Johnson Controls LSWD, Руководство для стартапов

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JOHNSON CONTROLS
31
FORM 145.05-SU7
ISSUE DATE: 10/31/2019
Refer to the IOM (145.05-NOM7) for all Sequence of
Operations information.
It is recommended that you record the POST START-
UP DATA with as many compressors operating as
possible. However, you can turn off the manual reset
compressor overloads to decrease the number of op-
erating compressor if the technician is unable to keep
compressors running long enough to test as a result of
Supply Air Temperature decreasing.
Starting the unit in Cooling
Mode-Constant Volume:
1. The unit must have 24vac to the SD terminal.
Turning the OFF/AUTO/ON rocker switch to ON
provide this signal.
2. The unit must have 24vac to OCC terminal, the
Occupied Command is being communicated, or
the internal timeclock enabled and set to go oc-
cupied at a specific time.
3. The supply fan should start after the unit goes Oc-
cupied after a slight delay.
4. The supply fan starts and runs without duct static
control.
5. The unit mode under the STATUS key is OCCU-
PIED STANDBY.
6. For the economizer or compressors to become ac-
tive the unit must switch to the Occupied Cooling
mode under the STATUS key.
7. There must be a zone temperature hardwired or
communicated to the unit. This can be selected un-
der the PROGRAM key subsection UNIT DATA.
8. The zone temperature is compared to the Oc-
cupied Zone Cooling SETPOINT found under
SETPOINTS key subsection COOLING.
9. In order to enter Occupied Cooling the zone tem-
perature must be .5 degrees warmer than the Oc-
cupied Zone Cooling Setpoint.
10. The unit enters OCCUPIED COOLING LOW
mode.
11. If the zone temperature is 1.5 degrees above the
OCCUPIED COOLING ZONE SETPOINT, the
unit switches to OCCUPIED COOLING HIGH
mode.
SECTION 4 - POST START-UP DATA
12. The unit looks at current Supply Air Temperature
and compares that temperature to the 1st and 2nd
STAGE COOLING SETPOINTS.
13. If the unit is in OCCUPIED COOLING LOW
mode it references the 1st STAGE COOLING
SETPOINT for supply air temperature control.
14. If the unit is in OCCUPIED COOLING HIGH
mode it references the 2nd STAGE COOLING
SETPOINT for supply air temperature control.
15. The economizer or compressors operate maintain-
ing the 1st or 2nd STAGE COOLING SETPOINT
until the zone temperature falls below the OCCU-
PIED ZONE COOLING SETPOINTS.
16. The unit stays in the OCCUPIED mode, but
switches to OCCUPIED STANDBY until the
zone temperature increases again.
17. The Supply Fan continues to operate as long as
the unit shows OCCUPIED STANDBY.
Starting the unit in Cooling
Mode-Variable Air Volume (VAV)
1. The unit must have 24vac to the SD terminal.
Turning the OFF/AUTO/ON rocker switch to ON
provide this signal.
2. The unit must have 24vac to OCC terminal, the
Occupied Command is being communicated, or
the internal timeclock enabled and set to go oc-
cupied at a specific time.
3. The supply fan should start after the unit goes Oc-
cupied after a slight delay.
4. Verify that the duct static is reading correctly ver-
sus the Setpoint under the SUPPLY FAN key.
5. The unit mode under the STATUS key is OCCU-
PIED STANDBY.
6. The temperature of the return air is compared to
the RETURN AIR COOLING SETPOINT un-
der the SETPOINTS key subsection COOLING.
7. If the return air temperature is greater than the RE-
TURN AIR COOLING SETPOINT by .5 degrees
the unit mode switch to OCCUPIED COOLING.
8. The supply air temperature is compared to
the SAT LOW and HIGH SETPOINTS in the
SETPOINTS key subsection COOLING.