Mr. Heater F260590 OPERATING INSTRUCTIONS AND OWNER’S MANUAL

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Compact Unit / Utility Heater

Operating Instructions and Owner’s Manual

FUEL CONVERSION Section 3: RATE TAG CONVERSION INSTRUCTIONS

FIGURE 13

Step 13

Connect main electrical power, and turn main gas supply back on.

Turn up thermostat to call for heat. When the main burners light

using soapy water check all connections thoroughly for gas leaks.

Remembering to also check the pressure test plug replaced in step

12. Allow the heater to operate for at least 5 minutes, then observe

the main burner flame. A hard blue flame extending into the tube is

normal. Slight yellow tipping is acceptable. There is no air adjustment

to the burner.

Step 14

See figure 13. Remove the data tag for their respective gases. Remove

label and place over the existing portion of the tag. This tag is

preprinted with all the correct information for the converted heater.

Step 15

Remove the converted information tag from the kit and fill in the

information. Then place this tag below the updated rating tag on the

unit.

Step 16

Replace any panels and operate heater following all warnings/cautions

and instructions in the operator’s manual and labels.

Table 4

NATURAL GAS MANIFOLD PRESSURES - IN. W.C.. (KPA)

MHU 50/80/125

ALTITUDE FT. (M)

0-2000 (0-610) 2000-4500 (610-1370)

MHU 50/80/125 4.0”WC (0.99 KPA)* 3.6”WC (0.89 KPA)

*NO ADJUSTMENT REQUIRED

Table 5

LP/PROPANE GAS MANIFOLD PRESSURES - IN.W.C.. (KPA)

MHU 50/80/125

ALTITUDE FT. (M)

0-2000 (0-610) 2000-4500 (610-1370)

MHU 50/80/125 10”WC (2.49 KPA)* 8.5”WC (2.12KPA)

*NO ADJUSTMENT REQUIRED

Table 6

INLET PRESSURES:

Natural Gas

MAX - 14” WC (3.49 kPa)

MIN - 5”WC (1.25 kPa)

Propane

MAX - 14” WC (3.49 kPa)

MIN - 11”WC (2.74 kPa)

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Mr. Heater F260590 Big Maxx 125,000 BTU Dual-Fuel Forced Air Garage Heater

OPERATING INSTRUCTIONS AND OWNER’S MANUAL - Page 17