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UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
8
5.1.3 Air Flow And Temperature Rise Ranges
5.2 Suspension
Four suspension points (3/8" nuts) are located on
the top of the heater. Drop rods must be 3/8"
diameter mild steel.
When handling or supporting the heater from below,
ensure that the weight is taken at the support points.
For typical suspension, See Page 8, Figure 3.
The gas or electrical supply lines must not be used
to support the heater.
Do not locate the gas or electrical supply lines
directly over the path of the flue products from the
heater.
The heater must be installed in a location that is
readily accesible for servicing.
The heater must be installed in accordance with
clearances to combustibles as indicated on the wall
tag and in this manual.
Figure 3: Suspension Methods
Model Rate Air Flow Temperature Rise
(Btu/h) Minimum (CFM) Maximum (CFM) Minimum (°F) Maximum (°F)
UHD[X][S][R] 150 150,000 1,360 5,800 20 83
UHD[X][S][R] 175 175,000 1,400 6,850 20 95
UHD[X][S][R] 200 200,000 2,050 7,750 20 73
UHD[X][S][R] 225 225,000 2,100 8,300 20 80
UHD[X][S][R] 250 250,000 2,350 8,850 22 80
UHD[X][S][R] 300 300,000 2,700 10,200 23 86
UHD[X][S][R] 350 350,000 3,120 13,600 22 86
UHD[X][S][R] 400 385,000 3,420 14,200 22 86
WARNING
Crush Hazard
Use 3/8" threaded rod
minimum.
Failure to follow these
instructions can result in
death, injury or property
damage.
Nut
Washer
Riv
Nut
Ensure all suspension
hardware is torqued to
a minimum of 20 ft lbs.
Support Points
3/8"
Threaded
Rod
Cone Point
Set Pin
Window
Clamp
Unistrut
Unistrut
3/8"
Threaded
Rod
Washer
Nut
Channel Nut
NOTE: Duct
supports
not shown.
Duct supports
and duct are
not provided by
manufacturer.