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9.
BURNER AND TUBE INSTALLATION
PRIOR TO PROCEEDING with the tube installation:
"Suspending the System ", and this section of "IMPORTANT SPECIAL NOTES".
IMPORTANT SPECIAL NOTES: READ FIRST
1. 175 & 200,000: Special Tube Coupling - Refer to Section 9.2, Fig 16
These firing rates have an unpainted titanium alloy stainless steel first tube with a
flange (painted "white"), and an unpainted aluminized steel tube as the second tube;
all subsequent tubes are painted steel. The first tube (titanium alloy stainless steel )
will "glow red" while heater is in operation - THIS IS A NORMAL CONDITION
3. IF a 90° or 180° elbow is to be installed in the system, refer NOW to Section 8
and the Elbow Kit installation instructions supplied with the elbow kit
4. TURBULATORS: Also refer to Table page 24
155 Models (150,000 Btuh): 2 ft turbulator supplied in the Burner Kit and field installed:
155 x 40 ft heater: Insert 2 ft turbulator in end of third tube, prior to the 10 ft tur-
bulator that is factory installed in the last tube (total 12 ft turbulator)
155 x 50 ft heater: Insert in the vent end of the last tube in the system.
All other turbulators are factory installed inside tube(s) that are clearly labeled
with instruction as to where the tube(s) must be installed - Also see page 24
ALL MODELS: INSTALL THE FIRST AND SECOND TUBES (FROM BURNER END) WITH THE
WELDED SEAM (ALONG THE TUBE LENGTH) FACING DOWNWARD
1) All hangers must be:
a) Suspended at the same height = horizontal alignment of tubes
b) In a straight line = vertical alignment of tubes
c) Spaced 116" (295 cm) apart = correct spacing for reflector attachment
d) Orient hangers with the "cavity side" facing the burner end of the system (except the last
plate hanger at the vent end = the cavity side faces the vent)
2) Insert the swaged end of the first tube (tube with flange) through the 4" (10 cm) hole in the first
plate hanger (WELDED SEAM FACING DOWNWARD)
a) Ensure the 'cavity' side of the hanger faces the burner end of the system
b) Slide a Torctite tube coupler past the swage onto the tube
The final position of the coupler will be on the 'burner-end' side of the hanger
c) Guide the tube into the second hanger (webbed) – ensure the cavity side of the hanger
faces the burner end of the system
d) Position the first plate hanger 2.5 inches (6.4 cm) from the tube flange – this will provide
access to bolt the burner to the flange, and ensure correct spacing of consecutive system
hangers
e) Check that the first tube is level
3) Install a focus shield reflector over the first tube - secure with sheet metal screws to the
hanger at each end
continued ...
Read and understand Section 8 -
21
STW-JZ / IW I&O Manual
IM101229
RL: 12B- BA
RD: AUG 2013
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