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부품번호 | ST9120U 기능 |
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기능 | Universal Electronic Fan Timers | ||
제조업체 | Honeywell | ||
로고 | |||
ST9120U
Universal Electronic Fan Timers
APPLICATION
The ST9120U Universal Electronic Fan Timers integrate
control of all combustion blower and circulating fan
operations in a gas warm air appliance. This control is
the central wiring point for most of the electrical
components in the furnace. The basic purposes of the
ST9120U are to monitor the thermostat for heat, cool and
fan demands, run the induced draft blower motor and run
a circulating fan (up to two speeds) as required. The
electronic fan timers also monitor limit switch strings and
energize separate ignition control systems through spst
pressure switches. The ST9120U can replace any
ST9101 or ST9120 listed in Table 2 below. The electronic
fan timers feature a field-adjustable heat fan-on delay, a
field-adjustable heat fan-off delay, a field-adjustable cool
fan-on delay and a fixed cool fan-off delay.
Electronic air cleaner (EAC) and humidifier (HUM)
convenience terminal connections are provided as an
option. Continuous low speed indoor air circulation is
also provided.
SPECIFICATIONS
Electrical Ratings:
Power Voltage Requirements: 18 to 30 Vac, 60 Hz.
Contact Ratings:
Combustion Blower:
1.5A full load, 10A locked rotor at 115 Vac.
0.75A full load, 5A locked rotor at 230 Vac.
(Reduce full load rating by humidifier [HUM] load.)
Circulating Fan:
Heat-Cool speed:
15A full load, 30A locked rotor at 115 Vac.
7.5A full load, 15A locked rotor at 230 Vac.
(Reduce full load rating by electronic air cleaner [EAC]
load.)
Continuous speed (optional):
8A full load, 16A locked rotor at 115 Vac.
4A full load, 8A locked rotor at 230 Vac.
EAC and HUM: 0.8A maximum combined load at 115
Vac.
Thermostat Load: 0.10A plus ignition system load.
INSTALLATION INSTRUCTIONS
On/Off Delay Settings:
Heat Speed:
Delay On: Field-adjustable, 30 or 60 seconds. Delay
timing starts when gas valve is energized.
Delay Off: Field-adjustable, 60, 100, 140 or 180 sec-
onds. Delay timing starts when gas valve is de-
energized.
Cool Speed:
Delay On: Field Adjustable, 4 or 30 seconds.
Delay Off: Fixed, 30 seconds.
Timing Tolerance: Larger of ±5% or ±2 seconds.
Post Purge Timing:
5 seconds.
Environmental Ratings:
Temperature: -40°F (-40°C) to +175°F (+79°C).
Humidity: 5 to 95 percent, noncondensing.
Approvals:
Underwriters Laboratories Inc. File No.: MP466.
Canadian Standards Association File No.: LR95329.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings and specifications given in the
instructions and on the product to make sure the
product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out the product
operation as provided in these instructions.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect power supply before wiring to prevent
electrical shock or equipment damage. More than
one disconnection can be required.
®
69-0644-1
ST9120U UNIVERSAL ELECTRONIC FAN TIMERS
HUMIDIFIER
AIR CLEANER 3
INDUCER MOTOR
FUSE
L1 (H)
L2 (N)
TO 115/230 VAC
POWER SUPPLY
115/230 VAC
TRANSFORMER
24 VAC
MV MV/PV PV
VR8204
COMBINATION
GAS CONTROL
S8600 INTERMITTENT
PILOT IGNITION MODULE
GND
MV MV/PV PV (BURNER)
24V
GND 24V
SPARK
STARTING
CAP
2
LO
ML
MH
HI
CIRCULATING
FAN
THERMOSTAT
WY G R
3 DI
HUM EAC
1 23 4
N
NEUTRAL
CX X
N N CIR
BLWR
12
1
LIMIT
CONTROL
ROLL-OUT
SWITCH
Z1 ST9120
Z2
DELAY
12
OFF
SPEED
UP C Y
4
CG Y WR
PRESSURE
SWITCH
COOLING
CONTACTOR
1 CONNECT ONLY IF CONTINUOUS SPEED IS AVAILABLE AND USED.
2 CONNECT ONLY IF CONTINUOUS SPEED IS NOT USED.
PILOT
BURNER
PILOT
BURNER
GROUND
3 CONNECT IF EAC AND HUM TERMINALS ARE AVAILABLE AND USED.
4 SOME MODELS USE MALE 1/4-INCH QUICK-CONNECTS INSTEAD OF SCREW TERMINALS FOR THERMOSTAT CONNECTIONS.
NOTE: = DENOTES STANDARD TERMINAL.
= DENOTES OPTIONAL TERMINAL.
DENOTES LINE VOLTAGE WIRING.
DENOTES LOW VOLTAGE WIRING.
M5605A
Fig. 1. Typical ST9120U wiring connections with S8600 Intermittent Pilot Ignition Module.
69-0644—1
4
4페이지 ST9120U UNIVERSAL ELECTRONIC FAN TIMERS
COMBUSTION
AIR BLOWER
AUX
VENT
MV
MV
GAS VALVE
ROLLOUT
PRESSURE
SWITCH
MAIN
LIMIT
WIRE HARNESS ADAPTER
P1
1 L2 WHITE
2 L2 WHITE
3 PS/MV DRIVE ORANGE
4 LIMIT RED
5 LIMIT RED
L1 BLACK
6
7 24V GND YELLOW
8 MV SENSE VIOLET
9
INDUCER BLUE
3
6
1
4 NC
2
5
N
TO 120 VAC
POWER SUPPLY
L
INTERLOCK
3 DI
HUM EAC
1 23 4
N
NEUTRAL
CX X
N N CIR
BLWR
12
1
Z1
Z2 ST9120
DELAY
12
OFF
SPEED
UP C Y
CW23
4
CG Y WR
120
VAC
24
VAC
TRANSFORMER
STARTER
CAP
LO
HL
HH
HI
CIRCULATING
FAN
THERMOSTAT
WY G R
M24001
Fig. 4. Typical ST9120U wiring connections with wire adapter for replacing ST9101.
7 69-0644—1
7페이지 | |||
구 성 | 총 12 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
ST9120U | Universal Electronic Fan Timers | Honeywell |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |