To Provide Drainage For The Pressure Relief Valve; To Protect The Water Circuit Against Freezing - Daikin Altherma EJHA04AAV3 Installation Manual
Hybrid monobloc heat pump module
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Also See for Altherma EJHA04AAV3:
- Installer's reference manual (112 pages) ,
- Operation manual (16 pages) ,
- User reference manual (60 pages)
Table of Contents
5 Installation
NOTICE
Drain/fill point. Foresee a drain/fill point to drain or fill the
space heating circuit. The fill/drain point can be:
▪ Field supplied
▪ In case of *HY2KOMB28+32AA gas boiler: Part of
option EKFL1A (filling loop kit)
▪ In case of third-party gas boiler: Part of the existing
installation
NOTICE
Do NOT install valves to shut down the entire emitter
system (radiators, floor heating loops, fan coil units, ...)
instantly if this can result in an immediate short circuit of
the water flow between the outlet and the inlet of the unit
(for example via a bypass valve). This may trigger an error.
a
Water inlet (G1")(coming from the heat emitters)
b
Water outlet (G1")(going to the gas boiler in case of
*HY2KOMB28+32AA gas boiler)
c1~c3
Parts of option EKBALLV1
c1: O-rings
c2: Shut‑off valve
c3: Shut‑off valve with integrated connection for the
vacuum breaker (if applicable)
1 Connect the O-rings and shut-off valves.
2 Connect the field piping on the shut-off valves.
3 In case of connection with the optional domestic hot water tank,
see the installation manual of the domestic hot water tank.
NOTICE
In case of a third-party gas boiler: Install a manometer in
the system.
NOTICE
Install air purge valves at all local high points.
NOTICE
In case an optional domestic hot water tank is installed: A
pressure relief valve (field supply) with an opening
pressure of maximum 10 bar must be installed on the
domestic cold water inlet connection in accordance with
the applicable legislation.
Installation manual
12
a
b
c1
c2
c3
5.3.2
To provide drainage for the pressure relief
valve
NOTICE
If overpressure occurs, the system will release some of the
liquid through the pressure relief valve. The pressure relief
valve of the outdoor unit is designed to open at 3 bar.
If glycol was added to the system, take adequate
measures to safely recover it when the pressure relief
valve opens.
In any case, make sure that the flexible hose of the
pressure relief valve is ALWAYS free to release pressure.
a
Pressure relief valve
b
Flexible hose (drain)
1 Open the top plate, front plate, and rear plate. See
open the outdoor unit" on
page 9.
2 Make a cross-cut in the rubber grommet on the rear plate.
3 Route the flexible hose through the grommet.
4 Close the rear plate.
5 Pull the flexible hose with a light force to make sure that the
flexible hose slopes down. This prevents water from staying
and/or freezing inside the hose.
6 Close the front plate and top plate.
7 If glycol was added to the system, take adequate measures to
safely recover it when the pressure relief valve opens.
5.3.3
To protect the water circuit against
freezing
About freeze protection
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions, that include the activation of pump in case of low
temperatures.
However, in case of a power failure, these functions cannot
guarantee protection.
Do one of the following to protect the water circuit against freezing:
▪ Add glycol to the water. Glycol lowers the freezing point of the
water.
▪ Install freeze protection valves. Freeze protection valves drain the
water from the system before it can freeze.
NOTICE
If you add glycol to the water, do NOT install freeze
protection valves. Possible consequence: Glycol leaking
out of the freeze protection valves.
Freeze protection by glycol
Daikin Altherma hybrid monobloc – Heat pump module
a b
"5.1.1 To
EJHA04AAV3
4P530607-1B – 2018.10
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