Page 10 of 84
2.3 - Unit Nomenclature Example, Cont.
PR Series Installation, Operation, and Maintenance Manual
Digit:
Description:
Feature:
12
Vintage
D = Current
13
Airflow Orientation
A = Vertical supply and vertical return
B = Horizontal supply and vertical return
C = Vertical supply and side return
D = Horizontal supply and side return
E = Vertical supply and no return
F = Horizontal supply and no return
20
Compressor Type
0 = None
1 = Single Scroll/Single Circuit
2 = Dual Scroll/Dual Circuit
3 = Single Digital Scroll/Single Circuit (17.5 Tons and Below)
4 = Single Digital Scroll and Single Scroll/Dual Circuit
6 = Dual Scroll/Dual Circuit Lead VFD (17.5 Tons and Above)
22 - 23
Refrigeration Options
00 = None
AE = Hot Gas Bypass (Lead Circuit)
AF = Hot Gas Bypass (Lag Circuit)
AG = Hot Gas Bypass (Dual Circuit)
AK = Hot Gas Reheat, Modulating (Single Circuit)
AL = Hot Gas Reheat, Modulating (Dual Circuit)
AM = Liquid Subcooling, Switchable, All Circuits
DB = AE + AK
DV = AE + AL
DC = AE + AM
DT = AF + AK
DW = AF + AL
DZ = AF + AM
DU = AG + AK
DX = AG + AL
EU = AG + AM
DE = AK + AM
FB = AE + AK + AM
FJ = AF + AK + AM
FK = AG + AK + AM
24
Heating Type
0 = None
A = Electric Heat
B = Natural Gas Heat
D = LP Gas Heat
F = Hot Water Heat
G = Electric Pre-Heat
H = B + G
J = D + G
K = F + G
