58
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
/
4
in. NPT fitting for securing the
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.
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
®
(CCN) bus
must be connected between the two modules. See the
Carrier Comfort Network Communication Bus Wiring section
on page 70 for additional information.
Table 9 — Control and Power Connections, 30RB060-390
*Dual point connection is not available when non-fused disconnect
option is selected.
†Single point connection not available.
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.
30RB UNIT SIZE
VOLTAGE
ELECTRICAL OPTION
CONNECTIONS
MAIN POWER
ENTRANCE
CONTROL BOX
060,070
208/230, 380,
460, 575
Standard (Terminal Block)
Single Point
Circuit 1
Combination
Dual Point
Circuit 1
Combination
Circuit 2
Combination
Non-Fused Disconnect Option*
Single Point
Circuit 1
Combination
080-120
208/230
Standard (Terminal Block)
Single Point
Circuit 1
Power-L
Dual Point
Circuit 1
Power-L
Circuit 2
Power-L
Non-Fused Disconnect Option*
Single Point
Circuit 1
Power-L
380, 460, 575
Standard (Terminal Block)
Single Point
Circuit 1
Combination
Dual Point
Circuit 1
Combination
Circuit 2
Combination
Non-Fused Disconnect Option*
Single Point
Circuit 1
Combination
130-190,
315A-390A,
315B-390B
208/230
Standard (Terminal Block)
Single Point
Circuit 1
Power-L
Dual Point
Circuit 1
Power-L
Circuit 2
PEB1
Non-Fused Disconnect Option
Single Point
Circuit 1
Power-L
Dual Point
Circuit 1
Power-L
Circuit 2
PEB1
380, 460, 575
Standard (Terminal Block)
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
PEB1
Non-Fused Disconnect Option
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
Power-L
210, 225
208/230†
Standard (Terminal Block)
Dual Point
Circuit 1
Power-L
Circuit 2
PEB2
Non-Fused Disconnect Option
Dual Point
Circuit 1
Power-L
Circuit 2
PEB2
380, 460, 575
Standard (Terminal Block)
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
PEB1
Non-Fused Disconnect Option
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
Power-L
250-300
208/230†
Standard (Terminal Block)
Dual Point
Circuit 1
Power-L
Circuit 2
PEB2
Non-Fused Disconnect Option
Dual Point
Circuit 1
Power-L
Circuit 2
PEB2
380, 460, 575
Standard (Terminal Block)
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
PEB2
Non-Fused Disconnect
Single Point
Circuit 1
PEB1
Dual Point
Circuit 1
PEB1
Circuit 2
PEB2
Содержание MINIMUM LOAD CONTROL ACCESSORY 30RB060-390
Страница 36: ...36 Fig 24 Unit Rigging Label Detail 30RB060 150...
Страница 37: ...37 Fig 25 Unit Rigging Label Detail 30RB160 300...
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