Step 6 - Install Accessories; Energy Management Module; Remote Enhanced Display; Low Ambient Temperature Operation - Carrier AquaForce 30XA Series Installation Instructions Manual

Step 6 — Install Accessories
A number of accessories are available to provide the following op-
tional features (for details, refer to the Controls and Troubleshoot-
ing guide shipped with the unit).

ENERGY MANAGEMENT MODULE

The energy management module is used for any of the following
types of temperature reset, demand limit and ice features:
• 4 to 20 mA inputs for cooling set point reset and capacity
limit (requires field-supplied 4 to 20 mA generator)
• 0 to 10 v output for percentage total capacity running
• 24 v discrete outputs for shutdown and running relays
• 10k space temperature input
Discrete inputs for occupancy override, demand limit switch 2
(step 1 demand limit is wired to the base board, requires field-sup-
plied dry contacts), remote lockout switch and ice done switch (re-
quires field-supplied dry contacts).
REMOTE ENHANCED DISPLAY (OR TOUCH PILOT™
DISPLAY)
For applications where remote monitoring of the equipment is
required; the remote enhanced display (or Touch Pilot display)
provides an indoor display, capable of monitoring any equip-
ment on the Carrier Comfort Network
is required.

LOW AMBIENT TEMPERATURE OPERATION

If outdoor ambient operating temperatures below 32 F (0° C) are
expected, refer to separate installation instructions for low- ambi-
ent operation using the low ambient temperature head pressure
control accessory.

MINIMUM LOAD ACCESSORY

Contact your local Carrier representative for more details if a min-
imum load accessory is required for a specific application. For in-
stallation details, refer to separate installation instructions supplied
with the accessory package.

UNIT SECURITY/PROTECTION ACCESSORIES

For applications with unique security and/or protection require-
ments, several options are available for unit protection. Security
grilles and hail guards are available. Contact a local Carrier repre-
sentative for more details. For installation details, refer to separate
installation instructions supplied with the accessory package.

COMMUNICATION ACCESSORIES

A number of communication options are available to meet any re-
quirement. Contact your local Carrier representative for more de-
tails. For installation details, refer to separate installation instruc-
tions supplied with the accessory package.
(CCN) bus. A CCN bus
®
158

PUMP VFD

Pumps may be ordered with a variable frequency drive (VFD) for
speed control.
SENSORLESS CONTROL (CLOSED LOOP) — ACTIVE
SETUP 1
The VFD provided with the pump from the factory is configured
for sensorless control. Default set points are entered for the unit
according to nominal tonnage of the unit. Table 12 shows the set-
tings from the factory. For details on operating the drive display,
see the pump installation and operation manual, and for more de-
tailed information on the drive, see IVS 102 Operating Instruc-
tions. These manuals are supplied in the control box of the chiller.
The following set points should be verified or modified for the ac-
tual installation.
Parameter 20-21 Setpoint, Hdesign, Ft-Wc
Parameter 22-89 Design Flow Setpoint, GPM
Parameter 22-87 Pressure at no-flow speed, Hmin, GPM (40% of
design flow)
When changing set points, ensure values are within the pump
curve for the pump provided with the unit.
Minimum speed for the pump is set at 50 Hz, Parameter 4-12.
This may be changed as long as the corresponding flow rate meets
the minimum flow requirement for the chiller.
REMOTE SENSOR (CLOSED LOOP) — ACTIVE SETUP 2
The drive may be set up to use a remote sensor instead of sensor-
less pump control. For a remote sensor control change Active Set-
up on the drive from 1 to 2, Parameter 0-10. The drive will read a
0-10vdc or a 0/4-20 mA signal from the sensor. Switch S2-01
must be set to Off (default setting) for 0-10 vdc or On for 0/4-20
mA. The switch is located behind the display. The cover must be
removed and the display will snap off to access this switch.
The set point is defined by Parameter 20-21, Setpoint 1. This is a
percentage of the maximum signal from the sensor. The default is
80%.
REMOTE CONTROLLER (OPEN LOOP) — ACTIVE
SETUP 3
Drive may be controlled by external sources. For a remote control
of the drive change Active Setup on the drive to 3, Parameter 0-10.
An input signal can used to control the drive speed. Input signal
may be 0-10 vdc or 0/4-20 mA. The setup is the same as a remote
sensor.
A BACnet card is also included with the drive. For BACnet, use
Setup 3. The communication settings are in section 8 of the drive
parameters. See drive manual for details.