Mr. Heater MH25LP / MH25NG operating instructions Table of Contents

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WARNINGS

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operation, and maintenance instruc- tions thoroughly before installing or servicing this equipment. For assistance or additional informa- tion consult a qualified installer, service agency, or gas supplier.

WARNING: When used without fresh air, heater may give off CARBON MONOXIDE, an odorless poisonous gas. OPEN WINDOW AN INCH OR TWO FOR FRESH AIR WHEN USING HEATER.

WARNING: This heater is equipped with a PILOT LIGHT SAFETY SYSTEM. DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM.

WARNING: If heater shuts off, do not relight until you provide fresh air. If heater keeps shutting off, have it serviced. Keep burner and control clean. Open door for 5 minutes.

Maintain clearances as shown in Figure 2 or on heater nameplate.

•DO NOT USE MATCH OR OTHER FLAME FOR LEAK TESTING.

•DO NOT EXCEED 1/2 PSI INLET PRESSURE TO HEATER.

DANGER: Carbon monoxide poisoning may lead to death.

Carbon Monoxide Poisoning:

Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.

CAUTION

•Never connect gas valve or thermostat to line voltage or a transformer.

•If the infra-red color of the grid becomes dull when the building furnace is operating, consult gas supplier on correct gas supply piping sizes.

•This heater is for indoor installation only!

NOTE

Gasket binder material used in this heater assembly will temporarily emit an odor and/or vapor. This condition will clear up in approximately 20 minutes and thereafter will not reoccur. Refer to Chapter 2 for ventilation.

 

 

TABLE OF CONTENTS

 

Chapter

Title

Page

I

Introduction

3

II

Heater Installation

5

III

Heater Operating Instructions

10

IV

Operator Maintenance Instructions

12

V

Replacement Parts List

15

Model # MH25NG/LP

HS25NG/LP

2 Installation instructions and Owner’s Manual

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Contents GAS Fired INFRA-RED Workshop Heater What to do if YOU Smell GASTable of Contents Purpose of Equipment Chapter IntroductionEquipment Models Covered in this ManualBTU Ratings and Supply Pressures Heater Dimensions and Orifice SizesGeneral Information NfpaOnly Flue Side of Heater can be Elevated 30o Chapter Heater InstallationGeneral Installation Information and Requirements Heater Side Reflector Must be HorizontalHeater Mounting Instructions Heater Mounting Information Gas Supply Requirements Connecting Heater to GAS SupplyPiping Installation Piping RequirementsTypical Piping Installation Pressure Operating Safety Instructions Heater StartupChapter Heater Operating Instructions Heater Shutdown Lighting of Pilot BurnerAdjusting the Pilot Flame Chapter Operator Maintenance InstructionsTroubleshooting InletFrequency of Operator Checks Symptoms Causes SolutionsReplacing the GAS Valve Unit Gas control knob Is hard to turn or push down, orPlease do not Return this Appliance to Your Store If Service is RequiredChapter Replacement Parts List ALL Warranty Claims Require Proof of Purchase Keep this warranty Can 1-2.16-M81 Ansi Z83.6b-1993Garantie cette Conservez 1993-6b.Z83 AnsiM81-16.2-1 can Clature Description Nomen DE N ’ARTICLE N Magasin Votre À Appareil CET PAS Retournez NE Rechange DE Pièces DES Liste V ChapitreNécessaire EST Réparation UNE SI Si remplacée être doit gaz de commande La GAZ DE Soupape LA DE RemplacementSolutions Causes Symptômes ’UTILISATEUR PAR Inspections DES FréquenceFlamme La de approprié Réglage .11 Figure DépannageDu dissipation la permettre pour minutes 5 Attendez Veilleuse la de Allumage .10 FigureRadiateur DU Arrêt Gaz de soupape la de Composants .9 Figure Remarque Manuelle GAZ DE Commande DE BoutonRadiateur DU D’UTILISATION Notice III Chapitre Sécurité DE ConsignesTuyauterie la de type Installation .7 Figure Cm 7,6GAZ EN L’ALIMENTATION À Radiateur DU Connexion Câblage de Schéma .4 FigureJoint À Pâte DE Modérée Quantité UNE Utilisez Radiateur du montage de Directives .3 Figure Figure LA VoirRadiateur DU Montage DE InstructionsPuissance Radiateur DU Installation II ChapitreRelativement Exigences ET Généraux Renseignements Généraux Renseignements Orifices des tailles et radiateur du Dimensions .2 Tableau’alimentation pressions et BTU en Puissances .1 Tableau NfpaGuide Présent LE Dans Décrits Modèles Introduction I ChapitreGuide DU Utilisation ’ÉQUIPEMENT DE UtilisationCarbone de monoxyde au Empoisonnement Matières DES TableGarde EN Mise AvertissementsGAZ AU Alimenté Infrarouge À Telier D’ Teur Radi a GAZ DE Odeur D’UNE Présence EN

MH25LP / MH25NG specifications

The Mr. Heater MH25LP and MH25NG portable heaters are designed for anyone looking to efficiently heat small to medium-sized spaces, whether indoors or outdoors. These heaters are known for their reliability and effectiveness, making them popular choices for residential use, outdoor activities, and emergency heating scenarios.

The MH25LP is the propane model, while the MH25NG utilizes natural gas, providing versatility in fuel options to cater to different preferences and availability. Each unit is fitted with essential safety features, including an oxygen depletion sensor and an accidental tip-over shutdown system, ensuring peace of mind during use.

One of the main features of the Mr. Heater MH25 series is its impressive heating capacity. The units can produce up to 25,000 BTU per hour, sufficient for heating spaces up to 600 square feet, making them ideal for workshops, garages, cabins, and various outdoor activities. The adjustable heat settings allow users to customize the temperature to suit their comfort level, maximizing efficiency and reducing fuel consumption.

The design of the MH25 heaters emphasizes user convenience. Both models are lightweight and portable, which allows for easy transportation from one location to another. They come equipped with comfortable carrying handles, enhancing their usability for outdoor events, camping trips, or simply moving from room to room.

Another significant feature of the Mr. Heater MH25 series is the sophisticated combustion technology employed. The heaters utilize a radiant heating system that effectively warms objects and people in the room rather than just the air, leading to faster heating times and a more comfortable environment. Additionally, the units are designed with a sturdy and durable construction that ensures longevity, withstanding the rigors of outdoor use.

The units are also designed to operate quietly, making them an excellent choice for environments where noise levels need to be kept to a minimum, such as in personal workshops or while camping.

Overall, the Mr. Heater MH25LP and MH25NG are powerful, safe, and portable heating solutions that provide reliable warmth and comfort in various settings. Their combination of efficient heating, portable design, and safety features makes them an essential tool for anyone needing reliable heating solutions. Whether for everyday use or special events, these heaters stand out as dependable options to keep warm.
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