Technical information

OPERATION
With proper installation this heater will provide efficient and
dependable service. Please read the following guidelines to ensure
reliable operation.
1. Do not allow objects such as fabric or other combustible materials
to restrict the airflow through the heater.
2. Heater should not be operated unattended unless adequate controls
and safety devices have been installed.
3. The ambient operating temperature limits are -20˚F to 104˚F
(-29˚C to 40˚C).
FIRE HAZARD. To prevent personal injury or property damage, do not
operate heater near combustible objects, restrict airflow or use for
purposes other than described.
MAINTENANCE
Turn off power to service heater. Do not attempt to service or clean
heater while unit is operating as there is hazard of electric shock,
injury from operating fan, and burns from hot heating elements.
ELECTRIC SHOCK HAZARD. Disconnect all power before installing or
servicing heater. Failure to do so could result in personal injury or
property damage.
1. Turn off heater and allow to cool before performing these mainte-
nance procedures.
2. Fan motors in these heaters are provided with sealed ball bearings,
factory lubricated, requiring no further lubrication under normal
service conditions.
3. Vacuum or hose off heater with water (at city pressure) before acti-
vating for next heating season to remove accumulated dust or lint
which otherwise may smoke or incinerate on initial heat up.
Note: Do not use high pressure cleaning systems.
5
WARNING
!
WARNING
!
WIRING DIAGRAMS (cont’d.)
Figure 9 5kw to 39kw
Figure 10 3kw to 39kw
Typical Wiring Diagram
with accessories – Three
position switch.
OMIT FOR 1Ø
IN HEATER
CONTACTOR
C2
C1
TIME DELAY
(CONTROL)
TERMINAL BLOCK
SEC
PRIMARY
40VA
TRANSFORMER
POWER
CONTACTOR
MOTOR
X1
X2
H1 H2
RELAY
2
NC
NO
C
6
1
AR CUTOUT
BUILT IN OR REMOTE
THERMOSTAT
FOR VOLTAGE AND PHASE
SEE HEATER NAMEPLATE
1PH ELEMENT WIRING
3PH ELEMENT WIRING
PINK
BROWN
BLK BRN
YELLOW
WHITE
BLUE
BLK
BLACK
BLACK
BLACK
T1
T2
T1
T3
T2
T3
T1
L1
L2
L3
T2
T3
2T1
4T2
6T3
A2
A1
1L1
3L2
5L3
M
2T
6T
4T
T1
T1
T1
T2
T2
T2
RED
ORANGE
24V
G
IN HEATER
PURPLE
GRN/YEL
OMIT FOR 1Ø
PINK
T1
T1
T2 T3 T3
T2
T1
T1
T1
T2 T2
T2
BLK/WHITE
CONTACTOR
C2
C1
2
1
OFF
FAN
2
1
ONLY
HEAT
3
3
TIME DELAY
SEC
PRIMARY
40VA
TRANSFORMER
POWER
CONTACTOR
MOTOR
X1
X2
H1 H2
RELAY
2
NC
NO
C
6
1
AR CUTOUT
FOR VOLTAGE AND PHASE
SEE HEATER NAMEPLATE
1PH ELEMENT WIRING
3PH ELEMENT WIRING
M
4T2
6T3
GREEN
WHITE
ORANGE
RED
BLACK
BLACK
BLACK
LIGHT BLUE
BRN
BRN
YELLOW
T1
T2
T3
L1
L2
L3
BUILT IN
THERMOSTAT
CONTROL TERMINAL
BLOCK
2T1
4T1
6T3
A1
A1
1L1
3L2
5L3
2T
24V