Name: Carrier AQUASNAP 30RAP010-150
Brand: Carrier
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LEGEND FOR FIG. 3-19

Main Base Board (MBB)

See Fig. 20. The MBB is the heart of the ComfortLink control sys-

tem. It contains the major portion of operating software and con-

trols the operation of the machine. The MBB continuously moni-

tors input/output channel information received from its inputs and

from all other modules. The MBB receives inputs from the dis-

charge and suction pressure transducers and thermistors. See

Table 5. The MBB also receives the feedback inputs from each

compressor current sensor board and other status switches. See

Tables 6 and 7. The MBB also controls several outputs. Relay out-

puts controlled by the MBB are shown in Tables 8 and 9. Informa-

tion is transmitted between modules via a 3-wire communication

bus or LEN (Local Equipment Network). The CCN (Carrier Com-

fort Network) bus is also supported. Connections to both LEN and

CCN buses are made at the LVT (low voltage terminal). See

Fig. 20 and 21.

Fig. 20 — Main Base Board

ALMR — Alarm Relay FCB — Fan Circuit Breaker SW — Switch

AUX — Auxiliary FIOP — Factory-Installed Option TB — Terminal Block

BR — Boiler Relay FR — Fan Relay TNKR — Storage Tank Heater Relay

C — Contactor, Compressor FU — Fuse TRAN — Transformer

CB — Circuit Breaker FVFD Fan Variable Frequency Drive UPC — Unitary Protocol Converter

CCB — Compress

or Circuit Breaker GND — Ground VFD — Variable Frequency Drive

CH — Crankcase Heater HPS — High-Pressure Switch

Terminal Block

CHC — Cooler/Pump Heater Contactor HR — Heat Relay

COMP — Compressor LON — Local Operating Network

Terminal (Unmarked)

CSB — Current Sensor Board LVT — Low Voltage Terminal Block

CWFS — Chilled Water Flow Switch LWT — Leaving Water Temperature

Terminal (Marked)

CWP — Chilled Water Pump MBB — Main Base Board

CXB — Compr

essor Expansion Board MLV — Minimum Load Valve

Splice

DGS — Digital Scroll Compressor MM — Motormaster

DPT — Discharge Pressure Transducer MP — Motor Protector

Factory Wiring

DTT — Discharge Temperature Thermistor MS — Manual Starter

DUS — Digital Unloader Solenoid NEC — National Electrical Code

Field Wiring

EMM — Energy Management OAT — Outdoor-Air Thermistor

EWT — Entering Water Temperature OFM — Outdoor Fan Motor

Accessory or Option Wir

ing

EXV — Electronic Expansion Valve RGT — Return Gas Thermistor

FB — Fuse Block SCCR — Short Circuit Current Rating

To indicate common potential

only; not to represent wiring.

FC — Fan Contactor SPT — Suction Pressure Transducer

CEPL130346-01

STATUS

LEN

J10

CCN

RED LED - STATUS GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

YELLOW LED -

CCN (CARRIER COMFORT NETWORK)

INSTANCE JUMPER

K11

K10 K9

K3 K2

2 1

Brand	Carrier
Model	AQUASNAP 30RAP010-150
Category	Chiller
Language	English

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