SystemAir SQ Serie Manual De Instalación página 27

To make water connections to the heat exchanger or the valves
use threaded joints and suitable materials that can ensure perfect
tightness.
The unit is provided with inlet and outlet female connections for
both 2 and 4 pipe models. An air bleed valve is also provided (See
fig. 26), which can be adjusted using an 8 mm wrench.
Connections
Models
dimension (Ø)
SQ 20 3/4"
3/4"
SQ 30
3/4"
SQ 40
1/2"
SQ 20*
1/2"
SQ 30*
1/2"
SQ 40*
*Hot water circuits, four-pipe version
Connections
Models
dimension (Ø)
SQ 50 1"
1"
SQ 60
1"
SQ 70
SQ60* 3/4"
SQ70* 3/4"
Water connections
To drain the unit completely, refer to "SYSTEM DRAINAGE" in
the Maintenance section.
Checking
On the unit startup, check if water flows correctly from the pump or
check the pipe slope and make sure the pipes are not obstructed.
SQ 27