Application guidelines
12
FRCC.PC.004.A9.22
Operating envelopes
MTZ – R407A at Dew Point
MTZ – R407F at Dew Point
150
80
-30
Condensing temperature (F)
Evaporating temperature (F)
90
100
110
120
130
140
-20
-10
0
10
20
30
40
50
60
RGT 68F
S.H. = 18F
150
80
-30
Condensing temperature (F)
Evaporating temperature (F)
90
100
110
120
130
140
-20
-10
0
10
20
30
40
50
60
RGT 68F
S.H. = 18F
Discharge temperature
protection
Even when the motor windings are protected
against overheating by the internal motor
protection, the compressor discharge gas
temperature could exceed the maximum allowed
value of 275°F when the compressor is operated
outside its application envelope. The most
effective protection against too high discharge
gas temperature is to mount a discharge
gas thermostat. An accessory kit is available
from Danfoss which includes the thermostat,
mounting bracket and insulation.
The thermostat must be attached to the
discharge line as indicated below at no more
than 5.90 inch from the discharge connection.
Thermostat
Insulation
Bracket
Discharge line