Use and Care Manual

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2
TABLE OF CONTENTS
Important Safety Information ..............................................................................................................................3
Product Features................................................................................................................................................4
Preparing for Installation.....................................................................................................................................5
Air for Combustion & Ventilation.........................................................................................................................6
Installation ........................................................................................................................................................9
Operation .........................................................................................................................................................15
Care and Maintenance .................................................................................................................................19
Troubleshooting .................................................................................................................................20
Replacement Parts.............................................................................................................................22
WARNING: READ THE INSTALLATION & OPERATION INSTRUCTIONS BEFORE USING THIS APPLIANCE.
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this
heater. Improper use of this heater can cause serious injury or death from burns, re, explosion, and carbon
monoxide poisoning.
PRODUCT SPECIFICATIONS
TABLE OF CONTENTS
MODEL
MD300HGA MD300TGA
Gas Type Natural Only Propane/LP Only Natural Only Propane/LP Only
Input rating (BTU/Hr)
MAX. 30,000 28,000 30,000 28,000
MIN. 15,000 14,000 15,000 14,000
Ignition Electric Piezo Electric Piezo Electric Piezo Electric Piezo
Pressure
Regulator
Setting
4 in. W.C. 9 in. W.C. 4 in. W.C. 9 in. W.C.
Inlet Gas Pressure* (inches of water) *For purpose of input adjustment
Maximum 10.5 in. 14 in. 10.5 in. 14 in.
Minimum 5 in. 11 in. 5 in. 11 in.
Dimensions, Inches (H x W x D)
Heater 23 1/2 x 26 5/8 x 8 23 1/2 x 26 5/8 x 8 23 1/2 x 26 5/8 x 8 23 1/2 x 26 5/8 x 8
Carton 25 3/4 x 28 1/2 x 9 1/4 25 3/4 x 28 1/2 x 9 1/4 25 3/4 x 28 1/2 x 9 1/4 25 3/4 x 28 1/2 x 9 1/4
Weight (Pounds)
Heater 27.6 27.6 29.6 29.6
Shipping 32.6 32.6 34.6 34.6