Serires KMI
- 16 -
November 4, 2013
If mechanical exhaust or humidistat is used in the building, it is typical to interconnect
these in the heater circuit as shown in figure below.
Do
NOT
connect the Ignitor cable, flame sensor wire and ground wire together!
The Ignitor cable and Sense cable have different size connection that match the
appropriate connection on the ignitor. The ground wire is connected directly onto
one of the adjacent studs.
Push the insulating protector over the Ignitor cable and push it over the Ignitor electrode
after connection.
Single-stage electrical connection / Wiring Diagram
Connect the electrical lead wires to the gas valve control using these symbols (L1, N, and
GND) and make sure to ground the valve.
Make sure the input voltage going to the control assembly is a 24 V 60Hz AC before
connecting to the valve.
L1
N
HUMIDISTAT
L1
N
FAN #2
FAN
RELAY
FAN #1
When using a humidistat to
control exhaust fans, wire the
humidistat to cause the fan to
operate on humidity rise NOT
humidity fall.
Depending on fan horsepower, a
relay may or may not be needed.
Block Diagram for
interconnecting Fan / Humidistat
WIRING DIAGRAM ONE-STAGE
GREEN
S1
HV
PINK
DSI
RED
GREEN
BROWN
YELLOW
GND
V2
V1
TH
GAS VALVE
FLAME SENSOR
IGNITER
BURNER
TRANSFORMER
T'Stat
*
Optional Field Supplied / Wired
NEUTRAL
RED
24V
T'Stat
*
L1
GAS
PRESSURE
SWITCH
120V
GREEN
24V
BL
UE
This Blue wire
is only used with CNE
control module
