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Engineered air EngA M-TRAC4 User's Operation Manual

Direct fired heating controller
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CANADIAN
HEAD OFFICE
AND FACTORY
1401 HASTINGS CRES. SE
CALGARY, ALBERTA
T2G 4C8
Ph: (403) 287-2590
Fax: 888-364-2727
SALES OFFICES ACROSS CANADA AND USA
IOM-33
A
USER OPERATION
MANUAL
M-TRAC4
DIRECT FIRED HEATING CONTROLLER
UNIT MODEL NO. _________________
UNIT SERIAL NO. _________________
SERVICED BY: ___________________
TEL. NO: ________________________
32050 W. 83
DESOTO, KANSAS
Ph: (913) 583-3181
Fax: (913) 583-1406
Retain instructions with unit and maintain in a legible condition.
Please give model number and serial number when contacting
factory for information and/or parts.
www.engineeredair.com
FOR
USA
HEAD OFFICE
AND FACTORY
rd
STREET
66018
CANADIAN
EASTERN FACTORY
1175 TWINNEY DRIVE
NEWMARKET, ONTARIO
L3Y 5V7
Ph: (905) 898-1114
Fax: (905) 898-7244
Dec 16 R4

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Summary of Contents for Engineered air EngA M-TRAC4

  • Page 1 USER OPERATION MANUAL M-TRAC4 DIRECT FIRED HEATING CONTROLLER UNIT MODEL NO. _________________ UNIT SERIAL NO. _________________ SERVICED BY: ___________________ TEL. NO: ________________________ CANADIAN CANADIAN HEAD OFFICE HEAD OFFICE EASTERN FACTORY AND FACTORY AND FACTORY 1401 HASTINGS CRES. SE 32050 W. 83 STREET 1175 TWINNEY DRIVE CALGARY, ALBERTA...
  • Page 2 M-TRAC4 M-TRAC4 The M-TRAC4 has been certified by Intertek (ETL) for use with Engineered Air appliances only. It has been evaluated to CSA C22.2 No. 24 Temperature-Indicating and Regulating Equipment and UL 873 UL Standard for Safety Temperature-Indicating and Regulating Equipment. This is a User Operation Manual and therefore not subject to evaluation.
  • Page 3 M-TRAC4 IOM-33 3 of 18 Dec 16 R4...

  • Page 4: Table Of Contents

    M-TRAC4 TABLE OF CONTENTS INTRODUCTION ................................5 CONTROLLER RATINGS ..............................5 CONTROLLER DESCRIPTION ............................6 TERMINALS ................................6 DIP SWITCHES ................................7 INDICATION AND DIAGNOSTIC LIGHTS ........................7 ADJUSTMENT POTS..............................7 MULTIMETER TEST POINTS ............................8 MAXIMUM DISCHARGE SET POINT LIMIT SETUP (SP LMT) ..................8 CALCULATED SETPOINT (SPC) ............................

  • Page 5: Introduction

    INTRODUCTION The M-TRAC4 is a discharge air temperature controller of variable volume direct-fired Engineered Air equipment. The M-TRAC4 maintains the required burner airflow by modulating the burner profile bypass damper (or return air damper on RE style equipment). The information used in this manual should be used in conjunction with the unit function sheet(s) and the HE (or RE) series Installation, Operation, and Maintenance manual.

  • Page 6: Controller Description

    M-TRAC4 CONTROLLER DESCRIPTION TERMINALS TABLE 1 Terminal Description Input terminal for single discharge sensor Input terminal for two discharge sensors wired in series Sensor common Output from the built in set point POT. Positive supply for a remote set point POT. Return from the remote set point POT.

  • Page 7: Dip Switches

    M-TRAC4 DIP SWITCHES The M-TRAC4 options are configured by DIP switch selection and/or wiring connections. DIP switch settings are noted on the internal wiring diagram, and should not be altered. TABLE 2 DIP SW Description Service Mode. Enable to manually control the firing rate. Air Priority Program.

  • Page 8: Multimeter Test Points

    M-TRAC4 TABLE 4 Description SP LMT Limits the maximum discharge temperature set point. CAL DTEMP Discharge air sensor temperature calibration. SP CAL Setpoint dial calibration. Manually sets burner firing rate for service. Located just above the centre. When the service switch is on, this POT can be used to adjust the SERVICE POT modulating gas valve from low to high fire.

  • Page 9: Profile Plate Velocity

    M-TRAC4 Table 5 Voltage (Vdc) ˚C ˚F NOTE: Sensor accuracy is diminished at temperatures greater than those noted in table 5. PROFILE PLATE VELOCITY The profile plate has been factory set for the airflow shown in the submittal record. The profile plate air velocity status can be determined by reading the DC volts measured between the profile measurement point (located close to terminal S) and terminal N.

  • Page 10: Control

    M-TRAC4 CONTROL SYSTEM TIMING Blower startup: 54 seconds after terminal FS is energized. Low Limit bypass: 4.5 minutes from initial startup, 50 seconds nuisance timer. Trial for ignition: 30 sec. DISCHARGE AIR SETPOINT The M-TRAC4 is a discharge air temperature controller with a built in face mounted set point knob (that is activated by connecting terminal S to SP).

  • Page 11: Damper Control

    M-TRAC4 DAMPER CONTROL The inlet damper actuator(s) is enabled through output terminal DM. The M-TRAC4 allows time for the dampers to open prior to starting the supply blower. BLOWER CONTROL The M-TRAC4 uses output terminal SA to control the supply air fan. There are, however, a number of internal and/or external components that may be required to be functional prior to starting the blower.

  • Page 12: Profile Plate Velocity Sensing System

    M-TRAC4 PROFILE PLATE VELOCITY SENSING SYSTEM The M-TRAC4 has a built in profile pressure sensor to prove and monitor air flow across the burner. This allows the burner to operate safely and efficiently by proving the airflow is within proper air velocity limits. The profile pressure sensor has three non-adjustable air settings: 40, 60 and 120% of normal airflow.

  • Page 13: Operation

    M-TRAC4 OPERATION EXHAUST FAN INTERLOCKING There are a number of different exhaust interlocking options available. Always refer to the wiring diagram and unit function sheet to determine the exact type of interlocking used. The AL output contact may be switched from an alarm output to a exhaust fan enable output contact for control of reverse interlock control systems (DIP sw #6).

  • Page 14: Calibration

    M-TRAC4 CALIBRATION While the burner and M-TRAC4 is factory tested and calibrated, field conditions may affect airflow and sensor readings. After making any calibration adjustment, it may take a few minutes for the M-TRAC4 to reflect the changes. After this time, turn the appliance off for a few seconds, then back on. Re- confirm the calibration.

  • Page 15: Profile Velocity

    M-TRAC4 PROFILE VELOCITY Profile velocity test point readings outside the 3.0 - 6.0 Vdc range generally indicate improper airflow through the burner. Before attempting to adjust the profile velocity ensure the heater is operating at the required nameplate air volume. The Profile Velocity POT is typically set to the ‘12’...

  • Page 16: Air Pressure Sensor

    Once the airflow has stabilized, the timer is reset. Before making any modifications to the profile opening contact Engineered Air. INPUT CONTACTS BY OTHERS Input contacts, such as HS and FS must use mechanical relay (dry) input contacts.
  • Page 17 M-TRAC4 Ensure that the AFB terminal is receiving proper signal as mentioned above, then switch the speed reference signal to the lowest as per the unit function (typically 33% or 50%). It should be adjusted such that when the VFD is at minimum volume, the voltage to the second jumper from the P11 pot should be at minimum.

  • Page 18: M-Trac4 Lock Out Description

    M-TRAC4 M-TRAC4 LOCK OUT DESCRIPTION Table 8 LED Code Reasons Faulty flame relay or wiring error. Ignition control and safety shut off valve should be off (FR and CFR contact ‘open’, but receiving power to VFB120 B Irregular indicating valve is still on. Faulty flame relay or wiring error.

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