Danfoss DSH090 Application Guidelines

GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Test N° Purpose Test conditions Pass criteria Solutions
1
Check proper
oil return
Lowest foreseeable evaporation,
and highest foreseeable
condensation.
Minimum number of compressor
running for 6 hours.
For reversible system, perform test
in both heating and cooling mode.
Oil level must be visible or full in the
sight glass when the compressor is
running and when all compressors
of the circuit are stopped.
1. Top-up with oil, generally 3% of
the total system refrigerant charge
(in weight). Above 3% look for
potential oil trap in the system.
2. Integrate a function in control
logic to run all compressors
simultaneously in order to boost oil
return (for more details see section
“Control Logic”)
3. Oil separator can be added
2
Check oil
balancing
Lowest foreseeable evaporation,
and highest foreseeable
condensation.
All compressor running for 6
hours.
For reversible system, perform test
in both heating and cooling mode.
Oil level must be visible or full
in the sight glass when the
compressors are running and when
all compressors of the circuit are
stopped
1. Top-up with oil, generally 3% of
the total system refrigerant charge
(in weight).
2. Check that manifold piping is
conform to Danfoss requirements.
3. Integrate a function in control
logic to stop manifold periodically in
order to balance oil (for more details
see section “Control Logic”)
3
Oil return in
split systems
Since each installation is unique,
test 1 and 2 can not fully validate
the oil return. Oil level must
be checked and adjusted at
commissioning.
Oil level must be visible or full in the
sight glass when the compressor is
running and when all compressors
of the circuit are stopped.
1. Pay special attention to “Piping
design”
2. Oil separator is strongly
recommended, espacially in case of
part load.
A
Manage oil in the circuit
R
Requirement
System evaluation
Test, criteria and solutions
Oil level must be visible or full in the sight
glass when the compressor is running and when
all compressors of the circuit are stopped.
Single compressor Manifold compressors
Non split Test N°1 Test N°1+2
Split Test N°1+3 Test N°1+2+3
A
31FRCC.PC.045.A7.02

Danfoss DSH090 Specifications

General

Brand	Danfoss
Model	DSH090
Category	Air Compressor
Language	English