Engineered air base User Manual Download Page 7 | Manualshive

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A

base

IOM67

7

February 2021 R0

Standard Version

Humidifier Version

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Summary of Contents for base

Page 1: ...tion adjustment and operation of this unit Read and understand these instructions thoroughly before attempting installation or operation Failure to follow these instructions may result in improper installation adjustment service or maintenance possibly resulting in fire electrical shock carbon monoxide poisoning explosion personal injury or property damage www engineeredair com ...

Page 2: ... drawings and function sheets provided with the appliance One set is in an envelope which also contains the Operation Installation and Maintenance manual s This package is for copying then should either be returned to the appliance or stored in a safe place The other set is attached to the control panel door and should never be removed Copyright This document and the information in it are the prop...

Page 3: ...ted to high voltages Electrical shock could occur if instructions are not followed This equipment contains moving parts that can start unexpectedly Injury or death could occur if instructions are not followed All work must be performed by a qualified technician Always disconnect and lock out power before servicing DO NOT bypass any interlock or safety switches under any circumstances m CAUTION All...

Page 4: ...MMUNICATION 5 COMPUTER CONNECTION 5 ALARM RESET 6 LED LIGHTS 6 SEVEN SEGMENT DISPLAY 6 CD XM EXPANSION MODULE 8 PRESSURE PORTS 8 TERMINAL DESIGNATIONS 8 APPLIANCE TYPES 9 DJ STYLE INDIRECT FIRED 9 DG STYLE INDIRECT FIRED 9 HE DIRECT FIRED 10 STAGED COOLING 10 SH X HUMIDIFIER 10 ALARMS 11 ...

Page 5: ...lid state switches Input switching must be mechanical COMMUNICATION Direct connection may be made to a laptop computer using a Cat 5 cable Once connected and correctly configured a web page will appear showing the various operational conditions and settings COMPUTER CONNECTION m Notice The base requires a connection to a computer for detailed information beyond what is indicated on the LED display...

Page 6: ...ns specific to gas fired heating and mechanical cooling have a number sequence included to describe the current operating mode ALARM RESET Alarms may be reset either from the laptop computer alarm screen or the red reset button near the top left LED LIGHTS Light Description Function Green Power ON Powered OFF No Power to H N Yellow Communication BLINK Comm to CD XM ON Internal Comm OFF Failure Red...

Page 7: ...A base IOM67 7 February 2021 R0 Standard Version Humidifier Version ...

Page 8: ...O 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 Sp...

Page 9: ...en open the main safety valve SSOV After a time delay the pilot valve IS disabled The burner is allowed to operate from low fire to high fire at a 15 1 turndown ratio to maintain the requested discharge air temperature by modulating the control valve and the combustion blower speed If heating is not required the burner will be disabled and the combustion blower will enter a post purge time and the...

Page 10: ...r a Maxitrol magnetic style modulating valve or an actuator and ball valve combination Variable air volume systems include a burner bypass damper which modulates to maintain the correct burner profile pressure drop STAGED COOLING For staged compressor operation the base will sequence on and off up to 5 compressor stages to attempt to maintain the discharge temperature setpoint As with all staged s...

Page 11: ...alve feedback has power before the FR and SR contact are energized 81 Gas Valve out of range Gas valve actuator feedback is greater or less than the demand Timed event 86 High Limit High limit safety tripped due to excessively high temperature 87 Flame Relay Wiring Received a gas valve feedback within 500ms of activating the Flame relay output 88 Flame Failure Gas valve feedback has no power after...

Page 12: ...point during modulation for more than 90 seconds 94 Low Pressure Air flow too low to enable heating 95 Low Pressure Sensor Unable to zero the pressure before the damper has opened 96 Very Low Pressure Occurs if the pressure drops below the very low pressure setpoint after the purge has been completed 97 Far Sensor Flame Failure Occurs if a secondary flame rod is enabled and flame sensing is lost i...

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