Modine Manufacturing MDB Installation And Service Manual
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Modine Manufacturing MDB Installation And Service Manual

Modine Manufacturing MDB Installation And Service Manual

Direct-fired make-up air units
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W arninG
improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death, and could cause
exposure to substances which have been
determined by various state agencies to
cause cancer, birth defects, or other
reproductive harm. read the installation,
operating, and maintenance instructions
thoroughly before installing or servicing
this equipment.
For Your saFetY
iF You smell Gas:
1. open windows (indoor installation only).
2. do not touch electrical switches.
3. extinguish any open flame.
4. immediately call your gas supplier.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
installation and service manual
THIS MANUAL IS THE PROPERTY OF THE OWNER.
direct-fired make-up air units
models mdB/mrB
Model MDB is ETL certified to
meet the U.S. and Canadian
requirements in the latest version
of ANSI Standard Z83.4, Non-
Recirculating Direct Gas-Fired
Industrial Air Heaters.
For Your saFetY
the use and storage of gasoline or other
flammable vapors and liquids in open
containers in the vicinity of this appliance
is hazardous.
imPortant
the use of this manual is specifically
intended for a qualified installation and
service agency. a qualified installation and
service agency must perform all installation
and service of these appliances.

inspection upon arrival

1. Inspect unit upon arrival. In case of damage, report it
immediately to transportation company and your local
Modine Manufacturing sales representative.
2. Check rating plate on unit to verify that power supply meets
available electric power at the point of installation.
3. Inspect unit upon arrival for conformance with description of
product ordered (including specifications where applicable).
7-500.10
5H0734540001
August, 2018
Model MRB is ETL certified to
meet the U.S. requirements only
in the latest version of ANSI
Z83.18, Recirculating Direct
Gas-Fired Industrial Air Heaters.

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Summary of Contents for Modine Manufacturing MDB

  • Page 1: Inspection Upon Arrival

    5H0734540001 August, 2018 installation and service manual direct-fired make-up air units models mdB/mrB Model MDB is ETL certified to Model MRB is ETL certified to meet the U.S. and Canadian meet the U.S. requirements only requirements in the latest version in the latest version of ANSI of ANSI Standard Z83.4, Non-...

  • Page 2: Special Precautions

    All appliances must be wired strictly in accordance with the wiring diagram furnished with the unit. Any For model MDB (100% Make Up Air) units, all air to wiring different from the wiring diagram could result in a the unit must be ducted directly from the outdoors.

  • Page 3: Table Of Contents

    Unit and Accessory Weights ......40 For model MDB (100% Make Up Air) units, all air Maintenance .

  • Page 4: Sound And Vibration Attenuation

    mountinG oPtions sound and vibration levels mountinG oPtions All mechanical equipment generates some sound and vibration suspended units which may require attenuation. Locate the equipment away Combination lifting and support lugs are supplied with each from critical areas whenever possible. Frequently, units can be unit.

  • Page 5: Rail Mounted Units

    mountinG oPtions rail-mounted units slab-mounted units If mounting on a roof, the roof structure must be For ground level installation of the unit, prepare a level adequately designed to support the live weight load of the concrete slab at least 4" thick, which extends 6 inches unit and rail mounting support structure.

  • Page 6: Roof Curb Mounted Units

    mountinG oPtions / rooF curB installation roof curb-mounted units inlet accessory support An optional 14" or 24" high roof curb is available to simplify If the unit has unsupported inlet accessories such as V-bank site preparation and raise the unit above roof water and snow filters and/or inlet hood, a method of support is required as levels.

  • Page 7: Duct Installation

    duct installation / utilitY location / riGGinG instructions Fire dampers duct installation Fire dampers (supplied by others) installed in the inlet or To assure proper air flow from the discharge of the unit, follow outlet duct systems shall be provided with electrical interlocks these recommendations.

  • Page 8: Unit Installation

    unit installation unit installation 3. After threading and reaming the ends, inspect piping and remove loose dirt and chips. 1. Follow site preparation instructions for applicable curb, rail, 4. Support piping so that no strains are imposed on the unit or slab mounting.

  • Page 9: Manifold Arrangements

    Optional manifold arrangements are available to comply with and up to 720,000 Btu/hr Factory Mutual (FM) requirements. Fm manifolds All Modine Manufacturing standard ETL manifolds up to START OF FACTORY FURNISHED AND PIPED and including 2,500,000 Btu/Hr meet FM safety control COMPONENTS requirements.

  • Page 10: Electrical Connections

    installation / Prior to oPeration electrical connections 9. Refer to the wiring diagram for the terminal location of all WarninG wiring. note: If the unit is not factory supplied with an optional timed 1. Disconnect power supply before making wiring connections freeze protection (low-temperature system), then a low- to prevent electrical shock and equipment damage.

  • Page 11: Controls Descriptions

    control descriPtions high temperature limit control (Fl-02) Before continuing with the start-up and checkout procedure, it is important to familiarize yourself with the controls furnished The high temperature limit control prevents the burner from with the unit. Review the documents shipped with the unit to firing if excessive heated air temperatures are experienced.
  • Page 12 control descriPtions main Burner/Pilot safety Flame rods Figure 12.2 - combination Gas valve (vG-05) A flame rod is a flame-sensing device that senses if the pilot has been established using the flame rectification principle. The flame rod monitors the pilot flame to assure it is established.
  • Page 13 control descriPtions modulating temperature controls maXitrol system 14 Units are supplied with modulating temperature controls and discharge air temperature control gas valve. System 14 is an electronic modulating discharge air temperature Depending on the type of gas and temperature controls ordered control system with a remote temperature dial for adjusting the with the unit, one or more of the following devices will be used.
  • Page 14 0-10VDC input signal (by others) to control the discharge air thermostat to control the main burner firing rate based on the temperature. This system is available on MDB units only. room air temperature set point. The stat monitors the room...
  • Page 15 For MDB units, the VFD will vary the motor speed between 40% and 100% of the rated airflow for the selected unit. For...

  • Page 16: Controls Locations

    oPtional controls / controls locations Figure 16.1 deadfront non-Fused disconnect switch (sW-01) deadfront non-Fused disconnect (Mounted in the electrical control cabinet when furnished) WarninG If equipped with the Deadfront Disconnect Switch option, when the switch is in the “OFF” position, supply power remains energized at the supply power terminal strip and the top of the dead front disconnect switch.

  • Page 17: Gas Controls

    PiPinG control caBinet comPonents Figure 17.3 - typical Gas control string 720 through Figure 17.1 - typical Gas control string through 400 mBh 1000 mBh Figure 17.2 - typical Gas control string over 400 mBh through 720 mBh Figure 17.4 - typical Gas control string over 1000 mBh 3 (inside cover) 1.

  • Page 18: Start-Up Procedure

    start-uP Procedure controls locations 13. Check the blower speed (rpm). For units equipped with caution a VFD, blower speed should be checked at both high and low speeds. (See page 21 for motor and blower adjustment). 1. Do not operate unit with a gas input rate greater than that 14.
  • Page 19 Model Digit 17=A represents single speed units. over the ends of the aluminum pickup tubes. Model Digit 17=B thru H represents variable frequency drive units (on Model MDB only). Model Digit 17=F thru N represents return air units (on Model MRB only).
  • Page 20 start-uP Procedure start-up Procedure (continued) Figure 20.1 - Profile Pressure Pickup tube reference views If the required differential cannot be achieved, the blower speed may have to be adjusted. Refer to page PS-10 - LOW PS-11 - HIGH AIRFLOW 25 for blower adjustments. AIRFLOW SWITCH CUTOFF SWITCH (NORMALLY OPEN)

  • Page 21: Blower/Motor Adjustment

    start-uP Procedure Final step Steps 34-35 must be performed on LOW SPEED if unit is equipped with a VFD. If the unit does not have a VFD, proceed to step 36. After all of the initial start-up procedures have been performed, the unit is ready for commissioning.

  • Page 22: Adjusting Burner Profile Pressure Differential

    To adjust the position of the burner profile plates, the unit MUST meet the following criteria: around the burner needs to increase by moving the top • Digits 1-3 of the Model Number must be “MDB”. plate up and the bottom plate down. • Serial Number Digit 18 must be “A”.

  • Page 23: Setting The Dirty Filter Switch

    start-uP Procedure setting the dirty Filter switch Since the position of the burner profile plates has changed from the setting at the factory, the air volume delivered The dirty filter pressure switch is factory installed in the piping by the unit has changed. Re-check the motor amp draw section.

  • Page 24: Sequence Of Operation

    start-uP Procedure sequence of operation Figure 24.1 - typical remote control Panel (Shipped separately for mounting by others) remote switch in “off” Position With the Summer/Off/Winter switch in the “Off” position, the unit is shut down and neither the blower nor the burner will operate. remote switch in “summer”...

  • Page 25: Control Applications

    - 100% makeup air units - model mdB Tables 25.1 through 25.3 show the sequence of operation for 100% Makeup Air Two Speed and VFD Airflow Control Options and associated Control Types. Note that in all cases, the controlling thermostat is based on the gas controls selected and the firing rate control is not controlled by the night setback thermostat.
  • Page 26 control aPPlications - return air units - model mrB Tables 26.1 through 26.2 show the sequence of operation for Return Air Two-Position and Floating Airflow Control Options and associated Control Types. Note that in all cases, the controlling thermostat is based on the gas controls selected and the firing rate control is not controlled by the night setback thermostat.

  • Page 27: General Performance Data

    ETL certified maximum allowable discharge air temperature is 105°F. Maximum air temperature rise is 115°F for Natural Gas, 100°F for LP Gas. (LP only available on model MDB units) l Maximum Btu/hr based on max CFM and temp rise with -30°F entering air. Actual max Btu/hr may be lower depending on job conditions.
  • Page 28 static Pressure droP data table 28.1 - accessory static Pressure drop data (inches W.c.) model size 2600 0.15 0.18 0.19 0.01 0.06 0.01 0.04 0.08 0.05 0.05 0.05 0.41 2600 2800 0.18 0.20 0.22 0.01 0.07 0.02 0.05 0.09 0.06 0.05 0.05 0.47...
  • Page 29 static Pressure droP data table 29.1 - accessory static Pressure drop data (inches W.c.) model size 16000 0.12 0.14 0.16 0.01 0.10 0.01 0.07 0.14 0.05 0.04 0.04 0.25 16000 18000 0.14 0.17 0.20 0.02 0.13 0.02 0.09 0.17 0.06 0.06 0.06 0.31...

  • Page 30: Blower Performance Data

    BloWer PerFormance data table 30.1 - unit Performance table total static Pressure (“W.c.) 0.25 0.75 1.25 1.75 model size BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm 1600 0.49 0.59 1800...
  • Page 31 BloWer PerFormance data table 31.1 - unit Performance table total static Pressure (“W.c.) 0.25 0.75 1.25 1.75 model size BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm BhP rPm 10000 2.45 3.08 12000...

  • Page 32: Blower Sheave Assembly Data

    BloWer sheave assemBlY data table 32.1 - sheave turns open data adjustable motor sheave turns open setting adjustable motor sheave turns open setting 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 571 552 533 514 495 476 456 437 418 399 380 1117 1080 1043 1005 968 931 894 857 819 782 745 654 638 621 605 589 573 556 540 524 507 491...
  • Page 33 this PaGe intentionallY leFt BlanK 7-500.10...

  • Page 34: Unit And Accessory Dimensions

    (4) 20 x 20 x 2 115-118 (6) 20 x 25 x 2 (6) 20 x 25 x 2 table 34.2 - mdB / mrB unit dimensions (all dimensions in inches) SIZE 24/36 j 24/36 j Note: All accessories shipped completely assembled for easy installation. Some accessories shipped separately. All data subject to change.
  • Page 35 (6) 20 x 25 x 2 (10) 20 x 20 x 2 (9) 16 x 25 x 2 (10) 20 x 25 x 2 table 35.2 - mdB / mrB unit dimensions (all dimensions in inches) model size 24 7/8 24 7/8 18 9/16...
  • Page 36 (36) 20 x 25 x 2 (18) 20 x 25 x 2 table 36.2 - mdB / mrB unit dimensions (all dimensions in inches) SIZE Note: All accessories shipped completely assembled for easy installation. Some accessories shipped separately. All data subject to change.
  • Page 37 (10) 20 x 20 x 2 (10) 20 x 25 x 2 table 37.2 - mdB vertical unit dimensions (all dimensions in inches) SIZE Note: All accessories shipped completely assembled for easy installation. Some accessories shipped separately. All data subject to change.
  • Page 38 rooF curB dimensions Figure 38.1 - roof-curb dimensions - size 110-130 1-3/4 1-3/4 CURB DETAIL CURB DETAIL FLOOR/BASE CASING 1-3/4 BASE PAN CASING BASE FRAME DISCHARGE 3-1/4 1-3/4 GASKET GASKET 14 or 24 WOOD NAILER 1-3/4 14 or 24 14 or 24 DISCHARGE CURB RETURN...
  • Page 39 evaPorative coolinG unit dimensions Figure 39.1 - evaporative cooling module EVAP. MEDIA AND EVAP. MEDIA AND ACCESS DOORS ACCESS DOORS DISTRIBUTION PADS DISTRIBUTION PADS OPTIONAL GALVANIZED OPTIONAL GALVANIZED STAINLESS STEEL BOTH SIDES STAINLESS STEEL BOTH SIDES STEEL INLET HOOD STEEL INLET HOOD EVAP COOLER EVAP COOLER PERMANENT...

  • Page 40: Unit And Accessory Weights

    unit and accessorY WeiGhts Figure 40.1 - unit Weights UNIT PLAN VIEW INLET INLET V-BANK DISCHARGE DISCHARGE HOOD DAMPER FILTER UNIT DAMPER LOUVER ROOF CURB table 40.1 - unit Weights (all weight in pounds) model type digit 7 digit 19 A or B 1200 1275...

  • Page 41: Maintenance

    maintenance caution note: If air pressure alone is not sufficient to clean the burner gas ports, the ports may be cleaned by using the appropriately sized bit from a NUMBERED DRILL SET. When using a drill bit to clean the burner gas ports, do not Check the manufacturer’s name stamped on the burner distort or enlarge the ports.

  • Page 42: Service And Troubleshooting

    If the preceding service diagnostics do not solve your problem, contact your local Modine Manufacturing sales representative for further assistance. Please be sure to have the complete model number and serial number from the unit’s rating plate available before calling for service...
  • Page 43 Check power supply to motor. If the preceding service diagnostics do not solve your problem, contact your local Modine Manufacturing sales representative for further assistance. Please be sure to have the complete model number and serial number from the unit’s rating plate available before calling for service...

  • Page 44: Control Definitions

    this PaGe intentionallY leFt BlanK 7-500.10...

  • Page 45: Start-Up Report

    7-551 September, 2006 direct Gas-Fired make-up air unit start-up report Job Name: Date: Address: Model No.: City & State: Order No.: Start-Up Check List “all items must Be checKed” Serial No.: 1. All shipping straps, braces, tie downs removed? 2. Unit installed level and secure? 3.

  • Page 46: Replacement Parts Ordering

    rePlacement Parts orderinG ordering When servicing, repairing or replacing parts on these units, locate the serial plate of the unit and always give the complete model number and serial number from the serial plate. The serial plate is located on the door of the electrical control box. Figure 46.1 - serial Plate example j MRB units are certified for use in the U.S.

  • Page 47: Model Nomenclature/Serial Number Format

    5 - TE C - Propane Gas (11-14") (Model MDB Only) 6 - TE - High Efficiency D - Propane Gas (1-5 psi) (Model MDB Only) 22 - sheave arrangement (sa) A - (see Sheave Tables) 23 - Profile assembly (Pa) A - (Internally assigned) Figure 47.1- unit configurations j...
  • Page 48 Burners High Intensity Infrared Units sheet metal Parts All Products As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and specifications without notice. Building hvac Modine Manufacturing Company 1500 DeKoven Avenue Racine, WI 53403 Phone: 1.800.828.4328 (HEAT)

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