Can the DualSun Spring be installed in portrait or landscape mode (or both)?

The DualSun Spring panel can be installed:

• in portrait (in this case the panels have to be connected hydraulically in horizontal rows)
• in landscape (in this case the panels have to be connected hydraulically in vertical columns)

NB: the DualSun Spring panel is drainback-compatible only when it is installed in portrait mode; it is not drainback-compatible in landscape mode.