Engineered air DG series Manual de usuario descargar pdf (Pagina 15)

A SH / S-TRAC MANUAL

15 of 29 Feb 06

Freeze Protection

Outdoor equipment will normally be supplied with an electric heater installed in the humidifier section. A

temperature control will energize the heater at 40°F (4°C). A low limit will disable the humidifier to initiate a

drain cycle at 35°F (2°C) to help protect the humidifier from freezing damage. A dry contact, available to

control a solenoid valve to drain the water supply line, will open as well.

Drain Connection

Drain water temperatures will normally be tempered by mixing supply water with the hot drain water to a

leaving temperature between 120°F (49°C) and 140°F (60°C). In the event of a power failure, near boiling

water could enter the drain line. If using nonmetallic drain piping, it must be rated to withstand 212°F

(100°C).

The drain line must not be trapped or valved and must gravity drain to an open indoor drain, with a 1” (25)

air gap.

Steam Line

Do not use plastic material for the steam line. The steam line is hot and should be properly insulated to

reduce heat loss and provide protection against personal injury.

The steam line should not exceed 50ft (15.3m) equivalent. The steam line must be sloped at 2% grade

back towards the humidifier and must not be trapped. For installations with a steam line greater than 50ft

(15.3m) equivalent consult Engineered Air.

Condensate Line

Do not use plastic material for the condensate line.

Where possible the SORB distribution grid condensate line should sloped at 2% grade back towards the

humidifier. Refer to the grid installation drawing included in the submittal for trapping requirements. This

stub is welded closed at the factory, but may be opened for connection as required. If the condensate line

cannot be returned to the humidifier it must be piped to a drain.

Multiple SORB distribution grids require multiple condensate lines.

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Engineered air DG series Manual de usuario Pagina 15