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When storing the Motorhome: Not winterizing the Aqua-
Hot when freezing temperatures are present will result in
serious damage to the Aqua-Hot's Domestic Water Heating
System. Also, be sure to use an FDA approved, "GRAS"
rated antifreeze for winterization.
NOTE: The Aqua-Hot can continue to be used for interior
zone heating once the domestic water heating system
has been drained and winterized.
120 Volt-A.C. Electric Heating Element
Please note that the 120 Volt-AC Electric Heating Element is
the Aqua-Hot's secondary heat source for heating both the
interior and/or the domestic hot water during low heating de-
mand situations (such as when moderate ambient temperatures
exist and/or when there is a low demand for domestic hot wa-
ter).
If the 120 Volt-AC Electric Heating Element is not providing
enough heat, turn the Diesel-Burner on, in conjunction with the
120 Volt-AC Electric Heating Element.
© 2009 Aqua-Hot
A
D: E
PPENDIX
Figure 90
®
375D Hydronic Heating System Service Manual—Rev. A
C
XTREME
OLD
Diesel-Burner
1. If the Diesel burner Fails to operate:
A. The Fuel level in the main diesel fuel tank is
below 1/4 tank.
B. When was the last time an Annual Service
was performed?
C. Is the Diesel Fuel liquid or Jelled?
D. Are the electrodes properly adjusted?
E. Is the Diesel Fuel in the motor home winter
fuel or summer fuel?
NOTE: In extreme cold weather it may be necessary to acti-
vate the 120 Volt-A.C. Electric Heating Element for
1 - 2 hours prior to activating the burner to preheat the
burner, on the initial start up cycle only.
W
O
EATHER
PERATION
— Page 106 —
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