Operating instructions

69
Table 45 — 30XA Operating Modes
SECOND SETPOINT IN USE — This mode is checked for
when the unit is ON. The mode is active when Cooling Set-
point 2 (Cooling Setpoint 2, CSP.2) or Ice Setpoint (Cooling
Ice Setpoint, CSP.3) is in use. While in this mode, the Active
Setpoint (Current Setpoint, SETP) will show the CSP.2 or
CSP.3 value.
While in this mode, the unit will operate to the Cooling Set-
point 2 (CSP.2) or Ice Setpoint (CSP.3). The mode will termi-
nate when the Cooling Setpoint 2 (CSP.2) or Ice Setpoint
(CSP.3) is no longer in use.
RESET IN EFFECT — This mode is checked for when the
unit is ON. The mode will be active when Temperature Reset
(Cooling Reset Select, CRST) is enabled either by CRST=1
(Outside Air Temperature), CRST=2 (Return Water), CRST=3
(4-20 mA Input), or CRST=4 (Space Temperature) and reset is
active.
While in this mode, the Active Setpoint (Current Setpoint,
SETP) will be modified according to the programmed infor-
mation and will be displayed as the Control Point (Control
Point, CTPT). The mode will terminate when the Temperature
Reset is not modifying the active leaving water set point, caus-
ing SETP to be the same as CTPT.
DEMAND LIMIT ACTIVE — This mode is chacked for
when the unit is ON. The mode is active when Demand Limit
(Demand Limit Type Select, DMDC) is enabled either by
DMDC=1 (Switch), DMDC=2 (4-20 mA Input), or the Night
Time Low Sound Capacity Limit (Capacity Limit, LS.LT).
The Active Demand Limit Value (Active Demand Limit
Val, LIM) will display the current demand limit according to
the programmed information and the unit’s capacity will be re-
duced to the amount shown or lower. The mode will terminate
when the Demand Limit command has been removed.
RAMP LOADING ACTIVE — This mode is checked for
when the unit is ON. The mode is active when Ramp Loading
(Ramp Loading Select, RL.S) is enabled and the following
conditions are met:
1. The leaving water temperature is more than 4° F (2.2° C)
from the Control Point (
Control Point, CTPT), and
2. The rate of change of the leaving water temperature is
greater than the Cool Ramp Loading (Cooling Ramp
Loading, CRMP).
The control will limit the percent capacity increase until one
of the two conditions above are no longer met, then the mode
will terminate.
COOLER HEATER ACTIVE — This mode is checked for
whether the unit is ON or OFF. The mode is active when the
cooler heater is energized. The cooler heater is energized when
the Outdoor Air Temperature (External Temperature, OAT)
is less than the calculated value, (Freeze Setpoint + Cooler
Heater Delta T Setpoint [Cooler Heater Delta Spt, HTR] de-
fault – 2° F [1.1° C]) and either the Leaving Water Temperature
(Cooler Leaving Fluid, LWT) or the Entering Water Tempera-
ture (Cooler Entering Fluid, EWT) are less than or equal to
the Freeze Setpoint + Cooler Heater Delta T Setpoint (HTR).
The Freeze Setpoint is 34 F (1.1 C), for fresh water systems
(Cooler Fluid Type, FLUD=1). The Freeze Setpoint is Brine
Freeze Setpoint (Brine Freeze Setpoint, LOSP), for Medium
Temperature Brine systems (Cooler Fluid Type, FLUD=2).
When in this mode, the cooler heater will be energized. The
cooler heater will be deenergized when both the Entering Wa-
ter Temperature (EWT) and Leaving Water Temperature
(LWT) are above the Freeze Setpoint + Cooler Heater Delta T
Setpoint (HTR).
This mode is enabled for freeze protection. If the tempera-
tures are not as described above, check the accuracy of the out-
side air, entering and leaving water thermistors.
COOLER PUMPS ROTATION — This mode is checked for
whether the unit is ON or OFF. The mode is active when the
NAVIGATOR OPERATING
MODE NUMBER
NAVIGATOR EXPANSION TOUCH PILOT DISCRIPTION
TOUCH PILOT
LINE NUMBER
TOUCH PILOT
VALUE
01 Startup Delay in Effect Startup Delay in Effect 2 Yes/No
02 Second Setpoint in Use Second Setpoint in Use 3 Yes/No
03 Reset in Effect Reset in Effect 4 Yes/No
04 Demand Limit Active Demand Limit Active 5 Yes/No
05 Ramp Loading Active Ramp Loading Active 6 Yes/No
06 Cooler Heater Active Cooler Heater Active 7 Yes/No
07 Cooler Pumps Rotation Cooler Pumps Rotation 8 Yes/No
08 Pump Periodic Start Pump Periodic Start 9 Yes/No
09 Night Low Noise Active Night Low Noise Active 10 Yes/No
10 System Manager Active System Manager Active 11 Yes/No
11 Mast Slave Ctrl Active Mast Slave Active 12 Yes/No
12 Auto Changeover Active Auto Changeover Active 13 Yes/No
13 Free Cooling Active Free Cooling Active 14 Yes/No
14 Reclaim Active Reclaim Active 15 Yes/No
15 Electric Heat Active Electric Heat Active 16 Yes/No
16 Heating Low EWT Lockout Heating Low EWT Lockout 17 Yes/No
17 Condenser Pumps Rotation Condenser Pumps Rotation 18 Yes/No
18 Ice Mode in Effect Ice Mode in Effect 19 Yes/No
19 Defrost Active on Cir A Defrost Active on Cir A 20 Yes/No
20 Defrost Active on Cir B Defrost Active on Cir B 21 Yes/No
21 Low Suction Circuit A Low Suction Circuit A 22 Yes/No
22 Low Suction Circuit B Low Suction Circuit B 23 Yes/No
23 Low Suction Circuit C Low Suction Circuit C 24 Yes/No
24 High DGT Circuit A High DGT Circuit A 25 Yes/No
25 High DGT Circuit B High DGT Circuit B 26 Yes/No
26 High DGT Circuit C High DGT Circuit C 27 Yes/No
27 High Pres Override Cir A High Pres Override Cir A 28 Yes/No
28 High Pres Override Cir B High Pres Override Cir B 29 Yes/No
29 High Pres Override Cir C High Pres Override Cir C 30 Yes/No
30 Low Superheat Circuit A Low Superheat Circuit A 31 Yes/No
31 Low Superheat Circuit B Low Superheat Circuit B 32 Yes/No
32 Low Superheat Circuit C Low Superheat Circuit C 33 Yes/No