Duct-Type Installation - Honeywell 90DM4 Manuel De L'utilisateur

Duct-type Installation

The 90DM4 may be duct-mounted. It will operate most effectively when
the airspeed is between 500 and 4,000 ft/minute (2.5 to 20.3 m/sec),
and it may be installed to monitor either incoming fresh air or outgoing
exhausted air. In order to optimize its operation we recommend
installation on a straight section of duct 3 feet (1 m) away from any
curved ductwork.
Figure 3: Duct Mount Installation Diagram
1. Drill a 3 cm (1.18 in.) opening for the sampling tube.
2. Insert the sampling tube with its lateral air holes into the appropriate
opening, orienting the air holes ( FLOW indication) to face the
airflow.
3. Knock out the rear hole of the octagonal box
4. Place the box on the plastic plate. (The box mounting holes must be
vertically oriented).
5. Mount the box with two #8 metal screws.
6. Install the electric wire in the octogonal box.
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90DM4 User Manual
Honeywell
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Introduction
Installation Instructions
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