Water Connection Requirements; Water Connections Checklist - Nortec EL005 Installation Manual

5.6.2

Water Connection Requirements

Water and drain connections must meet the following requirements:
– All water supply and drain connections are to be installed to local plumbing codes.
– For ease of maintenance, a water shutoff valve and union fitting must be installed in the supply line
before the humidifier.
– The water supply piping should have a minimum diameter of 1/2 in (13 mm), with a 1/2 in NPT female
end. The piping material should be made of copper, stainless steel or plastic certified for drinking
water systems.
The threads on the fill valve are made of plastic.
Prevention: Hand-tighten the NPT adaptor to the fill valve.
– The (optional but recommended) water filter must be installed as close as possible to the humidifier.
– The air gap funnel should have a minimum diameter of 2-1/2 in (64 mm).
– The air gap and optional trap should be located away from the control cabinet to keep any rising
steam from damaging the electrical components in the cabinet.
– The drain piping should have a minimum internal diameter of 7/8 in (22 mm).
– The flexible bent hose exiting the humidifier should be connected to a drain line with a minimum
internal diameter of 7/8 in (22 mm) and secured with clamps.
– The drain line should be as short as possible, and have a constant minimum downslope of 1 in/48 in
(1.2°) to the funnel without touching its sides or bottom. Use stainless steel or copper pipe to handle
temperatures up to 212°F (100°C).
– Drain lines from large humidifiers with dual steam cylinders must empty into separate open air gap
funnels before connecting to the drain. Combined drain line minimum 1.5 in (38 mm) ID.
– Upon completion of installation, flush the water supply and drain lines to clear out any debris in the
lines. Check the strainer in the fill valve to ensure it is clear of all debris.
5.6.3

Water Connections Checklist

Check the following to ensure that the water connections for the humidifier have been installed correctly:
… Shutoff valve and union fitting installed in supply line?
… Water supply piping minimum 1/2 in (13 mm) diameter, and made of copper, stainless steel or plastic
certified for drinking water systems?
… Optional 5 μm water filter installed in the supply line close to the humidifier?
… Water supply temperature 34-104°F (1-40°C)?
… Water supply surge-free and pressure regulated to 30-80 psig (207-550 kPa)?
… Leak-free water supply line?
… Air gap funnel has a minimum diameter of 2-1/2 in (64 mm)?
… Air gap funnel and any other drain located away from the control cabinet in the humidifier?
… Drain lines have a minimum internal diameter of 7/8 in (22 mm)?
… Drain line 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 with dual steam cylinders empty into separate open air gap funnels
before connecting to the drain? Combined drain line minimum 1.5 in (38 mm) ID?
… All debris flushed from supply and drain lines?
Installation
38
CAUTION!
Risk of damage to the plastic threads!
2582302_C_EN_1611 Nortec EL