Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Thermostatic Air Cleaner: Testing and Inspection

1. Remove thermostat from control box.
2. Place thermostat in a pan of cold water.
3. Raise water temperature to 20°C (68°F). Thermostat should remain open.
4. Raise water temperature to 34°C (93°F). Thermostat should close.
5. If thermostat does not operate properly, replace it.