Vermont Casting DV580 - Manual (Page 43)

43
DV360/580 Series Direct Vent Gas Fireplace
20010667
unfastening the screw on the tray to the right side of
the orifice. Slide the bracket/gasket assembly over
the fitting on the manifold toward the back with the
gasket to the right. Secure the bracket/gasket as-
sembly using the screw removed earlier. (Fig. 67a)
5. Replace the orifices according to the table on Page
42.
6. Replace the mixing tube on the burner housing by
removing the two (2) screws that secure the mixing
tube to the burner housing assembly. Remove the
old gasket behind the mixing tube. (Fig. 68) NOTE:
The mixing tube for propane gas has only two
bimetallic springs that are in the closed position
at cold start. The mixing tube for natural gas has
two spring/shutter collar assemblies that are in
the closed position at cold start. Make sure the
correct mixing tube is used for conversion.
7. Use the new gasket supplied in the conversion kit
and proper mixing tube and replace in reverse order.
8. Reassemble the burner housing assembly, the
burner tube assembly and the fettle in reverse order.
DV580
1. Remove manifold mounting screw from burner. (Fig.
69)
2. Remove burner orifice from manifold assembly using
3/8” wrench. (Fig. 70)
3. Install conversion orifices in place of orifices just
removed.
4. Remove air shutters from burner pan by removing
shutter retaining screw then air shutter. (Fig. 71)
5. Replace only the rear air shutters.
Natural Gas: Rear air shutter, fully open.
Front air shutter, fully open.
LP: Rear air shutter, fully open.
Front air shutter, fully open.
6. Re-install manifold to burner pan.
Conversion to Natural Gas
Burner Orifice Input (BTU/hr)
Kit # Model Front Part # Rear Part # Minimum Maximum
20010751 DV360RP/RFP #53 20007347 #43 30000512 18,500 30,000
(.0595”) (.089”)
Conversion to LP
Burner Orifice Input (BTU/hr)
Kit # Model Front Part # Rear Part # Minimum Maximum
20010752 DV360RN/RFN #64 20010935 #54 20000130 17,000 30,000
20011025 DV360EN (.036”) (.055”)
Table 1 Injector Orifice Size Matrix
2. Remove pilot orifice with needlenose pliers. (Fig. 77)
3. Install conversion pilot orifice.
4. Reinstall pilot hood. Be sure to align pilot hood with
index marks.
CO105
Gas Conversion
Pilot
2/15/99 djt
Index
Marks
Pilot
Bracket
Pilot Hood
CO105
Fig. 76 Remove pilot hood.
CO106
Gas Conversion
Pilot2
2/15/99 djt
Pilot
Orifice
CO106
Fig. 77 Remove pilot orifice.
5. Turn the gas supply valve and gas valve on and test
for leaks. Use a 50/50 solution of liquid soap and
water to test for leaks at gas fittings and joints. Apply
water/soap solution with brush only - do not over ap-
ply. NEVER test with an open flame.
6. Follow procedure on rating plate to light the pilot.
Check for leaks.
7. Turn main burner on and check for leaks.
8. Install logs. Refer to Page 25 for proper log place-
ment.
Installation complete.
Pilot Orifice Conversion
NOTE: It is not necessary to remove the pilot tube for
conversion.
1. Loosen pilot hood turning counterclockwise using a
7/16” wrench. (Fig. 76)