Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-50300236-01 Printed in U.S.A. Form 30-1ASI Pg 1 12-22 Replaces: 30-37SI
Installation Instructions
Part No. 00EFN900044000A, 00EFN900005600A
SAFETY CONSIDERATIONS
Installation of this accessory can be hazardous due to system pres-
sures, electrical components, and equipment location (such as a
roof or elevated structure).
Only trained, qualified installers and service mechanics should in-
stall, start up, and service this equipment.
When installing this accessory, observe precautions in the litera-
ture, labels attached to the equipment, and any other safety precau-
tions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling and installing this accessory.
PACKAGE CONTENTS
GENERAL
These instructions cover installation of the dual chiller thermistor
accessory. If two chillers are installed in parallel, additional chilled
water sensors (one for each chiller) must be installed in the com-
mon leaving water piping. The accessory kit contains the required
thermistors, wells, and wiring connectors. This accessory is not re-
quired for chillers piped in series.
INSTALLATION (00EFN900044000A)
To prepare the chillers for parallel operation, perform the follow-
ing procedure:
1. Lock out and tag all disconnects.
2. Determine the location for the thermistor wells. The well loca-
tions must be in the common leaving water header. See Fig 1.
DO NOT relocate the chiller’s leaving water thermistors. They
must remain in place for the unit to operate properly.
3. Install the thermistor wells. The thermistor well is a 1/4 in.
NPT fitting. See Fig. 2. Select a location that will allow for
removal of the thermistor without any restrictions. Installa-
tion method will depend on the type of piping.
4. Insert the thermistors into the wells until the O-rings on the
thermistors reach the well body. Use the nut on the thermis-
tors to secure the thermistors in place.
It is recommended that a small amount of heat compound
(such as Dow Corning 340 Heat Sink Compound) be inserted
with the thermistor for better heat transfer.
5. Once the thermistors are in place, it is recommended that a
wire loop be made and secured with a wire tie to the chilled
water pipe. This will provide strain relief. See Fig. 3.
6. The wiring connector (part no. HY06AM016) comes
attached to the thermistor lead. Run connector wiring to the
chiller control box of the master and slave chillers. Plug the
connectors into MBB-J6 CH-3 on the main base board for
30RB060-300, 30XA080-501 fixed speed and 30XW150-
400 units. See Fig. 4. For 30XV140-500 plug the connectors
into SIOB-B J-25 (AI-03). See Fig. 5. For 30RC065-152 plug
the connectors into SIOB-B J-25 (AI-01). See Fig. 5.
7. Restore power to unit.
NOTE: For 30RB315-300 units, as well as all units using the dual
chiller algorithm, a Carrier Comfort Network®(CCN) bus must be
connected between the two modules.
WARNING
Electrical shock can cause personal injury and death. Shut off
all power to this equipment during installation. There may be
more than one disconnect switch. Tag all disconnect locations
to alert others not to restore power until work is completed.
Table 1 — Package Contents (00EFN900044000A)a
a. Accessory 00EFN900044000A is used with 30RB060-300, 30RC065-152,
30XA080-501 fixed speed, 30XW150-400 and 30XV140-500 units. 30XA fixed
speed units are identified by a number in the 9th position of the model number;
for example, 30XAB2006-------.
ITEM PART NO. QUANTITY
Thermistor 00PPG000008106A 2
Well 00PPG000008000A 2
Connectorb
b. Connector comes wired to the thermistor.
HY06AM016 2
Table 2 — Package Contents (00EFN900005600A)a
a. Accessory 00EFN900044000A is used with 30RB060-300, 30RC065-152,
30XA080-501 fixed speed, 30XW150-400 and 30XV140-500 units. 30XA fixed
speed units are identified by a number in the 9th position of the model number;
for example, 30XAB2006-------.
ITEM PART NO. QUANTITY
Thermistor 00PPG000008106A 2
Well 00PPG000008000A 2
Connectorb
b. Connector comes wired to the thermistor.
HY84EE004 2
AUX 1 Board CEPLP130567-02-SA 2
CB4 HH83ZB010 2
Harness 00PPN500011200A 2
30RB060-300, 30XA Fixed Speed 080-501,
30XA Variable Speed 140-352, 30XW150-400,
30XV140-500, 30RC065-152
Dual Chiller Thermistor Accessory
