White Rodgers 11E79 User manual

CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power system at main fuse or
circuit breaker box until installation is complete.
This control is not intended for use in locations where
it may come in direct contact with water. Suitable
protection must be provided to shield the control from
exposure to water (dripping, spraying, rain, etc.).
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
Following installation or replacement, follow appliance
manufacturers’ recommended installation/service
instructions to insure proper operation.
Do not exceed specified voltage of circuits. Higher
voltage will damage control and could cause shock or
fire hazard.
CAUTION
!
Application of this type of control may cause flame
rollout on initial startup and could cause personal
injury and/or property damage.
Replace only with exact model number, including
dash number. Failure to use exact replacement control
could cause personal injury and/or property damage.
WARNING
!
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damage
the comfort control and could cause personal injury
and/or property damage.
11E79
INTEGRATED WATER
HEATER CONTROL
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
PRECAUTIONS
DESCRIPTION
FIRE, SHOCK AND EXPLOSION HAZARDS
• Shutoffmaingastoapplianceforserviceoruntil
installation is complete.
• Disconnectelectricpowerbeforeservicing.
• Donotexceedthespeciedvoltage.
• Replacethiscontrolwithonlytheexactmodelnum-
ber listed above.
• Protectthecontrolfromdirectcontactwithwater
(dripping, spraying, rain, etc.)
• Ifthecontrolhasbeenindirectcontactwithwater,
replace the control.
• Labelallwiresbeforedisconnectionwhenservic-
ing controls.Wiring errors can cause improper and
dangerous operation.
• Routeandsecurewiringawayfromame.
• Ensureproperearthgroundingofappliance.
• Ensureproperconnectionoflineneutralandline
hot wires.
• Donottakecontrolapart,therearenoserviceable
parts inside.
• Donotusecontrolifithasbeenooded.
• Neverstandonthecontroloruseasastep.
WARNING
!
PART NO. 37-7512A
1403
www.white-rodgers.com
www.emersonclimate.com
The 11E79 control is a solid-state thermostat control for
gas fired commercial water heater applications. The 11E79
supplies a relay switched output for damper or inducer
fan applications, and a “Call for Heat” signal or power to
energize a gas valve. The 11E79 receives input signals from
a temperature probe and Electrical Cutoff (ECO). It controls
temperature with an integrated temperature control knob. The
diagnostic features of the 11E79 make is easy to diagnose
system faults and issues.
Replace a 11E79-XXX control with an approved model
number as indicated on the cross reference table below:
11E79 Model Number Replacement Cross Reference Table
OEM Model Approved Replacement Temperature Range
11E79-101 11E79-901 120°F to 180°F
11E79-301 11E79-901 120°F to 180°F
11E79-400 None 120°F to 185°F

2
2B
4A
2A
4B
INSTALLATION
SPECIFICATION
REMOVING THE OLD CONTROL
1. Turn off main electrical power to the water heater.
2. Shut off the gas to the water heater.
3. Note the temperature setting of the dial.
4. Remove any cover that may be surrounding the 11E79
control.
5. Remove the wire connectors that plug into the four
locations on the control (see Fig. 1). Note that the
connectors have latches which must be depressed. DO
NOT FORCE THE CONNECTORS. DAMAGE TO THE
WIRING MAY RESULT.
6. Remove the four screws that mount the control to the
mounting plate and remove it from the water heater.
(see Fig 2).
Figure 1 - Connectors
Figure 2 - Mounting Screws
INSTALLING THE NEW CONTROL
1. Position approved new control of model number as
indicated on the cross reference table on the water
heater and secure with the four mounting screws
previously removed.
2. Replace the four wire connectors that were removed in
step 5 above.
3. Set the temperature dial to the same setting as noted in
step 3 above.
4. Restore gas and electrical power to the water heater.
ELECTRICAL RATINGS:
Input and Frequency: 120 VAC, 60 Hz
XFMR Sec. Current: 1.5A @ 24 VAC
Field Output (DD4,DD2): 1.5A @ 24 VAC
TEMPERATURE RANGE:
Setpoint Range: 120°F – 180°F or 120°F – 185°F

3
WIRING DIAGRAMS
Figure 3 - 11E79-101
Figure 4 - Typical Wiring Diagram with 50B66
4 PIN Upper Probe CONNECTOR (4A)
2 PIN Lower Probe CONNECTOR (2A)
4 PIN CONNECTOR (4B)
2 PIN CONNECTOR (2B)
1 ECO1R TOP ECO RETURN
2 UPSR UPPER PROBE SENSOR RETURN
3 ECO1O TOP ECO OUT
4 UPSO UPPER PROBE SENSOR OUT
1 TH 24VAC HOT
2 TR 24VAC RETURN
3 DD2 DAMPER DRIVE PIN 2 NOT USED
4 DD4 IGNITION (CALL FOR HEAT) PIN 4
1 L1 LINE HOT
2 L2 LINE NEUTRAL
1 LPSO LOWER PROBE SENSOR OUT
2 LPSR LOWER PROBE SENSOR RETURN
21
43
Viewed from wire side
Viewed from wire side
Viewed from wire side
Mates with AMP
Connector 1-480702-0
and pin 350547-1
Viewed from wire side
Mates with AMP
Connector 1-480698-0 and
socket 350550-1
12
21
43 21
LINE HOT
LINE NEU
120 VAC
IGN
NEU
FP IGNGND
FLAME
SENSE
PROBE
IGNITOR
GAS
VALVE
MV
COMMV PS
TR
XFMR NEU
XFMR HOT
TH
HLI HLO
W500
L3
50B66
During Standby Mode, the Damper Motor
is energized to close the damper.
S1 - Damper Open Switch
S2 - Damper Closed Switch
24 VAC
11E79
TR 4B-2
DD4
4B-4
L2
L1
TH
TOP
PROBE
BOTTOM
PROBE
4A-3
4A-4
4A-2
4A-1
2A-1
2A-2
DD2
4B-3
2B-2
2B-1
4B-1
K1
K2
Reset
3A
Fuse
7A20-1
7A20-2
DAMPER DRIVE UNIT
M
R1
R2
R3 S1 S2
2
4
3
1
Relay
Coil
Motor
3
1
2
4
1
2
3
41 2
12
3
RESET
ECO
STATUS
RESET
STATUS
POWER CALL FOR
HEAT
CAUTION:
RISKOFSCALDING
INCREASESWITH
HOTTERWATER
180
170
160
150
140
130
120
1
3
41
2
3
1
2
4
12
2
WARNING
DISCONNECT POWER
BEFORE SERVICING
-NOT FIELD REPAIRABLE-
REPLACE ONLY WITH
EXACT MODEL NUMBER.
EXPLOSION AND SERIOUS
INJURY COULD RESULT
INPUT:120 V. 60HZ.
OUTPUT: 1.5 A @ 25 V
Push Reset
OPEN ECO
ECO Status
PowerCall for Heat
Reset Status
5.030
5.0305.742
4.318
3 AMP FUSE
11E79E1
USC

WIRING DIAGRAMS
TROUBLESHOOTING
White-Rodgers is a business
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
www.white-rodgers.com
www.emersonclimate.com
LED’s to the left of the wire connectors indicate status of the control. The table below shows indications and what to check.
LINE HOT
LINE NEU
120 VAC
IGN
NEU
FP IGNGND
FLAME
SENSE
PROBE
IGNITOR
GAS
VALVE
MV
COMMV PS
TR
XFMR NEU24 VAC
XFMR HOT
TH
HLI HLO
11E79
TR4B-2
DD4
4B-4
DD2
L2
L1
TH
TOP
PROBE
BOTTOM
PROBE
4A-3
4A-4
4A-2
4A-1
2A-1
2A-2
4B-3
2B-2
2B-1
4B-1
L3 K1
K2
Reset
3A
Fuse
7A20-1
7A20-2
IND
Pressure Switch
IND HOTIND NEUTRAL
50B68-603
Figure 5 - Typical Wiring Diagram with 50B68-603
Indicators Problem Corrective Action
No Power Check 2 pin connectors (2B) at top right of device for 120 VAC
Standby Verify probe connections or set water temperature
Call for Heat Control operating properly and 24 VAC supplied to gas valve
terminals.
Push Reset Water temperature was detected above maximum limit. Push
Reset button to re-enable
Open ECO Water temperature is above maximum limit. Allow water
temperature to cool before pushing Reset button to re-enable