DOL 534 • DOL 539
Circuit Diagrams and Cable Plans
75
5.19.1 MultiStep
Recirculation
Recirculation fans are connected to external fan speed controller DOL 31 or internal fan speed controllers.
.
See diagrams in section
Internal fan speed controller, two parallel fans [
Air supply
.
Air intake
See diagrams in section
.
Air outlet
The air outlet is connected as an ordinary MultiStep.
See diagrams in section
.
5.19.2 Stepless
Recirculation
Recirculation fans are connected to internal fan speed controllers or external fan speed controllers.
See diagrams in section
.
Inlet and outlet
Fans for both inlet and outlet are connected to external fan speed controller DOL 31.
.
Air intake
See diagrams in section
.
Air outlet
See diagrams in section
.
Summary of Contents for DOL 539
Page 2: ......