Nortec EL SERIES, Installation, Operation And Maintenance Manual

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26
Installation
2584597_B_EN_1705 Nortec EL/RS Outdoor
5.4.4 Rooftop Curb Mounting
Refer to the installation overview in
Figure 6 on page 16
and required clearances in
"Location and Suggested
Clearances" on page 22
, then install the humidifier on the rooftop curb as follows:
1. Select a location where the unit is not exposed to severe weather, or where the temperature drops
below -40 °F (-40 °C), and where the wind speed does not exceed 100 mph (160 km/h). External
bracing (supplied by others) will be required when wind speed exceeds 100 mph (160 km/h).
IMPORTANT! The warranty does not cover damage to the humidifier or property caused by
winds in excess of 100 mph (160 km/h).
2. Choose the location of the curb on the rooftop so that the humidifier is as close as possible to the
steam distributor.
3. Construct the curb to the dimension shown in
Figure 11 on page 27
and
Table 6
. Make sure that the
curb is capable of supporting the full operating weight of the unit – refer to Table 9 on page 57 .
IMPORTANT!
Make sure that the curb is properly anchored to the rooftop.
4. Cut suitably sized openings in the roof and install pipe chases – refer to
Figure 9 on page 23
for
general locations.
5. Remove the shipping straps, the packaging crate and the foam spacers around the unit, but DO NOT
remove the screws at the bottom that secure the unit to the shipping skid.
WARNING!
Heavy object – risk of personal injury and damage to equipment!
Prevention: While the unit is still attached to the shipping skid, raise the humidifier using a
forklift or crane. Protect the unit from damage by tethers and other lifting equipment, and do not
drop the humidifier.
6. Carefully lower the unit onto the curb, then remove the shipping screws and the shipping skid from
the bottom of the unit.
7. Make sure the unit is seated properly and level on the curb, and fasten the unit securely to the curb
using suitable 1/4 in (6 mm) diameter fasteners (supplied by others) through all the pre-drilled holes
in the base of the unit.
Table 6: Curb Dimensions
Housing
Size
Dimension
in (mm)
X Y Z
Small 20.1 (511) 13.3 (338) 15 (380)
Medium 25.1 (638) 18.1 (460) 15 (380)
Large 41.1 (1044) 18.1 (460) 15 (380)