Operation - Chromalox HD3D Installation, Operation And Maintenance Instructions

3PH ELEMENT WIRING
T1 T1 T2
G
GREEN
T1 T2 T3
POWER
CONTACTOR
L1 L2 L3
FOR VOLTAGE AND PHASE
SEE HEATER NAMEPLATE
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 : Unit mounted thermostats are non-
1
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).
M
2T
6T3
T3 T3 T2
4T2
GRN/YEL
RED
ORANGE
2T1 4T1 6T3
A1
1L1 3L2 5L3
A1
MOTOR
CONTACTOR
BLACK
BLACK
BLACK
OMIT FOR 1Ø
LIGHT BLUE
1PH ELEMENT WIRING
T1 T1 T1 T2 T2 T2
IN HEATER
OFF
FAN
HEAT
ONLY
1 1
2 2
AR CUTOUT
3
3
PURPLE
NO C
YELLOW
1
6
WHITE
2
TIME DELAY
RELAY
X1 X2
SEC
REFER TO NAMEPLATE FOR
TRANSFORMER
XFMR PRIMARY (INPUT)
40VA
AND SECONDARY
(CONTROL) VOLTAGE.
PRIMARY
H1 H2
XFMR Color Code Tabulation
Pri. Volt. Pri. XFMR Lead Clrs.
H1 H2
208 BLK RED
240 BLK ORG
277 BLK BRN
480 BLK BLK/RED
575 BLK GRY
5. Disconnect: To disconnect the heater, turn lever in
the clockwise direction until you hear a click.
It is recommended that a remote thermostat be used when ceiling height
1
exceeds 20 feet.
9
BUILT IN
THERMOSTAT
CONTROL TERMINAL
BLOCK
C1 C2
BRN
BLK/WHITE
NC
PINK
120V Sec. Lead Clrs. 24V Sec. Lead Clrs.
X1 X2 X1
BLK WHT YEL
BLK WHT YEL
BLK WHT YEL
BLK WHT YEL
BLK WHT YEL
X2
BLU
BLU
BLU
BLU
BLU