Design Technical Manual

Table Of Contents
AUXILIARY EQUIPMENT CONTROL BY ROOM TEMPERATURE
Auxiliary equipment control is switchable by room temperature. Auxiliary equipment switching is
performed for each room temperature divided to following 3 zones.
Tr
Ts +0.9°F (0.5 °C)
Ts -0.9°F (0.5 °C)
Ts
Zone C
Zone A
Zone B
Ts: Setting temperature
Tr: Room temperature
Zone Application
When temperature dropping When temperature rising
Primary Auxiliary Primary Auxiliary
A
Both of primary and auxiliary
equipment is unnecessary.
OFF OFF OFF OFF
B
Primary heater only.
When room temperature stays in
zone B for a long time, auxiliary
equipment also operates.
ON OFF*
1
C Auxiliary equipment also operates. ON ON*
2
ON ON*
2
*1: For standby time for auxiliary equipment operation, refer to indoor unit function number 71 of "FUNCTION
DETAILS" in Chapter 7. FUNCTION SETTING.
*2: When indoor unit function number 61 is set to "00", auxiliary equipment operates according to the following
conditions.
Ts - Tr > 21.6 °F (-12.0 °C): Auxiliary equipment turn off.
Ts - Tr > 18.0 °F (-10.0 °C): Auxiliary equipment turn on.
- (08 - 36) -
EXTERNAL INPUT
& OUTPUT
EXTERNAL INPUT
& OUTPUT