Steffes DLF40B - Manual (Page 19)

Installing The Furnace
(cont'd)
18
DLF30B AND DLF40B ­ 277V UNITS ONLY
FIGURE 11
Use copper or aluminum conductors rated for 75C or higher for field connection of this device. The
blowers and the controls circuit MUST be powered with 240V or 208V.
NOTE
NOTES: 1. Supply air blower speed selection terminals wiring.
2. Line voltage field wiring connections, (see Figure 8).
HEATING ELEMENTS
N.C.
240° HEAT EXCHANGER LIMIT
CHARGING SEQUENCER
STAGE 3
N.O.
N.O.
CHARGING SEQUENCER
CHARGING SEQUENCER
STAGE 2
N.O.
N.O.
STAGE 1
N.O.
N.O.
N.O.
N.O.
N.C.
LIMIT
160°
3
1
3
2
2
1
1
3
STAGING
2
BLACK
BLUE
RED
240v 24v
GROUND LUGS
(YELLOW)
2
7
7
V
A
C
YELLOW
CORE
TRANSFORMER
BLOWER
N.O.
75VA
HOUSE
BLOWER
N.O.
N.C.
COM
135° FAN
CONTROL
CONTROL
135° FAN
N.C.
LIMIT
180°
N.O.
N.O.
COM
C
IR
C
U
IT
#
1
COMMON
277 VOLT
60 60
C
IR
C
U
IT
#
1
2
4
0
V
A
C
C
IR
C
U
IT
#
2
2
7
7
V
A
C
BLACK
on temp. rise
170° DISK
Switches to low
N.C.
R1
RED
125
COM.
N.O.
(BROWN)
(BLACK)
LOW
COM.
HIGH
N.C.
E1
E2
E4
E3
E6
E5
E8
E7
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
NUMBER
ELEMENT
E9
N.C.
10uf
Cap.
B
L
U
E
/R
ED
H
E
A
TI
N
G
SP
EE
D
CORE BLOWER
SEE
NOTE 1
SUPPLY AIR BLOWER
MED. LOW
MED. HIGH BLUE
BLACK
YELLOW
RED
LOW
COM.
HIGH
60
2
7
7
V
A
C
C
IR
C
U
IT
#
3
Cap.
5uf
B
LU
E
/B
L
A
C
K
C
O
O
LI
N
G
S
P
EED
C
O
N
TR
O
LS
B
LO
W
ER
S
/
C
H
A
R
G
E
C
H
A
R
G
E
C
H
A
R
G
E SEE NOTE 2