Save this manual for future reference. Owner’s operation and installation manual vent-free natural gas mini-hearth ® heater vmh3000tnsa 15,000 to 30,000 btu/hr with thermostat this appliance may be installed in an aftermarket*, permanently located, manufac- tured (mobile) home, where not prohibited ...
2 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com safety information 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*. *a...
3 107101 owner’s manual for more information, visit www.Desatech.Com 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...
4 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com truss-head screw nut front panel figure 4 - attaching brass front trim to front panel brass front trim figure 3 - assembling heater side brass trim top brass trim slot mitered edge slot set screws adjusting plate...
5 107101 owner’s manual for more information, visit www.Desatech.Com 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 c...
6 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com 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 ...
7 107101 owner’s manual for more information, visit www.Desatech.Com 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 ...
8 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com figure 9 - mounting clearances as viewed from front of heater caution: if you install the heater in a home garage • heater pilot and burner must be at least 18 inches above floor. • locate heater where moving ve-...
9 107101 owner’s manual for more information, visit www.Desatech.Com 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, p...
10 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com installation continued figure 12 - folding anchor figure 13 - popping open anchor wings for thin walls figure 14 - mounting heater onto mount- ing bracket horizontal slots mounting bracket (attached to wall) sta...
11 107101 owner’s manual for more information, visit www.Desatech.Com installation continued continued figure 16 - attaching heater to hearth base figure 17 - 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 tab...
12 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com 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, pa...
13 107101 owner’s manual for more information, visit www.Desatech.Com 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. Pres...
14 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com operating heater to turn off gas to appliance figure 22 - 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...
15 107101 owner’s manual for more information, visit www.Desatech.Com thermocouple thermocouple pilot burner pilot burner operating heater continued thermostat control operation the thermostatic control used on this heater differs from standard thermostats. Standard thermostats simply turn on and of...
16 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com 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 ...
17 107101 owner’s manual for more information, visit www.Desatech.Com 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 maint...
18 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com 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 you...
19 107101 owner’s manual for more information, visit www.Desatech.Com 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 kee...
20 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com illustrated parts breakdown vmh3000tnsa 1 2 9 10 10 12 13 14 15 17 19 20 23 24 25 6 26 6 7 1 1 3 1 28 5 16 18 4 22 1 1 1 21 11 8 27.
21 107101 owner’s manual for more information, visit www.Desatech.Com parts list vmh3000tnsa 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 vmh3000tnsa no. Part no. Description qty. ...
22 107101 natural gas residential heaters ® for more information, visit www.Desatech.Com 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 des...
23 107101 owner’s manual for more information, visit www.Desatech.Com 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...
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 ...