Manage operating envelope
R22, R410A
Model variation U
20
25
30
35
40
45
50
55
60
65
70
-30
-25
-20
-15
-10
-5
0
5
10
15
Evaporating temperature (°C)
Condensing temperature (°C)
SH 11K
R22
R407C
R410A
Working pressure range high side
bar (g)
10.9 - 27.7
10.5 - 29.1
15.8 - 44.5
Working pressure range low side
bar (g)
1.4 - 6.9
1.1 - 6.4
1.9 - 10.8
Maximum high pressure safety switch setting*
bar (g)
29
30
45
Minimum low pressure safety switch setting
bar (g)
0.5
0.5
1.5
Minimum low pressure pump-down switch setting**
bar (g)
1.5
1.3
2.3
*
Maximum allowable pressure on high pressure side according to PED regulation.
** Recommended pump-down switch settings: 1.5 bar (R22,R407C) and 2.5 bar (R410a) below nominal evap.
R
LP and HP safety switches must never
be bypassed nor delayed and must stop all the
compressors.
When caused low by LP safety switch, limit the
number of auto-restart to maximum 5 times
within 12 hours.
HP safety switch must be manual reset
Depending on application operating envelope,
you must define HP and LP limits within
operating envelope and pressure setting table
above.
For H-series compressors, the external Discharge
Gas Temperature protection (DGT) is required
if the high and low pressure switch settings do
not protect the compressor against operations
beyond its specific application envelope.
The discharge gas thermostat accessory kit (code
7750009) includes all components required
for installation as shown on the right. DGT
installation must respect below requirements:
• The thermostat must be attached to the
discharge line within 150 mm from the
compressor discharge port and must be
thermally insulated and tightly fixed on the pipe.
• The DGT should be set to open at a discharge
gas temperature of 135°C.
Discharge line
Insulation
Bracket
Thermostat
29
FRCC.PC.012.A7.02
GENER
AL INFORM
ATION
PR
ODUC
T INFORM
ATION
INTEGR
ATION INT
O SY
STEM
ORDERING INFORM
ATION
SY
STEM DESIGN