Biddle STYLE2 Series Installation Operation & Maintenance page 15

INVISIDOR STYLE AIR CURTAIN: Installation, Operation & Maintenance Instructions
2
Each Style LPHW air curtain is fitted with the 3 port valve inside the casing of the air curtain. For two
2
air curtains in a stack each air curtain requires its own separate water flow and return connection.
In order to obtain optimum heat output, all air from the system and the heating coil must be vented.
Version 5.0 (Original Manual) Page | 15