Instruction/ maintenance manual of the product MDVFST Desa
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Save this manual for future reference. DIRECT -VENT GAS FIREPLACE OWNER’S OPERA TION AND INST ALLA TION MANUAL ® MDVFST (See Thru) fireplace with manual variable blower, ON/OFF hand-held remote control, electrical junction box, gas flex line and equipment shutoff valve.
2 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® FRONT VIEW 30 (76cm) (Opening) 23 5 / 8 (60cm) 25 (64cm) RIGHT SIDE 22 5 / 8 (57cm) 43 1 / 8 (110cm) 32 (81cm) (Opening) 1 7 / 8 (5cm) 1 1 / 4 (3cm) BA CK.
3 106442 OWNER’S MANUAL To determine the safest and most efficient location for your appliance, consider the following guidelines: 1. The location must allow for proper clearances (see Clearances ). 2. Consider a location where heat output would not be affected by drafts, air con- ditioning ducts, windows, or doors.
4 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® FRAMING Once the final location has been determined, observing height clearances for vent termi- nation, you may construct framing using dimensions shown in Figure 6, depending on your installation.
5 106442 OWNER’S MANUAL LOCATION OF VENT TERMINATION When locating vent termination, it is important to observe the minimum clearances shown in Figure 10. You will avoid extra framing by positioning your fireplace against an already existing framing member.
6 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® WARNING: Read all instruc- tions completely and thoroughly before attempting installation. Fail- ure to do so could result in serious injury, property damage or loss of life.
7 106442 OWNER’S MANUAL INSTALLATION FOR HORIZONTAL TERMINATION 1. Determine the route your horizontal venting will take. Note: The location of the horizontal vent termination on the exterior wall must meet all local and national building codes and must not be easily blocked or obstructed.
8 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® UP UP VENTING INST ALLA TION Continued (Framing Detail) 10" (254mm) 10" (254mm) 7 1 / 2 " (190mm) V ent Opening Combustible W all V ent Opening Noncombustible W all Figure 14 - Vent Opening Requirements 3.
9 106442 OWNER’S MANUAL UP Continued VENTING INST ALLA TION Continued Figure 18 - Horizontal Termination Configuration for Rigid Venting Using One 90 ° Elbow Figure 19 - Horizontal Termination Using Flexible Venting (MD V GFK Kit Shown) Horizontal V enting V ertical (V) Horizontal (H) 49.
10 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® 4. Connect a section of pipe and extend up through the hole. Note: If an offset is needed to avoid ob- structions, you must support the vent pipe every 3 feet. Use wall straps for this pur- pose (see Figure 21).
11 106442 OWNER’S MANUAL VENTING INST ALLA TION Continued Continued Figure 23 - Cathedral Ceiling Support Box Installation Non-hardening Mastic under all edges of support box before nailing Figure 2.
12 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® V er tical V enting V = 40' max. Figure 28 - Vertical Rigid Venting Configuration With No Horizontal Run VENTING INST ALLA TION Continued V enting with T wo 9 0 ° Elbo ws V ertical (V 1 ) Horizontal (H) 5' min.
13 106442 OWNER’S MANUAL VENTING INST ALLA TION Continued HIGH ALTITUDE INSTALLATION Your Vanguard direct-vent fireplace has been CSA/AGA tested and approved for elevations from 0-2000 feet and CGA certi- fied for elevations from 0-4500 feet.
14 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® INST ALLA TION BLOWER ASSEMBLY NOTE: The blower is preinstalled in this fireplace. Verify blower assembly place- ment during installation.
15 106442 OWNER’S MANUAL Figure 34 - Wall Switch Wiring Diagram WIRELESS HAND-HELD REMOTE CONTROL (GHRC SERIES) INSTALLATION Note: If using the wireless hand-held re- mote control, the wall switch is no longer operational.
16 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® INST ALLA TION Continued GAS LINE HOOKUP Figure 39 - Typical Exterior Wall Gas Shut-Off Installation WARNING: Gas line hookup should be done by your gas sup- plier or a qualified service person. WARNING: Before you pro- ceed, make sure your gas supply is OFF.
17 106442 OWNER’S MANUAL Continued INST ALLA TION Continued INSTALLING LOG SET Open Close Figure 42 - Removing Glass Door GAS SUPPLY TESTING Note: This section is intended as a guide for qualified service technicians installing gas to the appliance.
18 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® INST ALLA TION Continued BURNER REMOVAL CAUTION: Before proceeding, make sure the entire unit is cool. 1. Remove the top and bottom louvers and screen. Open the glass door (left or right side). 2. Carefully remove the log set.
19 106442 OWNER’S MANUAL CAUTION: If the glass breaks, be cautious of fragments on the floor. Keep children away from the area. Do not operate the unit. Use proper safety gloves to re- move the broken glass door. Dis- card safely. A glass door kit can be ordered through your local distributor.
20 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® Thermocouple Incoming Main Gas Supply Piezo Ignitor Control V alve V ariable Speed Control Electrical Rating: 120v , 60Hz, 0.
21 106442 OWNER’S MANUAL INST ALLA TION INSTRUCTIONS FOR CONVERSION NA TURAL TO PROP ANE/LP BEFORE YOU BEGIN The conversion parts are packaged with the unit. Please check the contents before be- ginning this conversion. Make sure the gas control valve is in the OFF position and all electrical power to the appliance of OFF.
22 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® ADJUSTING AIR SHUTTER The air shutter, located at the underside of the main burner (see Figure 59 ), has been factory preset to the proper air-to-gas ratio which results in an even, clean burning flame across the burner (see Figure 60).
23 106442 OWNER’S MANUAL TROUBLESHOOTING OBSERVED PROBLEM Pilot will not light No gas to burner, although wall switch and valve are set to the ON position Frequent pilot outage Burner goes off after a short time When ignitor button is pressed, there is no spark at pilot Remote does not function POSSIBLE CAUSE 1.
24 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® TROUBLESHOOTING Continued POSSIBLE CAUSE 1 . Gas supply turned off or equipment shutoff valve closed 2. Control knob not in PILOT position 3. Control knob not pressed in while in PILOT position 4. Air in gas lines when installed 5 .
25 106442 OWNER’S MANUAL OBSERVED PROBLEM Glass soots Fireplace produces a clicking/ticking noise just after burners are lit or shut off REMEDY 1. Adjust the log set so that the flame does not excessively impinge on it 2. Inspect the opening at the base of the burner to see that it is NOT packed with any type of material 1.
26 106442 MDVFST DIRECT -VENT GAS FIREPLACE ® ACCESSORIES RECEIVER AND HAND-HELD ON/OFF REMOTE CONTROL KIT - GHRC For all models. Allows the gas log heater to be turned on and off by using a hand-held remote control.
27 106442 OWNER’S MANUAL PILOT ASSEMBLY Natural - 105883-01 (25701) Propane/LP - 105883-02 (25702) If in need of replacing, have a qualified technician replace it. GAS CONTROL VALVE Convertible Control 104496-03(14480) If in need of replacing, have a qualified technician replace it.
LIMITED WARRANTY DIRECT-VENT FIREPLACE DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.
An important point after buying a device Desa MDVFST (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Desa MDVFST yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Desa MDVFST - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa MDVFST you will learn all the available features of the product, as well as information on its operation. The information that you get Desa MDVFST will certainly help you make a decision on the purchase.
If you already are a holder of Desa MDVFST, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Desa MDVFST.
However, one of the most important roles played by the user manual is to help in solving problems with Desa MDVFST. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa MDVFST along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
