Danfoss DSH Series Application Guide

CB
CC
DGT
F1
HP
KM
LPS
M
MPM
Ph
S
SS
CCH
UC
Figure 62: Compressor model DSH485 code 3
1
2
3
L1 L3
L2
7
8
9
L1
L3L3
L2
L2
S
L1
MPM
MPM
F1
F1
SS CC
LPS
HP
KM
UC
CB
KM
CCH
CC-000021
Thermal magnetic motor circuit breaker
Control circuit
Discharge gas thermistor (embedded in com-
pressor)
Fuses
High pressure safety switch
Compressor contactor
Safety pressure switch
Compressor motor
Motor Protection Module
Phase sequence relay
Thermistor chain (motor and discharge tem-
perature)
Seprate supply
Crankcase heater
Unit Controller
Soft starts
Soft starters are designed to reduce the starting current of 3-phase AC motors. Soft starters can be used on DSH
compressor but, in order to ensure proper lubrication of compressor parts, the settings must ensure that the
compressor start-up time is always less than 0.5 seconds.
Ramp-down must be set to minimum to ensure proper discharge valve closing.
In case of use with R454B or R452B make sure that the softstarter selected is compatible with A2L refrigerants.
Control logic
Safety control logic requirements
Table 36: Safety control logic requirements
Safeties
Tripping conditions
Re-start conditions
Value
Time
Value
Time
HP safety switch
See Pressure settings ta-
ble from section Operat-
ing envelope data
Immediate, no delay. No
by-pass
Conditions back to nor-
mal. Switch closed again
Manual reset
LP safety switch
Maximum 5 auto reset during a period of 12 hours,
then manual reset.
Electronic module (Motor
protection, DGT)
(1)
Contact M1-M2 opened
Scroll compressors, DSH090 to DSH600 | Application
© Danfoss | Climate Solutions | 2022.10 AB288965961751en-001402 | 56

Danfoss DSH Series Specifications

General

Brand	Danfoss
Model	DSH Series
Category	Air Compressor
Language	English