CHAPTER III

HEATER OPERATING

INSTRUCTIONS

NOTE

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

1. OPERATING SAFETY INSTRUCTIONS

2. HEATER STARTUP

WARNING: When used without fresh air, heater may

give off CARBON MONOXIDE, an odorless poison- ous 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. Open door for 5 minutes. If heater keeps shutting off, have it serviced. Keep burner and control clean.

WARNING: CARBON MONOXIDE POISONING MAY LEAD TO DEATH. Early signs of carbon monoxide poisoning resemble the flu with headache, dizziness and/or nausea. If you have these signs, heater may not be working properly. Get fresh air at once! Have heater serviced.

WARNING: DO NOT USE MATCH OR OTHER FLAME FOR LEAK TESTING.

WARNING: During heater startup ensure that building is well ventilated.

A.Open the gas supply valve or valves.

B.Set the thermostat to the OFF position. See Figure 8.

FIGURE 8. THERMOSTAT CONTROLS

CAUTION: If the infra-red color of the grid becomes

 

dull when the building furnace is operating, consult

C. If the manual gas control knob on the gas valve is

gas supplier on correct gas supply piping sizes.

not in the OFF position, partially depress the knob

CAUTION: This heater is for indoor installation only!

and rotate to the OFF position. See Figure 9.

 

PRESSURE

MANUAL GAS

REGULATOR

CONTROL KNOB

ADJUSTMENT

STANDARD

PRESSURE

REGULATOR

WRENCH

 

PILOT GAS OUTLET

BOSS

 

(PRESSURE TAPPING

 

 

DIRECTLY BENEATH)

 

GAS

 

 

INLET

 

 

PILOTSTAT

PILOT FLOW ADJUSTING SCREW

 

(BENEATH COVER SCREW)

 

POWER UNIT

 

 

Figure 9. Gas Valve Components

Model # MH25NG/LP

HS25NG/LP

10 Installation instructions and Owner’s Manual

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Mr. Heater MH25LP / MH25NG Chapter Heater Operating Instructions, Operating Safety Instructions Heater Startup, Pressure

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.