Lennox ELXA Series User Manual

Page 27
T3EH ELECTRIC HEAT SEQUENCE OF OPERATION (refer to gure 9) - 1 STAGE HEAT
W1 heat demand (W2 for Heat Pumps) energizes the K9 heat relay.
K9−1 closes energizing K15 contactor.
K15−1 closes energizing heating elements HE1 and HE2 assuming primary limit S15 and secondary limit S20 are closed.
NOTE – For Heat Pumps, W1 heat demand operates the heat pump in heating mode.
C
New Form No.
Supersedes
Lennox Commercial
WIRING DIAGRAM
T3EH - ELITE 072 - 150 UNITS - Y
10,15 kW
10/22
HEATING - ELECTRIC
SECTION B3 REV 1
538288-01
2022
C
DENOTES OPTIONAL COMPONENTS
COMMON
TB1
LINE VOLTAGE FIELD INSTALLED
IF ANY WIRE IN THIS APPLIANCE IS REPLACED, IT
MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING,INSULATION THICKNESS AND TERMINATION
WARNING-ELECTRIC SHOCK HAZARD, CAN CAUSE
INJURY OR DEATH. UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL CODES
DISCONNECT ALL POWER BEFORE SERVICING
B3
MOTOR-BLOWER
COMPONENT
KEY
A183
CONTROL, VFD BOARD
A96
CONTROL, INVERTER
K43-1
R
G
W1
W2
K232
K220-1
K220
S149
Y2
Y1
H1
H2
C2
C1
TB1
TB1
7
2
5
7 2
A
B
1
1
1
24VAC
S49
S50
A
B
C
C
TB1
TB1
S20
K9-1
T2
W1
TB1
W1
HEAT PUMP
UNITS
COOLING
UNITS
9
6
W2
K9
K15
S15
2
K43
A
B
C3
Y3
VFD
CONTROL (G)
S50
4
S50 LOCATION ON UNITS WITH ONE
COMPRESSOR
4
USE COPPER CONDUCTORS ONLY
S50 LOCATION ON UNITS WITH TWO
COMPRESSORS
S149 SWITCH AND K220 RELAY MAY BE
FIELD SUPPLIED OR USE AVAILABLE KIT
3
2
1
B3
J247
P247
J246
P246
TB13
GROUND
F3
HE1
F4
K15-1
3
L3
L2
L1
10
15
5
7.5
5
7.5
072, 090, 120, 150
KW
HE1 HE2
HE2
1
7
4
H2
K264-1
P248
J248
1
J248
P248
J248
P248
1
3
DL58
K43,-1
RELAY-ECONOMIZER BLOWER
J/P248
JACK, PLUG-VFD CONTROL
K220,-1
RELAY-OVERFLOW
S149
SWITCH-OVERFLOW
TB1
TERMINAL STRIP-CLASS II VOLT
S49
S50
SWITCH-FREEZESTAT COMPRESSOR 1
SWITCH-FREEZESTAT COMPRESSOR 2
ELEMENT-ELECTRIC HEAT 1
ELEMENT-ELECTRIC HEAT 2
T2
TRANSFORMER-ELECTRIC HEAT
RELAY-HEAT
FUSE-UNIT
FUSE-ELECTRIC HEAT
F3
F4
HE1
HE2
CONTACTOR-ELECTRIC HT 1
RELAY-A96 SIGNAL SWITCHING
SWITCH-LIMIT,PRIMARY,ELECT HT
SWITCH-LIMIT,SECONDARY ELECT HT
K264-1
S15
S20
K15,-1
K9,-1
TB13
TERMINAL STRIP-POWER DISTRIBUTION
J/P247
JACK, PLUG-VFD TO MOTOR
J/P246
JACK, PLUG-POWER TO VFD
K232
RELAY-INVERTER PROTECTION
DL58
DELAY, ADJUSTABLE, ON MAKE
FIGURE 9

Lennox ELXA Series Specifications

General

Brand	Lennox
Model	ELXA Series
Category	Air Handlers
Language	English