Checking The Brine Level; Checking The Water Level In The Heating System - Danfoss DHP-H User Manual

6 .2

Checking the brine level

The brine circuit must be filled with the correct amount of fluid otherwise the installation
may become damaged.
The brine must be topped up when the level drops so that it is no longer visible in the expansion tank.
During the first month of operation the brine level might drop a little, which is quite normal.
The fluid level may also vary depending on the temperature of the heat source. Under no
circumstances, however, must the fluid level be allowed to drop so much that it is no longer
visible in the expansion tank.
For DHP-A with pressurized brine circuit the manometer on the expansion tank must show
approx. 1.0 bar, see figure in section "Installation principle, DHP-A" for more information
about the location of the expansion tank.
Always call your installer for refilling of brine, see the "References" section.
6 .3

Checking the water level in the heating system

The line pressure of the installation must be checked once a month. The external manom-
eter must show a value between 1-1. bar. If the value is below 0.8 bar, when the water in
the heating system is cold, the water must be topped up (applies in the event of an empty
expansion tank). See the "Piping installation (principle solution)" section for information on
where the manometer is located.
You can use normal tap water when topping up the heating system. In certain exceptional
cases the water quality may be so poor (for example very hard water) that it is not suitable for
filling the heating system. If unsure, contact your installer, see the "References" section.
⚠
Do not use any additives for water treatment in the heating system's water!
Danfoss – 
Level too low
Figure 19: level in expansion tank .
VUBMA102
Level correct