kozy heat NCK-SL42-SPB, Manual, Page: 3 / 6

EN
3
Conversion Kit Components
(1) Gas Conversion Label
(1) 50% Turndown Stepper Motor
(1) Gas Label
(1) Pilot Injector NG: #.023N
(3) Burner Orifices NG: #37 CENTER #54 SIDES
High Altitude Conversions
For high altitude installations in the United States, refer to the
American Gas Association guidelines for the gas designed
appliances derating method. For elevations above 2,000 ft
(610 m), input ratings are to be reduced by 4% for each 1,000
ft (305 m) above sea level.
When the appliance is installed at elevations above 4,500 ft
(1,372 m), the certified high altitude rating shall be reduced at
the rate of 4% for each additional 1,000 ft (305 m). Refer also
to CSA-B149.1 Natural Gas and Propane Installation Code,
local authorities, or codes which have jurisdiction in your area
regarding the derate guidelines.
CAUTION: The gas supply shall be shut off prior to
disconnecting the electrical power, before proceeding with
the conversion.
A. Prepare the Fireplace
Step 1: Remove the safety barrier and glass frame assembly.
Step 2: Remove glass media and media dam.
Step 3: Remove burner cover from firebox (10) screws.
Refer to the installation manual for more information.
B. Replace Burner Orifices
Step 1: Use a
7/16
” wrench to remove (2) ¼” flange nuts securing
side burner tubes. Remove the side burner tubes from
mounting cradles.
Step 2: Remove the center burner tube from its mounting
cradles.
Step 3: Remove existing orifice caps.
Step 4: Replace with the orifice caps included with this kit.
Tighten caps securely. The sizes are stamped on the
orifices.
Table 1, Burner Orifice Sizes at Elevations 0-4,500 ft (1,372 m)
Fuel Center Burner Side Burners
NG #37 (DMS) #54 (DMS)
Figure 1, Burner Orifice
BURNER
ORIFICE
C. Convert Pilot Assembly
Step 1: Using a
7/16
” wrench, loosen the pilot nut by turning
counterclockwise.
Step 2: Remove the pilot hood by pulling it up from the top.
Remove pilot orifice.
Step 3: Install new pilot orifice included with the kit (number
stamped on pilot orifices).
Step 4: Reattach pilot nut and tighten using
7/16
” wrench. Fitting
should be snug. DO NOT OVER-TIGHTEN!
D. Convert Gas Control Valve
Follow the stepper motor pressure regulator instruction sheet
included with this conversion kit to convert the gas valve.
E. Complete the Conversion
Step 1: Adjust the venturi. Loosen the screw, then adjust the
cap to the correct setting. Re-tighten the screw. See
Table 2.
Step 2: Remove and discard the (3) burner venturi covers.
Step 3: Reinstall media dam for natural gas placement. See
Figure 4 on page 4.
Step 4: Reinstall all other components previously removed.
Refer to the installation manual for more information.
Step 5: Turn the manual valve counterclockwise to the ON
position.
Step 6: Reconnect electrical power.
Step 7: Check for leaks at all connections with soapy water.
CENTER BURNER VENTURI
SIDE BURNER VENTURIS
Figure 3, Burner Venturi
Figure 2, Converted Pilot and Pilot Injectors