Viessmann Vitocal 222-A - Page 28

28
5. Check the internal and on-site hydraulic connec-
tions for leaks.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
In the event of leaks, drain off liquid via the
drain valve. Check the seating of seal rings.
Always replace displaced seal rings.
Note
The secondary circuit air vent valve is located in
the indoor unit. To vent, connect the hose to the
secondary circuit air vent valve and route out-
wards.
Observe additional information regarding filling and
venting: See "Filling and venting on the secondary
side".
6. Thermally insulate lines inside the building. For
heat pumps with a cooling function, use thermal
and vapour diffusion-proof insulation.
Pipework inter-
nal
7
Min. thickness of thermal in-
sulation layer with
λ = 0.035 W/(m·K)
≤ 22 mm 40 mm
> 22 mm 60 mm
λ Thermal conductivity
Note
Ensure the minimum volume and minimum flow rate in
the secondary circuit: See following table.
Vitocal 222-A Type Minimum heating
system volume
in l
*1
Minimum flow rate
in l/h
Secondary circuit
pipework minimum
diameter
230 V applian-
ces
■
AWOT-M-E
■
AWOT-M-E-
AC
221.A04
40
*2
/50
700 DN 25
221.A06
40
*2
/50
700 DN 25
221.A08
40
*2
/50
700 DN 25
221.A10
40
*2
/50
1400 DN 32
221.A13
40
*2
/50
1400 DN 32
221.A16
40
*2
/50
1400 DN 32
400 V applian-
ces
■
AWOT-E
■
AWOT-E-AC
221.A10
40
*2
/50
1400 DN 32
221.A13
40
*2
/50
1400 DN 32
221.A16
40
*2
/50
1400 DN 32
*1
Cannot be fitted with shut-off devices
*2
In conjunction with Vitocell 100-E, type SVPA, part no. ZK03801
Installation sequence
Connecting the secondary circuit (cont.)
5831412
Installation