Wiring typical wiring diagrams, Diagram 1, 3 phase voltage – Chromalox CHPES-6A User Manual
Page 4: Boilers under 40 amps total (not fused)
Diagram 1
3 Phase Voltage
3 Phase Voltage
3 Phase Voltage
Boiler
208
240
480
Boiler
208
240
480
Boiler
208
240
480
WIRING
TYPICAL WIRING DIAGRAMS
WARNING: Hazard of Shock. Disconnect all power
before working on boiler. Boilers must be effectively
grounded in accordance with the National Electrical
Code to eliminate shock hazard.
WARNING: Use 90˚copper conductors only.
1. Select proper wire gauge and type for supply conductors in accor-
dance with the National Electrical Code and local wiring codes fol-
lowing wiring diagram supplied (See recommendations for dis-
connect switches and fusing).
2. The unit is completely wired and pre-tested before shipment. No
internal wiring is required. Check all electrical connections for
tightness and retighten if necessary before energizing.
If a separate control circuit is used, the control circuit should be
connected to the control terminal block, inside access door (not
required with transformer).
3. Safety Switches — WARNING: Purchaser should use a
safety switch employing circuit breakers or fuses
between his main power source and the boiler.
4. Because of their water lines, boilers are susceptible to lightning
damage. Industrial type lightning protectors should be installed per
manufacturer’s recommendations at your service entrance. Check
your contractor or electrical dealer for recommended type for your
system.
5. Be sure all electrical connections are sufficiently tightened.
6. WARNING: Substitution of components or modifica-
tion of wiring system voids the warranty and may
lead to dangerous operating conditions.
7. SPECIAL INSTRUCTIONS FOR CUSTOMERS SUPPLY-
ING THEIR OWN CONDENSATE OR PUMP SYSTEMS.
A. Check the voltage of the motor before making the wiring con-
nection. Some Chromalox boilers are supplied with dual volt-
age systems. The motor should always match the voltage of the
control circuit.
B. The motor circuit should be wired into the pump control as
shown in wiring diagram (float type pump control). If boiler is
equipped with solid state pump control, refer to wiring diagram
and use terminals 5 and 2.
Use Applicable wiring diagrams based on model number and power voltage.
CHPES-6A
1
1
1
CHPES-30A
2
2
3
CHPES-100A
8
8
9
CHPES-9A
1
1
1
CHPES-36A
2
2
3
CHPES-135A
10
11
CHPES-12A
1
1
1
CHPES-48A
4
4
5
CHPES-160A
12
12
CHPES-18A
1
1
1
CHPES-60A
6
6
7
CHPES-180A
10
10
CHPES-24A
2
2
3
CHPES-72A
6
6
7
Export
14
2PS
BR
Heater
Contactors
Feed Water
Boiler On
3
GND
B
FU9
B 1PB
Off
1
GND
1
GND
1 HTR
C1
FU1
FU2
FU3
FU8
FU7
H1
H2
X1
X3
L3
1L1
1L3
1L2
L2
L1
X2
X4
Optional Transformer
1
1
C1
2
2
C4
C3
C2
R
1LT
Y
On
IFS
O
1PS
O
O
W
Feed Water
Electrical
Connection
2
1
1TB
1 2 3
3
GND
1
GND
2
GND
1
HTR
FU9
FU
1PB
Cabinet Exterior Left Side
Cabinet Exterior Right Side
Panel Layout
CR
FU4
FU5
FU6
2L1
2L3
2L2
1
Mtr
Customer
Connect
Feed Water
Motor
10L
30L
20L
IT1
IT3
IT2
CR
Wire Color Code
B
= Black
BR = Brown
R
= Red
O
= Orange
Y
= Yellow
G
= Green
BL = Blue
W = White
* Boilers under 40 Amps total (not fused)
4