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Modine Manufacturing PDP - User Manual

Modine Manufacturing PDP
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October, 2008
INSTALLATION AND SERVICE MANUAL
gas-fired unit heaters
models PDP and BDP
6-580.4
5H78213A Rev. E
WARNING
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.
All models approved for use in California by the CEC (when
equipped with IPI), in New York by the MEA division, and in
Massachusetts. Unit heater is certified for non-residential
applications.
Inspection on Arrival
1. Inspect unit upon arrival. In case of damage, report
immediately to transportation company and your local
Modine 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 received for conformance with description of
product ordered (including specifications where applicable).
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don’t touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
CAUTION
To prevent premature heat exchanger failure
do not locate ANY gas-fired units in areas
where chlorinated, halogenated, or acid vapors
are present in the atmosphere.
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.
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.
THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.

Table of Contents

Questions and Answers

  • E
    Emily BrownAug 21, 2025
    What to do if the main burners do not light on my Modine Manufacturing Gas Heater, but the pilot is lit?
    • A
      Andrew TaylorAug 21, 2025
      If the pilot light is on but the main burners of your Modine Manufacturing Gas Heater won't ignite, consider these possibilities: * The valve could be defective. Replace the valve. * There might be loose wiring. Check the wiring to the gas valve. * The pilot sensor could be defective. Replace the pilot sensor. * The ignition controller might be defective. Replace the ignition controller. * The thermostat wiring might be improper. Verify the wiring compared to the wiring diagram.
  • S
    sabrina48Aug 25, 2025
    How to troubleshoot excessive heat from a Modine Manufacturing Gas Heater?
    • M
      Mackenzie LeeAug 25, 2025
      If your Modine Manufacturing Gas Heater is producing too much heat, consider these potential causes: * The thermostat might be malfunctioning. Check or replace the thermostat. * The gas controls might not be shutting off. Check the unit wiring against the wiring diagram and look for loose or worn wires. * The main gas pressure could be set too high. Adjust it to a maximum of 14" W.C. * The gas valve might be defective. Replace the gas valve.
  • C
    Catherine JohnsonAug 27, 2025
    Why does my Modine Manufacturing Gas Heater have yellow tipping flames?
    • Z
      Zoe RiveraAug 27, 2025
      Yellow tipping flames in your Modine Manufacturing Gas Heater can be due to: * Insufficient primary air. Increase the primary air. * A dirty orifice. Check the orifices and clean them with compressed air if necessary. * A misaligned orifice. Check the manifold, and replace it if necessary. Keep in mind that with propane gas, some yellow tipping is always present.
  • R
    Rebecca Powell PhDAug 30, 2025
    What causes flame rollout in a Modine Manufacturing Gas Heater?
    • R
      Ricardo HughesAug 30, 2025
      Flame rollout in your Modine Manufacturing Gas Heater can be caused by: * The main pressure being set too high. Adjust to a maximum of 14" W.C. * An orifice that is too large. Check the orifice size with those listed on the serial plate. * A blocked vent. Clean or correct the venting system.
  • M
    Michelle TerrySep 2, 2025
    Why are the flames lifting in my Modine Manufacturing Gas Heater?
    • M
      Mrs. Taylor Hall PhDSep 2, 2025
      Lifting flames in your Modine Manufacturing Gas Heater can be attributed to: * Too much primary air. Reduce the primary air. * The main pressure set too high. Adjust to a maximum of 14" W.C. * An orifice that is too large. Check the orifice size with those listed on the serial plate.
  • R
    reneeestradaSep 5, 2025
    What causes floating flames in a Modine Manufacturing Gas Heater?
    • R
      reynoldsdeborahSep 5, 2025
      Floating flames in your Modine Manufacturing Gas Heater can result from: * Insufficient primary air. Increase primary air. * Main pressure set too high. Adjust to a maximum of 14" W.C. * Orifice too large. Check orifice size with those listed on the serial plate. * Blocked vent. Clean or correct venting system.
  • A
    Allison FullerSep 8, 2025
    What causes flashback in a Modine Manufacturing Gas Heater?
    • K
      Kelly DavisSep 8, 2025
      Flashback in a Modine Manufacturing Gas Heater can occur due to: * Too much primary air. Reduce primary air. * Main pressure set too high. Adjust to a maximum of 14” W.C. * Orifice too large. Check orifice size with those listed on the serial plate.
  • A
    Alexandria WilsonSep 12, 2025
    Why are the flames wavering in my Modine Manufacturing Gas Heater?
    • S
      sanchezjasonSep 12, 2025
      Wavering flames in your Modine Manufacturing Gas Heater can be caused by: * Drafts across the burner. Eliminate drafts. * Misalignment of the burner. Align the burner on the locator pins. * A cracked heat exchanger. Replace the heat exchanger.
  • J
    joelphillipsNov 14, 2025
    How to fix a Modine Manufacturing Gas Heater when the pilot does not light?
    • K
      kennedyloriNov 14, 2025
      If the pilot light on your Modine Manufacturing Gas Heater won't light, there are several potential causes and solutions: * The main gas might be off. Open the manual gas valve. * The power supply could be off. Turn on the main power. * There might be air in the gas line. Purge the gas line. * The pilot orifice may be dirty. Check for a plugged pilot orifice and clean it with compressed air if necessary. * The gas pressure might be out of range. Adjust it to a maximum of 14" W.C., with a minimum of 6" W.C. for Natural Gas or 11" W.C. for Propane Gas. * The pilot valve may not be opening. Check the wiring for 24 volts to the valve. The ignition controller could be defective, in which case, replace it. Alternatively, a fuse on the control board might be blown; replace the fuse. ...
  • Y
    yeverettNov 17, 2025
    Why is my Modine Manufacturing Gas Heater not producing enough heat?
    • K
      Kristen SmithNov 17, 2025
      If your Modine Manufacturing Gas Heater isn't producing enough heat, consider the following potential causes: * The unit may be cycling on a high limit. Clean or correct the duct system. Adjust to a maximum of 14" W.C. Check and correct to ensure the blower motor operates within 45 seconds of when gas controls are energized. A loose belt can cause this issue, so adjust the belt tension. If the blower speed is too low, check and correct the blower drive settings for proper RPM. A blocked or damaged venting system can also be the cause, so check and correct the venting system. If the air distribution baffle is removed (high-temperature rise units only), replace it. The high limit switch could be defective, so replace it. * The main pressure might be set too low. Adjust the main gas pres...

Summary

Initial Safety and Handling

General Safety Precautions

Covers immediate safety actions for gas leaks, flammable vapors, and installation warnings.

Unit Arrival Inspection

Details the necessary checks when the unit is received.

Hazard Warnings and Precautions

Hazard Intensity Levels

Explains the definitions of DANGER, WARNING, CAUTION, and IMPORTANT severity levels.

Critical Installation Warnings

Lists specific warnings and precautions to prevent damage or injury.

Unit Placement and Clearances

Location Recommendations

Provides guidelines for selecting an appropriate installation site for the unit.

Clearance Requirements

Specifies minimum distances to combustible materials and for service access.

Installation: Lifting, Suspension, and Venting

Unit Lifting and Suspension

Details methods for safely lifting and mounting the unit.

Venting Safety and Instructions

Outlines essential safety warnings and general instructions for venting the unit.

Venting Specifications

ANSI Venting Requirements

Details categorized venting requirements based on pressure and condensation.

Venting Termination Guidelines

Illustrates and describes proper vent termination for various roof pitches and obstructions.

Horizontal Venting Requirements

Category III Venting Procedures

Lists specific instructions for horizontal Category III venting, including sealing and pipe lengths.

Vent Terminals and Construction

Describes approved vent terminals, construction through walls, and termination clearance rules.

Gas Connections

Gas Supply Safety and Pressure

Covers warnings, cautions, and important notes regarding gas supply and pressure.

Piping and Installation Guidelines

Details piping, shut-off valves, sediment traps, and gas pipe capacity tables.

Electrical and Ductwork Installation

Electrical Connection Safety

Provides warnings and cautions for safe electrical hookups.

Ductwork Installation Best Practices

Offers important notes and recommendations for ductwork installation.

Blower Speed Determination

Explains how to determine the correct blower speed for optimal performance.

Blower Adjustments

Blower Speed Adjustment

Outlines steps for adjusting the motor sheave and checking blower RPM.

Belt Tension and Sheave Alignment

Covers setting belt tension and checking sheave alignment.

Start-Up and Burner Adjustments

Pre-Start Up Checks

Lists critical checks before powering up the unit.

Pilot Burner Adjustment

Details how to adjust the pilot flame for optimal operation.

Main Burner Adjustment

Explains how to adjust the main burner pressure and flame.

Manifold and Flame Control

Manifold Pressure Adjustment

Guides on adjusting manifold pressure using a manometer and gas consumption data.

Burner Flame Control Methods

Explains flame adjustment for natural gas and propane using manifold and air shutters.

Control System Operation Sequences

Single and Two-Stage Controls

Describes the operational steps for single and two-stage gas controls.

Mechanical Modulating Control Sequence

Explains the sequence for mechanical modulating gas controls and their dial settings.

Optional Unit Features

Gas Valve Options

Details single-stage, two-stage, and mechanical modulation gas valve options.

Ignition and Control Options

Describes ignition controllers, time delay relays, and low voltage terminal boards.

Electrical Details and Options

Standard Unit Options

Describes standard options like transformers, high limit switches, pressure switches, power exhausters, and blower motors.

Electrical Data Tables

Provides electrical specifications for propeller and blower units.

General Performance Data

Propeller Unit Performance

Presents performance metrics and motor data for propeller models.

Blower Unit Performance

Shows performance metrics and motor data for blower models.

Blower Performance with Filters

Performance Data with Filters

Details blower performance with filters under various static pressures.

575 V Selection Notes

Provides important notes for selecting 575V components.

Detailed Blower Performance

Performance with Blower Enclosure

Provides performance data for blower units with enclosures and filters.

575 V Drive and Sheave Selection

Offers specific guidance for 575V motor and drive selection.

Blower Model Specifications

Power and Drive Data

Lists power requirements and drive/sheave specifications for blower models.

Nozzle Performance Data

Nozzle Mounting and Throw

Details mounting height, heat throw, and heat spread for different nozzle types.

Propeller Hood Performance Data

Downward Deflector Hoods

Provides performance data for 30°, 60°, and 90° downward deflector hoods for propeller units.

Blower Hood Performance Data

Downward Deflector Hoods

Shows performance data for 30°, 60°, and 90° downward deflector hoods for blower units.

Propeller Unit Dimensions

PDP Model Dimensions

Presents dimensional drawings and a table of measurements for PDP propeller units.

Blower Unit Dimensions

BDP Model Dimensions

Provides dimensional drawings and a table of measurements for BDP blower units.

Unit Maintenance

General Unit and Component Checks

Outlines routine cleaning and checks for the unit, electrical, gas, propeller, and blower assemblies.

Assembly Removal Procedures

Details the steps for removing the manifold and burner/pilot assemblies.

Troubleshooting Guide

Pilot and Main Burner Issues

Addresses problems with pilot and main burners not lighting or operating correctly.

Troubleshooting Flame Conditions

Flame Appearance Issues

Addresses issues like flashback, floating flames, and flame rollout with visual references.

Unit Identification

Rating Plate Information

Explains how to read and interpret the unit's model, serial number, and rating plate details.

Commercial Warranty

Warranty Terms and Exclusions

Outlines the warranty periods and exclusions for various unit components.

Modine Manufacturing PDP Specifications

General IconGeneral
Fuel TypeNatural Gas or Propane
DimensionsVaries by model
WeightVaries by model
Voltage115V or 208/230V
Gas Connection Size1/2" or 3/4" NPT
Efficiency80%
Thermostat ControlOptional

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