Connection; To Change The 60/100 Concentric Connection To A Dual Pipe Connection; Calculate The Total Piping Length - Daikin CHYHBH05AA Installer's Reference Manual

b
a
a Gas exhaust measuring point
b Air intake measuring point
The air supply and the flue pipe can also be connected separately as
a dual pipe connection. An option to change the gas boiler from a
concentric to a dual pipe connection is available.
NOTICE
When installing the gas exhaust take the installation of the
outdoor unit into account. Make sure the exhaust gases
are not sucked into the evaporator.
When installing the gas exhaust and the air intake, take
into account the serviceability of the indoor unit. When the
gas exhaust/air intake goes backwards over the indoor
unit, the expansion vessel cannot be accessed and, if
necessary, will have to be replaced outside the unit.
7.12.1 To change the gas boiler to 80/125
concentric connection
The concentric connection can be changed from Ø60/100 to
Ø80/125 by an adapter set.
1 Remove the concentric pipe from the air supply and combustion
gas pipe at the top
counterclockwise.
2 Remove the O-ring from the concentric pipe and fit it around the
flange of the concentric adapter Ø80/125.
3 Place the concentric adapter in the top of the appliance and
turn it clockwise so that the measurement nipple points straight
forward.
4 Fit the concentric pipe for the air supply and combustion gas
flue into the adapter. The integral sealing ring ensures an
airtight connection.
5 Check the connection of the internal flue pipe and the
condensate collector. Make sure it is properly connected.
CHYHBH05+08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
of the gas boiler by turning
7.12.2 To change the 60/100 concentric
connection to a dual pipe connection
The concentric connection can be changed from Ø60/100 to a dual
pipe connection 2× Ø80 by an adapter set.
1 Remove the concentric pipe from the air supply and combustion
gas pipe at the top
counterclockwise.
2 Remove the O-ring from the concentric pipe and fit it around the
flange of the dual pipe adapter Ø80.
3 Place the combustion gas connection (Ø80) in the top of the
appliance and turn it clockwise so that the measurement nipple
points straight forward. The integral sealing ring ensures an
airtight connection.
4 Remove the lid from the air supply connection. Make sure to
properly connect the air intake. Room air dependent installation
is NOT allowed.
5 Check the connection of the internal flue pipe and the
condensate collector. Make sure it is properly connected.
7.12.3

Calculate the total piping length

When the resistance of the flue pipe and air supply pipe increase,
the appliance power will decrease. The maximum permitted
reduction in power is 5%.
The resistance of the air supply pipe and combustion gas flue
depends on:
▪ the length,
▪ the diameter,
▪ all components (bends, elbows,...).
The total permitted pipe length of the air supply and the combustion
gas flue is indicated for each appliance category. For dual pipe
connection, the indication of pipe length is based on Ø80 mm.
Equivalent length for concentric installation (60/100)
Bend 90°
Bend 45°
7 Installation
of the gas boiler by turning
Length (m)
1.5
1
Installer reference guide
39