Daikin EKHWSU250D3V3 [10/24] To fill the domestic hot water tank
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Daikin EKHWSU250D3V3 [10/24] To fill the domestic hot water tank

Daikin EKHWSU300D3V3 [10/24] To fill the domestic hot water tank
6 Installation
Installation manual
10
EKHWSU150~300D3V3 + EKEXPVES
Domestic hot water tank with option kit for air to water heat pump
system
4P510673-1B – 2018.01
2 Install the adapter to the cold water connection of the domestic
hot water tank.
3 Loosely fit the elbow/drain valve to the bottom pipe end of the
G3 kit.
4 Install the G3 kit loosely on the clamps.
5 Install the tundish pipe to the temperature and pressure valve.
NOTICE
The temperature and pressure valve is factory installed on
the tank. Do NOT remove the temperature and pressure
valve.
Prerequisite: Check good fit and position of all parts of the G3 kit.
6 Tighten the loose fittings : both fittings of the tundish pipe and
both fittings of the elbow/drain valve.
7 Tighten the clamps that hold the G3 kit.
8 Connect the cold water mains to the pipe work.
9 Connect the hot water outlet from the tank to the hot water
means of the house.
10 Connect a metal discharge pipe from the tundish. Refer to
"Discharge piping requirements" in this chapter. All pipework
must have a continuous fall and be fitted conform to the
requirements of the Building Regulation G3.
11 The expansion vessel must be connected to the valve block:
remove the plug (¾ – female) (see illustration below) and use
appropriate pipework to connect the expansion vessel in a
vertical position and fully supported for its weight.
12 After completing the installation, the installer has to fill in the
warning label on the tank with indelible ink. Refer to
"12.3Outlook diagram"on page19 for location of the warning
label.
6.4.4 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.
5 Manually operate the temperature and pressure relief valve of
the domestic hot water tank to ensure a free water flow through
the discharge pipe.
NOTICE
To operate the system, the domestic hot water tank needs
to be filled completely. Turning on the system when the
tank is not full can damage the integrated booster heater
and cause electrical errors.
6.4.5 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent reduction of the heating capacity.
6.4.6 To connect the 3-way valve
1 Unpack the 3‑way valve body and 3‑way valve motor and verify
that the following accessories are provided with the motor.
a b c
d
a Sleeve
b Valve motor cover
c Screw
d Scale
2 Connect the 3‑way valve body to the water inlet of the backup
heater, in accordance with one of the following four
configurations. Position the shaft in such a way that the motor
can be mounted and replaced.
1
2
3
1
3
2
1
2
3
1
3
2
E3
E1 E2
E4
1 From outdoor unit
2 To bypass
3 To backup heater
3 Put the sleeve on the valve and turn it until the valve is
positioned as in the figure below. It should be blocking the
outlet connection to the bypass for 50% and the outlet
connection to the backup heater for 50%.

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