55
Opening the air vent valve for DHW heating
1.
2.
4.
3.
Fig. 50
Checking the expansion vessel and heating circuit pressure
Observe engineering information.
Technical guides for heat pumps
Cleaning the DHW cylinder
Danger
Uncontrolled escape of DHW or heat transfer
medium can cause scalding and building dam-
age.
Only open DHW and heating water connections
with a depressurised DHW cylinder.
!
Please note
Negative pressure in the DHW cylinder can
cause material damage.
The air vent valve must always be open when
draining the DHW cylinder with a vacuum pump.
!
Please note
Pointed or sharp-edged objects will damage the
DHW cylinder.
Use only suitable cleaning utensils to clean the
cylinder.
!
Please note
Cleaning agents containing hydrochloric acid
attack the DHW cylinder material.
Only use pH-neutral cleaning agents.
Commissioning, inspection, maintenance
Filling and venting the secondary side
(cont.)
5776 028 GB
Summary of Contents for AWT 221.A04
Page 77: ...77 Maintenance Checking the fuses cont 5776 028 GB Maintenance...
Page 87: ...87 Indoor unit parts lists Indoor unit hydraulics cont 5776 028 GB Components...
Page 90: ...90 Indoor unit parts lists Indoor unit cylinder cont 5776 028 GB Components...
Page 137: ...137 Wind direction 11 Wind loads 11 Keyword index Keyword index cont 5776 028 GB...
Page 138: ...138 5776 028 GB...
Page 139: ...139 5776 028 GB...
