Function Of The 3-Way Switch Valves - Daikin Altherma 3 ECH2O Installation And Maintenance Instructions Manual

Item Designation
1 Solar - inflow
2 Cold water connection
3 Domestic hot water
4 Heating inflow
5 Heating return flow
6 Circulation pump
7 Pressure relief valve
7a Non-return valve (ac-
cessory)
8 Automatic vent valve
9 Storage tank (polypropyl-
ene double walled jacket
with PUR hard foam heat
insulation)
10 Filling and draining con-
nection or solar return
flow connection
11 Mount for solar controller
or handle
12 Heat exchanger (stain-
less steel) for domestic
hot water heating
13 Heat exchanger (stain-
less steel) for storage
tank charging or heating
support
14 Biv heat exchanger
(stainless steel) for char-
ging with external heat
generator (e.g. pressur-
ised solar system)
15 Connection for optional
electrical backup heater
EKBUxx
16 Solar - inflow layering
pipe
17 Fill level indicator (tank
water)
18 Optional: electric backup
heater (EKBUxx)
19 Submersible sensor
sleeve for storage tank
temperature sensor t
DHW1
and t
DHW2
20 Pressure-free storage
tank water
21 Solar zone
22 Hot water zone
23 Safety overflow connec-
tion
24 Mount for handle
Tab. 3-1 Legend for Fig. 3-1 to
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
Item Designation
25 Type plate
26 Protective cover
27 Solar - return flow
28 Biv - inflow
29 Biv - return flow
30 Plate heat exchanger
31 Connection for refrigerant
fluid line
32 Connection for refrigerant
gas line
33 Status display
34 Ball valve (heating cir-
cuit)
35 Combined filling and
draining valve (heating
circuit)
37 Storage tank temperature
sensor
t ,
DHW1
t
DHW2
38 Connection for dia-
phragm expansion vessel
39 Control system housing
3UVB 3-way switch valve (in-
1 ternal heat generator cir-
cuit)
3UV 3-way switch valve (hot
DHW water/heating)
DS Pressure sensor
FLS FlowSensor
t Return flow temperature
R
sensor
t Inflow temperature
V
sensor
t Backup heater inflow
V, BH
temperature sensor
RoCon Controller control panel
+ B1
EKS- Optional: Solar control
RPS4 and pump unit
MAG Diaphragm expansion
vessel
Fig. 3-4
3
3.2 Function of the 3-way switch
valves
Fig. 3-5 3-way switch valve function
Product description
Installation and maintenance instructions
11