Specifications

28
Heating Set Point Selection — Several options for
30XW chillers operating as heat machines exist for controlling
the Leaving Condenser Water Set Point and are configured by
the Set Point Select (Setpoint Select, SP.SE) variable. In addi-
tion, the Heat Cool Select (Heat/Cool Select, HC.SE) variable
also has a role in determining the set point of the machine. All
units are shipped from the factory with the Heat/Cool Select set
to 0.
All default set points are based on Leaving Water Control
(Entering Fluid Control, EWTO) set to No. Values must be
confirmed for the individual set points. Limits for the set points
are listed in the configurations noted below.
To configure these options for the Touch Pilot™ display, see
Table 24A. If the chiller will be run in the Local mode, change
the Heat/Cool Select to a value of 1. If desired, the Touch
Pilot™ display can be configured for remote mode operation.
For this mode, use the remote/off/enable switch for chiller op-
eration. This mode also requires that the heat/cool switch input
be wired. The chiller will be in cooling mode with an open
switch input and heating mode when this switch input is
closed.
To configure these options for the Navigator™ display, see
Table 24B.
The Setpoint Select configuration can be set to five different
control options: Set Point Occupancy, Set Point 1, Set Point 2,
4-20 mA Input, and Dual Switch.
Table 24A — Heating Set Point Selection
with Touch Pilot™ Display
Table 24B — Heating Set Point Selection
with Navigator™ Display
Heating Operation — Operation in a heating mode first
always requires that a cooling load exists. Provided a cooling
load exists, the chiller will then look to see if a heating load ex-
ists and start as required to maintain the desired heating set-
point(s). For optimum benefit it is desirable to give as much
cooling load to the chiller as possible to realize maximum sav-
ings potential. Chiller operation in heating is limited to 122 F
(50 C) as standard and up to 140 F (60 C) when high condens-
ing select parameter (highcond or H.CON) is set to Yes.
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:
CAUTION
The 30XW chiller operation in either high condensing or
heat machine modes require that field-supplied thermal
insulation be installed on compressor discharge lines, oil
lines, condenser external surfaces and optional minimum
load valve lines up to the solenoid valve body. Tubing and
heat exchanger surfaces will be hot and the insulation is
required to prevent burns from accidental contact.
DISPLAY NAME PATH
LINE
NO.
VALUE
Heating Setpoint 1 Setpoint 17
Range: 80 to 140 F
(26.7 to 60 C)
Default: 100 F (37.8 C)
Heating Setpoint 2 Setpoint 18
Range: 80 to 140 F
(26.7 to 60 C)
Default: 100 F (37.8 C)
PARAMETERS
SET POINT
CONFIGURATION
(Setpoint Select)
DUAL SET
POINT
INPUT
(SETP_SW)
TIME
SCHEDULE
2
ACTIVE SET POINT
0 (Auto)
— Occupied Heating Setpoint 1
— Unoccupied Heating Setpoint 2
1 (Setpt 1) — — Heating Setpoint 1
2 (Setpt 1) — — Heating Setpoint 2
3 (4-20 mA) — — 4 to 20 mA Input
4 (Setpt Sw)
Open — Heating Setpoint 1
Closed — Heating Setpoint 2
ITEM ITEM EXPANSION PATH VALUE
HSP.1 Heating Setpoint 1 Setpoints HEAT
Range: 80 to 140 F
(26.7 to 60 C)
Default: 100 F (37.8 C)
HSP.2 Heating Setpoint 2 Setpoints HEAT
Range: 80 to 140 F
(26.7 to 60 C)
Default: 100 F (37.8 C)
PARAMETERS
Control
Method
(OPER)
Heat/
Cool
Select
(HC.SE)
Setpoint
Select
(SP.SE)
Dual
Setpoint
Switch
(DUAL)
Setpoint
Occupied
(SP.OC)
ACTIVE
SET
POINT
LOCAL HEAT
Setpoint Occ — Occupied HSP.1
Setpoint Occ — Unoccupied HSP.2
Setpoint 1 — — HSP.1
Setpoint 2 — — HSP.2
4-20 mA Setp — — 4-20 mA
Dual Setp Sw Open — HSP.1
Dual Setp Sw Closed — HSP.2
CCN HEAT
— — Occupied HSP.1
— — Unoccupied HSP.2
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
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