Nortec Industries GS Series - Manual (Page 23)

·
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 #16 .
· 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.
GAS PIPING
· I
nstallation of piping must be in accordance with
local codes, and the National Fuel Gas Code
ANSI Z223.1 in the United States or
CAN/CGA-B149 Installation Codes in Canada.
· Refer to the indoor gas piping installation
guidelines for gas line sizes, pressures, leak
testing procedures, and safety instructions.
·
Gas lines are to be routed to the outside
connection on the right side near the back of the
unit. The installation of a sediment trap and a
certified manual shut-off valve are required
outside of the unit. The gas piping must not block
access to or prevent opening of the right side
service door. Refer to Figure #17 for details.
· Nortec recommends that each Gas Fired
Humidifier has it’s own regulator installed in line to
the unit. Th operating Natural Gas pressure
supplied for the GS units must be in the range of
5-9 “ of Water Column and propane version
10-14” of Water Column.
· Over pressure protection devices shall be
provided to prevent the pressure in the piping
system from exceeding that value that would
cause unsafe operation of any connected and
properly adjusted Gas utilization equipment. See
Figure #18
· If the system has a pressure that is higher than
the max working pressure of our humidifier, then
an Over pressure protection system is required. If
there is an Over pressure protection device
installed, it MUST consist of 2 devices in series.
(A pressure regulator plus one other device) Both
these devices must be able to work on their own
without damaging any downstream piping or
appliance, and the only way the downstream
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Inlet coupling supplied
Shut-off Gas Valve
(by others)
Union
(by others)
Sediment Trap
(by others)
Figure #17
Gas Piping