Aqua-Hot 375-d Service Manual page 111

2. Remove The Flame Tube.
A. Loosen and Remove the four 5/16 - 24 nuts securing
the Flame Tube in place.
B. Remove the Fame Tube Spacer.
C. Remove the Flame Tube.
D. Clean and inspect the Flame Tube.
E. Clean and inspect the Heat Transfer Tabs welded
inside the Aqua-hot, using a long handled wire brush.
F. Clean and inspect the Flame Tube Spacer.
Flame Tube Flame Tube
Spacer Gasket
A
PPENDIX
Flame Tube
®
© 2009 Aqua-Hot 375D Hydronic Heating System Service Manual—Rev. A
E: A M
NNUAL AINTENANCE
Figure 96
P
ROCEDURE
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