Heatrae Sadia ELECTROMAX SOLAR Installation & Servicing Instructions Manual page 58

8.3 DRAINING THE SOLAR PRIMARY CIRCUIT
The Electromax Solar circuit system should only be drained when there is no direct radiation
from the sun. If direct radiation is likely to occur the collector/s should be shaded by covering
them during draining.
To drain the complete solar primary circuit (including collectors):
1. Turn the handles of both solar check valves so they are at 45°.
2. Connect a hose to the solar drain valve and secure in place with hose clip. Open the solar
drain valve and allow the heat transfer fluid to drain into a suitable container.
To partially drain the solar primary circuit (not the collectors):
1. Turn the handles of both solar check valves so are horizontal to the pipework.
2. Connect a hose to the solar drain valve and secure in place with hose clip. Open the solar
drain valve and allow the heat transfer fluid to drain into a suitable container.
FIGURE 36: DRAIN POINTS
SOLAR DRAIN
CENTRAL HEATING
DRAIN
58
DOMESTIC HOT
WATER DRAIN