Lennox ELA Series Unit Information page 28

Second Stage Heat Call ELS / ELP
4 - ELS − W2 calls for second stage heat. K19−1 closes,
energizing one side of contactor K16 which energizes
one side of relay K32. K32−1 closes energizing
K232
24VAC
9 6
TB1
TB1
H1
H2
C2
C1
S149
A
B
TB1
C
F4
3
L1
L2
L3
F3
GROUND
1 S149 SWITCH AND K220 RELAY MAY BE
FIELD SUPPLIED OR USE AVAILABLE KIT
S50 LOCATION ON UNITS WITH TWO
2
SINGLE SPEED COMPRESSORS
3 USE COPPER CONDUCTORS ONLY
4 S50 LOCATION ON UNITS WITH ONE
DUAL SPEED COMPRESSOR
LINE VOLTAGE FIELD INSTALLED
DENOTES OPTIONAL COMPONENTS
2
7
2
S50 S50
1
K220-1
4
S50
S49
J248
1
P248
H2
B PC 1
2
STF
1
RL 3
4
RH
C 5
SD
A96
P248
2
J248
1
K220
A
K232
B
HE1 HE2
10, 15 KW
25, 35 KW
KW
10
15
25
35
K16. K16−1 closes, energizing HE3 and HE4.
30-10-2017 02:39:25 PM, 7X10
ELP − W2 heat demand energizes K9 and K19.
K9−1 and K19−1 closes energizing K15, K16 and
K32. K15−1 and K16−1 closes energizing HE3 and
HE4.
5
K43-1
7 2
A183
A
PC
K43
STF
B
RL
RH
SD
TB13
R S T G
A96
U V W G
B3
HE1 HE2
10
15
12.5
12.5
16.7 16.7
Page 28
TB1
W1 W2
S15
ELP
ELS
UNITS
UNITS
T2
S20
W1
A
K9
K15
B
C
C TB1
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
IMJURY OR DEATH. UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL CODES
DISCONNECT ALL POWER BEFORE SERVICING
KEY COMPONENT
CONTROL, INVERTER
A96
CONTROL,VFD BOARD
A183
MOTOR-BLOWER
B3
F3
FUSE-ELECTRIC HEAT
F4
FUSE-UNIT
ELEMENT-ELECTRIC HEAT 1
HE1
HE2 ELEMENT-ELECTRIC HEAT 2
J/P246 JACK, PLUG-POWER TO VFD
J/P247 JACK, PLUG-VFD TO MOTOR
J/P248 JACK, PLUG-VFD CONTROL
K9,-1 RELAY-HEAT
K15,-1 CONTACTOR-ELECTRIC HT 1
K43,-1 RELAY-ECONOMIZER BLOWER
K220,-1 RELAY-OVERFLOW
K232 RELAY-INVERTER PROTECTION
S15 SWITCH-LIMIT,PRIMARY,ELECT HT
S20 SWITCH-LIMIT,SECONDARY ELECT HT
S49 SWITCH-FREEZESTAT COMPRESSOR 1
S50 SWITCH-FREEZESTAT COMPRESSOR 2
SWITCH-OVERFLOW
S149
T2 TRANSFORMER-ELECTRIC HEAT
TB1 TERMINAL STRIP-CLASS II VOLT
TB13 TERMINAL STRIP-POWER DISTRIBUTION
HEATING - ELECTRIC
R
Y2
Y1
G
W1
W2
VFD CONTROL (G)
TB1
COMMON
REV 0
Lennox Commercial