27
To configure this option while using a Navigator display:
Dual Switch — When Set Point Select (
Setpoint Select
,
SP.SE
) is configured to 4 (Dual Setp Sw), the unit’s active set
point is based on Cooling Set Point 1 (
Cooling Setpoint 1
,
CSP.1
) when the Dual Set Point switch contact is open and
Cooling Set Point 2 (
Cooling Setpoint 2
, CSP.2
) when it is
closed.
To configure this option while using a Touch Pilot display:
To change this value, a Control Point Force must be applied.
When configured correctly,
Setpoint Control
will indicate
Setp Sw.
To configure this option while using a Navigator display:
Chilled Water Fluid Type Selection —
The chilled
water fluid must be configured. The fluid type must be config-
ured to obtain the proper leaving water set point control range
and freeze protection. The Cooler Fluid Type (
Cooler Fluid
Type
, FLUD
) can be set to water or brine.
FRESH WATER — Configure the unit for Cooler Fluid Type
(
Cooler Fluid Type
, FLUD
) to water for units without brine or
glycol installed in the chilled water loop. The factory default
fluid type is fresh water. Use this option for fresh water sys-
tems. This will allow for a water temperature set point of 38 to
60 F (3.3 to 15.5 C). With water as the selection, the Freeze
Point is fixed at 34 F (1.1 C).
To configure this option with the Touch Pilot display:
To configure this option with the Navigator display:
BRINE OR GLYCOL OPERATION — Configure the unit
for Cooler Fluid Type (
Cooler Fluid Type
, FLUD
) to brine for
brine or glycol chilled water loops. This option will allow for a
set point temperature range of 14 to 60 F (–10.0 to 15.5 C).
Before configuring this selection, confirm that a suitable anti-
freeze has been added and is at a sufficient concentration to
protect the loop. Additionally, the Brine Freeze Set Point
(
Brine Freeze Setpoint
, LOSP
) must be set for proper freeze
protection operation. Set the Brine Freeze Set Point to the burst
protection provided by the glycol concentration. This value
will be Freeze Point for the fluid.
To configure this option with the Touch Pilot display:
To configure this option with the Navigator display:
ITEM ITEM EXPANSION
PATH
VALUE
SP.SE
Setpoint Select
Operating Modes
SLCT 4-20 mA Setp
DISPLAY NAME
PATH
LINE
NO.
VALUE
Setpoint Select
Status
GENUNIT
25
4 (Dual
Setpoint Switch)
ITEM
ITEM EXPANSION
PATH
VALUE
SP.SE
Setpoint Select
Operating Modes
SLCT
Dual
Setp Sw
DISPLAY
NAME
PATH
LINE
NO.
VALUE
Cooler
Fluid Type
Main Menu
Service
SERVICE1
1
1 = Water
ITEM
ITEM EXPANSION
PATH
VALUE
FLUD
Cooler Fluid Type
Configuration
SERV
Water
DISPLAY
NAME
PATH
LINE
NO.
VALUE
Cooler Fluid
Type
Main Menu
Service
SERVICE1
1
2 = Brine
Brine Freeze
Setpoint
Main Menu
Service
SERVICE1
3
Dependent on
fluid concentration
ITEM ITEM EXPANSION
PATH
VALUE
FLUD
Cooler Fluid Type
Configuration
SERV Brine
LOSP
Brine Freeze
Setpoint
Configuration
SERV
Dependent on
fluid concentration
Fig. 18 — 4 to 20 mA Set Point Control
0
10
20
3
0
40
50
60
70
8
0
90
10
12
14
16
1
8
20
mA
S
i
g
nal
S
et Point
Min LWT, Cooler Fl
u
id Type = 1, FLUD=Brine
Min LWT, Cooler Fl
u
id Type = 1, FLUD=W
a
ter
0
2
4
6
8
M
a
x LWT
A30-4830
