Table of Contents
Advertisement
INSTALLATION
70
Frost protection by antifreeze valve
About antifreeze valve
This is a valve to prevent freeze in winter. When no antifreeze is added to the water, you can use
antifreeze valves at all lowest points of the field piping to drain the water from the system before
it can freeze
To install antifreeze valve
To protect the field piping against freezing, install the following parts:
a
a Automatic air intake
b Antifreeze valve (Optional – field supply)
c Normally closed valves (recommended – field supply)
Part
An automatic air intake (for air supply) should be installed at the highest point.
a
For example, an automatic air purge.
Protection for the field piping. The antifreeze valve must be installed:
• Vertically to allow water to flow out properly and free from obstructions.
b
• At all lowest points of the field piping.
• In the coldest part and away from heat sources.
Isolation of water inside the house when there is a power interruption.
Normally closed valves (located indoors near the piping entry/exit points) can
prevent that all water from indoor piping is drained when the antifreeze valve
open.
s
• When there is a power interruption: The normally closed valves close and
isolate the water inside the house. If the antifreeze valve open, only the
c
water outside the house is drained.
• In other circumstances (example: when there is a pump failure):
The normally closed valves remain open. If the antifreeze valve open, the
water from inside the house is also drained.
Outdoor
Indoor
C
b
C
b
Description
Advertisement
Table of Contents
