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Fluid Expansion Bottle
Burner Connections
Burner Connections
Please reference the instructions below and the image in Figure 42.
•
The circulation pump inlet should be below the coolant outlet port to eliminate air in the line when installing.
•
Verify the inlet and outlet ports on the burner prior to installing hoses. The correct direction of the coolant flow must be
determined.
•
Secure hose connections using hose clamps, tightened with a torque of 40 lb-in (4.5 Nm).
BURNER COOLANT SYSTEM DIAGRAM
p. 20
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Gas
Circulation
Pump
Burner
Figure 42
Plumbing Requirements
The plumbing lines are how the fluid is transferred from the
Aqua-Hot to the burner and back to the Aqua-Hot to transport
heat to domestic water and to the interior of the RV.
Properly installing the coolant hoses to the Aqua-Hot from the
burner are integral to the correct and safe operation of the
heating system.
Reference the requirements below to ensure the plumbing lines
are properly installed.
•
Hoses used in this installation must comply with SAE 20 R3
specifications.
•
The plumbing hoses should avoid any bends or dips as
these can cause excess air in the lines, not allowing the
flow of coolant to properly flow.
•
The hose clamps must be tightened with a torque of 40
lb-in (4.5 Nm).
•
Reference the plumbing diagram below for an example of
how the burner should be plumbed with the 125GN.
NOTE: This diagram below is simply a reference to show
the layout and flow of the plumbing to and from the
heaters. Placement may vary depending on the RV.
Gas Burner
Aqua-Hot 125GN
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Plumbing Requirements
Fluid Expansion Bottle
Hose Clamps
Gas Burner
Supply Port
Gas Burner
Burner Supply
Burner Return
Expansion Bottle
Figure 45
Circulation
Pump
Figure 43
Figure 44
p. 21
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