Fujitsu ASUH18LMAS Design & Technical Manual page 37

WARNING
• Design and install external heater appropriately with considering its protection.
• Inappropriate designing and installation of external heater may cause a fire by emitted heat from
the external heater.
• Fujitsu General Ltd. is not responsible for inappropriate designing or installation of external
heating device.
 Auxiliary heater control 1
Operation
Heater on
Heater off
• Temperature of heater on (Thon): Adjustable by function number 62 (Operating temperature
switching of external heaters).
• All control temperatures will shift by adjusting "Thon".
Tr-Ts ≥ -1.8°F
(-1°C)
Tr-Ts ≥ -18°F
(-10°C）
Example: When set temperature (Ts) is 72°F (22°C) (Factory setting),
• and room temperature (Tr) increases above 53.6°F (12°C), signal output is on.
• and room temperature (Tr) increases above 69.8°F (21°C), signal output is off.
• and room temperature (Tr) decreases below 66.2°F (19°C), signal output is on.
• and room temperature (Tr) decreases below 50°F (10°C), signal output is off.
 Auxiliary heater control 2
Operation
Heater on
Heater off
• Temperature of heater on (Thon): Adjustable by function number 62 (Operating temperature
switching of external heaters).
• All control temperatures will shift by adjusting "Thon".
Tr-Ts ≥ -1.8°F
(-1°C)
8-4. Details of function
Heater is on as shown in following diagram of heating temperature.
• Heater is off as shown in following diagram of heating temperature.
• Other than heating mode
• Error occurred
• Forced thermostat off
• Fan stop protection
Tr-Ts
Off
Tr-Ts (=Thon) < -5.4°F (-3°C)
On
Tr-Ts < -21.6°F (-12°C)
Off
Heater is on as shown in following diagram of heating temperature.
• Heater is off as shown in following diagram of heating temperature.
• Other than heating mode
• Error occurred
• Forced thermostat off
• Fan stop protection
Tr-Ts
Off
Tr-Ts (=Thon) < -5.4°F (-3°C)
On
Condition
Tr: Room temperature
Ts: Set temperature
Thon: Heater on temperature
Condition
Tr: Room temperature
Ts: Set temperature
Thon: Heater on temperature
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8. External input and output