20
UHE
-
F / EIH
-
F I&O Manual
IM100205
RD: APR 2019
RL: 02C
FIGURE 12 SPECIAL COUPLING: 160,000 Btuh
-
Connect 2nd Tube to 1st Tube
-
Steps 3 to 6
Step 7
Steps 8 & 9
1/4”
Rivet
Welded seam in lower half of tube,
facing downward
Holes in swage of 1st tube:
locate at 3 and 9 o
’
clock
Steps 1
& 2
9.1 SPECIAL COUPLING: 160,000 Btuh Model
NOTE: The joint of 1ST & 2ND tubes of 160,000 Btuh heaters experiences strong forc-
es of expansion. Follow instructions below for special coupling of the tubes.
•
160,000 Btuh MUST USE 20 FT PRIMARY TUBE KIT TK
-
P160
-
UL
•
DO NOT USE THE PRIMARY TUBE KIT DESIGNED FOR LESSER INPUTS
•
Follow instructions below for Special Coupling of the 1st & 2nd tubes.
TOOLS REQUIRED
Screw driver or similar tool with a shaft to aid in alignment of rivet holes in 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 female 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 accomplished 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
-
return to installation instructions Section 9