• ELECTRICAL WIRING, WATER SUPPLY, AND DRAIN TUBE
MUST NOT KINK OR COME INTO CONTACT WITH SHARP
EDGES OR HOT SURFACES.
• IF REPLACING AN EXISTING FURNACE HUMIDIFIER, WE
RECOMMEND YOU REPLACE ALL COMPONENTS TO
ENSURE PROPER HUMIDIFIER OPERATION.
• THE INSTALLATION OF THIS PRODUCT MUST COMPLY
WITH NATIONAL AND LOCAL ELECTRICAL, PLUMBING,
BUILDING, AND MECHANICAL CODES.
REQUIRED TOOLS
• Safety glasses
•Workgloves
• Electric or cordless drill
• Drill bits (
3
/8",
1
/8",
7
/32”,
7
/64")
• Tin snips
• Full size Philips or Roberstons screw driver
• Short handle Philips or Roberstons screw driver
• Adjustable wrench
• Utility knife
• Pliers
• Level
• Tape
• Measuring tape or ruler
• Medium-grit sand paper
• Pencil
SELECTION OF LOCATION
TO MOUNT THE HUMIDIFIER
All bypass type furnace-mount humidifiers rely on the pressure
difference which exists between the supply duct (hot air) and the
return duct (cold air) to create an air flow through the
humidifier’s evaporator pad. The air will ALWAYS flow from hot
(high pressure) to cold (low pressure).
•INSTALLATION TIP: Before starting fully plan out the
installation.
Check for the locations of the humidifier,
bypass collar & damper, and the humidistat and
associated sensors. Plan the length and type of ducting
required, the water supply, the water drain, the electrical
wiring, and a constant 120 volt outlet to plug in the
transformer. This will ensure your installation goes as
easy and quickly as possible
1. The humidifier body and bypass tube are installed at eye level,
easily
accessible for installation and routine maintenance.
2. The space between the humidifier body and bypass tube are
no more than 30” to ensure maximum air flow through the
humidifier.
3. The supplied flex bypass tube is cut to the proper length and
pulled tight to ensure maximum air flow.
4. The humidistat is located a minimum of 6” upstream of the
humidifier, where moist air will enter the return duct.
5. The bypass damper is fully open.
6. The humidifier is mounted level on the duct.
7. There is nothing inside the duct behind the bypass collar and
damper or the humidifier body.
8. The humidifier body and the bypass collar and damper are level.
Not all installations will be as shown above – in cases where:
• The bypass duct
required is more than
the supplied 30”
• The bypass collar and
damper must be
installed above or
below the humidifier
• The bypass collar and
damper must be
installed
perpendicular to the
humidifier
Use hard metal duct and
hard metal elbows. This will
minimize the amount of air-
flow restriction.
3
Furnace Humidifier
INSTALLATION AND OPERATING INSTRUCTIONS:
Furnace Humidifier
IDEAL INSTALLATION
SUPPLY DUCT
HOT AIR
RETURN DUCT
COLD AIR
8" wide duct minimum
Bypass collar and
unit level
Bypass tube pulled
tight and cut to length
Damper fully open
No more
than 30"
Figure 1
SNAP OFF
AND SAVE
Figure 2
(14 pages)
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