4
1 The first letter of the denomination (P, T, D, N, F, S or G) indicates compressor series
2 The second letter indicates motor protection placement.
3 E, Y, X, and U denote different energy optimization steps. S means semi-direct suction.
On all these mentioned types, the indicated suction connector has to be used. Using the wrong
connector as a suction connector will lead to reduced capacity and efficiency.
4 A number indicates the displacement in cm
3
, but for PL compressors, the number indicates the
nominal capacity.
5 The letter after the displacement indicates which refrigerant must be used as well as the field of
application for the compressor.
1.2
Denomination
Key to AC-Compressor Type Designation (P / T / D / N / F / S / G-Series)
1 2 3
Compressor
design
Protector location Optimization level
Internal External
PTC
LST
Relay
HST
PTC Relay Low < Standard > High
P
L
L
Blank
E
a)
Semi-direct
intake
T
T
F
E
b)
S
Y
a)/b)
X
a)
D
Semi-direct or direct intake
N
U
a)
F R
S C C E
Direct
intake
G S
Semi-direct
intake
L = Low
Blank =
Standard
S
= Semi-direct intake
E
= Energy-optimized
Y
= High energy-optimized +
X
= High energy-optimized ++
U
= High energy-optimized +++