaks.
4.3.6 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
For the outdoor piping insulation, refer to the installer reference
guide or the installation manual of the outdoor unit.
4.4 Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
4.4.1 About electrical compliance
Only for the backup heater of the indoor unit
See "4.4.4 To connect the backup heater power supply" on
page 11 .
4.4.2 To connect the electrical wiring on the
indoor unit
1 To open the indoor unit, see "4.1.1 To open the indoor unit" on
page 5 and "4.1.2 To open the switch box cover of the indoor
unit" on page 6 .
2 The wiring enters the unit from the top:
b+c a d
a, b, c Field wiring (see table below)
d Factory-mounted cable for power supply of backup heater
3 Routing of the wiring inside the unit should be as follows. Fix
the cable to the cable rail using cable ties: