Terminal Box - Emerson Copeland YB56K1G Application Manuallines

The recommended wiring diagrams for the YB*K1G range of compressors are shown hereunder:
Power circuit
Motor terminal connections
Three-phase compressors are connected to
the T1, T2 and T3 connections
Legend
B1 ................ System controller
B3 ................ Discharge gas thermostat
F1, F6...F8 .. Fuses
F3 ................ HP limiter
F4 ................ LP limiter
Figure 15
4.3

Terminal box

WARNING
Ignition source in a potentially flammable atmosphere! Fire hazard!
Particular attention must be paid in A3-refrigerant systems as any work on the
energized terminals in the compressor terminal box could create an ignition.
Do not touch the energized terminals with a tool or cable when the compressor
is energized.
Compressors operating with flammable refrigerants shall use only the qualified
terminal box supplied with the compressor.
CAUTION
Mechanical stress or shock! Overheating! Terminal Fusite damage and
leakage! Mechanical stress and shocks to the Fusite must be avoided as they
could damage the glass and/or ceramic. This might result in hermetic failure
or loss of terminal performance. Precautions are required to prevent striking
or bending of pins. Bent or damaged pins may result in loss of hermeticity
and/or terminal performance.
Ensure correct connection of cables to the compressor terminal Fusite to avoid
local overheating of Fusite pins which might lead to refrigerant leaks.
Cable glands have an influence on the protection class of the terminal box. Copeland strongly
recommends using appropriate cable glands according to EN 50262 in order to reach the rated
protection class. Examples of correct electrical installations are shown in Figures 16 & 18 below.
18
Control circuit
K1, K2 ...... Contactors
Q1 ............ Main switch
R2 ............ Crankcase heater
S1 ............ Auxiliary switch
RCD ......... Residual current device
AGL_Ref_ST_YBK1G_EN_Rev01