Nortec GS Series - Manual (Page 31)

GS Series Installation | 28
Outdoor Installation
GS Outdoor units are CSA certified for outdoor installation and come complete with exhaust venting and
internal ventilation (cooling) for the electronics. Heaters for freeze protection are standard with outdoor
units. All installations must conform with local building codes or, in the absence of local codes, with the
National Fuel Gas Code ANSI Z223.1 in the United States or CSA B149.1Installation codes in Canada.
NORTEC cannot accept responsibility for installation code violations.
Mounting
NOTE: Whenever possible do not expose drain water within the outdoor cabinetry. This could result in water
damage to electronic components. If a drain pan needs to be inside the cabinetry be sure to seal around it
so the cabinet doesn’t become over humidified during the drain cycles.
Typical rooftop installations are shown in Figure 18 & 19.
The GS Outdoor unit comes standard with cutouts in the base to allow for lifting by a forklift. When lifting by
this method, ensure that the forks extend across the entire base to prevent tipping or damage to the unit.
The enclosure also comes complete with four (4) removable lifting lugs fastened to the base. All four lugs
must be utilized if moving the unit in this manner. Protect the cabinet from damage from the lifting
cables/chains during lifting. The lifting lugs should be removed from the base once the unit has been
correctly positioned on the curb mounting.
See Figure 20 for clearance details.
The integral base of the GS Outdoor model is designed to mount on a curb. The curb must be built to
structurally support the entire weight of the humidifier when in operation. Required curb dimensions are
given in Figure 21.
Ensure that the humidifier is mounted level.
The pan in the bottom of all outdoor models has a pipe chase for routing of services into the humidifier from
below.
It is not necessary to make the hole in the roof the same size as the curb. The curb drawing shows the
location and size of the pipe chase required. The pipe chase should be sealed when the installation is
complete to ensure positive or negative pressure from the building.
The panels of the outdoor model have louvers to provide ventilation for the electronics and air for the
combustion process. Locate the unit so that louvered panels are a minimum of 10 ft from any mechanical
exhaust outlet.
When mounted on the curb, the lowest air intake louvers must be a minimum of 12” above any surface
where snow or ice could accumulate. In areas where normal snow accumulation is higher, mount the unit
accordingly.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of the humidifier.
The humidifier may be installed directly on combustible flooring or, in the U.S., on wood flooring or Class A,
Class B or Class C roof covering materials.