Page 31
Two Stage Unitary Range
DU/DUH-LT210_10152019al
INSTALLATION CHECKLIST
After all actions on the checklist are checked / completed - proceed with start up.
F
Did you install the first hanger no more than 8 inches from the burner and
tighten with the J-bolt? (J-bolt only required for the first hanger).
F
Is the weld seam facing down?
F
Is the tube system leveled?
F
Did you mount the tube couplings with the band clamp lock bolts
oriented at the 10 o'clock or 2 o'clock position?
F
Did you robustly tighten the band clamps on the tube couplings? Recommended method is to
alternate back and forth between two band clamps to ensure even torque on tube couplings.
F
Did you alternately overlap reflectors up and down as shown
in the manual? Minimum overlap is 4 inches.
F
Did you tighten up all "S" hooks or Quick links?
F
Did you install all of the reflector support brackets supplied as shown in the
manual? E.g. One at each overlap, and one in the middle of each reflector.
F
Did you place the turbulator/flue baffle in the flue end of the heater as mentioned in
the manual? Keep baffle tube 6 o'clock and bend as mentioned in the manual.
F
Did you install end caps?
F
Did you observe clearance to combustibles for this model according
to the manual? This can also be found on the burner box.
F
Is venting in accordance with the National Fuel Gas Code, ANSI Z223.1 (NFPA
54) in the US and CSA B149.1 and B149.2 Installation Codes in Canada?
F
Did you install flex duct according to the installation manual if outside combustion air is used?
F
Did you install the gas flex connector as shown in the manual? The legally required method
– is to ensure it is arranged as shown to allow for proper expansion and contraction.
F
Did you check gas pressure at inlet of gas valve? Your heater will not perform
properly if the pressure is not correct. Please check manual for reference
Note: Complete checklist before lighting the heater. Correct any conditions that do not meet these
instructions.
Summary of Contents for DU-100
Page 2: ......
