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Installation
Nortec EL/RS Outdoor
2584597_B_EN_1705
5.6.3 Water Connections Checklist
Check the following to ensure that the water connections for the outdoor humidifier have been installed
properly.
Water and drain lines installed to local plumbing codes?
Shutoff valve and union fitting installed in supply line?
Water supply piping minimum 1/2 in (13 mm) diameter, and routed through a pipe chase to the unit?
Optional 5 μm water filter installed in the water supply line (inside the building) close to the humidifier?
Water supply surge-free and pressure regulated to 30-80 psig (207-550 kPa)?
Water temperature 34-104°F (1-40°C) for EL-OC unit, and 140°F (60°C) for RS-OC unit?
Cold potable drinking water only (not RO or DI) for EL-OC unit?
For EL-OC unit, is conductivity of the water 150-1200 micro-seimens/cm, hardness 0-12 gpg (when
Silica is between 0-4 ppm), or 0-3 gpg (when Silica is between 4-14 ppm), and pH 7-7.5?
For RS-OC unit, is conductivity of the water 1-1500 micro-seimens/cm, hardness 0-12 gpg, Silica
0-12 ppm, pH 6.5-7.5 pH, and chloride 0-50 ppm?
If the unit is installed in a cold climate, are the freeze protection valves (normally-open and a normally-
closed valve, or a 3-way normally-closed valve) installed inside building?
All drain lines routed through the bottom panel in the unit through a pipe chase to the air gap funnel?
All gaps around the drain lines sealed where they pass through the bottom panel in the unit?
Drain lines have a constant minimum downslope of 1 in/48 in (1.2°) to funnel without touching its
sides or bottom?
Drain lines from large humidifiers empty into separate air gap funnels before connecting to the
building drain?
Air gap funnel(s) connected to a dedicated building drain (recommended) with a drainage capacity
of at least 2.3 gpm (8.7 L/min) for an EL-OC unit and 6.7 gpm (30 L/min) for a RS-OC unit – per
steam cylinder?
Drain line exiting the funnel minimum 7/8 in (22 mm) in diameter for an EL-OC unit, and minimum
1-3/4 in (45 mm) for a RS-OC unit?
If the unit is installed in a cold climate, are the water supply and drain lines trace heated and insulated?
All pipe chases sealed to isolate the unit from pressure inside the building?
Any leaks?
Supply and drain lines flushed to remove all debris? Strainer in the fill valve clear of all debris?
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