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Honeywell Q539 Benutzerhandbuch

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Settings 
SUBBASE SETTING 
The subbase switching positions control the system 
operation as described below. 
SYSTEM SWITCH (some subbases do not have all of the 
following functions): 
COOL—cooling system is automatically controlled 
by the thermostat. Heating system is off. 
OFF—both the heating and cooling systems are off. If 
the fan switch is at AUTO position, the cooling fan 
is also off. 
HEAT—heating system is automatically controlled 
by the thermostat. Cooling system is off. 
FAN SWITCH: 
ON—fan operates continuously. 
AUTO—fan operates with cooling equipment as con­
trolled by the thermostat or with the heating equip­
ment as controlled by the plenum switch. 
To move the subbase switches to the desired control 
positions, use thumb and index finger to slide lever. Stop 
lever must stop over desired function indicator position for 
proper circuit operation. 
Fig. 4—Typical hookup for Q539H in heating­
cooling application with remote switching 
required to select heating or cooling and to 
provide automatic fan operation. 
Q539H/T87F INTERNAL SCHEMATIC 
T87F 
TEMP. 
FALL
R1 
ADJUST-
ABLE 
HEAT 
ANTICIPATOR 
FILTER 
LIGHT 
X 
W 
Y 
G 
R 
CLOGGED 
FILTER SWITCH 
OR COOLING 
PANEL 
CONNECTION 
HEATING 
RELAY OR 
VALVE 
COIL 
COOLING 
CONTACTOR 
COIL 
EXTERNAL 
SWITCHING 
FOR AUTO 
FAN 
FAN 
RELAY 
Z 
2 
1 
1 
X TERMINAL IS USED ON Q539 MODELS WITH 
FACTORY-INSTALLED MALFUNCTION LIGHT. 
W1 
Y1 
AUTO 
FAN 
ON 
HEAT 
COOL 
REMOTE 
SYSTEM 
SWITCH 
2 
POWER SUPPLY. PROVIDE DISCONNECT 
L2  L1 
MEANS AND OVERLOAD PROTECTION AS REQUIRED. 
(HOT) 
M8833 
Fig. 5—Typical hookup for Q539J in heating­
cooling applications. Fan relay operates 
automatically on heat or cool with fan in AUTO 
position 
Q539J/T87F INTERNAL SCHEMATIC 
HEAT 
OFF 
COOL  HEAT  OFF  COOL  AUTO 
FAN 
ON 
W 
B 
R 
G 
P 
T87F 
TEMP. 
FALL
R1 
ADJUST-
ABLE 
HEAT 
ANTICIPATOR 
FILTER 
LIGHT 
X 
Y 
CLOGGED 
FILTER SWITCH 
OR COOLING 
PANEL 
CONNECTION 
COMPRESSOR 
RELAY 
COOLING 
DAMPER 
MOTOR 
FAN 
RELAY 
O 
L1 
(HOT) 
L2 
3 
2 
1 
W1 
Y1 
ELECTRIC 
HEAT 
RELAY 
HEATING 
DAMPER 
MOTOR 
1 
2 
3 
X TERMINAL IS USED ON Q539 MODELS WITH FACTORY-
INSTALLED MALFUNCTION LIGHT. 
WITH NO O TERMONAL LOAD, THERMOSTAT CURRENT DURING 
HEATING CYCLE VARIES DEPENDING ON WHETHER FAN SWITCH 
IS IN THE ON OR AUTO POSITION. HEATER SHOULD BE SET FOR 
COMBINED CURRENT LEVEL OF HEAT RELAY AND FAN RELAY COILS. 
WITH O TERMINAL LOAD, SET THERMOSTAT HEAT ANTICIPATOR 
TO ITS MAXIMUM SETTING. (LIMIT THE THERMOSTAT HEATING 
LOAD CURRENT TO 0.8 AMPS TO ASSURE GOOD PERFORMANCE.) 
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD 
PROTECTION AS REQUIRED. 
M8834 
Checkout 
When installation is complete, turn on power supply and 
check system operation. 
HEATING 
Move the system switch on the Q539 to HEAT and the 
fan switch to AUTO. Move the heating setpoint dial to about 
6
AC (10AF) above room temperature. Heating equipment 
should start and the fan should run. Change the setpoint to 
about 6
AC (10AF) below the room temperature. The heating 
equipment and fan should shut off. 
NOTE: In heat pump applications, a minimum off-timer 
provides a five-minute time delay before starting com­
pressor when the thermostat last turned off the compres­
sor, or when the system first received power. This delay 
prevents compressor short cycling. 
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