Screw-In Heating Element, Thermostat & Eco / 110 Vac Trouble Shooting Wiring Schematic - Atwood Pilot 6 Gallon User Manual

SCREW-IN
Heating Element, Thermostat & ECO
Current production water heaters with the 110 VAC
heating option use a screw-in heating element, a
separate pre-set thermostat and a separate ECO.
The screw-in heating element is rated at 1400 watts
just like the bolt-on element. It is an incalloy element
and can be run for a limited amount of time in a dry
tank without shorting out.
CAUTION: If the heating element is allowed to run
with a dry tank, allow the tank to cool down for 2-3
hours before adding water. Adding water before
the tank cools sufficiently could collapse the tank.
The thermostat and ECO are pre-set surface-mounted
discs. The thermostat is set at 140° F and is the same
thermostat used on the gas side of the electronic
ignition water heaters. The ECO is a backup
thermostat and will trip if the thermostat fails and the
water temperature exceeds 170° F.
110VAC Trouble-Shooting
UP
G
Ground Lead
Common Lead
When the 110VAC portion of the water heater is not
heating water, the following diagnostic steps and
repairs should be investigated:
Turn POWER OFF to the appliance before removing
junction box cover.
Perform the following steps with POWER ON to
water heater.
1. Verify switch is in ON position.
2. Insure there is 110VAC to the unit (measure
voltage across the black and white lead to the
appliance with POWER ON). If none, trace wiring
back and make appropriate wire repair.
Perform the following steps with POWER OFF to
water heater.
3. Manual reset ECO high limit switch-A should be
depressed. Check for continuity between
TERMINAL
4. Check for continuity between
TERMINAL
thermostat.
5. If water is insufficiently hot, insure thermostat is
flush with tank.
6. Verify a good wire connection between ECO
TERMINAL
Correct if necessary.
7. Check for continuity between heating element
TERMINAL
and should be replaced. Do not over-tighten self-
tapping screws when installing new element.
8. There should
screw-G and flange of element. If there is, element
has shorted. Element should be replaced.
9. Verify ground connection.
NOTE: Heating element can be operated on an empty
tank for a limited period of time before it self destructs.
12
Wiring Schematic
F
C
Switch
Hot Lead
BLACK
( 1 )-BLACK
( 3 )-GREEN
Ground
BLACK
( 2 )-WHITE
Element
B and C of ECO.
TERMINAL
TERMINAL
E of thermostat. If there is none, replace
-C and heating element
-F and -G. If none, element is bad
TERMINAL
NOT BE CONTINUITY
D
B
E
A
Fixed Thermostat
Manual Reset
High Temperature
Limit Switch
D and
-F.
TERMINAL
between element