Aqua-Hot AHE-100-02S Mode d'emploi

Antifreeze Leak Troubleshooting p. 1

SECTION 2: TROUBLE SHOOTING

Inspect the following components on the Aqua-Hot

Heating System for Leaks Model #’s: 431/12, AHE-

100-00S, 01S, 02S, AHE-100-03S & AHE-100-04S, AHE-

600 & AHE-675.

1.On the Front-Side of the Aqua-Hot:

A. Fluid Level Sensor/Float Switch

i. The 431/12 and AHE-100-00S, 01S,

02S do not have a fluid level sensor/

float switch.

B. Control Thermostat

i. The 431/12 and AHE-100-00S, 01S,

02S, do not have a control thermostat in

the antifreeze solution

C. Drain Valve Assembly

D. Electric Heating Element (s).

E. Circulation Pump (s).

i. When checking the circulation pumps be

sure to inspect the plumbing for the

hoses, the tank ports, and the circulation

pump.

F. Combustion Burn Chamber leak

i. When the Combustion Burn Chamber

leaks, the antifreeze will run out the tip

of the exhaust pipe.

2.On the Top of the Aqua-Hot:

A. Radiator Cap

i. bad seal

ii. Loose

B. Expansion Tank Tubing

i. cracked

ii. Loose

C. Filler Neck

i. Bent

ii. Broken nipple

iii. Bad solder joint

D. Supply and Return interior zone heat ports.

i. tubing/hose

ii. Brass fittings

Inspect the following components on the Aqua-Hot

Heating System for Leaks Model #’s: HHE-200, HHE

-500, AHE-400, AHE-450.

1. On the Front-Side of the Aqua-Hot 400, 450/

Hydro-Hot:

A. Fluid Level Sensor/Float Switch

B. Control Thermostat

C. Drain Valve Assembly

D. Electric Heating Element

E. Circulation Pump (s) / Stir Pump.

i. When checking the circulation pumps be

sure to inspect all of the plumbing:

Hoses, the Tank Ports, and the

Circulation Pump.

F. Combustion Burn Chamber leak

i. When the Combustion Burn Chamber

leaks, the antifreeze will run out the tip

of the exhaust pipe.

Antifreeze Leak NOTE: Newer model heaters do not have a radiator cap.

They will have a brass hose barb fitting, which the expan-

sion tank tubing connects to. There is also an air release

valve on the brass fitting, that may leak.

NOTE: To find an antifreeze leak, the system must

be Hot (up to operating temperature)

Or pressurized to 15 PSI.

Antifreeze Leak Troubleshooting p. 2

2.On the Top of the Aqua-Hot 450/Hydro-Hot:

A. Radiator Cap

i. bad seal

ii. Loose

B. Expansion Tank Tubing

i. cracked

ii. Loose

C. Filler Neck

i. Bent

ii. Broken nipple

iii. Bad solder joint

D. Supply and Return interior zone heat ports.

i. tubing/hose

ii. Brass fittings

3. On the Back of the Aqua-Hot 450/Hydro-Hot:

A. Domestic Water and Coach Engine copper

plumbing.

i. The copper coils are in the antifreeze

solution and where they come through

the steal tank is a possible point of

leakage for each pipe.

B. Interior Zone Heat Return ports

i. Either the coach manufacturer’s fitting

could be leaking, or the brass fitting on

the back of the Aqua-Hot, supplied by

Aqua-Hot could be leaking. The brass

fitting may need to be removed to

inspect for cracks.

NOTE: On some of the AHE-450 models the return ports are

on the top of the heater, and do not utilize the brass fitting sup-

plied by aqua-hot.

NOTE: If no leaks are found on the Aqua-Hot, it is possible

the leak is on the interior of the motor home. It could be an

interior heat exchanger, or the plumbing for the interior heat

exchangers.

3. Antifreeze Leak - (continued)

NOTE: Newer model heaters do not have a radiator cap.

They will have a brass hose barb fitting, which the expan-

sion tank tubing connects to. There is also an air release

valve on the brass fitting, that may leak.

SECTION 2: TROUBLE SHOOTING

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