Daikin Altherma 3 R F Installer's Reference Manual page 100

8 | Piping installation
Installer reference guide
100
89°C
b
j k
a c d
e
a Outdoor unit
b Indoor unit
c Heat exchanger
d Backup heater
e Pump
f Stop valve
g Motorised 3-way valve
h Motorised 2-way valve (field supply)
i Collector
j Domestic hot water tank
k Heat exchanger coil
FCU1...3 Fan coil unit (optional) (field supply)
FHL1...3 Floor heating loop (field supply)
T Room thermostat (optional) (field supply)
▪ Drainage – Low points. Provide drain taps at all low points of the system in order
to allow complete drainage of the water circuit.
▪ Drainage – DHW pressure relief valves. Provide a proper drain for the pressure
relief valves (of both the domestic hot water tank and the domestic hot water
tank kit) to avoid water spillage around the unit. For the discharge piping
connected to these valves, respect the requirements from the table below. For
more information, see
4
water" [ 108].
Pressure relief valve diameter
Discharge pipe diameter (to pressure relief valve)
Discharge piping diameter (from tundish)
Discharge piping material (from tundish)
Vertical length below tundish, before first elbow or bend
Continuous fall after first elbow or bend
(a)
Maximum resistance
Resistance created by each elbow or bend
75°C
FCU1
g f h
FCU2
M
f
M
FHL1
FHL2
"8.6.4 To connect the water piping for domestic hot
Item
i
i
FCU3
i
i
FHL3
Requirement
15 mm
15 mm
22 mm
Metal
≥300 mm
≥1:200
≤9 m
0.8 m
ERGA04~08EA + EHVH04+08SU18+23EA
Daikin Altherma 3 R F
4P629090-1A – 2021.11