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
T
o
Ser
v
ice
(B
re
ak
er
) Panel
(4100 SERIES ONLY)
CIRCUIT PHASING CONNECTIONS
FIGURE12
Installation
Comfort Plus
Installation
n
3.09
The 60 AMP breakers on the Comfort Plus are for internal component protection only.
Sizing of the field wire and overcurrent protection MUST be in compliance with all appli-
cable local, state, and national codes and regulations.
w
To ensure proper operation and safety, all line
voltage circuits must be segregated from low
voltage wiring in the Comfort Plus.
w
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 12.
IMPORTANT
PEAK CONTROL CONNECTIONS
Steffes ETS heating equipment may be controlled by the Power Company
via a peak control signal. This signal
can be sent to the equipment using a
Steffes Power Line Carrier control
system, low voltage wiring, a Steffes
Time Clock Module, or line voltage
wiring. In applications utilizing
automatic charge control, outdoor
temperature information is required
and can be received via an outdoor
sensor or power line carrier control system.
The Comfort Plus heating system is factory configured
for low voltage wire control and is set to charge when
the utility peak control switch closes. Refer to the
Configuration Menu (Pages 3.13-3.14) for information
on configuring the system for the application.
Never install any wiring in
a line voltage compartment
of the Comfort Plus unless
it is rated for line voltage.
IMPORTANT
Terminal Block Coding
RP = Peak Control Input Common
P = Peak Control Input
AP = Anticipated Peak (Pre-Peak) Control Input
COM = Peak Control Output Common
NC = Peak Control Output (Normally Closed)
NO = Peak Control Output (Normally Open)
LOW VOLTAGE (DIRECT WIRED) PEAK CONTROL
If using the low voltage peak control option, the Comfort Plus is direct wired to the power company's peak control
switch. Field connections from the peak control switch are made to the low voltage terminal block through a low
voltage knockout located on the left side of electrical panel.
Step 1
Route a low voltage circuit from the power companys load control or peak signaling device to the termi-
nal block inside the electrical compartment of the Comfort Plus.
Step 2
Connect the field wiring to positions "RP" and "P" on the terminal block as shown in Figure 13.
To control other devices, refer to the Auxiliary Load Control on Page 3.12.
PEAK CONTROL
TERMINAL CONNECTIONS
FIGURE 13
M o d e l
C o n tr o l C r c t C h r g C r c t # 1 C h r g C r c t # 2 C h r g C r c t # 3 C h r g C r c t # 4
3 1 2 0 - 1 4 .0 k W
6 .0 0
2 9 .1 7
2 9 .1 7
N /A
N /A
3 1 2 0 - 1 7 .0 k W
6 .0 0
3 6 .4 6
3 6 .4 6
N /A
N /A
3 1 2 0 - 2 1 .6 k W
6 .0 0
4 5 .0 0
4 5 .0 0
N /A
N /A
4 1 2 0 - 1 4 .0 k W
7 .0 0
2 1 .8 8
2 1 .8 8
1 4 .5 8
N /A
4 1 2 0 - 1 9 .2 k W
7 .0 0
3 0 .0 0
3 0 .0 0
2 0 .0 0
N /A
4 1 2 0 - 2 4 .8 k W
7 .0 0
3 8 .7 5
3 8 .7 5
2 5 .8 3
N /A
4 1 3 0 - 2 8 .8 k W
7 .0 0
3 0 .0 0
3 0 .0 0
3 0 .0 0
3 0 .0 0
4 1 3 0 - 3 7 .2 k W
7 .0 0
3 8 .7 5
3 8 .7 5
3 8 .7 5
3 8 .7 5
4 1 4 0 - 3 8 .4 k W
7 .0 0
4 0 .0 0
4 0 .0 0
4 0 .0 0
4 0 .0 0
4 1 4 0 - 4 5 .6 k W
7 .0 0
4 7 .5 0
4 7 .5 0
4 7 .5 0
4 7 .5 0
F u l l L o a d C u rre n t
( 2 4 0 V A C o n ly - Cir c u it d e r a tio n n o t in c lu d e d )
