Rheem EON User manual

EON Field Replacement Kit
EON Control for Replacing ECM 2.3 or EON motor Control
This control cannot be used on ECM2.0 motors. For ECM2.0
motors replace entire motor with specified Eon Motor/module
assembly.
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
ENERAL WARNIN S
Installing and servicing of heating and air conditioning
equipment can be hazardous due to gas, system pressures, and
electrical components. Only trained personnel should install or
service heating and air conditioning equipment. The qualified
installer or agency must use factory authorized kits or
accessories when modifying this product. Refer to individual
instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warning or cautions attached to the
unit. Consult local building codes and National Electrical Code
(NEC) for special requirements. Recognize safety information.
This is the safety-alert symbol When you see this symbol
on the unit and in the instructions or manuals, be alert to the
potential for personal injury.
WARNING ELECTRICAL SHOCK AND
NATURAL GAS EX OSURE
Before installing or servicing unit, always turn off all gas and
electrical supplies to unit. There may be more than one
disconnect switch. Turn off accessory heater power if
applicable. Electrical shock can cause personal injury or death.
WARNING RO ER TOOLS AND
SKILLS
The ability to properly perform service on this equipment
requires certain expertise, mechanical skills, tools, and
equipment. If you do not possess these, do not attempt to
perform any service on this equipment other than those
procedures recommended in the User’s Manual. A failure to
follow this warning could result in possible damage to this
equipment, serious personal injury, or death.
WARNING ELECTRICAL SHOCK
Wait at least 5 minutes after disconnecting line voltage from
equipment before opening motor to prevent electric shock which
can cause personal injury or death.
CAUTION FAILURE MAY RESULT
Installing connectors incorrectly may result in immediate failure
of control module.
Included: EON Control
Two 2.45-inch Bolts
Two 2.76-inch Bolts
Adapter Ring
Instructions:
Before you begin, verify control is non-functional using unit
troubleshooting instructions. See below for instructions.
1. Disconnect main power. Detach 5-pin power cable and
16- pin signal cable from the existing control.
2. Determine motor type by comparison to Figures 1a and 1b.
Figure 1a: Figure 1b:
EON connector ECM 2.3 connector
3. Wait at least 5 minutes to remove the
installed control. Unscrew and remove 2 bolts from the end
of the installed control attaching it to the motor. Separate the

EON Field Replacement Kit
EON Control for Replacing ECM 2.3 or EON motor Control
control and motor enough to reach inside and detach the 3-
pin connector between the motor and control by pushing on
tab (see Figure 2a and 2b).
Figure 2a: Figure 2b:
3 motor leads to EON control 3 motor leads to 2.3 control
4. Validate motor is not defective see Figure 3: first measure
resistance between each of the 3 motor leads to the
unpainted part of the endshield – all should be infinite (at
least 100K) ohms. Then measure resistance between each of
the 3 leads – resistance across any 2 leads should be less
than 20 ohms and each lead to lead resistance should be the
same within +/- 10%. If motor fails either test, replace entire
motor. If motor passes both tests, continue.
ECM 2.3
EON
Figure 3: Testing motor leads with ohmmeter
Replacing an ECM 2.3 control:
5. For ECM 2.3 (Figure 1b) refer to steps 6 through 12,
“Replacing an ECM 2.3 control.”
For EON (Figure 1a) refer to steps 13 through 19,
“Replacing an EON control.”
6. Two sets of bolts are included in the kit. When replacing
the ECM 2.3, use the 2.76-inch bolts (longer set). The
shorter bolts are not used.
7. Place adapter ring on top of new EON control, aligning the
adapter ring notch with the tab on the control connector (see
Figure 4). Do not use the notch close to weld seam on
adapter ring as this may cause interference with control
connector flange.
Adapter ring
Figure 4: Adapter ring on control
8. Attach the 3-pin connector from motor to corresponding
connector on the new EON control (see Figure 2a).
9. Place control with adapter ring onto the existing motor.
Assure that the notch in the adapter ring lines up with the
tab on the motor endshield (see Figure 5).
Figure 5: Adapter notch lined up with motor tab

EON Field Replacement Kit
EON Control for Replacing ECM 2.3 or EON motor Control
10. Place the two 2.76-inch bolts into the holes at the base of
the new EON control and tighten down to a torque
measurement of 15-19 inch pounds.
11. Reattach the 5-pin power cable and 16-pin signal cable into
the unit connector. Installing connectors
incorrectly may result in failure of control module. Rotate
the motor assembly to insure plug is in correct location to
match original location.
12. Discard the shorter set of bolts.
Replacing an EON control:
13. Two sets of bolts are included in the kit. When
replacing the EON, use the 2.45-inch bolts (shorter set). The
longer bolts and adapter ring are not used
14. Attach the 3-pin connector from motor to corresponding
connector on the new EON control (see Figure 2a).
15. Align motor endshield to top of new EON control. Align
notch in motor endshield with tab on connector (see Figure
6).
Figure 6: Motor endshield on control
16. Place control onto the existing motor. (see Figure 7).
Figure 7: Motor and control mated
17. Place two 2.45-inch bolts into the holes at the base of the
new EON control and tighten down to a torque
measurement of 15-19 inch pounds.
18. Reattach the 5-pin power cable and 16-pin signal cable into
the unit connector. Installing connectors
incorrectly may result in failure of control module.
19. Discard the longest set of bolts and adapter ring.