kozy heat NCK-C39-D, Quick Start Manual, Page: 5 / 8

#NCK-C39-D
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HUSSONG MFG. CO., INC. KOZY HEAT FIREPLACES
EN
F. Test Inlet Pressure
IMPORTANT: For a proper pressure reading, apply the gas supply
pressure tests with all other gas appliances on or at full capacity in the
household.
Step 1: Loosen the inlet (IN) pressure tap screw (counterclockwise) on
the gas valve. See (A) in FIGURE 6.
Step 2: Attach a manometer to the inlet pressure tap with a 1/4” (6mm)
ID hose.
Step 3: Light the pilot and burner. Verify manometer reading is
between the recommended minimum and maximum pressure
settings. See TABLE 3 .
Step 4: Turn off pilot and burner.
Step 5: Disconnect hose and tighten the inlet pressure tap screw
(clockwise). The screw should be snug; do not over tighten.
Step 6: Relight the pilot and burner.
Step 7: Reattach the manometer to the inlet pressure tap to verify tap
is completely sealed. Manometer should read no pressure.
Table 3, Inlet Gas Supply Pressures
Fuel Minimum Maximum
Natural Gas 5” WC (1.25 kPa) 10” (2.49 kPa)
G. Test Manifold Pressures
Step 1: Loosen the manifold (OUT) pressure tap screw
(counterclockwise) on the gas valve. See (B) in
FIGURE 6.
Step 2: Attach a manometer to the outlet pressure tap with a 1/4” (6mm)
ID hose.
Step 3: Light the pilot and burner. Verify manometer reading is
between the recommended low and high pressure settings.
See
TABLE 4
.
Step 4: Turn off pilot and burner.
Step 5: Disconnect hose and tighten the outlet pressure tap screw
(clockwise). The screw should be snug; do not over tighten.
Step 6: Relight the pilot and burner.
Step 7: Reattach the manometer to the outlet pressure tap to verify tap
is completely sealed. Manometer should read no pressure.
Table 4, Manifold Gas Supply Pressures
Fuel Low High
Natural Gas
1.0” WC (0.24 kPa) 3.5” WC (0.87 kPa)
H. Verify Operation
Step 1: Light the pilot. Visually check the pilot flame to verify flame
envelops the top of the flame sensor and extends far enough
onto the burner for proper ignition. See FIGURE 7.
Step 2: To adjust the pilot flame, turn the pilot adjustment screw on the
gas valve clockwise to decrease flame, and counterclockwise to
increase flame.
Step 3: Turn the appliance off.
Step 4: Affix the gas type sticker on or near the gas valve.
Step 5: Reinstall the glass frame assembly and safety barrier.
Step 6: Light the pilot and burner. Visually check the main burner flame
appearance ( FIGURE 8 ) for proper ignition and operation of
the fireplace. Refer to the installation manual for complete
adjustment procedures.
Step 7: Complete and affix the ‘Gas Conversion’ labels as close to the
rating plate as possible.
Step 8: Verify the input rating of the converted appliance. See TABLE 5 .
Table 5, Input Ratings
Fuel Minimum Input Input
Natural Gas
20,000 (5.9 kW) 40,000 Btu/h (11.7 kW)
Inlet pressure tap
Manifold pressure tap
Burner ports
Pilot flame
Pilot
Lazy, yellow flames
Ideal Flame Appearance
FIGURE 6, Pressure Check Taps
FIGURE 7, Burner Ports Location and Correct Pilot Flame Appearance
FIGURE 8, Ideal Burner Flame Appearance