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23 

NORMAL OPERATING CHARACTERISTICS 

 

Each and every 

ALTERNA™ 

that leaves the factory is quality checked to ensure compliance with our

 

certification. This 

check includes an operational test to ensure both satisfactory combustion and proper operation. 

Each installation site for any vent free heater presents its own unique combustion environment. Specific factors such 

as weather tightness of the home, size of the room in which the heater is installed, central heating, ceiling fans, drafts, 

altitude, the size of the firebox, paint or soot inside the firebox, etc., all have an influence on the proper operation of 

any vent free gas heater. 

 

A  normally operating ALTERNA™ Gas Fire Set possess the following characteristics: 

 

• 

Clean burning combustion, which, after normal break in, will produce no soot or smoke.

 

• 

A full bodied, lively flame. The flame will be blue at the base and a combination of blue and yellow at the body and 

tips. 

 

 

 

 

 

 

• 

After initial break-in produce no odor other than the normal odors associated with the combustion of Natural or Pro-

pane gas and/or the environment in which the heater is operated.  

• 

Will produce water vapor (increase indoor humidity) which may be beneficial during the dry heating season. 

 

 

CUSTOMER RESPONSIBILITIES AND PERIODIC MAINTENANCE 

 

• 

Keep the area around the 

ALTERNA™ 

free and clear from debris. From time to time, visually check pilot and burner  

   flames for proper appearance (see section above for burner; see Page 20 Fig. 34 for Pilot). 

• 

Periodically examine and clean the venting system. Once every year, a qualified agency or certified chimney sweep 
should examine and clean the venting system of the solid fuel burning fireplace in which the  ALTERNA™ installed (if 
applicable). 

• 

The air shutter and burner must be free of lint and dirt for optimum performance. Air shutters which have been closed 
or are obstructed with debris will not allow sufficient combustion air into the burner.  Air shutters and burner ports 
(where flame comes out of the burner) should be periodically cleaned of debris.  Use compressed air and/or a soft 
bristle brush to clean burner ports and air shutter area.. 

Air  shutters should not be altered from factory settings

.  

 

WARNING: Failure to keep the burner primary air opening clean may result in sooting or property damage. 

 

 

• 

Keep air intake holes of ODS Pilot (see Page 20 Figure 34) clear of lint.  Over time lint will accumulate in these holes, 
and will eventually result in nuisance pilot outage or difficulty in lighting pilot.  Clean these holes annually with  
compressed air or a pipe cleaner.  

NOTE: Lint and dust in the Air Intake Holes is the #1 cause of nuisance pilot 

outage.

 

• 

Do not operate in a dirty firebox or in a previously used firebox which has not had all soot completely removed or 
chimney flue cleaned. Previously used fireboxes must have flue and stack professionally cleaned by a chimney 
sweep.  Additionally, firebox walls and damper must also be thoroughly cleaned of all burn residue and soot using a 
damp cloth, sponge or brush. 

• 

Do not operate this set with any burner objects other than the 

RASMUSSEN 

FireBalls, FireShapes or FireStones  

   specifically designed and approved for use with this Burner System. 

• 

Do not use with blower inserts or heat exchangers. 

• 

If used, glass doors must be wide open when burner is on. 

• 

Do not remove Rating Plate/Warning Tags. These tags serve you and any future user as an integral safety and    

   identification component of the 

ALTERNA™ 

gas log heater. 

Removing these tags voids the warranty.

 

• 

WARNING: 

 

Do not allow fans to blow directly into fireplace.  Avoid any drafts that alter burner flame patterns.

  

   Do not place blower inside area of firebox. Ceiling fans may create drafts that alter burner flame patterns. Sooting and  
   improper burning may occur. Sooting can settle on surfaces outside the fireplace. 

• 

During periods of heavy use, inspect frequently for evidence of sooting. If sooting is present, discontinue use until 
source of sooting is determined and corrected. 

• 

Maintain positioning of FireBalls, FireShapes or FireStones (Pages 9 thru 18)

 

at all times.  

• 

Occasionally, you may use a soft bristle brush or damp cloth to clean objects. 

 

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Blue and Yellow 

Summary of Contents for DF-AFB20-ME-N-B

Page 1: ...U S A www rasmussen biz THE GAS LOG COMPANY Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to...

Page 2: ...before use and at least annually by a professional service person More frequent cleaning may be required due to excessive lint from carpeting bedding material etc It is imperative that control compar...

Page 3: ...3 Wireless Remote Transmitter Devices For SE Models each sold separately A Wireless Hand Held ON OFF Remote SR 2R B Wireless Hand Held ON OFF Remote with Thermostat THR 2R C Wireless Wall Timer 30 60...

Page 4: ...rease the Actual Btu Hr used by the same amount You may also choose to operate your ALTERNA as a Vented Appliance instead See notes and warnings regarding vented installation on Page 7 Adequate Combus...

Page 5: ...plumbing electrical and gas lines and at other openings VENT FREE APPLICATIONS COMBUSTION AIR CALCULATIONS COMBUSTION AIR CALCULATIONS WORKSHEET 1 Room Width Length Height W x L x H Vol ft 1a 1a 1b 1...

Page 6: ...fireplace mantel or facing will not catch fire In most cases they should also be adequate to prevent any discoloration or warping due to heat However each and every decorative gas appli ance installa...

Page 7: ...or remove it completely WARNING CHECK FOR PROPER VENTING A properly sized unobstructed chimney will normally vent all products of combustion Any odor or smoke detected inside the room is an indication...

Page 8: ...and proper gas pressures 2 Seal threads of gas supply with pipe compound then thread 1 2 FIP x 3 8 Flared Elbow Figures 3 and 4A onto the Gas Supply Pipe Figures 3 and 4B and wrench tighten 3 Place Th...

Page 9: ...d row of 3 Full FireBalls on top of the first row with flat side resting against Flame Rod Figures 2A and B FIGURE 6 FIGURE 5 A B Second row with flat side resting against Flame Rod STEP THREE Repeat...

Page 10: ...o the next hole with the tapered end facing down Figure 8 Next place the Cube CU 44 into the third locator hole with the rear right corner resting on the edge of the burner allowing it to lean slightl...

Page 11: ...gure 11 Next place the Cube CU 44 into the third locator hole with the rear right corner resting on the edge of the burner allowing it to lean slightly forward into the locator hole Figure 12 Now plac...

Page 12: ...ightly forward into the locator hole Figure 15 The Fireball FB 4 will fit into the next hole with the tapered end facing down Figure 14 Last place the Cylinder CY 63 into the 1st hole on the right at...

Page 13: ...sponding locator hole Place each FireStone on the 2nd row on top of those on the first row with back side of each resting against Flame Rods see Figure 20 following page WARNING Failure to position th...

Page 14: ...8 Top View FIRESTONES PLACEMENT FOR DF AFS30 cont d Top Row The AFS30 should look like the illustration below when completed ST1 ST3 ST17 ST2 ST20 ST10 ST15 ST18 ST16 ST19 under ST20 ST1 ST3 ST17 ST2...

Page 15: ...ST2 Front View Front View Front View ST1 Top View Bottom Row ST3 ST17 ST2 ST1 ST2 ST3 ST1 ST17 ST3 ST17 ST2 ST1 ST2 ST3 ST1 ST17 FIGURE 22 Top View FIGURE 23 Top View When placing FireStones over eac...

Page 16: ...10 ST3 ST2 ST16 ST1 ST2 ST15 ST18 ST16 ST17 ST10 ST3 ST3 ST10 ST18 ST15 ST16 ST2 ST1 ST17 FIRESTONES PLACEMENT FOR DF AFS24 cont d WARNING Failure to position the parts in accordance with these diagra...

Page 17: ...injury ST17 ST2 Front View Front View ST1 Top View Bottom Row ST17 ST2 ST1 ST2 ST17 ST1 ST17 ST2 ST1 ST2 ST17 ST1 FIGURE 27 Top View FIGURE 28 Top View When placing FireStones over each locator hole c...

Page 18: ...0 should look like the illustrations below when completed ST15 Top View ST16 Front View ST18 Top View Top Row WARNING Failure to position the parts in accordance with these diagrams or failure to use...

Page 19: ...Begin by slowly pouring glass onto the surface of the Alterna being careful not to let any glass drop into the pilot thermocouple or burner areas Figures 31 and 33 Glass in either of these areas may...

Page 20: ...ace screen is closed when the appliance is operating NOTE Any beeping or unexpected shutdown may be the over temperature safety feature in the receiver If this happens move the receiver into a cooler...

Page 21: ...n Valve Knob to ON to light burner If burner fails to light or if pilot goes out repeat steps 1 through 4 5 Adjust the burner flame height by turning the EASY Safety Valve Knob clockwise to lower and...

Page 22: ...ine attaches to the pilot See page 13 Figures 23A and B STEP TWO PILOT ADJUSTMENT ALL MODELS STEP THREE BURNER OPERATION RE VARIABLE FLAME HEIGHT MODELS AND SE REMOTE READY FIGURE 39 FIGURE 37 Slide S...

Page 23: ...rner should be periodically cleaned of debris Use compressed air and or a soft bristle brush to clean burner ports and air shutter area Air shutters should not be altered from factory settings WARNING...

Page 24: ...d Make sure the gas pressure coming into the fireplace falls between the minimum and maximum pressures allowed with this gas set refer to the tables pages 5 and 6 Blocked ports low flame only Free the...

Page 25: ...f incidental or consequential damages so the above limitation or exclusion may not apply to you 3 The maximum liability of RASMUSSEN in connection with this limited warranty shall not in any case exce...

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