2-424.6
March, 2016
WIRING DIAGRAMS
Models HER, VE, PTE electric unit heaters
Two-In One Diagrams
Two wiring diagrams are furnished for each circuit configuration
in this manual. Included are a connection diagram at the left
for field installation and a circuit schematic at the right to aid in
continuity and trouble shooting.
Solid lines show pre-wiring performed at the factory; dotted
lines inform the installer of connections required to put the
heater in operation.
NOTE: As indicated in every diagram, all wiring must comply
with the National Electrical Code and all local codes. All
components must agree with their respective power source.
Wiring Diagram Selection
Diagrams are readily identified in the page location index on
the following page. This allows for the correct wiring diagram
to be selected using the model, size, and power code of the
unit heater.
Select the correct wiring diagrams as follows:
1. Determine unit heater model and size.
2. Select power code number from Table 2.3.
3. Reference unit heater model in the Page Location Index
(Table 2.4) with power code number of the corresponding
wiring diagram.
CAUTION
Turn off all power to unit before wiring. Failure to wire this unit
according to this wiring diagram may result in injury to the
installer or user. For deviations, contact factory.
Abbreviations and Symbols
To facilitate interpretation and enable simplification
the abbreviations and symbols have been selected as
recommended by ANSI (American National Standards
Institute) and NEMA (National Electrical Manufacturers
Association) standards.
XFMR or TRTransformer
VVolts
Hz
Cycle or Hertz
φPhase
LC
Limit Control
THERM or THThermostat
GGround
HTRHeater
H
Hot or High
SWSwitch
CCommon
"J" Box
Junction Box
LLow
H1, H2, etc.
Transformer Primary Terminals
O.L.C.
Overload Contact
RRelay
Rc
Relay Contact
VAVolt-Ampere
X1,X2, etc.
Transformer Secondary Terminals
L1, L2, etc.
Electric Load Terminals
T1, T2, etc.
Starter or Motor Terminals
Wire Color Coding
BKBlack
BUBlue
RRed
WWhite
YYellow
Wire Color Coding
BKBlack
BLBlue
RRed
WWhite
YYellow
X1,X2, etc.
Transformer Secondary Terminals
L1, L2, etc.
Electric Load Terminals
T1, T2, etc.
Starter or Motor Terminals
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
Table 2.1
Unit Power Requirements (AMPS) - HER Models
Power Supply
HER 30
HER 50
HER 75
HER100
HER125
HER150
HER200
HER250
208/1
14.9
24.5
36.5
49.4
-
-
-
-
240/1
12.9
21.3
31.7
42.9
-
-
-
-
208/3
8.8
14.3
21.3
29.0
36.0
42.9
56.8
70.7
240/3
7.7
12.5
18.5
25.3
31.4
37.4
49.4
61.4
480/3
3.8
6.5
9.5
13.3
16.3
19.3
25.3
31.4
Table 2.2
Unit Power Requirements (AMPS) - VE & PTE Models
Power Supply VE50
VE75
VE100
VE150
VE200
VE200
VE/PTE300
VE/PTE500
2-stage
1-stage
2-stage
1-stage
2-stage
208/1
-
-
-
-
-
-
-
-
-
-
-
-
240/1
21.4
31.9
42.3
-
-
-
-
-
-
-
-
-
208/3
14.5
21.4
28.3
42.5
-
-
-
-
-
-
-
-
240/3
12.7
18.6
24.6
37.0
49.0
-
-
-
-
-
-
480/3
6.7
9.7
12.7
19.0
25.0
31.0
19.5
37.6
25.5
49.6
31.5
Table 2.3
Power Code Selection
Power Supply (Volts/Phase)
208V/1240V/1208V/3240V/3480V/3
Power Code11
12
31
32
33
Table 2.4
Electric Unit Heater Page Location Index
Model No.
2
VE/PTE400
1-stage
Power Code
11
12
31
32
32
HER 30
3
3
5
5
8
HER 50
3
3
5
5
8
HER 75
3
3
5
5
8
HER100
4
4
5
5
8
HER125
-
-
5
5
8
HER150
-
-
6
5
8
HER200
-
-
7
7
8
HER250
-
-
7
7
8
VE 50
-
9
10
10
11
VE 75
-
9
10
10
11
VE100
-
9
10
10
11
VE150
-
-
13
13
14
VE200
-
-
-
13
14
VE250
-
-
-
-
14
VE300
-
-
-
-
12
VE400
-
-
-
-
12
VE500
-
-
-
-
12
PTE300
-
-
-
-
12
PTE400
-
-
-
-
12
PTE500
-
-
-
-
12
61.5
5H70253A1 CONTACTOR
LIMIT
CONTROL
HEATING ELEMENTS
COIL
GROUND
LUG
FAN
MOTOR
THERM
FUSED DISCONNECT
SWITCH (BY OTHERS)
208V OR 240V/60 Hz/1 Ø
POWER SUPPLY
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
208V or 240V, single-phase power supply, 3kw, 5kw, 7.5kw Horizontal Models
3
5H70253A2 REV F
4
THERM
208V or 240V, single-phase power supply, 10kw Horizontal Model
CONTACTOR
COIL
FAN
MOTOR
HEATING ELEMENTS
LIMIT
CONTROL
FUSE
FUSE
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
208V OR 240V/60 Hz/1 Ø
POWER SUPPLY
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
5H70253A4 REV E
1 15kw on 240V/3 Ø only
HEATING ELEMENTS
LIMIT
CONTROL
CONTACTOR
COIL
GROUND
LUG
FAN
MOTOR
THERM
FUSED DISCONNECT
SWITCH (BY OTHERS)
POWER SUPPLY
208V OR 240V/60Hz/3 Ø
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
208V or 240V, three-phase power supply, 3kw, 5kw, 7.5kw, 10kw, 12.5kw, 15kw Horizontal Models
5
5H70253A5
6
THERM
LIMIT
CONTROL
FUSE
COIL
FUSE
208V, three-phase power supply, 15kw Horizontal Model
HEATING ELEMENTS
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
CONTACTOR
FAN
MOTOR
208V/60Hz/3 Ø
POWER SUPPLY
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
FUSED
DISCONNECT
SWITCH
(BY OTHERS)
5H70253A6
GROUND
LUG
T2
T3
L2
L3
T2
T3
L2
L3
ANY ORIGINAL FACTORY WIRING THAT REQUIRES
REPLACEMENT MUST BE REPLACED WITH WIRING MATERIAL
HAVING A TERMPERATURE RATING OF AT LEAST 105ºF.
ALL UNITS MUST BE WIRED STRICTLY IN ACCORDANCE WITH
WIRING DIAGRAM FURNISHED WITH THE UNIT. ANY WIRING
DIFFERENT FROM THE WIRING DIAGRAM COULD RESULT IN A
HAZARD TO PERSONS AND PROPERTY. DAMAGE TO OR
FAILURE OF UNITS CAUSED BY INCORRECT WIRING IS NOT
COVERED BY STANDARD WARRANTY.
ALL COMPONENTS MUST AGREE WITH THEIR RESPECTIVE
POWER SOURCE.
IMPORTANT
FAN
MOTOR
BUS BAR
COMPONENT
TERMINAL
FIELD
INSTALLED
CONNECTED
PATH
FACTORY
INSTALLED
WIRING LEGEND
HEATING ELEMENTS
LIMIT
CONTROL
HEATING ELEMENTS
INSTALLATION OF WIRING MUST
CONFORM WITH LOCAL BUILDING
CODES OR IN THE ABSENCE OF LOCAL
CODES, OF THE ELECTRICAL CODE
ANSI/NFPA 70 - LATEST EDITION. UNIT
MUST BE ELECTRICALLY GROUNDED IN
CONFORMANCE TO THIS CODE.
IN CANADA, WIRING MUST COMPLY WITH
CSA C22.1, PART I , ELECTRICAL CODE LATEST EDITION.
T1
L1
CONTACTOR 1
T1
L1
CONTACTOR 1
CONTROL
TERMINAL
BLOCK
LINE VOLTAGE
THERMOSTAT
(MIN RATING
1
4HP @ 240V)
WARNING - HAZARDOUS VOLTAGE!
FUSE BLOCK
FUSE BLOCK
POWER
TERMINAL
BLOCK
GND
DISCONNECT POWER SUPPLY BEFORE MAKING CONNECTIONS.
L1 L2 L3
208V OR
240V/60Hz/3Ph
POWER SHOWN
FUSE
FUSE
CONTACTOR
FUSE
CONTACTOR
HEATING ELEMENTS
COIL
FUSE
FUSE
FUSE
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
LIMIT
CONTROL
FAN
MOTOR
HEATING ELEMENTS
COIL
THERM
POWER SUPPLY
208V OR 240V/60Hz/3 Ø
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
208V or 240V, three-phase power supply, 20kw, 25kw Horizontal Models
7
5H70253A7
8
THERM
FUSE
240V
480V
COIL
LIMIT
CONTROL
FAN
MOTOR
FUSE
FUSED DISCONNECT
SWITCH (BY OTHERS)
HEATING ELEMENTS
CONTACTOR
480V/60Hz/3 Ø
POWER SUPPLY
GROUND
LUG
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
480V or 600V, three-phase power supply, 3kw, 5kw thru 25kw Horizontal Models
5H70253A8
CONTACTOR
COIL
LIMIT
CONTROL
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
FAN
MOTOR
HEATING ELEMENTS
THERM
240V/60Hz/1 Ø
POWER SUPPLY
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
240V, single-phase power supply, 5kw, 7.5kw, 10kw Vertical Models
9
5H70253A9
10
THERM
208V or 240V, three-phase power supply, 5kw, 7.5kw, 10kw Vertical Models
LIMIT
CONTROL
HEATING ELEMENTS
CONTACTOR
COIL
FAN
MOTOR
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
208V OR 240V/60Hz/3 Ø
POWER SUPPLY
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
5H70253A10
THERM
FUSE
FUSE
LIMIT
CONTROL
FAN
MOTOR
HEATING ELEMENTS
CONTACTOR
COIL
240V
480V
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
480V/60Hz/3 Ø
POWER SUPPLY SHOWN
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
480V or 600V, three-phase power supply, 5kw, 7.5kw, 10kw Vertical Models
11
5H70253A11 REV H
12
t°
t°
FUSE
AUX.
SWITCH
FUSE
HI
2-STAGE
THERM
LO
FUSE
FAN
MOTOR
FUSE
STAGE #2
HEATING ELEMENTS
CONTACTOR #2
COIL
STAGE #1
HEATING ELEMENTS
FUSE
FUSE
FUSE
FUSE
LIMIT
CONTROL
GROUND
LUG
3Ø CIRCUIT BREAKER
(BY OTHERS)
CONTACTOR #1
COIL
240V
480V
L1 L2 L3
480V/60Hz/3Ø
POWER SUPPLY SHOWN
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
480V or 600V, three-phase power supply, 30kw, 40kw, and 50kw Vertical and Power Throw Models
5H70253A12
THERM
HEATING ELEMENTS
LIMIT
CONTROL
FAN
MOTOR
CONTACTOR
COIL
TIME DELAY RELAY
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
208V or 240V/60Hz/3 Ø
POWER SUPPLY SHOWN
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
208V or 240-volt, three-phase power supply, 15kw, 20kw Vertical Models
13
5H70253A13
14
TIME
DELAY
RELAY
COIL
240V
480V
480V or 600-volt, three-phase power supply, 15kw, 20kw, 25kw Vertical Models
LIMIT
CONTROL
FAN
MOTOR
FUSE
HEATING ELEMENTS
CONTACTOR
THERM
FUSE
GROUND
LUG
FUSED DISCONNECT
SWITCH (BY OTHERS)
480V/60Hz/3 Ø
POWER SUPPLY SHOWN
2-424.5 — WIRING DIAGRAMS MODELS HER, VE, PTE
THIS PAGE LEFT BLANK INTENTIONALLY
15
For SERVICE contact your local qualified installation and service contractor or appropriate utility company.
As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and
specifications without notice.
Modine Manufacturing Company • 1500 DeKoven Avenue • Racine, Wisconsin 53403-2552
Tel: 1.800.828.4328 (HEAT) • www.modine.com
© Modine Manufacturing Company 2016
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