Appendix G
Quick Reference Information
LOW-HEAT PRESSURE SWITCH LPS SETTINGS
MODEL NO.
FACTORY SETTINGS
HIGH-ALTITUDE SETTINGS
Make Point
Break Point
Make Point
Break Point
330AAV
330JAV
333BAV
0.37 in. wc
0.22
±
0.05 in. wc
(YELLOW LABEL)
0.35 in. wc
0.20
±
0.05 in. wc
(GRAY LABEL)
331AAV
0.37 in. wc
0.22
±
0.05 in. wc
(BLUE LABEL)
0.35 in. wc
0.20
±
0.05 in. wc
(RED LABEL)
333BAV
0.42 in. wc
0.27
±
0.05 in. wc
(ORANGE LABEL)
0.35 in. wc
0.20
±
0.05 in. wc
(LT. GREEN LABEL)
HIGH-HEAT PRESSURE SWITCH HPS SETTINGS
MODEL NO.
FACTORY SETTINGS
HIGH-ALTITUDE SETTINGS
Make Point
Break Point
Make Point
Break Point
330AAV
330JAV
333JAV
0.58 in. wc
0.43
±
0.05 in. wc
(YELLOW LABEL)
0.54 in. wc
0.39
±
0.05 in. wc
(GRAY LABEL)
331AAV
0.67 in. wc
0.52
±
0.05 in. wc
(BLUE LABEL)
0.62 in. wc
0.47
±
0.05 in. wc
(RED LABEL)
333BAV
0.68 in. wc
0.54
±
0.04 in. wc
(ORANGE LABEL)
0.58 in. wc
0.44
±
0.04 in. wc
(LT. GREEN LABEL)
FLAME SENSOR MICROAMPERAGE:
Microamp Range:
0.5 to 6.0 microamps
Typical Reading:
4.0 to 6.0 microamps
HOT SURFACE IGNITOR READING:
Ohm reading of HSI new cold:
40 to 90 ohms
(Resistance will go up with HSI life and exceed new HSI resistance over time.)
GAS VALVE OHM READINGS:
M to C:
98 ohms (solenoid coil)
Hi to C:
1.5 ohms (bridge rectifier, use diode test function setting on meter)
POWER CHOKE (INDUCTOR):
Run unit in cooling mode and measure motor amp draw before power choke. Then rerun unit in cooling mode, but this time measure amp draw
without power choke in line. The amp draw should be higher without power choke. Some ammeters will register a lower amp draw (look for a
change in amperage).
DRAFT SAFEGUARD SWITCH:
HH18HA215 (Manual Reset)
Break Point
215°F
±
6
FLAME ROLLOUT SWITCH:
HH18HA291 (Manual Reset)
Break Point
290°F
±
6
—42—
