Instruction Manual
28 
Should overheating occur with a gas heat 
exchanger, or the gas supply fail to shut off, 
shut off the manual gas valve to the furnace 
before shutting off the electrical supply. 
Prolonged overheating of the heat exchanger 
will shorten its life. 
If  unit  has  not  been  selected  as  a  100% 
outside air unit (makeup air unit) the return 
air duct must  be  sealed to the unit and the 
return air temperature must be maintained 
between 55F and 80F. 
Table 1 - Electric and Gas Heating Capacities 
Model Option B2 
Gas Heat 
Electric Heat 
Input Capacity 
Output Capacity 
Capacity 
MBH 
MBH 
kW (208V) 
kW (230V, 
460V, 575V) 
1 = Heat 1 
60.0 
48.0 
7.5 
10 
2 = Heat 2 
90.0 
72.0 
15.0 
20 
3 = Heat 3 
100.0 
80.0 
22.5 
30 
4 = Heat 4 
270.0 
218.7 
30.0 
40 
5 = Heat 5 
140.0 
112.0 
37.5 
50 
6 = Heat 6 
390.0 
315.9 
45.1 
60 
7 = Heat 7 
160.0 
128.0 
60.1 
80 
8 = Heat 8 
405.0 
328.1 
75.1 
100 
9 = Heat 9 
90.1 
120 
A = Heat A 
120.1 
160 
B = Heat B 
150.2 
200 
C = Heat C 
540.0 
432.0 
180.2 
240 
D = Heat D 
810.0 
648.0 
210.3 
280 
E = Heat E 
1080.0 
864.0 
240.3 
320 
F = Heat F 
195.0 
156.0 
G = Heat G 
292.5 
234.0 
K = Heat K 
150.0 
120.0 
L = Heat L 
210.0 
168.0 
M = Heat M 
800.0 
640.0 
N = Heat N 
1600.0 
1280.0 
P = Heat P 
2400.0 
1920.0 










