Page 12 of 84
PR Series Installation, Operation, and Maintenance Manual
2.3 - Unit Nomenclature Example, Cont.
Digit: Description: Feature:
28 Heater Control
0 = None
1 = 1 Stage
2 = 2 Stage
3 = 4 Stage
9 = 8 Stage
4 = SCR (N/A 5kW)
6 = Modulating 5:1 NG, 3:1 LPG
7 = Modulating 10:1 NG, 6:1 LPG
8 = Modulating 20:1 NG, 12:1 LPG
30 Energy Recovery
0 = None
B = ECW 324+2” 30/30 Filter
C = ECW 364+2” 30/30 Filter
D = ECW 424+2” 30/30 Filter
E = ECW 484+2” 30/30 Filter
F = ECW 544+2” 30/30 Filter
G = ECW 604+2” 30/30 Filter
J = ECW 606+2” 30/30 Filter
K = ECW 664+2” 30/30 Filter
L = ECW 666+2” 30/30 Filter
M = ECW 706+2” 30/30 Filter
N = ECW 724+2” 30/30 Filter
P = ECW 726+2” 30/30 Filter
Q = ECW 784+2” 30/30 Filter
R = ECW 786+2” 30/30 Filter
S = ECW 7812+2” 30/30 Filter
T = ECW 844+2” 30/30 Filter
U = ECW 846+2” 30/30 Filter
V = ECW 8412+2” 30/30 Filter
31 Energy Recovery Options
0 = None (No ECW)
A = On/O Defrost
B = VFD Temp Defrost
C = Bypass
D = A + C
E = B + C
F = Standard Control
G = C + F
H = VFD (Used only with CBO’s)
J = C + H
38 - 39 Corrosion Protection
00 = None
A1 = Cabinet
F1 = Condenser Coils
G1 = CuproNickel Water Coil
H1 = Internal Coils
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