9
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
REFER TO NAMEPLATE FOR
XFMR PRIMARY (INPUT)
AND SECONDARY
(CONTROL) VOLTAGE.
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
XFMR Color Code Tabulation
Pri. Volt. Pri. XFMR Lead Clrs.
120V Sec. Lead Clrs.
24V Sec. Lead Clrs.
H1
H2
X1
X2
X1
X2
208
BLK
RED
BLK
WHT
YEL
BLU
240
BLK
ORG
BLK
WHT
YEL
BLU
277
BLK
BRN
BLK
WHT
YEL
BLU
480
BLK
BLK/RED
BLK
WHT
YEL
BLU
575
BLK
GRY
BLK
WHT
YEL
BLU
HD3D-500TSP thru HD3DTSP-4000
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 com-
bustible materials to restrict the airflow through the
heater.
2. Heater should not be operated unattended unless
adequate controls and safety devices have been in-
stalled.
3. The ambient operating temperature limits are -20˚F
to 104˚F (-29˚C to 40˚C).
4. Thermostat
1
: Unit mounted thermostats are non-
indicating. The thermostat dial can be rotated 270˚,
with a low setting of 40˚F (4˚C) when turned fully in
the counter clockwise direction and 100˚F (38˚C)
when fully turned in the clockwise direction. The dial
is equipped with a position indicator for finer adjust-
ments. The setting of 0 represents 40˚F (4˚C) and 8
Represents 100˚F (38˚C).
5. Disconnect: To disconnect the heater, turn lever in
the clockwise direction until you hear a click.
1
It is recommended that a remote thermostat be used when ceiling height
exceeds 20 feet.