Connecting The Water Piping; To Connect The Water Piping; To Connect The Recirculation Piping; To Connect The Drain Hose - Daikin EGSQH10S18AA9W Installation Manual

4 Installation
Consider that the brine circuit piping inside the house can/will
condensate. Foresee adequate insulation for these pipes.
4.4

Connecting the water piping

4.4.1

To connect the water piping

NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
1 Connect the domestic hot water in and out pipes to the indoor
unit.
a c d
a Space heating water out
b Space heating water in
c Domestic hot water out
d Domestic cold water in (cold water supply)
NOTICE
It is recommended to install shut-off valves to cold water in
and hot water out connections. Shut-off valves are field
supplied.
2 Connect the space heating in and out pipes to the indoor unit.
NOTICE
Install air purge valves at all local high points.
4.4.2

To connect the recirculation piping

Prerequisite: Only required if you need recirculation in your system.
1 Loosen and remove the screws at the bottom of the unit.
2 Slide the front panel of the unit downwards and remove it.
3 Loosen and remove the 4 screws that fix the top panel.
4 Remove the top panel from the unit.
a Knock-out hole
b Connection for recirculation piping
5 Remove the knock-out hole at the backside of the unit.
6 Connect the recirculation piping to the recirculation connection
and route the piping through the knock-out hole at the backside
of the unit.
7 Re-attach the insulation and casing.
Installation manual
8
b
a
b
4.4.3

To connect the drain hose

Condensate can form on the brine components inside the
compressor department of the unit. The unit contains a drain pan.
Depending on room ambient temperature, room humidity and
operation condition, the drain pan can overflow. A drain hose is
supplied with the unit.
The drain hose is routed to the backside on the left, close to the
bottom of the unit. A field supplied drain pump might be needed to
pump the water away to the field drain.
4.4.4

To fill the space heating circuit

1 Connect the water supply hose to the fill valve (field supply).
2 Open the fill valve.
3 Make sure that the automatic air purge valve is open (at least 2
turns).
4 Fill the circuit with water until the manometer indicates a
pressure of ±2.0 bar.
a
a Water manometer
5 Purge as much air as possible from the water circuit.
NOTICE
▪ Air in the water circuit can cause malfunctioning of the
backup heater. During filling, it may not be possible to
remove all the air from the circuit. Remaining air will be
removed through the automatic air purge valves during
the initial operating hours of the system. Additional
filling with water afterwards may be required.
▪ To purge the system, use the special function as
described in the chapter
page 20. This function should be used to purge the
heat exchanger coil of the domestic hot water tank.
6 Close the fill valve.
7 Disconnect the water supply hose from the fill valve.
4.4.5

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.
5 Manually operate the field-installed pressure relief valve to
ensure a free water flow through the discharge pipe.
"6 Commissioning" on
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351747-1F – 2016.06