Bryant F Manuel d'utilisateur Page 59
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Noté. / 5. Basé sur avis des utilisateurs
59
5. Turn the DCV setpoint potentiometer CW until the
DCV LED turns off. The DCV LED should turn off
when the potentiometer is approximately 9--v. The
actuator should drive fully closed.
6. Turn the DCV and Exhaust potentiometers CCW until
the Exhaust LED turns on. The exhaust contacts will
close 30 to 120 seconds after the Exhaust LED turns
on.
7. Return EconoMi$er IV settings and wiring to normal
afte r completing troubleshooting.
DCV Minimum and Maximum
Position
To check the DCV minimum and maximum position:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Connect a 9--v battery to AQ (positive node) a nd AQ1
(negat ive node). The DCV LED should turn on. The
act uator should drive to between 90 and 95% open.
3. Turn the DCV Maximum Position potentiometer to
midpoint. The actuator should drive to between 20
and 80% open.
4. Turn the DCV Maximum Position potentiometer to
fully CCW. The actuator should drive fully closed.
5. Turn the Minimum Position potentiometer to
midpoint. The actuator should drive to between 20
and 80% open.
6. Turn the Minimum Position Potentiometer fully CW.
The actuator should drive fully open.
7. Remove the jumper from TR and N. The actuator
should drive fully closed.
8. Return EconoMi$er IV settings and wiring to normal
afte r completing troubleshooting.
Supply--Air Sensor
Input
To check supply--air sensor input:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Set the Enthalpy pote ntiometer to A. The Free Cool
LED turns on. The ac tuator should drive to between
20 and 80% open.
3. Remove the 5.6 kilo --ohm resistor and jumper T to
T1. The actuator should drive fully open.
4. Remove the jumper across T and T1. The actuator
should drive fully closed.
5. Return EconoMi$er IV settings and wiring to normal
afte r completing troubleshooting.
EconoMi$e r IV Troubleshooting
Completion
This procedure i s used to return the EconoMi$er IV to
operat ion. No troubleshooting or testing is done by
performing the following procedure.
1. Disconnect power at TR and TR1.
2. Set enthalpy potentiometer to previous setting.
3. Set DCV maximum position potentiometer to
previous setting.
4. Set minimum position, DCV setpoint, and e xhaust
potentiometers to previous settings.
5. Remove 620--ohm resistor from terminals SR and +.
6. Remove 1.2 kilo--ohm checkout resistor from
terminals SO and +. If used, reconnect sensor from
terminals SO and +.
7. Remove jumper from TR to N.
8. Remove jumper from TR to 1.
9. Remove 5.6 kilo--ohm resistor from T and T1.
Reconnect wires at T and T1.
10. Remove jumper from P to P1. Reconnect de vice at P
and P1.
11. Apply power (24 vac) to terminals TR and TR1.
WIRING DIAGRAMS
See Fig. 73 and 74 for typica l wiring diagrams.
580J
- NOMINAL 7.5 to 12.5 TONS 1
- UNIT ARRANGEMENT AND ACCESS 2
- Routine Maintenance 3
- Seasonal Maintenance 3
- SUPPLY FAN (BLOWER) SECTION 4
- Condenser Coil 6
- Evaporator Coil 6
- PURONR (R--410A) REFRIGERANT 8
- (Part No. EC39EZ067) 9
- COOLING CHARGING CHARTS 10
- 12.5 TON CIRCUIT 1 12
- 12.5 TON CIRCUIT 2 13
- 0.14 in +0.0/-0.03 15
- CONVENIENCE OUTLETS 16
- SMOKE DETECTORS 17
- Smoke Detector Locations 18
- Sampling Tube 19
- Return Air 19
- Sensor and Controller Tests 20
- FLASHES DESCRIPTION 21
- 2 25--- 50% dirty 21
- 3 51--- 75% dirty 21
- 4 76--- 99% dirty 21
- Detector Cleaning 22
- Test/reset 23
- PROTECTIVE DEVICES 24
- Control Circuit, 24--V 25
- Fuel Types and Pressures 25
- Flue Gas Passageways 26
- Combustion--Air Blower 26
- Burners and Igniters 27
- INTEGRATED GAS UNIT 28
- CONTROLLER (IGC) 28
- HOLE IN END PANEL (HIDDEN) 28
- 125,000/90,000 BTUH INPUT 29
- 180,000/120,000 BTUH INPUT 29
- 240,000/180,000 BTUH INPUT 29
- 250,000/200,000 BTUH INPUT 29
- Orifice Replacement 30
- Red LED-Status 31
- Table 11 – Orifice Sizes 32
- CONDENSER COIL SERVICE 35
- RTU--MP CONTROL SYSTEM 35
- EconoMi$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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