Danfoss H series compressors and MLM/MLZ compressors Installation Guide

INSTRUCTIONS
H SERIES COMPRESSORS
A:
B:
C:
D:
E:
F:
G:
H:
I:
J:
Model number
Technical number
Serial Number
Manufacturing year
Internal protection
Supply voltage range
Run capacitor
Locked rotor current
Maximum operating current
Lubricant type and nominal charge
Approved Refrigerant
Instructions
F
G
H
I
J
A
400
B
C
D
E
Installation and servicing of the
compressor by qualified personnel
only. Follow these instructions and sound
refrigeration engineering practice relating to
installation, commissioning, maintenance and
service.
Electrical connections
Operating limits
Single phase
HRM/HLM/HCM - HRP/HLP/HCP - HRH/HLH/HLJ/HCJ
Model variation T (R22 / R407C / R410A)
PSC wiring
C
70
65
C o n d . T e m p . (°C )
60
S
SH 30K
55
SH 11K
Run
Capacitor
Line
50
45
40
35
R
30
25
Quick connect
spade terminals
terminals
Quick connect
spade
P terminal box type
20
-30
-25
-20
-15
-10
-5
0
5
10
15
P terminal box type
E v a p . T e m p . (°C )
CSR wiring
5
HRM/HLM/HCM - HRP/HLP/HCP - HRH/HLH/HLJ/HCJ
Model variation U (R22 / R410A)
C
T₁
70
C
Potential
Relay
2
S
1
65
S
T₂
C o n d . T e m p . (°C )
60
55
SH 30K
50
SH 11K
R
T₃
45
40
Start
Capacitor
Run
Capacitor
Line
R
35
-30
-25
-20
-15
-10
-5
0
5
10
Three phase (Wiring diagram with pump-down cycle)
Ring connect screw
screw terminals
Ring connect
terminals
C terminal box type
C terminal box type
20
15
E v a p . T e m p . (°C )
CONTROL CIRCUIT
L1
L3
L2
Q1
HHP (R407C)
70
F1
push
F1
KM
KA
65
SH 5K
60
C o n d . T e m p . (°C )
4 – Assembly
•Slowly release the nitrogen holding charge
through discharge and suction ports.
•Connect the compressor to the system as soon as possible to avoid oil contamination from ambient moisture.
•Avoid material entering into the system while cutting
tubes. Never drill holes where burrs cannot be removed.
•Braze with great care using state-of-the-art technique and vent piping with nitrogen gas flow.
•Connect the required safety and control devices.
When the schrader port, if any, is used for this, remove the internal valve.
•For parallel assemblies of the compressors in version C8, contact Danfoss.
5 – Leak detection
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosion.
•Do not use leak detection dye.
•Perform a leak detection test on the complete system.
•The low side test pressure must not exceed 31 bar
/450 psi.
•When a leak is discovered, repair the leak and repeat the leak detection.
6 – Vacuum dehydration
•Never use the compressor to evacuate the system.
•Connect a vacuum pump to both the LP & HP sides.
•Pull down the system under a vacuum of
500 µm Hg (0.67 mbar) / 0.02 inch Hg absolute.
•Do not use a megohmmeter nor apply power to
the compressor while it is under vacuum as this
may cause internal damage.
30
25
55
KM
KA
KS
KA
PM
SH 10K
A1
50
T1
T2
A3
45
push
40
KS
180 s
HPs
T3
A2
35
TH
LP
30
25
KS
M
DGT
20
-30
-25
-20
-15
-10
-5
0
5
10
15
KM
push
E v a p . T e m p . (°C )
KA
LLSV
KS
Wiring diagram with pump-down cycle
The compressor must only be used
Never operate
for its designed purpose(s) and within compressor without
its scope of application (refer to «ope- terminal box cover
rating limits»). Consult Application in place and secured.
guidelines and datasheet available
from cc.danfoss.com
1 – Introduction
These instructions pertain to the Performer® HRM/
HLM/HCM - HRP/HLP/HCP/HHP - HRH/HLH/HLJ/
HCJ scroll compressors used for HVAC systems. They
provide necessary information regarding safety and
proper usage of this product.
2 – Handling and storage
•Handle the compressor with care. Use the dedicated
handles in the packaging. Use the compressor lifting
1
H series
•Use clean and dehydrated system components.
•The piping connected to the compressor must be
flexible in 3 dimensions to dampen vibrations.
•The compressor must always be mounted with the
rubber grommets supplied with the compressor.
The compressor is delivered
under nitrogen gas pressure
(between 0.3 and 0.4 bar / 4 and
6 psi). Do not disassemble bolts,
plugs, fittings, etc... unless
all pressure has been relieved
from the compressor.
Under all circumstances,
the EN378 (or other applicable
local safety regulation) requirements must be fulfilled.
Wear protective goggles and
work gloves.
lug and use appropriate and safe lifting equipment.
•Store and transport the compressor in an upright
position.
•Store the compressor between -35°C and 70°C /
-31°F and 158°F.
•Don’t expose the compressor and the packaging
to rain or corrosive atmosphere.
3 – Safety measures before assembly
Never use the compressor in a flammable atmosphere.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
The compressor must
be handled with caution
in the vertical position
(maximum offset from
the vertical : 15°).
•Mount the compressor on a horizontal flat surface with less than 7° slope.
•Verify that the power supply corresponds to the
compressor motor characteristics (see nameplate).
•When installing a compressor model HRP / HLP /
HCP / HHP - HRH / HLH /HLJ / HCJ, use equipment
specifically reserved for HFC refrigerants which
was never used for CFC or HCFC refrigerants.
•Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material.
7 – Electrical connections
•Switch off and isolate the main power supply.
•All electrical components must be selected as per local
standards and compressor requirements.
•Refer to page 1 for electrical connections details.For
three phase applications, the terminals are labeled T1,
T2, and T3. For single-phase applications the terminals
are labeled C (common), S (start), and R (run).
•Danfoss scroll compressors will only compress gas
while rotating counter-clockwise (when viewed from
the compressor top). Since single-phase motors will
start and run in only one direction, reverse rotation is
not a major consideration. Three-phase motors, however, will start and run in either direction, depending on
the phase angles of the supplied power. Care must be
taken during installation to ensure that the compressor operates in the correct direction.
•Use ø 4.8 mm / #10 - 32 screws and ¼” ring terminals
for the power connection with ring connect screw terminal (C type). Fasten with 3 Nm torque.
•Use ø 6.3 mm tabs for quick connect spade terminals (P type).
•Use a self tapping screw to connect the compressor to earth.
8 – Filling the system
•Keep the compressor switched off.
•Keep the refrigerant charge below the indicated
charge limits if possible. Above this limit; protect
the compressor against liquid flood-back with a
pump-down cycle or suction line accumulator.
•Never leave the filling cylinder connected to the circuit.
Compressor models
HRM032-034-038-040-042-045-047
HRP034-038-040-042-045-047
HHP015-019-021-026
HRH031-032-034-036-038-040
HRM048-051-054-058-060 /
HLM068-072-075-078-081
HRP048-051-054-058-060 /
HLP068-072-075-081
HHP030-038-045
HRH044-049-051-054-056 /
HLH061-068 - HLJ072-083
HCM094-109-120
HCP094-109-120
HCJ090-105-120
Refrigerant
charge limit
3.6 kg / 8 lb
5.4 kg / 12 lb
7.2 kg / 16 lb
9 – Verification before commissioning
Use safety devices such as safety pressure
switch and mechanical relief valve in compliance
with both generally and locally applicable regulations and safety standards. Ensure that they are
operational and properly set.
Check that the settings of high-pressure switches don’t exceed the maximum service pressure
of any system component.
•A low-pressure switch is recommended to avoid
low pressure operation.
Minimum setting for R22
1.5 bar (absolute) / 22 psia
Minimum setting for R407C
Minimum setting for R410A 2.5 bar (absolute) / 36 psia
•Verify that all electrical connections are properly fastened and in compliance with local regulations.
•When a crankcase heater is required, it must be
energized at least 24 hours before initial start-up
and start-up after prolonged shutdown.
10 – Start-up
•Never start the compressor when no refrigerant is
charged.
•Do not provide any power to the compresor
unless suction and discharge service valves are
open, if installed.
•Energize the compressor. It must start promptly.
If the compressor does not start, check wiring
conformity and voltage on terminals.
•Eventual reverse rotation can be detected by following
phenomena; the excessive noise, no pressure differential between suction and discharge, and line warming
rather than immediate cooling. A service technician
should be present at initial start-up to verify that supply power is properly phased and that the compressor
is rotating in the correct direction. H-series Scroll compressors are designed to operate for a maximum of
150 hours in reverse, but as a reverse rotation situation
can go unnoticed for longer periods, phase monitors
are recommended. For compressors HLM078, HLP081,
HLJ083 and larger, phase monitors are required for all
applications. Danfoss recommends phase protection
for residential compressors.
•If the internal overload protector trips out, it must cool
down to 60°C / 140°F to reset. Depending on ambient
temperature, this may take up to several hours.
11 – Check with running compressor
Check current draw and voltage. Measurement
of amps and volts during running conditions must
be taken at other points in the power supply, not in
the compressor electrical box.
•Check suction superheat to reduce risk of slugging.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Observe the oil level in the sight glass (if provided) for about 60 minutes to ensure proper oil
return to the compressor.
•Respect the operating limits.
•Check all tubes for abnormal vibration. Movements in excess of 1.5 mm / 0.06 in require corrective measures such as tube brackets.
•When needed, additional refrigerant in liquid phase
may be added in the low-pressure side as far as possible from the compressor. The compressor must be
operating during this process.
•Do not overcharge the system.
•Never release refrigerant to atmosphere.
•Before leaving the installation site, carry out a
general installation inspection regarding cleanliness, noise and leak detection.
•Record type and amount of refrigerant charge as
well as operating conditions as a reference for future inspections.
12 – Maintenance
Internal pressure and surface temperature are
dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed
100°C / 212°F and can cause severe burns.
Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.
To prevent system related compressor problems, following periodic maintenance is recommended:
•Verify that safety devices are operational and properly set.
•Ensure that the system is leak tight.
•Check the compressor current draw.
•Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
•Check that all electrical connections are still adequately fastened.
•Keep the compressor clean and verify the absence of rust and oxidation on the compressor shell,
tubes and electrical connections.
•Acid / moisture content in system and oil should
be checked regularly.
13 - Warranty
Always transmit the model number and serial number
with any claim filed regarding this product.
The product warranty may be void in following cases:
•Absence of nameplate.
•External modifications; in particular, drilling, welding, broken feet and shock marks.
•Compressor opened or returned unsealed.
•Rust, water or leak detection dye inside the compressor.
•Use of a refrigerant or lubricant not approved by
Danfoss.
•Any deviation from recommended instructions pertaining to installation, application or maintenance.
•Use in mobile applications.
•Use in explosive atmospheric environment.
•No model number or serial number transmitted
with the warranty claim.
14 – Disposal
Danfoss recommends that compressors
and compressor oil should be recycled by
a suitable company at its site.
2
INSTRUCTIONS
H SERIES COMPRESSORS
A:
B:
C:
D:
E:
F:
G:
H:
I:
J:
Model number
Technical number
Serial Number
Manufacturing year
Internal protection
Supply voltage range
Run capacitor
Locked rotor current
Maximum operating current
Lubricant type and nominal charge
Approved Refrigerant
Instructions
F
G
H
I
J
A
400
B
C
D
E
Installation and servicing of the
compressor by qualified personnel
only. Follow these instructions and sound
refrigeration engineering practice relating to
installation, commissioning, maintenance and
service.
Electrical connections
Operating limits
Single phase
HRM/HLM/HCM - HRP/HLP/HCP - HRH/HLH/HLJ/HCJ
Model variation T (R22 / R407C / R410A)
PSC wiring
C
70
65
C o n d . T e m p . (°C )
60
S
SH 30K
55
SH 11K
Run
Capacitor
Line
50
45
40
35
R
30
25
Quick connect
spade terminals
terminals
Quick connect
spade
P terminal box type
20
-30
-25
-20
-15
-10
-5
0
5
10
15
P terminal box type
E v a p . T e m p . (°C )
CSR wiring
5
HRM/HLM/HCM - HRP/HLP/HCP - HRH/HLH/HLJ/HCJ
Model variation U (R22 / R410A)
C
T₁
70
C
Potential
Relay
2
S
1
65
S
T₂
C o n d . T e m p . (°C )
60
55
SH 30K
50
SH 11K
R
T₃
45
40
Start
Capacitor
Run
Capacitor
Line
R
35
-30
-25
-20
-15
-10
-5
0
5
10
Three phase (Wiring diagram with pump-down cycle)
Ring connect screw
screw terminals
Ring connect
terminals
C terminal box type
C terminal box type
20
15
E v a p . T e m p . (°C )
CONTROL CIRCUIT
L1
L3
L2
Q1
HHP (R407C)
70
F1
push
F1
KM
KA
65
SH 5K
60
C o n d . T e m p . (°C )
4 – Assembly
•Slowly release the nitrogen holding charge
through discharge and suction ports.
•Connect the compressor to the system as soon as possible to avoid oil contamination from ambient moisture.
•Avoid material entering into the system while cutting
tubes. Never drill holes where burrs cannot be removed.
•Braze with great care using state-of-the-art technique and vent piping with nitrogen gas flow.
•Connect the required safety and control devices.
When the schrader port, if any, is used for this, remove the internal valve.
•For parallel assemblies of the compressors in version C8, contact Danfoss.
5 – Leak detection
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosion.
•Do not use leak detection dye.
•Perform a leak detection test on the complete system.
•The low side test pressure must not exceed 31 bar
/450 psi.
•When a leak is discovered, repair the leak and repeat the leak detection.
6 – Vacuum dehydration
•Never use the compressor to evacuate the system.
•Connect a vacuum pump to both the LP & HP sides.
•Pull down the system under a vacuum of
500 µm Hg (0.67 mbar) / 0.02 inch Hg absolute.
•Do not use a megohmmeter nor apply power to
the compressor while it is under vacuum as this
may cause internal damage.
30
25
55
KM
KA
KS
KA
PM
SH 10K
A1
50
T1
T2
A3
45
push
40
KS
180 s
HPs
T3
A2
35
TH
LP
30
25
KS
M
DGT
20
-30
-25
-20
-15
-10
-5
0
5
10
15
KM
push
E v a p . T e m p . (°C )
KA
LLSV
KS
Wiring diagram with pump-down cycle
The compressor must only be used
Never operate
for its designed purpose(s) and within compressor without
its scope of application (refer to «ope- terminal box cover
rating limits»). Consult Application in place and secured.
guidelines and datasheet available
from cc.danfoss.com
1 – Introduction
These instructions pertain to the Performer® HRM/
HLM/HCM - HRP/HLP/HCP/HHP - HRH/HLH/HLJ/
HCJ scroll compressors used for HVAC systems. They
provide necessary information regarding safety and
proper usage of this product.
2 – Handling and storage
•Handle the compressor with care. Use the dedicated
handles in the packaging. Use the compressor lifting
1
H series
•Use clean and dehydrated system components.
•The piping connected to the compressor must be
flexible in 3 dimensions to dampen vibrations.
•The compressor must always be mounted with the
rubber grommets supplied with the compressor.
The compressor is delivered
under nitrogen gas pressure
(between 0.3 and 0.4 bar / 4 and
6 psi). Do not disassemble bolts,
plugs, fittings, etc... unless
all pressure has been relieved
from the compressor.
Under all circumstances,
the EN378 (or other applicable
local safety regulation) requirements must be fulfilled.
Wear protective goggles and
work gloves.
lug and use appropriate and safe lifting equipment.
•Store and transport the compressor in an upright
position.
•Store the compressor between -35°C and 70°C /
-31°F and 158°F.
•Don’t expose the compressor and the packaging
to rain or corrosive atmosphere.
3 – Safety measures before assembly
Never use the compressor in a flammable atmosphere.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
The compressor must
be handled with caution
in the vertical position
(maximum offset from
the vertical : 15°).
•Mount the compressor on a horizontal flat surface with less than 7° slope.
•Verify that the power supply corresponds to the
compressor motor characteristics (see nameplate).
•When installing a compressor model HRP / HLP /
HCP / HHP - HRH / HLH /HLJ / HCJ, use equipment
specifically reserved for HFC refrigerants which
was never used for CFC or HCFC refrigerants.
•Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material.
7 – Electrical connections
•Switch off and isolate the main power supply.
•All electrical components must be selected as per local
standards and compressor requirements.
•Refer to page 1 for electrical connections details.For
three phase applications, the terminals are labeled T1,
T2, and T3. For single-phase applications the terminals
are labeled C (common), S (start), and R (run).
•Danfoss scroll compressors will only compress gas
while rotating counter-clockwise (when viewed from
the compressor top). Since single-phase motors will
start and run in only one direction, reverse rotation is
not a major consideration. Three-phase motors, however, will start and run in either direction, depending on
the phase angles of the supplied power. Care must be
taken during installation to ensure that the compressor operates in the correct direction.
•Use ø 4.8 mm / #10 - 32 screws and ¼” ring terminals
for the power connection with ring connect screw terminal (C type). Fasten with 3 Nm torque.
•Use ø 6.3 mm tabs for quick connect spade terminals (P type).
•Use a self tapping screw to connect the compressor to earth.
8 – Filling the system
•Keep the compressor switched off.
•Keep the refrigerant charge below the indicated
charge limits if possible. Above this limit; protect
the compressor against liquid flood-back with a
pump-down cycle or suction line accumulator.
•Never leave the filling cylinder connected to the circuit.
Compressor models
HRM032-034-038-040-042-045-047
HRP034-038-040-042-045-047
HHP015-019-021-026
HRH031-032-034-036-038-040
HRM048-051-054-058-060 /
HLM068-072-075-078-081
HRP048-051-054-058-060 /
HLP068-072-075-081
HHP030-038-045
HRH044-049-051-054-056 /
HLH061-068 - HLJ072-083
HCM094-109-120
HCP094-109-120
HCJ090-105-120
Refrigerant
charge limit
3.6 kg / 8 lb
5.4 kg / 12 lb
7.2 kg / 16 lb
9 – Verification before commissioning
Use safety devices such as safety pressure
switch and mechanical relief valve in compliance
with both generally and locally applicable regulations and safety standards. Ensure that they are
operational and properly set.
Check that the settings of high-pressure switches don’t exceed the maximum service pressure
of any system component.
•A low-pressure switch is recommended to avoid
low pressure operation.
Minimum setting for R22
1.5 bar (absolute) / 22 psia
Minimum setting for R407C
Minimum setting for R410A 2.5 bar (absolute) / 36 psia
•Verify that all electrical connections are properly fastened and in compliance with local regulations.
•When a crankcase heater is required, it must be
energized at least 24 hours before initial start-up
and start-up after prolonged shutdown.
10 – Start-up
•Never start the compressor when no refrigerant is
charged.
•Do not provide any power to the compresor
unless suction and discharge service valves are
open, if installed.
•Energize the compressor. It must start promptly.
If the compressor does not start, check wiring
conformity and voltage on terminals.
•Eventual reverse rotation can be detected by following
phenomena; the excessive noise, no pressure differential between suction and discharge, and line warming
rather than immediate cooling. A service technician
should be present at initial start-up to verify that supply power is properly phased and that the compressor
is rotating in the correct direction. H-series Scroll compressors are designed to operate for a maximum of
150 hours in reverse, but as a reverse rotation situation
can go unnoticed for longer periods, phase monitors
are recommended. For compressors HLM078, HLP081,
HLJ083 and larger, phase monitors are required for all
applications. Danfoss recommends phase protection
for residential compressors.
•If the internal overload protector trips out, it must cool
down to 60°C / 140°F to reset. Depending on ambient
temperature, this may take up to several hours.
11 – Check with running compressor
Check current draw and voltage. Measurement
of amps and volts during running conditions must
be taken at other points in the power supply, not in
the compressor electrical box.
•Check suction superheat to reduce risk of slugging.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Observe the oil level in the sight glass (if provided) for about 60 minutes to ensure proper oil
return to the compressor.
•Respect the operating limits.
•Check all tubes for abnormal vibration. Movements in excess of 1.5 mm / 0.06 in require corrective measures such as tube brackets.
•When needed, additional refrigerant in liquid phase
may be added in the low-pressure side as far as possible from the compressor. The compressor must be
operating during this process.
•Do not overcharge the system.
•Never release refrigerant to atmosphere.
•Before leaving the installation site, carry out a
general installation inspection regarding cleanliness, noise and leak detection.
•Record type and amount of refrigerant charge as
well as operating conditions as a reference for future inspections.
12 – Maintenance
Internal pressure and surface temperature are
dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed
100°C / 212°F and can cause severe burns.
Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.
To prevent system related compressor problems, following periodic maintenance is recommended:
•Verify that safety devices are operational and properly set.
•Ensure that the system is leak tight.
•Check the compressor current draw.
•Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
•Check that all electrical connections are still adequately fastened.
•Keep the compressor clean and verify the absence of rust and oxidation on the compressor shell,
tubes and electrical connections.
•Acid / moisture content in system and oil should
be checked regularly.
13 - Warranty
Always transmit the model number and serial number
with any claim filed regarding this product.
The product warranty may be void in following cases:
•Absence of nameplate.
•External modifications; in particular, drilling, welding, broken feet and shock marks.
•Compressor opened or returned unsealed.
•Rust, water or leak detection dye inside the compressor.
•Use of a refrigerant or lubricant not approved by
Danfoss.
•Any deviation from recommended instructions pertaining to installation, application or maintenance.
•Use in mobile applications.
•Use in explosive atmospheric environment.
•No model number or serial number transmitted
with the warranty claim.
14 – Disposal
Danfoss recommends that compressors
and compressor oil should be recycled by
a suitable company at its site.
2
INSTRUCTIONS
MLZ / MLM COMPRESSORS
A:
B:
C:
D:
E:
F:
G:
Model number
Technical number
Serial Number
Internal protection
Supply voltage range
Run capacitor
Locked rotor current
Maximum operating current
H: Lubricant type and nominal charge
I: Approved Refrigerant
J: Manufacturing year
Instructions
C
E
F
G
H
I
D
J
A
B
Installation and servicing of the
compressor by qualified personnel
only. Follow these instructions and sound
refrigeration engineering practice relating to
installation, commissioning, maintenance and
service.
Cond. Temp. (°C)
Operating limits
MLZ - R404A / R507
65
60
55
50
45
40
35
30
25
20
15
10
5
-35
Electrical connections
Single phase
N

L₁
PSC wiring
C
Thermostat
IOL
RGT: 18°C
S
Run capacitor
-30
-25
-20
-15
-10
-5
Evap. Temp. (°C)
0
5
10
Quick connect
spade terminals
Quick connect
spade
terminals
P terminal box type
P terminal box type
15
 : For transient conditions
MLZ - R134a
N
C
5
2
70
65
S
T₂
60
Cond. Temp. (°C)
CSR wiring
Start Relay
Thermostat
C
T₁
75
L₁
R
55
SH: 11K
50
Run capacitor
R
T₃
45
40
S
1
R
15 kΩ -1 w
Start capacitor
35
30
Three phase (Wiring diagram with pump-down cycle)
25
20
15
-20
-15
-10
-5
0
5
Evap. Temp. (°C)
10
15
Ring connectscrew
screw terminals
Ring connect
terminals
C terminal box type
C terminal box type
20
Cond. Temp. (°C)
MLZ / MLM - R22
70
65
60
55
50
45
40
35
30
25
20
15
10
-35
L1
L3
L2
Q1
F1
KM
KA
KM
KA
KS
KA
PM
A1
T1
SH: 11K
T2
A3
KS
RGT: 25°C
180 s
push
HPs
T3
A2
TH
LP
KS
M
DGT
KM
-30
-25
-20
-15
-10
-5
Evap. Temp. (°C)
0
5
10
KA
LLSV
KS
push
15
Wiring diagram with pump-down cycle
1 – Introduction
These instructions pertain to the MLZ / MLM scroll compressors used for refrigeration systems. They provide
necessary information regarding safety and proper
usage of this product.
2 – Handling and storage
•Handle the compressor with care. Use the dedicated handles in the packaging. Use the compressor lifting lug and use appropriate and safe lifting
The compressor is delivered
under nitrogen gas pressure
(between 0.3 and 0.4 bar / 4 and
6 psi). Do not disassemble bolts,
plugs, fittings, etc... unless
all pressure has been relieved
from the compressor.
Under all circumstances,
the EN378 (or other applicable
local safety regulation) requirements must be fulfilled.
Wear protective goggles and
work gloves.
equipment.
•Store and transport the compressor in an upright
position.
•Store the compressor between -35°C and 70°C /
-31°F and 158°F.
•Don’t expose the compressor and the packaging
to rain or corrosive atmosphere.
3 – Safety measures before assembly
Never use the compressor in a flammable atmosphere.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Use clean and dehydrated system components.
•The piping connected to the compressor must be
flexible in 3 dimensions to dampen vibrations.
•The compressor must always be mounted with the
rubber grommets supplied with the compressor.
4 – Assembly
•Slowly release the nitrogen holding charge
through discharge and suction ports.
•Connect the compressor to the system as soon as
possible to avoid oil contamination from ambient
moisture.
•Avoid material entering into the system while cutting tubes. Never drill holes where burrs cannot
be removed.
•Braze with great care using state-of-the-art technique and vent piping with nitrogen gas flow.
•Connect the required safety and control devices.
When the schrader port, if any, is used for this, remove the internal valve.
•For parallel assemblies of the compressors in version C8, contact Danfoss.
5 – Leak detection
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosion.
•Do not use leak detection dye.
•Perform a leak detection test on the complete system.
•The low side test pressure must not exceed 31 bar
/450 psi.
•When a leak is discovered, repair the leak and repeat the leak detection.
6 – Vacuum dehydration
•Never use the compressor to evacuate the system.
•Connect a vacuum pump to both the LP & HP sides.
•Pull down the system under a vacuum of
500 µm Hg (0.67 mbar) / 0.02 inch Hg absolute.
•Do not use a megohmmeter nor apply power to
the compressor while it is under vacuum as this
may cause internal damage.
F1
push
Never operate
The compressor must only be used
for its designed purpose(s) and within compressor without
its scope of application (refer to «ope- terminal box cover
rating limits»). Consult Application in place and secured.
guidelines and datasheet available
from cc.danfoss.com
3
CONTROL CIRCUIT
MLZ / MLM
The compressor must
be handled with caution
in the vertical position
(maximum offset from
the vertical : 15°).
•Mount the compressor on a horizontal flat surface with less than 7° slope.
•Verify that the power supply corresponds to the compressor motor characteristics (see nameplate).
•When installing a compressor for R404A,R507or
R134a, use equipment specifically reserved for HFC
refrigerants which was never used for CFC or HCFC
refrigerants.
•Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material.
7 – Electrical connections
•Switch off and isolate the main power supply.
•All electrical components must be selected as per
local standards and compressor requirements.
•Refer to page 3 for electrical connections details.
For three phase applications, the terminals are
labeled T1, T2, and T3. For single-phase applications the terminals are labeled C (common), S
(start), and R (run).
•Danfoss scroll compressors will only compress
gas while rotating counter-clockwise (when
viewed from the compressor top). Since singlephase motors will start and run in only one direction, reverse rotation is not a major consideration. Three-phase motors, however, will start and
run in either direction, depending on the phase
angles of the supplied power. Care must be taken
during installation to ensure that the compressor
operates in the correct direction.
•Use ø 4.8 mm / #10 - 32 screws and ¼” ring terminals
for the power connection with ring connect screw terminal (C type). Fasten with 3 Nm torque.
•Use ø 6.3 mm tabs for quick connect spade terminals (P type).
•Use a self tapping screw to connect the compressor to earth.
8 – Filling the system
•Keep the compressor switched off.
•Keep the refrigerant charge below the indicated
charge limits if possible. Above this limit; protect the
compressor against liquid flood-back with a pumpdown cycle or suction line accumulator.
•Never leave the filling cylinder connected to the circuit.
Compressor models
MLZ / MLM015-019-021-026
MLZ / MLM030-038-045-048
MLZ / MLM058-066-076
Refrigerant
charge limit
3.6 kg / 8 lb
5.4 kg / 12 lb
7.2 kg / 16 lb
9 – Verification before commissioning
Use safety devices such as safety pressure
switch and mechanical relief valve in compliance
with both generally and locally applicable regulations and safety standards. Ensure that they are
operational and properly set.
Check that the settings of high-pressure switches don’t exceed the maximum service pressure
of any system component.
•A low-pressure switch is recommended to avoid
low pressure operation.
Minimum setting for R22
1.5 bar (absolute) / 22 psia
Minimum setting for R404A 2.4 bar (absolute) / 35 psia
Minimum setting for R134a 1.45 bar (absolute) / 21 psia
•Verify that all electrical connections are properly
fastened and in compliance with local regulations.
•When a crankcase heater is required, it must be
energized at least 24 hours before initial start-up
and start-up after prolonged shutdown.
10 – Start-up
•Never start the compressor when no refrigerant is
charged.
•Do not provide any power to the compresor
unless suction and discharge service valves are
open, if installed.
•Energize the compressor. It must start promptly.
If the compressor does not start, check wiring
conformity and voltage on terminals.
•Eventual reverse rotation can be detected by following phenomena; the excessive noise, no pressure differential between suction and discharge,
and line warming rather than immediate cooling.
A service technician should be present at initial
start-up to verify that supply power is properly
phased and that the compressor is rotating in the
correct direction. MLZ / MLM Scroll compressors
are designed to operate for a maximum of 150
hours in reverse, but as a reverse rotation situation can go unnoticed for longer periods, phase
monitors are recommended. For compressors
MLZ / MLM 048 and larger, phase monitors are required for all applications. Danfoss recommends
phase protection for residential compressors.
•If the internal overload protector trips out, it must
cool down to 60°C / 140°F to reset. Depending on
ambient temperature, this may take up to several
hours.
11 – Check with running compressor
Check current draw and voltage. Measurement
of amps and volts during running conditions must
be taken at other points in the power supply, not in
the compressor electrical box.
•Check suction superheat to reduce risk of slugging.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Observe the oil level in the sight glass (if provided) for about 60 minutes to ensure proper oil
return to the compressor.
•Respect the operating limits.
•Check all tubes for abnormal vibration. Movements in excess of 1.5 mm / 0.06 in require corrective measures such as tube brackets.
•When needed, additional refrigerant in liquid phase
may be added in the low-pressure side as far as possible from the compressor. The compressor must be
operating during this process.
•Do not overcharge the system.
•Never release refrigerant to atmosphere.
•Before leaving the installation site, carry out a
general installation inspection regarding cleanliness, noise and leak detection.
•Record type and amount of refrigerant charge as
well as operating conditions as a reference for future inspections.
12 – Maintenance
Internal pressure and surface temperature are
dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed
100°C / 212°F and can cause severe burns.
Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.
To prevent system related compressor problems, following periodic maintenance is recommended:
•Verify that safety devices are operational and properly set.
•Ensure that the system is leak tight.
•Check the compressor current draw.
•Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
•Check that all electrical connections are still adequately fastened.
•Keep the compressor clean and verify the absence of rust and oxidation on the compressor shell,
tubes and electrical connections.
•Acid / moisture content in system and oil should
be checked regularly.
13 - Warranty
Always transmit the model number and serial number with any claim filed regarding this product.
The product warranty may be void in following
cases:
•Absence of nameplate.
•External modifications; in particular, drilling, welding, broken feet and shock marks.
•Compressor opened or returned unsealed.
•Rust, water or leak detection dye inside the compressor.
•Use of a refrigerant or lubricant not approved by
Danfoss.
•Any deviation from recommended instructions pertaining to installation, application or maintenance.
•Use in mobile applications.
•Use in explosive atmospheric environment.
•No model number or serial number transmitted
with the warranty claim.
14 – Disposal
Danfoss recommends that compressors
and compressor oil should be recycled by
a suitable company at its site.
4
INSTRUCTIONS
MLZ / MLM COMPRESSORS
A:
B:
C:
D:
E:
F:
G:
Model number
Technical number
Serial Number
Internal protection
Supply voltage range
Run capacitor
Locked rotor current
Maximum operating current
H: Lubricant type and nominal charge
I: Approved Refrigerant
J: Manufacturing year
Instructions
C
E
F
G
H
I
D
J
A
B
Installation and servicing of the
compressor by qualified personnel
only. Follow these instructions and sound
refrigeration engineering practice relating to
installation, commissioning, maintenance and
service.
Cond. Temp. (°C)
Operating limits
MLZ - R404A / R507
65
60
55
50
45
40
35
30
25
20
15
10
5
-35
Electrical connections
Single phase
N

L₁
PSC wiring
C
Thermostat
IOL
RGT: 18°C
S
Run capacitor
-30
-25
-20
-15
-10
-5
Evap. Temp. (°C)
0
5
10
Quick connect
spade terminals
Quick connect
spade
terminals
P terminal box type
P terminal box type
15
 : For transient conditions
MLZ - R134a
N
C
5
2
70
65
S
T₂
60
Cond. Temp. (°C)
CSR wiring
Start Relay
Thermostat
C
T₁
75
L₁
R
55
SH: 11K
50
Run capacitor
R
T₃
45
40
S
1
R
15 kΩ -1 w
Start capacitor
35
30
Three phase (Wiring diagram with pump-down cycle)
25
20
15
-20
-15
-10
-5
0
5
Evap. Temp. (°C)
10
15
Ring connectscrew
screw terminals
Ring connect
terminals
C terminal box type
C terminal box type
20
Cond. Temp. (°C)
MLZ / MLM - R22
70
65
60
55
50
45
40
35
30
25
20
15
10
-35
L1
L3
L2
Q1
F1
KM
KA
KM
KA
KS
KA
PM
A1
T1
SH: 11K
T2
A3
KS
RGT: 25°C
180 s
push
HPs
T3
A2
TH
LP
KS
M
DGT
KM
-30
-25
-20
-15
-10
-5
Evap. Temp. (°C)
0
5
10
KA
LLSV
KS
push
15
Wiring diagram with pump-down cycle
1 – Introduction
These instructions pertain to the MLZ / MLM scroll compressors used for refrigeration systems. They provide
necessary information regarding safety and proper
usage of this product.
2 – Handling and storage
•Handle the compressor with care. Use the dedicated handles in the packaging. Use the compressor lifting lug and use appropriate and safe lifting
The compressor is delivered
under nitrogen gas pressure
(between 0.3 and 0.4 bar / 4 and
6 psi). Do not disassemble bolts,
plugs, fittings, etc... unless
all pressure has been relieved
from the compressor.
Under all circumstances,
the EN378 (or other applicable
local safety regulation) requirements must be fulfilled.
Wear protective goggles and
work gloves.
equipment.
•Store and transport the compressor in an upright
position.
•Store the compressor between -35°C and 70°C /
-31°F and 158°F.
•Don’t expose the compressor and the packaging
to rain or corrosive atmosphere.
3 – Safety measures before assembly
Never use the compressor in a flammable atmosphere.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Use clean and dehydrated system components.
•The piping connected to the compressor must be
flexible in 3 dimensions to dampen vibrations.
•The compressor must always be mounted with the
rubber grommets supplied with the compressor.
4 – Assembly
•Slowly release the nitrogen holding charge
through discharge and suction ports.
•Connect the compressor to the system as soon as
possible to avoid oil contamination from ambient
moisture.
•Avoid material entering into the system while cutting tubes. Never drill holes where burrs cannot
be removed.
•Braze with great care using state-of-the-art technique and vent piping with nitrogen gas flow.
•Connect the required safety and control devices.
When the schrader port, if any, is used for this, remove the internal valve.
•For parallel assemblies of the compressors in version C8, contact Danfoss.
5 – Leak detection
Never pressurize the circuit with oxygen or dry
air. This could cause fire or explosion.
•Do not use leak detection dye.
•Perform a leak detection test on the complete system.
•The low side test pressure must not exceed 31 bar
/450 psi.
•When a leak is discovered, repair the leak and repeat the leak detection.
6 – Vacuum dehydration
•Never use the compressor to evacuate the system.
•Connect a vacuum pump to both the LP & HP sides.
•Pull down the system under a vacuum of
500 µm Hg (0.67 mbar) / 0.02 inch Hg absolute.
•Do not use a megohmmeter nor apply power to
the compressor while it is under vacuum as this
may cause internal damage.
F1
push
Never operate
The compressor must only be used
for its designed purpose(s) and within compressor without
its scope of application (refer to «ope- terminal box cover
rating limits»). Consult Application in place and secured.
guidelines and datasheet available
from cc.danfoss.com
3
CONTROL CIRCUIT
MLZ / MLM
The compressor must
be handled with caution
in the vertical position
(maximum offset from
the vertical : 15°).
•Mount the compressor on a horizontal flat surface with less than 7° slope.
•Verify that the power supply corresponds to the compressor motor characteristics (see nameplate).
•When installing a compressor for R404A,R507or
R134a, use equipment specifically reserved for HFC
refrigerants which was never used for CFC or HCFC
refrigerants.
•Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material.
7 – Electrical connections
•Switch off and isolate the main power supply.
•All electrical components must be selected as per
local standards and compressor requirements.
•Refer to page 3 for electrical connections details.
For three phase applications, the terminals are
labeled T1, T2, and T3. For single-phase applications the terminals are labeled C (common), S
(start), and R (run).
•Danfoss scroll compressors will only compress
gas while rotating counter-clockwise (when
viewed from the compressor top). Since singlephase motors will start and run in only one direction, reverse rotation is not a major consideration. Three-phase motors, however, will start and
run in either direction, depending on the phase
angles of the supplied power. Care must be taken
during installation to ensure that the compressor
operates in the correct direction.
•Use ø 4.8 mm / #10 - 32 screws and ¼” ring terminals
for the power connection with ring connect screw terminal (C type). Fasten with 3 Nm torque.
•Use ø 6.3 mm tabs for quick connect spade terminals (P type).
•Use a self tapping screw to connect the compressor to earth.
8 – Filling the system
•Keep the compressor switched off.
•Keep the refrigerant charge below the indicated
charge limits if possible. Above this limit; protect the
compressor against liquid flood-back with a pumpdown cycle or suction line accumulator.
•Never leave the filling cylinder connected to the circuit.
Compressor models
MLZ / MLM015-019-021-026
MLZ / MLM030-038-045-048
MLZ / MLM058-066-076
Refrigerant
charge limit
3.6 kg / 8 lb
5.4 kg / 12 lb
7.2 kg / 16 lb
9 – Verification before commissioning
Use safety devices such as safety pressure
switch and mechanical relief valve in compliance
with both generally and locally applicable regulations and safety standards. Ensure that they are
operational and properly set.
Check that the settings of high-pressure switches don’t exceed the maximum service pressure
of any system component.
•A low-pressure switch is recommended to avoid
low pressure operation.
Minimum setting for R22
1.5 bar (absolute) / 22 psia
Minimum setting for R404A 2.4 bar (absolute) / 35 psia
Minimum setting for R134a 1.45 bar (absolute) / 21 psia
•Verify that all electrical connections are properly
fastened and in compliance with local regulations.
•When a crankcase heater is required, it must be
energized at least 24 hours before initial start-up
and start-up after prolonged shutdown.
10 – Start-up
•Never start the compressor when no refrigerant is
charged.
•Do not provide any power to the compresor
unless suction and discharge service valves are
open, if installed.
•Energize the compressor. It must start promptly.
If the compressor does not start, check wiring
conformity and voltage on terminals.
•Eventual reverse rotation can be detected by following phenomena; the excessive noise, no pressure differential between suction and discharge,
and line warming rather than immediate cooling.
A service technician should be present at initial
start-up to verify that supply power is properly
phased and that the compressor is rotating in the
correct direction. MLZ / MLM Scroll compressors
are designed to operate for a maximum of 150
hours in reverse, but as a reverse rotation situation can go unnoticed for longer periods, phase
monitors are recommended. For compressors
MLZ / MLM 048 and larger, phase monitors are required for all applications. Danfoss recommends
phase protection for residential compressors.
•If the internal overload protector trips out, it must
cool down to 60°C / 140°F to reset. Depending on
ambient temperature, this may take up to several
hours.
11 – Check with running compressor
Check current draw and voltage. Measurement
of amps and volts during running conditions must
be taken at other points in the power supply, not in
the compressor electrical box.
•Check suction superheat to reduce risk of slugging.
FRCC.PI.006.A2.22 © Danfoss Commercial Compressors 04/10
•Observe the oil level in the sight glass (if provided) for about 60 minutes to ensure proper oil
return to the compressor.
•Respect the operating limits.
•Check all tubes for abnormal vibration. Movements in excess of 1.5 mm / 0.06 in require corrective measures such as tube brackets.
•When needed, additional refrigerant in liquid phase
may be added in the low-pressure side as far as possible from the compressor. The compressor must be
operating during this process.
•Do not overcharge the system.
•Never release refrigerant to atmosphere.
•Before leaving the installation site, carry out a
general installation inspection regarding cleanliness, noise and leak detection.
•Record type and amount of refrigerant charge as
well as operating conditions as a reference for future inspections.
12 – Maintenance
Internal pressure and surface temperature are
dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed
100°C / 212°F and can cause severe burns.
Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.
To prevent system related compressor problems, following periodic maintenance is recommended:
•Verify that safety devices are operational and properly set.
•Ensure that the system is leak tight.
•Check the compressor current draw.
•Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
•Check that all electrical connections are still adequately fastened.
•Keep the compressor clean and verify the absence of rust and oxidation on the compressor shell,
tubes and electrical connections.
•Acid / moisture content in system and oil should
be checked regularly.
13 - Warranty
Always transmit the model number and serial number with any claim filed regarding this product.
The product warranty may be void in following
cases:
•Absence of nameplate.
•External modifications; in particular, drilling, welding, broken feet and shock marks.
•Compressor opened or returned unsealed.
•Rust, water or leak detection dye inside the compressor.
•Use of a refrigerant or lubricant not approved by
Danfoss.
•Any deviation from recommended instructions pertaining to installation, application or maintenance.
•Use in mobile applications.
•Use in explosive atmospheric environment.
•No model number or serial number transmitted
with the warranty claim.
14 – Disposal
Danfoss recommends that compressors
and compressor oil should be recycled by
a suitable company at its site.
4