Special Coupling - 175 & 200 Mbh - Schwank SET - SETU Owner's Manual

9.3 SPECIAL COUPLING: 175,000 & 200,000 Btuh
NOTE: The joint of 1ST & 2ND tubes of 175,000 & 200,000 heaters experience 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
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 accomplished using a screw driver or other tool
7.
IMPORTANT: Insert
8.
Slide coupler into position – half onto each tube – covering the rivet head
9.
Tighten coupler bolts to 40 ft-lb
10.
Install reflectors
FIGURE 16 SPECIAL COUPLING:

175,000 & 200,000 Btuh - Fasten Second Tube to First Tube -
Steps 1
& 2
Steps 3 to 6
¼
" hole at the female end.
¼
" rivet into the hole to secure the tube connection
Holes in swage of 1st tube:
locate at 3 and 9 o'clock
Welded seam in lower half of tube,
facing downward
Step 7
Steps 8 & 9
19
1/4" Rivet
SET(U)-F / ITT(U)-F Manual
RD: FEB 2014
IM091221
RL: 8B