Additional Requirements When Venting Through A Sidewall; Electrical; Primary Wiring; Low Voltage Control Wiring (See External Wiring Diagrams In This Manual) - Nortec GH Series Instaliation, User & Maintenance Manual

WARNING: Provide a screen or barrier to prevent
personal injury in areas where inadvertent personnel
contact with vent pipe can occur.
The GH may be vented through the back or
through the top of the unit depending upon the model.
Choose a venting method based on desired location of
the outside vent terminal and knock out the hole in the
desired panel of the humidifier.
For sidewall venting, locate the humidifier as close
as possible to the wall being used. For GH 100, the
minimum vent length is directly through the back of the
humidifier, through the wall, and connected to the
outside vent terminal.
The maximum recommended vent length is 100
equivalent feet where each 90° elbow equals 10' and
each 45° elbow equals 5'.
NORTEC recommends 100' vent length maximum
to ensure that output is maintained. For lengths over
100', unit should be assumed to lose 10% output for
each additional 50' equivalent length.
All horizontal runs of the vent pipe shall have a
minimum rise of 1/4" per foot (21 mm/m) and shall be
supported at maximum intervals of 5' (1.5 m) and at
each point where an elbow is used.
Periodic cleaning of the screens in the vent
terminal is required for proper operation of the
humidifier.
ADDITIONAL REQUIREMENTS WHEN VENTING
THROUGH A SIDEWALL
The vent terminal must be installed within the
same atmospheric pressure zone as the combustion
air inlet of the humidifier.
Locate the vent terminal at least three feet above
any forced air inlet located within ten feet; or at least
four feet below, four feet horizontally from, or one foot
above any door, window, or gravity air inlet into any
building.
A minimum horizontal clearance of four feet from
electric meters, gas meters, regulator and relief
equipment is required.
Locate the vent terminal at least seven feet above
grade when it is adjacent to public walkways.
Locate the bottom of the vent terminal at least
twelve inches above grade or ground, or normally
expected snow accumUlation level. The snow level
may be higher on walls exposed to prevailing winds.
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Avoid areas where local experience indicates that
condensatedrippage may cause problems such as
above planters, patios, or over public walkways, or
over an area where condensate or vapor could create
a nuisance or hazard, or could be detrimental to the
operation of regulators, relief valves, or other
equipment.
Refer to the vent manufacturer's installation
instructions.
ELECTRICAL
PRIMARY WIRING
1 .. Humidifiers require field wiring to primary
voltage terminal blocks. Power requirement is
120 V, 15A fused circuit, single phase. Wiring
is fed through a 7/8" hole on upper right hand
side of control compartment.
2. When installed, the appliance must be
electrically grounded in accordance with local
codes or, in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70,
and/or the CSA C22.1 Electrical Code, if an
external electrical source is utilized.
3. Connect ground wire to cabinet ground clamp.
4. External wiring sizes must be in accordance
with NEC and/or CEC and existing local
. electrical codes and by-laws.
LOW VOLTAGE CONTROL WIRING (See external
wiring diagrams in this manual.)
On/Off Controls (8 Models)
Controls are available from NORTEC as
accessories. If controls were not ordered with
humidifier, they must be supplied by others. The
following information is relevant to all controls, factory
supplied or otherwise.
A, 8 and C (described below) are to be wired in
series (only one path for current) across terminals 1
and 2 on the low voltage control terminal strip, or
replaced with a jumper wire for constant operation.
Caution: Terminal 1 is the "hot" wire from the 24V
control transformer; it will blow the 3A breaker on
tranformer if any control field wiring touches ground
metal.
A - Wall or Duct Mounted Control On/Off
Humidistat: Wired to make on drop in humidity, break
on rise to setpoint. Set to desired RH. Can be a
make/break set of contacts from a Building Automation
System.