Cadet CEH-003M Owner's Manual - page 5
5
H
1
H
2
P
1
P
2
F
2
F
1
Control Voltage Wiring
1. A knockout is also provided in the back of the unit for control wiring. This knockout is sized for 1/2" conduit. (see Figure 13)
2. Thermostat wire shall be as follows:
a. Line voltage control models: Use NEC Class 1, 600V, 90˚C, AWG #10 wire with copper conductor or same gauge wire as
supply line.
b. 24 volt control models: Use NEC Class 1, 600V, 90˚C, AWG #18 wire with copper conductor.
3. Install unit wall thermostats in accordance with the installation instructions supplied with the thermostat.
NOTE: Do not locate thermostat in an area exposed to unusual temperature conditions or poor air circulation.
NOTE: a. Line voltage control models of 3.3KW and 5.0KW ratings that are 208 and 240 volt, wired for 3-phase operation, should not
be used with a wall thermostat. This applies to the following models:
CEH-003-M
CEH-003-P
CEH-005-M
CEH-005-P
These models come factory wired for single phase. When these models are converted in the field to 3-phase, DO NOT USE A WALL MOUNTED
THERMOSTAT. Thermostat control for 3-phase hookup should be provided by a CEK-TB2 (built-in thermostat).
b.When using model number CEH-005-M wired single phase (factory wired) use the following thermostats:
Wall Mount – C611-25,
Built-In – CEK-TB2 (two-stage thermostat)
4. Connect the thermostat wires to terminals H1 and P1 as shown in Figure 13. On 208 and 240 volt, single-phase
models with line voltage control, install jumpers as shown in Figure 13.
Figure 13.
Thermostat wiring connections
Figure 14.
Manual reset limit
A manual reset thermal limit is
factory installed on all models.
The limit is located on the front of
the heater. The manual reset limit
will not reset until the button is
pushed. (208/240V line voltage
control heaters use two manual
reset limits)
FRONT
BACK
FRONT
Line Voltage
Control Models
(Singe Phase):
Install jumpers
between H
1
and H
2
and P
1
and P
2
on
208/240V units
(note dashed lines).
Manual Reset Limit
Heater Elements
Control Terminal Board
Connect Thermostat
Wires To P
1
and H
1
To Thermostat
Wiring Instructions
BLACK
RED
RED
BLACK
ELEMENT
1
ELEMENT
2
ELEMENT
3
ORANGE
ORANGE
RED
LIMIT
SWITCHES
FAN
MOTOR
TERMINAL BLOCK
FUSES
*HEAT RECOVERY
THERMOSTAT
FAN SWITCH
(BUILT-IN
OR REMOTE)
TWO-STAGE
THERMOSTAT
JUNCTION BLOCK
GROUND
TERMINAL BOARD
H1
H2
F2
P1
P2
F1
S1
S2
S3
L1
L2
L3
NOTE: ELEMENT 3 AT BACK OF HEATER
MAX AMPS
SUPPLY
WIRE
GAUGE
(AUG)
Cu
COND
Al
COND
#14
#12
#10
#8
#6
#4
#3
#2
#1
#0
12
16
24
32
44
56
68
76
88
100
—
12
20
24
32
44
52
60
68
80
NOTE:
DENOTES OPTIONAL EQUIPMENT
REPRESENTS 3-PHASE WIRING CONNECTIONS
(Factory wired for single phase operation)
*May not be used with built-in thermostat
Control circuit wiring must be
NEC Class 1 600 Volt Copper
Conductor and 90˚C Insulation.
NOTE: For single phase operation, leads L2 and S2
should be well insulated and left unconnected.
POWER DISCONNECT SWITCH
(Not available in Canada)
[For use with CU conductors only]
[For use with CU or AL conductors]
Use 75˚C field supply wire
WIRING DIAGRAM #1
3.3 & 5 KW, 208/240V, 1-3 Phase w/Line Voltage Control
BASIC MODELS:
CEH-003-M, CEH-003-P, CEH-005-M, CEH-005-P
NOTE: Single pole thermostat may be used
if H1 and H2 are connected with a jumper
and P1 and P2 are connected with a jumper.
FAN RELAY
Use H1 and P1 as primary
and H2-P2 as secondary
for proper heater operation.
Two stage is required for
three-phase operation.
1
3
H
H
Wiring Diagrams