EngA CenCon

CenCon
36
TERMINAL DESCRIPTION
Terminal
Type
Name
Description
Value
H N
Power Supply
24 Vac
GND
Ground
Connect to chassis.
LmA B
Modbus
Internal
Network
FbG
AI
Feedback Gas
Compares
the ball valve actuator feedback signal to the
demand signal.
0-10 Vdc
MBV
AO
Modulating ball
valve
Modulating gas valve actuator output. 0-10 Vdc
MPP
AO
Profile
pressure
Modulating profile pressure damper actuator output 0-10 Vdc
HiE
DI
High Speed
Enable
Initiate high speed operation. 24 Vac
EnH
DI
Enable heat
24V must be applied to allow heating function.
24/120 Vac
CM
COM
Relay Common
Relay input power common to digital outs
24/120 Vac
HiS
DO
High Speed
High speed fan start contact
24/120 Vac
Exl
DO
Exhaust fan
low
Single or low speed exhaust fan start contact
24/120 Vac
DFR
DO
Dual Flame Rod
Relay output to switch flame rods.
24/120 Vac
WPu
DO
Water Pump
Enable evaporative ‘swamp’ cooler water pump.
24/120 Vac
PV1, PV2
DO
Pilot valve
Disables the pilot flame once the main burner has been
established.
24/120 Vac
SR1, SR2
DO
Safety relay
Secondary safety lockout contacts
24/120 Vac
FR1, FR2
DO
Flame relay
Flame relay enable contacts.
24/120 Vac
FbV
D
I
Feedback valve
Feedback signal
from the safety shut off valve (SSOV).
Wired directly to valve.
24/120 Vac
VN
Valve neutral
Neutral feedback signal from the safety shut off valve
(SSOV).
HL
DI
High limit
Normally closed, opens on high temperature.
24 Vac
MX1, MX2
AO
Maxitrol Valve
DC current output to the Maxitrol modulating valve.
mA