Johnson Controls HICM008B21S User Manual

(Main Parts)
MAINTENANCE
4-24
SM-18003
4.4.3.3 Thermistor
(1) PositionofThermistor
(2) ThermistorforIndoorSuctionAir
Temperature(ForRoomTemperature
Control)
 Theroomtemperatureiscontrolledbythe
thermistorforindoorsuctionairtemperature
detectingthetemperatureatthesuctionair
inlet of the indoor unit.
Thesettingtemperatureisindicatedon
theL.C.D.ofthewiredcontrollerswitchby
number.
Adjustthesettingtemperatureforprevention
fromexcessivecoolingandheating.
Itisrecommendedtosetthetemperatureas
follows;
EconomicalCoolingOperation:81
o
F(27
o
C)to84
o
F (29
o
C)/EconomicalHeatingOperation:64
o
F
(18
o
C)to68
o
F (20
o
C)
Theresistancecharacteristicsofthermistorisshownintheabovegure.
ATTENTION:
Thethermo-offvalueoftheindoorunitairinletthermistorissetatthetemperaturehigherthanthevalue
indicatedonthewiredcontrollerswitchby7
o
F (4
o
C)andthemaximumis86
o
F (30
o
C),becausethesuction
airtemperatureduringheatingoperationhasatendencytobecomehigherthanthatoftheoccupiedzone,
intendingcomfortableheatingoperation.
(3) ThermistorforIndoorDischargeAirTemperature(ForDischargeAirTemperatureControl)
 Thethermistorforindoordischargeairtemperatureisutilizedforthecontrolofpreventionfromcoldair
dischargeinheatingoperation,etc.
Theresistancecharacteristicsofthermistorisshownintheabovegure.
(4) ThermistorforLiquidPipeTemperatureofIndoorHeatExchanger
Theresistancecharacteristicsofthermistorisshownintheabovegure.
(5) ThermistorforGasPipeTemperatureofIndoorHeatExchanger
Theevaporatingtemperatureinheatingoperationisdetected.
Theresistancecharacteristicsofthermistorisshownintheabovegure.
When the temperature of the heat exchanger is below 32
o
F (0
o
C),
thermostat is turned OFF automatically and over 57
o
F (14
o
C),
thermostat is turned ON again.
Prevention from freezing
onto the heat exchanger in
COOL and DRY operation.
When the temperature of the heat exchanger is below 32
o
F (0
o
C),
thermostat is turned OFF automatically and over 57
o
F (14
o
C),
thermostat is turned ON again.
Prevention from freezing
onto the heat exchanger in
COOL and DRY operation.
0
10
20
30
40
50
60
70
80
5
(-15)
14
(-10)
23
(-5)
0
(0)
41
(5)
50
(10)
59
(15)
68
(20)
77
(25)
86
(30)
95
(35)
104
(40)
113
(45)
122
(50)
131
(55)
140
(60)
82
61
46
35
27
20.5
16
12.5
10
8
5.3
3.6
2.5
90
Ambient Temperature (
o
C)
Thermistor
Resistance
Thermistor Characteristics
●MiniCassette
Inlet Air Thermistor
(THM1)
Outlet Air Thermistor
(THM2)
Liquid Pipe Thermistor
(Freeze Protection)
(THM3)
Gas Pipe Thermistor
(THM5)

Johnson Controls HICM008B21S Specifications

General

Brand	Johnson Controls
Model	HICM008B21S
Category	Air Conditioner
Language	English