Mars ECD3KW Series User manual

1
INSTALLATION MANUAL
Electric Heat Kit
Model
ECD3, 5, 8, 10, 15, 20, 25KW Series

2

3

4

5





N

T





D

KW


D

KW


D

KW


D

KW


D

KW


D

KW


D

KW




      
   

 !  
 !  ◄  
 ◄  
I  I  I  I I I I I I I I I I I I I  I  I  I I I I I I I I I I I I
I  I  I  I I I I I I I I I I I I
I  I  I  I I I I I I I I I I I I I  I  I  I  I  I  I I I I I I I  I  I  I  I  I  I I I I I I
I  I  I  I  I  I  I  I  I 







N

T





D

KW


D

KW


D

KW


D

KW


D

KW


D

KW


D

KW




      
   

 !  
 !  ◄  
 ◄  
I  I  I  I I I I I I I I I I I I I  I  I  I I I I I I I I I I I I
I  I  I  I I I I I I I I I I I I
I  I  I  I I I I I I I I I I I I I  I  I  I  I  I  I I I I I I I  I  I  I  I  I  I I I I I I
I  I  I  I  I  I  I  I  I 



6

7
Electric auxiliary heating wiring diagram
: thermal cut-out
: thermal link, self-resetting
25KW HEAT KIT
Round hole number Relay number
RELAY 1
RELAY 2
Relay number
RELAY 1
RELAY 2
CB3
Round hole number
RELAY 3
CB2
RELAY 4
RELAY 5
CB1
3(S) 1(L1)
2(L2)
TYPE A
L1 L2
TYPE B
Y/G
Circuit breaker number
NOTE2:
Please attach the nameplate to the cover of
the electric control box. All the round holes
located on the plate represent numbers. Please
refer to the Installation Manual for details.
NOTE1
:
This symbol indicates the element is
optional, The wiring type of the actual
unit shall prevail.
NOTE3: TO BE WIRED IN ACCORDANCE
WITH NEC AND LOCAL CODES.
NOTE4: POWER A,B,C,D ARE DIFFERENT
POWERS.
Y/G
3(S)
RED
1(L1)
2(L2)
YELLOW
BLACK
3
RED
BLACK
BLACK
BLACK
BLACK
RELAY5
0
4
0
4
BLACK
BLACK
BLACK
RED
RED
RED
RED
RED
RED
BLACK
BLUE
RED
RELAY3
RELAY4
RELAY2
RELAY1
Aux-Heat
control signal
0
124
0
124
0
124
0
124
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
0
124
0
124
0
124
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
124
68
0
2
4
8
0
2
4
8
0
2
4
8
0
2
4
8
0
14
0
14
0
14
0
14
0
14
0
14
0
1
0
1
0
2
4
8
0
2
4
8
0
2
4
8
0
2
4
8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2
4
8
0
2
4
8
0
2
4
8
0
2
4
8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
2
4
8
0
2
4
8
0
2
4
8
0
4
8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
24V～
TO INDOOR UNIT
MAINBOARD
CN12 TO INDOOR UNIT
MAINBOARD
CN11
BLACK
BLACK
RED
RED
RED
BLACK
8888888888888888
6666666666666666
222222222222222
BLACK
BLACK
1111111111111111111111111111111
1111111111111111111111111111111
6666666666666666 8888888888888888
22222222
8888888888888888 6666666666666666
6666666666666666
L1 L2
CB1
L2
L1
CB CB
L1 L2
CB2
L2
L1
CB CB
L1 L2
CB3
L2
L1
CB CB
RED
BLACK
HTR5
TCO5
TL5
RED
BLACK
HTR4
TCO4
TL4
RED
BLACK
HTR3
TCO3
TL3
HTR1
TCO1
TL1
HTR2
TCO2
TL2
POWER A POWER B POWER C POWER D
Y/G
(green)
Y/G Y/G Y/G
The wiring mode of power supply A shall be based on the type of original
wiring terminal of AHU; for type A, S position must be connected to the
ourdoor S; for type B, S position shall not be connected.
 Page 27
Indoor Unit Installation

8
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