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11
Fig. 9 —
28MK (Humidifier) Nomenclature
Fig. 10 —
39MG Gas-Fired Furnace Nomenclature
2
8
MK M R
S
XXXXXXXXXX –
2
8
MK
– H
u
midifier
3
9M Unit
S
ize
Code
S
ize
B –
0
3
C –
06
D –
0
8
F –
10
G –
12
H –
14
J –
17
K –
21
L –
25
Frame Material
S
–
S
t
a
inle
ss
S
teel
Hand
R –
Right
L –
Left
Revi
s
ion Level
– C
u
rrent Revi
s
ion
XXXXXXXXXX
– Alw
a
y
s
M –
3
0
N –
3
6
P –
40
Q –
50
R –
61
S
–
72
T –
8
5
V –
96
W –
110
39MG C 11 M B B S1 N B G XX –
39MG
– Gas Heat
39M Unit Size
C
– 06W
D
Carrier Gas Heat Code
11-35
– Duct Furnaces
36-62, 70
– Rack Furnaces
Control Signal
B
– 0-10 VDC
XX
–
Always
Unit Exterior
G
– Galvanized
P
– Pre-Paint
C
HX Tube Construction
(Type Steel)
B
– 409 SS HX-Galv. Frame
– 304 SS HX-Galv. Frame
Revision Level
Electric Power
B
– 120/1/60
Sequence
Fuel Type
S1
C1
H2
H3
H4
H5
H6
H7
F
G
H
J
K
L
– 08W
– 10W
– 12W
– 14W
– 17W
– 21W
– 25W
M
– 30W
N
P
Q
R
S
T
V
– 36W
– 40W
– 50W
– 61W
– 72W
– 85W
– 96W
W
– 110W
M
S
– Master
– Slave
N
– Natural Gas
L
– Propane
– 0-2000/USA
– 0-4500/Canada
– 2001-3000/USA
– 3001-4000/USA
– 4001-5000/USA
4501-5000/Canada
– 5001-6000/USA and Canada
– 6001-7000/USA and Canada
– 7000 and up/USA and Canada
Altitude and Country
HX
—
Heat Exchanger