Dual Chiller Control Option - Carrier 30RB060-390 Installation Instructions Manual

DUAL CHILLER CONTROL OPTION — If the dual chiller
algorithm is used and the machines are installed in parallel, an
additional chilled water sensor must be installed for each
chiller. For 30RB315-390 units, a factory-supplied thermistor
and well are shipped in the control box of each. Install the well
in the common leaving water header. See Fig 34. Do not relo-
cate the chiller's leaving water thermistors. They must remain
in place for the unit to operate properly.
For the non-modular units, an accessory kit, part no.
00EFN900044000A, is available. This kit includes all parts
necessary for dual chiller control.
The thermistor well is a 1
well in the piping. The piping must be drilled and tapped for
the well. Select a location that will allow for removal of the
thermistor without any restrictions. See Fig. 60 and 61.
30RB UNIT SIZE VOLTAGE
208/230, 380,
060,070
460, 575
208/230
080-120
380, 460, 575
208/230
130-190,
315A-390A,
315B-390B
380, 460, 575
208/230†
210, 225
380, 460, 575
208/230†
250-300
380, 460, 575
*Dual point connection is not available when non-fused disconnect
option is selected.
†Single point connection not available.
/ in. NPT fitting for securing the
4
Table 9 — Control and Power Connections, 30RB060-390
ELECTRICAL OPTION
Standard (Terminal Block)
Non-Fused Disconnect Option*
Standard (Terminal Block)
Non-Fused Disconnect Option*
Standard (Terminal Block)
Non-Fused Disconnect Option*
Standard (Terminal Block)
Non-Fused Disconnect Option
Standard (Terminal Block)
Non-Fused Disconnect Option
Standard (Terminal Block)
Non-Fused Disconnect Option
Standard (Terminal Block)
Non-Fused Disconnect Option
Standard (Terminal Block)
Non-Fused Disconnect Option
Standard (Terminal Block)
Non-Fused Disconnect
Once the well is inserted, install the thermistors. Insert the
thermistor into the well until the O-ring reaches the well body.
Use the nut on the thermistor to secure the thermistor in place.
Once the thermistor is in place, it is recommended that a
thermistor wire loop be made and secured with a wire tie to the
chilled water pipe. This will aid in thermistor retention in the
well. See Fig. 60. Attach connector (part no. HY06AM016) to
thermistor lead. Plug connector into MBB J6-CH-3.
For 30RB315-390 units, as well as all units using the dual
chiller algorithm, a Carrier Comfort Network
must be connected between the two modules. See the
Carrier Comfort Network Communication Bus Wiring section
on page 70 for additional information.
CONNECTIONS
Single Point
Dual Point
Single Point
Single Point
Dual Point
Single Point
Single Point
Dual Point
Single Point
Single Point
Dual Point
Single Point
Dual Point
Single Point
Dual Point
Single Point
Dual Point
Dual Point
Dual Point
Single Point
Dual Point
Single Point
Dual Point
Dual Point
Dual Point
Single Point
Dual Point
Single Point
Dual Point
NOTES:
1. "Combination" is identified as COMB1 in Fig. 58.
2. "Power-L" is the same as COMB1 in Fig. 58.
3. "PEB" or Power Electrical Box is shown in Fig. 58.
58
® (CCN) bus
MAIN POWER
CONTROL BOX
ENTRANCE
Circuit 1 Combination
Circuit 1 Combination
Circuit 2 Combination
Circuit 1 Combination
Circuit 1 Power-L
Circuit 1 Power-L
Circuit 2 Power-L
Circuit 1 Power-L
Circuit 1 Combination
Circuit 1 Combination
Circuit 2 Combination
Circuit 1 Combination
Circuit 1 Power-L
Circuit 1 Power-L
Circuit 2 PEB1
Circuit 1 Power-L
Circuit 1 Power-L
Circuit 2 PEB1
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 PEB1
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 Power-L
Circuit 1 Power-L
Circuit 2 PEB2
Circuit 1 Power-L
Circuit 2 PEB2
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 PEB1
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 Power-L
Circuit 1 Power-L
Circuit 2 PEB2
Circuit 1 Power-L
Circuit 2 PEB2
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 PEB2
Circuit 1 PEB1
Circuit 1 PEB1
Circuit 2 PEB2