4–29
T-372
Cd30 In-Range Tolerance
The in-range tolerance will determine the temperature band around the setpoint
which will be designated as in-range.
For normal temperature control, control temperature is considered in range if it is
within setpoint in-range Tolerance. There are four possible values:
1 = +/- 0.5°C (+/-0.9°F)
2 = +/- 1.0°C (+/-1.8°F)
3 = +/- 1.5°C (+/-2.7°F)
4 = +/- 2.0°C (+/-3.6°F) - Factory Default
If the control temperature is in-range, the green IN-RANGE light is illuminated.
In-range tolerance shall be set to +/- 2.0°C upon activation of dehumidification or
Bulb Mode (Cd33, Cd35, Cd48).
When CCPC is actively controlling, in-range tolerance is not considered.
“-----” will be displayed whenever Dehumidification or Bulb Mode is enabled or
when CCPC with six hour re-activation is actively controlling.
“-----” will be displayed whenever Frozen Economy Mode is operating.
Cd31 Stagger Start Offset
Time (Seconds)
The stagger start offset time is the amount of time that the unit will delay at start-
up, thus allowing multiple units to stagger their control initiation when all units are
powered up together. The eight possible offset values are 0 (Factory Default), 3,
6, 9, 12, 15, 18 or 21 seconds.
Cd32 System Current Limit
(Amperes)
The current limit is the maximum current draw allowed on any phase at any time.
Limiting the unit’s current reduces the load on the main power supply. When
desirable, the limit can be lowered. Note, however, that capacity is also reduced.
The five values for 460 VAC operation are: 15, 17, 19, 21, or 23 amperes. The
factory default setting is 21 amperes.
Cd33 Humidity Setpoint
This is the value in percent to which the system will dehumidify. There are
configuration variables that determine whether dehumidification capabilities are
installed. In the Test Mode, the setpoint will be temporarily set to 1%, allowing the
test of dehumidification. After 5 minutes, the normal setpoint is restored. If the
unit is configured for dehumidification, then the entire setpoint range will apply to
dehumidification. If Pre-trip is initiated, this value will be set to “OFF”
automatically.
(Replaced by Cd48 interface if CnF50 Enhanced Bulb Mode Interface is active.)
Cd34 Economy Mode (On-
Off)
The current state of the Economy Mode option, “-----”, On, or Off. CnF22
determines whether Economy Mode offered. Economy Mode is a user selectable
mode of operation provided for power saving purposes.
Cd35 Bulb Mode
The current state of the Bulb Mode option, “-----”, nOr, or bULb.
(Replaced by Cd48 if CnF50, Enhanced Bulb Mode, is active.)
Bulb Mode is an extension of dehumidification control (Cd33). If dehumidification
(CnF04) is set to “Off,” Cd35 will display “Nor” and the user will be unable to
change it. CnF28 determines whether the Bulb Mode selection is offered.
After a dehumidification setpoint has been selected and entered for code Cd33,
the user may then change Cd35 to “bulb.” After Bulb Mode has been selected
and entered, the user may then utilize function codes Cd36 and Cd37 to make
the desired changes.
Table 4–8 Controller Function Codes (Continued)
Code Title
Description
