Bryant F Bedienungsanleitung Seite 53
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53
Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3 K thermistor
located at the inlet of the indoor fan. (See Fig. 65.) This
sensor is factory installed. The operating range of
temperature measurement is 0° to 158_F(--18_ to 70_C).
See Table 16 for sensor temperature/resistance values.
SUPPLY AIR
TEMPERATURE
SENSOR
MOUNTING
LOCATION
SUPPLY AIR
TEMPERATURE
SENSOR
C06033
Fig. 65 -- Supply Air Sensor Location
The temperature sensor looks like a n eyelet terminal with
wires running to it. The sensor is located in the “crimp
end” and is sealed from moisture.
Outdoor Air Lockout Sensor
The E conoMi$er IV i s equipped with an ambient
temperature l ockout switch located in the outdoor
airstream which is used to lock out the compressors below
a42_F(6_C) ambient temperature. (See Fig. 60.)
EconoMi$e r IV Control
Modes
IMPORTANT: The optional EconoMi$er2 doe s not
include a controller. The EconoMi$er2 is operated by a 4
to 20 mA signal from an existing field-supplied controller.
See Fig. 63 for wiring informat ion.
Determine the EconoMi$er IV control mode before set up
of the control. Some modes of operation may require
different sensors. (See Table 22.) The EconoMi$er IV is
supplied from the factory with a supply-ai r temperature
sensor and an outdoor-air temperature sensor. This allows
for operation of the EconoMi$er IV with outdoor air dry
bulb changeover control. Additional accessories can be
added to allow for different types of changeover control
and operation of the EconoMi$er IV and unit.
Outdoor Dry Bulb Changeover
The standard controller is shipped from the fac tory
configure d for outdoor dry bulb changeover control. The
outdoor air and supply air temperature sensors are
included as standard. For this control mode, the outdoor
temperature is compared to an adjustable setpoint selected
on the control. If the outdoor-air temperature is above the
setpoint, the EconoMi$er IV will adjust the outside ai r
dampers to minimum position. If the outdoor-air
temperature is below the setpoint, the position of the
outside air dampers will be controlled to provided free
cooling using outdoor air. When in this mode, the LED
next to the free cooling setpoint potentiometer will be on.
The changeover tempera ture setpoint is controlled by the
free c ooling setpoint potentiometer located on the control.
(See Fig. 66.)
The scale on the potentiometer is A, B, C, and D. See Fig.
63 for the corresponding temperature changeover values.
C06034
Fig. 66 -- EconoMi$er IV Controller Potentiometer
and LED Locations
LED ON
LED ON
LED ON
LED ON
LED OFF
19
18
LED OFF
LED OFF
LED OFF
17
16
15
14
13
12
11
10
9
40
45
50
55
60
65
70
75
80
85
90
95
100
DEGREES FAHRENHEIT
mA
D
C
B
A
C06035
Fig. 67 -- Outside Air Temperature Changeover
Setpoints
0
5
10
15
20
25
30
0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50
STATIC PRESSURE (in. wg)
FLOW IN CUBIC FEET PER MINUTE (cfm)
C06031
Fig. 68 -- Outdoor--Air Damper Leakage
580J
- NOMINAL 7.5 to 12.5 TONS 1
- UNIT ARRANGEMENT AND ACCESS 2
- Routine Maintenance 3
- Seasonal Maintenance 3
- SUPPLY FAN (BLOWER) SECTION 4
- Condenser Coil 6
- Evaporator Coil 6
- PURONR (R--410A) REFRIGERANT 8
- (Part No. EC39EZ067) 9
- COOLING CHARGING CHARTS 10
- 12.5 TON CIRCUIT 1 12
- 12.5 TON CIRCUIT 2 13
- 0.14 in +0.0/-0.03 15
- CONVENIENCE OUTLETS 16
- SMOKE DETECTORS 17
- Smoke Detector Locations 18
- Sampling Tube 19
- Return Air 19
- Sensor and Controller Tests 20
- FLASHES DESCRIPTION 21
- 2 25--- 50% dirty 21
- 3 51--- 75% dirty 21
- 4 76--- 99% dirty 21
- Detector Cleaning 22
- Test/reset 23
- PROTECTIVE DEVICES 24
- Control Circuit, 24--V 25
- Fuel Types and Pressures 25
- Flue Gas Passageways 26
- Combustion--Air Blower 26
- Burners and Igniters 27
- INTEGRATED GAS UNIT 28
- CONTROLLER (IGC) 28
- HOLE IN END PANEL (HIDDEN) 28
- 125,000/90,000 BTUH INPUT 29
- 180,000/120,000 BTUH INPUT 29
- 240,000/180,000 BTUH INPUT 29
- 250,000/200,000 BTUH INPUT 29
- Orifice Replacement 30
- Red LED-Status 31
- Table 11 – Orifice Sizes 32
- CONDENSER COIL SERVICE 35
- RTU--MP CONTROL SYSTEM 35
- EconoMi$er 2 39
- Economizer Controls 40
- Connecting Discrete Inputs 42
- Power Exhaust (output) 43
- RTU-- MP Troubleshooting 44
- Table 17 – LEDs 45
- BACnet MS/TP 47
- ECONOMI$ER SYSTEMS 50
- EconoMi$er IV 52
- HIGH LIMIT 54
- RANGE CONFIGURATION (ppm) 55
- WIRING DIAGRAMS 59
- PRE--START-- UP 62
- START--UP, GENERAL 62
- START--UP, RTU--MP CONTROL 64
- the current 66
- OPERATING SEQUENCES 67
- Heating With EconoMi$er IV 68
- Demand Controlled Ventilation 68
- Supplemental Controls 68
- RTU--MP Sequence of Operation 68
- if unoccupied 70
- The indoor fan will be 70
- FASTENER TORQUE VALUES 71
- Model Number Nomenclature 72
- Serial Number Format 72
- APPENDIX II. PHYSICAL DATA 73
- APPENDIX III. FAN PERFORMANCE 75
- FAN PERFORMANCE (cont.) 76
- Pulley Adjustment 79
- ELECTRICAL INFORMATION 80
- Wiring Diagrams 82
- Catalog No.SM580J---02 83
- UNIT START-UP CHECKLIST 85
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