Engineered air base User Manual

A base
IOM67 8 February 2021 R0
CD-XM EXPANSION MODULE
A Triac driver slave connected via Modbus
communication to the base, this module controls
the combustion motor speed on DJ indirect fired
heaters. A 3 wire feedback signal is returned to
the module to confirm the blower speed.
PRESSURE PORTS
Marked as H (high side) and L (low side) for use on
direct fired appliances.
Pressure ports may not be included on appliances
that do not require them.
m CAUTION:
Do not blow onto the pressure ports. Excessive
pressure and moisture will damage it. The ports are
fragile and should not be tampered with.
TERMINAL DESIGNATIONS
Terminals indicated change on the humidifier
version.
H N Power Supply
GND Ground
LmA,B Local Modbus
ECO AI EC Motor Common
PWM AI EC Motor Running Speed
ECM AO EC Motor Demand
MHW AO Modulating Heating
MCW AO Modulating Cooling
MEc AO Modulating economizer
MPP AO Profile Plate Actuator
AL DO Alarm
SA DO Supply air
DM DO Damper actuator enable
CMa DO Relay ‘a’ Common
CMb DO Relay ‘b’ Common
STG1 DO Cooling Stage 1
STG2 DO Cooling Stage 2
STG3 DO Cooling Stage 3
STG4 DO Cooling Stage 4
STG5 DO Cooling Stage 5
HiS DO High Speed Exhaust Fan Start
Exl DO Low Speed Exhaust Fan Start
CMc DO Relay ‘c’ Common
MBV AO Modulating Ball Valve
MCA AO Modulating Air Actuator
FbG AI Modulating Gas Valve Feedback
FbA AI Modulating Air Feedback
CP AI Condensate Probe
PV1,2 DO Pilot Valve
SR1,2 DO Safety Relay
FR1,2 DO Flame Relay
FbV DI Feedback Gas Valve
VN DI Feedback Gas Valve Neutral
HL DI High Limit
EnH DI Enable Heat
BFS DI Blocked Flue Switch
CAS DI Combustion Air Switch
CMd DO Relay ‘d’ Common
SDO DO (HE) Dual Flame Rod
SDO DO (DG) Combustion Blower Start
WPu DO Water Pump
FbD AI Feedback Economizer Damper
ASP AI Remote VFD setpoint

Engineered air base Specifications

General

Brand	Engineered air
Model	base
Category	Controller
Language	English