Cold Weather Modulator
- Using a vacuum pump with gauge, apply 16 in. Hg to motor side of modulator. Determine if modulator holds or leaks within the correct temperature range. See COLD WEATHER MODULATOR.
COLD WEATHER MODULATOR SPECIFICATIONS
| Modulator Color | Holds Vacuum @ °F (°C) | Leaks Vacuum @ °F (°C) |
|---|---|---|
| Black/Normally Open | 20 (-6.7°C) | 35 (2) |
| Blue/Normally Open | 40 (4) | 55 (13) |
| Green/Normally Open | 50 (10) | 76 (24) |
| Yellow/Normally Closed | 65 (19) | 50 (10) |