CHAPTER IV

OPERATOR MAINTENANCE

INSTRUCTIONS

1. TROUBLESHOOTING

A.Table 4 lists the common malfunctions which you may find during the operation or maintenance of your heater.

PROPER FLAME

ADJUSTMENT 3/8 TO 1/2 INCH (10-13 MILLIMETERS)

THERMOCOUPLE

B.For additional information, refer to Honeywell Field Bulletin enclosed in the heater carton.

C.In the event results cannot be obtained after performing all listed solutions, call the factory.

2. ADJUSTING THE PILOT FLAME

The pilot flame should envelop 3/8 to 1/2 in. (10 to 13 mm) of the tip of the thermocouple or generator. Refer to Figure 11. To adjust:

Figure 11. Proper Flame Adjustment

A.Remove pilot adjustment cover screw. Refer to Figure 12.

B.Turn inner adjustment screw clockwise to

decrease or counterclockwise to increase pilot flame.

C.Always replace cover screw after adjustment and tighten firmly to ensure proper operation.

 

PRESSURE REGULATOR ADJUSTMENT

 

MANUAL GAS

(BENEATH COVER SCREW)

INSTALL LONG

 

CONTROL KNOB

 

SCREW IN

WRENCH

 

OUTSIDE CORNER

 

 

BOSS

 

 

 

STANDARD

 

 

PRESSURE

 

 

REGULATOR

 

 

(“A” MODEL)

 

GAS

STEP OPENING REGULATOR

(“C” MODEL)

INLET

 

 

PILOT GAS OUTLET

 

(PRESSURE TAPPING

 

DIRECTLY BENEATH)

PILOTSTAT POW-

PILOT FLOW ADJUSTING SCREW

ER UNIT

(BENEATH COVER SCREW)

Figure 12. Top View of Standard Capacity Gas Control

Model # MH25NG/LP

HS25NG/LP

E12

Installation instructions and Owner’s Manual

Page 12
Image 12
Mr. Heater MH25NG/LP, HS25NG/LP Chapter Operator Maintenance Instructions, Troubleshooting, Adjusting the Pilot Flame

HS25NG/LP, MH25NG/LP specifications

The Mr. Heater HS25NG/LP and MH25NG/LP are reliable and efficient heating solutions designed for both residential and commercial spaces. These powerful units deliver warmth and comfort, making them ideal for garages, workshops, and outdoor settings.

One of the standout features of the HS25NG and MH25NG is their versatility in fuel options. The HS25NG is designed to use natural gas, while the MH25NG operates on propane, providing flexibility based on user needs and availability. This adaptability allows users to select the most convenient and cost-effective energy source for their heating requirements.

Both models are equipped with a robust heat output, with the capability to deliver 25,000 BTUs per hour. This level of performance ensures quick heating even in larger spaces, establishing a comfortable environment in minimal time. The units also feature a wide heating area that can efficiently cover spaces up to 600 square feet, making them suited for various applications.

User safety and efficiency are paramount in the design of these heaters. The HS25NG and MH25NG come with an automatic shutoff system that activates if the unit tips over or detects any obstruction to airflow. Additionally, they are equipped with a built-in piezo ignition system, enabling easy and reliable lighting without the need for matches or an external ignition source.

The heaters also incorporate advanced technology to optimize performance. Their infrared heating design allows for direct and efficient warmth, minimizing energy loss and ensuring that heat is directed where it's needed most. This not only enhances efficiency but can also lead to reduced energy costs over time.

Both models are designed with portability in mind, featuring a lightweight construction and convenient carry handle, making it simple to move the unit from one location to another as needed. The durable construction ensures that they can withstand the rigors of frequent use, whether it be in a workshop or an outdoor gathering.

In summary, the Mr. Heater HS25NG/LP and MH25NG/LP are powerful, versatile, and reliable heating solutions that combine advanced technology with user-friendly features. With their strong heat output, safety features, and option for both natural gas and propane, these heaters are an excellent choice for those looking for efficient heating in any environment.