Save this manual for future reference. Owner’s operation and installation manual vent-free natural gas mini-hearth ® heater vmh3000tn 15,000 to 30,000 btu/hr with thermostat warning: if the information in this manual is not followed exactly, a fire or explosion may result causing property damage, pe...
2 104431 natural gas residential heaters ® local codes install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of the national fuel gas code ans z223.1, also known as nfpa 54*. *available from: american national standards institute, inc. 1430 b...
3 104431 owner’s manual product features safety device this heater has a pilot with an oxygen depletion sensing (ods) safety shutoff system. The ods/pilot is a required feature for vent-free room heaters. The ods/pilot shuts off the heater if there is not enough fresh air. Piezo ignition system this...
4 104431 natural gas residential heaters ® truss-head screw nut front panel figure 5 - attaching brass front trim to front panel brass front trim figure 4 - assembling heater side brass trim top brass trim slot mitered edge slot set screws adjusting plate screws assembled brass trim shim assembling ...
5 104431 owner’s manual today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heati...
6 104431 natural gas residential heaters ® determining fresh-air flow for heater location determining if you have a confined or unconfined space use this worksheet to determine if you have a confined or unconfined space. Space: includes the room in which you will install heater plus any adjoining ro...
7 104431 owner’s manual ventilation air ventilation air from inside building this fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must pro- vide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on th...
8 104431 natural gas residential heaters ® 36" 5" floor ceiling minimum minimum to top surface of carpeting, tile or other combustible material 6" minimum from sides of heater left side right side figure 10 - mounting clearances as viewed from front of heater caution: if you install the heater in a ...
9 104431 owner’s manual thermostat sensing bulb clamp thermostat sensing bulb the thermostat sensing bulb has been placed inside the heater for protection during shipping. Locating thermostat sensing bulb 1. Remove front panel of heater (see fig- ure 2, page 3). 2. Locate thermostat sensing bulb jus...
10 104431 natural gas residential heaters ® installation continued figure 14 - folding anchor figure 15 - popping open anchor wings for thin walls figure 16 - mounting heater onto mount- ing bracket horizontal slots mounting bracket (attached to wall) stand-out tab installing bottom mounting screws ...
11 104431 owner’s manual installation continued continued figure 18 - attaching heater to hearth base figure 19- placing hearth insert on heater base and attaching brass base trim mounting heater to optional hearth base 1. Lay heater on its back on a table with the bottom of heater overhanging the e...
12 104431 natural gas residential heaters ® installation continued c. Mounting heater to optional mantel see instructions included with mantel kit. Assembling mantel important: only use the optional man- tels specified in this manual. See accesso- ries, page 23 for proper mantel kits. This heater is...
13 104431 owner’s manual pressure testing gas supply piping system test pressures in excess of 1/2 psig (3.5 kpa) 1. Disconnect appliance with its appliance main gas valve (control valve) and equip- ment shutoff valve from gas supply pip- ing system. Pressures in excess of 1/2 psig will damage heate...
14 104431 natural gas residential heaters ® operating heater to turn off gas to appliance pilot burner thermocouple figure 24 - pilot 7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. • if control knob does not pop up when released, contact ...
15 104431 owner’s manual operating heater continued thermostat control operation the thermostatic control used on this heater differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. The thermostat adju...
16 104431 natural gas residential heaters ® troubleshooting warning: turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater. Remedy 1. Replace ignitor 2. Replace ignitor 3. Reconnect ignitor cable 4. Free ignitor cable if pinche...
17 104431 owner’s manual remedy 1. Clean burner (see cleaning and mainte- nance, page 19) or replace burner orifice 2. Replace burner orifice 3. Contact local natural gas company 1. Contact local natural gas company 2. Clean burner (see cleaning and mainte- nance, page 19) or replace burner orifice ...
18 104431 natural gas residential heaters ® troubleshooting continued warning: if you smell gas • shut off gas supply. • do not try to light any appliance. • do not touch any electrical switch; do not use any phone in your building. • immediately call your gas supplier from a neighbor’s phone. Follo...
19 104431 owner’s manual cleaning and maintenance cabinet air passageways • use a vacuum cleaner or pressurized air to clean. Exterior • use a soft cloth dampened with a mild soap and water mixture. Wipe the cabi- net to remove dust. Caution: you must keep control areas, burner, and circu- lating ai...
20 104431 natural gas residential heaters ® 12-1 12-2 illustrated parts breakdown vmh3000tn 1 2 9 10 10 11 12 13 14 15 17 19 20 23 24 25 8 6 6 21 7 1 3 5 16 18 4 22 26 1.
21 104431 owner’s manual parts list vmh3000tn this list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under replacement parts on page 19 of this manual. Key vmh3000tn no. Part no. Description qty. 1 098304-01 screw, #10 x 3/8" 6 2 100566-01ck fro...
22 104431 natural gas residential heaters ® technical service you may have further questions about in- stallation, operation, or trouble shooting. If so, contact desa international’s techni- cal service department at 1-800-323-5190. You can also visit desa international’s technical service web site ...
23 104431 owner’s manual premier mantel unfinished - gm903u series finished - gm902f series white lacquer finish - gm904w (differs slightly from illustration) for use with heater. Features a built-in base. Sturdy hardwood construction with classic styling and attractive molding. Available in a walnu...
Keep this warranty warranty information model ________________________________ serial no. _____________________________ date purchased ________________________ always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time ...