LAARS Heating Systems
Page 34
Figure 17. Wiring Access
Field Electrical Connections
at the Terminal Block on the
Control Panel.
Hinged control panel
swings open for
servicing and setup
Available Electrical
Raceway
Available Knockouts for
System Sensor and/or
modbus, etc.
Shown with outside panels
removed for full servicing.
Junction Box for Main
Power Connections
This unit is provided with an electrical
junction box in the rear panel for main
power connections. See Figure 17.
All power wires are factory installed
between this junction box and the main
high voltage box at the front of the
unit. The unit is available with multiple
voltage packages to adapt to customer
needs ranging from 120-600 volts with
single or 3 phase versions. Refer to the
rating plate and Table 17 for appropriate
voltage and current ratings.
As a common industry practice, the
manufacturer has color coded the single
and three phase wires as shown in Table
18.
On single phase models, the incoming
voltage will be protected by the
appropriate circuit breaker, sized and
installed by a qualified electrician/authorized personnel.
The 120-volt and 24-volt systems will be protected
with resettable fuses mounted in the top of the high
voltage box. The 24-volt transformer is also redundantly
protected by its integrated 4 amp resettable fuse.
On three phase models, a step down transformer (which
is protected using an appropriate din rail mounted circuit
breaker) generates 120-volt single phase to power the
7.B Main Power Connections
24-volt transformer. The 120-volt and 24-volt outputs of
either transformer are protected with resettable fuses
mounted in the top of the high voltage box. The 24-
volt transformer is also redundantly protected by its
integrated 4 amp resettable fuse.
All power connections must be run through the
back panel as shown in Figure 17.
Table 17. Electrical Data
Full Load Amperage
Minimum Circuit Ampacity
Max Over-current Protection
Size
Voltage
120
240/220
208 1Ф
120
240/220
208 1Ф
208 3Ф
480
600
FLA
6.2
3.4
3.6
18.6
10.1
12.5
7.5
3.5
4.4
MCA
7.8
4.2
4.5
23.3
12.7
15.6
9.4
4.4
5.5
MOP
20
15
15
30
25
25
15
15
15
Size
Voltage
208 3Ф
480 3Ф
600 3Ф
208 3Ф
480
600
FLA
9.5
4.4
3
9.9
3.6
4.5
MCA
12
6
4
12
5
6
MOP
20
15
15
20
15
15
1600
2000
2500/3000
3500/4000
Size
Voltage
120
240/220
208 1Ф
120
240/220
208 1Ф
208 3Ф
480
600
FLA
6.2
3.4
3.6
18.6
10.1
12.5
7.5
3.5
4.4
MCA
7.8
4.2
4.5
23.3
12.7
15.6
9.4
4.4
5.5
MOP
20
15
15
30
25
25
15
15
15
Size
Voltage
208 3Ф
480 3Ф
600 3Ф
208 3Ф
480
600
FLA
9.5
4.4
3
9.9
3.6
4.5
MCA
12
6
4
12
5
6
MOP
20
15
15
20
15
15
1600
2000
2500/3000
3500/4000
Three Phase
600 480 208
L1
P
BR
Blk
L2
V
O
Red
L3
T
Y
BL
Single Phase
120 240 208
L1
Blk
Blk
Blk
L2
Wht Red Red
Table 18.
VoltagePhaseColorIdentification
VIEW from
the
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