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Steffes 3120 - Electrical and Control Connections

Steffes 3120
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Circuit Breakers
LINE 2
LINE 1
LINE 2
LINE 1
CHARGE CIRCUIT #3
CHARGE CIRCUIT #2
CHARGE CIRCUIT #1
BLOWERS/CONTROLS CIRCUIT
CHARGE CIRCUIT #4
(MODEL 4130 and 4140 ONLY)
LINE 2
LINE 1
LINE 1
LINE 2
LINE 1
LINE 2
To Service (Breaker) Panel
(4100 SERIES ONLY)
SAMPLE SYSTEM IDENTIFICATION LABEL
FIGURE 9
CIRCUIT PHASING CONNECTIONS
FIGURE10
LINE VOLTAGE ELECTRICAL CONNECTIONS
In standard configuration, the Comfort Plus is wired for connec-
tion to 240V, however, the element circuits can also be con-
nected to 208V. A 208V connection derates the charging input
of the system by 25%. If a system rated specifically for 208V
or 277V is required, contact the factory. The controls circuit in
the Comfort Plus system MUST be connected to 240V/208V.
The 60 amp breakers located in the electrical compartment on
the Comfort Plus feed the core charging (element) circuits. The
15 amp breaker feeds the controls and blowers circuit. All
Comfort Plus systems are factory configured to be field con-
nected to multiple line voltage circuits. If a single feed line voltage circuit is desired, an optional single feed kit is
available from the factory.
To determine the correct wire size required for each circuit feeding the
Comfort Plus, refer to the Specifications (Page A.01) and the system's
identification label located on the lower front of a 3100 series system
and on the lower left side of a 4100 series system. (Reference Sample
Label Figure 9.)
Step 1 Remove the electrical panel cover.
Step 2 Route all line voltage wires through a knockout and into the
electrical panel of the Comfort Plus.
Step 3 Make proper field wiring connections to the Comfort Plus
breakers. Refer to the Line Voltage Wiring Diagrams (Pages
A.08 - A.11) for more information on these connections.
Installation 2.09 Comfort Plus
Installation
HAZARDOUS VOLTAGE: Risk of electric
shock. Can cause injury or death. Do not
energize the system until installation is
complete. Equipment MUST be installed
by a qualified technician in compliance
with all applicable local, state, and
national codes and regulations.
WARNING
To ensure proper operation and
safety, all line voltage circuits
must be segregated from low
voltage wiring in the Comfort Plus.
To reduce electro magnetic fields
associated with electrical circuits
and to avoid induced voltage on
sensors and electronic devices, the
circuit phases MUST be alternated
as shown in Figure 10.
IMPORTANT
The 60 AMP breakers on the Comfort Plus are for internal component protection only.
Sizing of the field wire and breaker size MUST be in compliance with all applicable local,
state, and national codes and regulations.

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