Schwank SPW2-JZ Series Installation & Owner's Manual page 26

9.1 SPECIAL COUPLING: 175,000 & 200,000 Btuh
: The joint of 1ST & 2ND tubes of 175,000 & 200,000 heaters experience
NOTE
strong forces of expansion. Follow instructions below for special coupling of the
tubes.
SPECIAL COUPLER INSTALLATION
1. Note the 2 holes opposite each other at
the swaged end of the first tube (flanged)
2. Install the first tube with 2 holes (swaged
end) at the 3 and 9 o'clock position, with
the welded seam located in the lower
half of tube, facing downward
3. Slide the loosened tube coupler on to the
first tube, past the swage
4. The second tube has a ¼" hole at the fe-
male end.
5. Slide second tube over swaged end of
first tube to align the hole in the second
tube with one of the holes in the first tube
6. Final alignment of the holes can be ac-
complished using a screw driver or other
tool
7. IMPORTANT: Insert ¼" rivet into the hole
to secure the tube connection
8. Slide coupler into position – half onto
each tube – covering the rivet head
9. Tighten coupler bolts to 40 ft-lb
10. Install reflectors
SPW2, STW2(S) / IWP2, IW2(S) I&O Manual
IM170629
RL: 03C
RD: APR 2019
FIGURE 15 SPECIAL COUPLING:
175,000 & 200,000 Btuh
•
- Fasten Second Tube to First Tube -
Steps 3
to 6
Step 7
Step 8
26
Holes in swage of 1st
tube: locate at 3 and 9
o'clock
Welded seam in
lower half of tube,
facing downward
1/4" Rivet