Daikin EKHWS-BA3Z2, Installation Manual

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Installation manual
2
EKHWS150~30 E300BA3Z2
Domestic hot water tank for air to water heat pump system
4P610547-1 – 2020.01
I
NSTALLATION OF THE
EKHWS
DOMESTIC HOT
WATER TANK
In case of limited consumption of domestic hot water, e.g. at holiday
residences or at houses that are occasionally not occupied, the
domestic hot water tank installation must be fitted with a shunt pump.
■
The shunt pump can be time-controlled,
■
the shunt pump must operate to circulate the complete volume
of the domestic hot water tank 1.5 times per hour,
■
and the shunt pump must operate, or be programmed for
operation, during 2 uninterrupted hours per day at least.
In case of very long field water piping between the domestic hot
water tank and the hot water end point (shower, bath, etc.) it can take
more time before the hot water from the domestic hot water tank
reaches the hot water end point.
If required connect a recirculation pump in between the hot water end
point and the recirculation hole in the domestic hot water tank.
Following descriptions are only for EKHWS*V3 and
EKHWS*Z2 models, not for EKHWSU*V3 models
Main components ■
The total system (indoor unit
and outdoor unit) is designed for combination with an
domestic hot water tank. In case
another tank is being used in combination with the
indoor unit, Daikin cannot
guarantee neither good operation nor reliability of the
system. For those reasons Daikin cannot give
warranty of the system in such case.
■
The equipment is not intended for use in a potentially
explosive atmosphere.
■
Domestic hot water quality must be according to EN
directive 98/83 EC.
■
A drain device should be installed on the cold water
connection on the domestic hot water tank.
■
For safety reasons, it is not allowed to add ethylene
glycol to the water circuit. Adding ethylene glycol
might lead to contamination of the domestic water if a
leakage would occur in the heat exchanger coil.
■
It is important that the storage capacity of the
domestic hot water tank meets normal daily
fluctuations in consumption of domestic hot water
without any fall of the water outlet temperature during
use.
■
Immediately after installation, the domestic hot water
tank must be flushed with fresh water. This procedure
must be repeated at least once a day the first
5 consecutive days after installation.
1 Cold water connection
2 Hot water connection
3 Shunt pump
(field supply)
4 Non-return valve
(field supply)
1
2 3
4
2
1
1 Shower
2 Recirculation pump
1 Field supply
2 Hot water connection
3 Pressure relief valve connection
4 Pressure relief valve (field supply)
5 Electrical box
6 Electrical box lid
7 Recirculation hole
8 Thermistor socket
9 Flow inlet connection
10 Heat exchanger coil
11 Return outlet connection
12 Cold water connection
13 Threaded thermistor hole
4PEN610457-1.book Page 2 Tuesday, February 25, 2020 4:15 PM