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TDS93-56231 NG to LP Fuel Conversion Kit 

For Stowe 8323 

 

ATTENTION: THIS CONVERSION KIT MUST BE INSTALLED BY A QUALIFIED 

SERVICE AGENCY. 

 

 

 

 
 
This Liquid Propane (LP) fuel conversion kit is for use with the Hearthstone 
Stowe 8323 only.  This kit is suitable for installations at elevations up to 4500 
feet above sea level.  When converted for LP, it is not necessary to derate the 
Stowe 8323 at elevations above 2000 feet. 
 
 

Table – Settings and Specifications 
 

Specification 

NG 

LP 

INPUT RATING (Btu/hr) 0-2000 ft 

22,400 

22,400 

INPUT RATING (Btu/hr) 2000-4500 ft 

21000

 

22400

 

ORIFICE SIZE (DMS) 0-2000 ft 

43 

55 

ORIFICE SIZE (DMS) 2000-4500 ft 

44 

55 

MANIFOLD PRESSURE - LO SETTING (in.w.c./kPa)

 

1.2/0.30 

4.1/1.02 

MANIFOLD PRESSURE - HI SETTING (in.w.c./kPa)

 

3.4/0.85 

10.4/2.59 

INLET PRESSURE - MINIMUM (in.w.c./kPa) 

5.0/1.25

 

12.0/2.99 

INLET PRESSURE - MAXIMUM (in.w.c./kPa) 

11.0/2.74 

13.8/3.45 

MINIMUM INPUT RATING LO SETTING (Btu/hr) 

13,000 

14,000 

Summary of Contents for TDS93-56231

Page 1: ...ary to derate the Stowe 8323 at elevations above 2000 feet Table Settings and Specifications Specification NG LP INPUT RATING Btu hr 0 2000 ft 22 400 22 400 INPUT RATING Btu hr 2000 4500 ft 21000 2240...

Page 2: ...paint Figure 1 Orifices Marking Locations Convertible regulators are designed to deliver either of two fixed outlet pressures for Natural Gas NG or LP Gas To change from one gas to the other turn the...

Page 3: ...et two hex head screws front R and L corners and swing the front of the valve assembly down 7 With 5 32 hex wrench loosen and remove the existing low pressure NG screw by turning counter clockwise unt...

Page 4: ...igure 6 NG Low Pressure Screw Removal Figure 7 Press LP Orifice into Valve to Compress O ring Figure 8 Tighten LP Low Pressure Orifice To Switch Pilot to LP Operation Refer to Figures 9 12 The pilot a...

Page 5: ...ot Tower by pushing on the upturned edge by the NAT lettering until the upturned edge is flush with the Pilot Tower surface You will see the NG LP Pilot Gate protruding from the back edge of the Pilot...

Page 6: ...ition Checking for leaks To perform initial gas leak test 1 Check carefully for gas leaks immediately after the conversion has been performed Do this before attempting to operate the appliance or othe...

Page 7: ...Continuing beeps confirm that ignition is in progress Once pilot ignition is confirmed valve will open to allow gas flow to main burner After main burner ignition the handset will automatically go in...

Page 8: ...ent view the flame pattern with the valve output at its highest setting Allow unit to operate for 10 minutes to allow the flame pattern to stabilize then observe flame pattern and adjust as necessary...

Page 9: ...tment CAUTION ADJUSTING ROD IS HOT WARNING ONLY A QUALIFIED GAS TECHNICIAN SHOULD MAKE ADJUSTMENTS TO THE AIR SHUTTER The air shutter is adjustable while the stove is burning Loosen the set screw on t...

Page 10: ...the screw to lock in place Figure 19 Restrictor Indicator To verify input rate The approximate input rate of the converted Stowe may be checked as follows 1 Ensure that no other gas appliances are in...

Page 11: ...e main burner in operation on high 3 Turn pressure regulator adjustment screw see Figure 15 to set required burner pressure Pressure is increased by turning clockwise pressure regulator models or decr...

Page 12: ...at low pressure orifice is properly seated in valve Conversion label placement When fuel conversion is complete fill out and apply included marking labels to the appliance as shown Fill out all fields...

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