6
2. NOTE: Hooks, jacks, slings, or chains must not be applied to the duct furnace casing or
to any of its components. Every duct furnace is supplied with lifting lugs unless
otherwise specified, use ALL lifting lugs on each duct furnace section. The lifting points
must be at the center of gravity to assure that the duct furnace is level during hoisting
and prior to setting.
Lifting lugs are not to be used for permanently suspending the
furnace.
3. The duct furnace is to be leveled with the hanging load distributed equally to all lugs.
DO NOT hang or support the duct furnace from the service platform (if supplied.)
4. When hoisting indoor duct furnace to be suspended, it is recommended that a separate
chainfall be used at each lifting point. The chainfalls should only be removed after the
duct furnace supports are permanently installed.
5. Use spreader bars to provide vertical lifting force only at the lifting points, and to prevent
damage to the duct furnace. Provide additional blocking and coverings as required to
prevent damage to the duct furnace finish and/or components. Assure that all crating
and packaging used for shipment that may interfere with the placing or assembling of
the duct furnace is removed before lifting the duct furnace into place.
6. If a fork lift truck is used, caution must be taken to ensure that the forks do not damage
the duct furnace or its components. The forks must extend beyond the opposite side of
the duct furnace to prevent damage.
7. Check that there are, or will be, no explosive, flammable or toxic vapors, or abnormally
excessive dust in the area where the duct furnace is located.
8. Check that the duct furnace is securely mounted and braced and will not be subject to
swaying or movement that would put a stress on fuel or electrical connections.
9. Mount and install all accessory items that may have been shipped separately for field
installations; i.e., filter boxes, filter, inlet cowls, louvers, discharge heads, plenums,
dampers, etc.
2.3 Installation Clearances
For Safety and Service, the following minimum clearances and guidelines shall be
observed:
Model Location
Top
Front
Back
Side
Type of Floor
IFD
10" 10" 10" 20"
Combustible
or
non-combustible
1. There should be a minimum 36" clearance from the front of the duct furnace flue outlet
on outdoor duct furnace.
2. The National Electrical Code (NEC or CEC) requires a minimum of 36" service space
between the face of any electrical enclosure and any wall or obstruction.
3. Provide sufficient clearance to open doors, install piping and ducting, flame observation
port, high limit switch, control panel, main fan motor, and all access panels.