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unit and accessorY dimensions
mdB/mrB 220-230 dimensions
C L
C-3
2
C L
S
6
BLOWER
MOTOR
T
B + 6
B + 3
G
B
GAS MANIFOLD
COMPARTMENT
C L
SERVICE ACCESS
DOORS BOTH SIDES
PIPING COMPARTMENT
LOUVERS
VENT CONNECTION
C
2
GAS CONNECTION
A
1 1/16
6
S
"DETAIL A"
CASING
BASE PAN
BASE FRAME
13/16
4
1/8
3
3 1/2
1 1/16
BASE O.D.
CASING O.D.
table 36.1 - Filter Quantity / size (inches)
SIZE
FILTERS IN HOOD
220
(15) 20 x 25 x 2
222
225
(6) 16 x 25 x 2
(18) 20 x 25 x 2
230
table 36.2 - mdB / mrB unit dimensions (all dimensions in inches)
SIZE
A
B
C
220
48
130
96
222
48
130
96
225
60
154
110
230
60
154
110
Note: All accessories shipped completely assembled for easy installation. Some accessories shipped separately. All data subject to change.
All dimensions subject to manufacturing tolerances.
36
C
(4) 1" DIA. LIFTING HOLES
L
F
D
R
L
D
F
FLAME
ELECTRICAL
VIEWPORT
COMPARTMENT
UNIT
3/4
2 1/4
E
E
3
OPTIONAL THREE
SEE
WAY DISCHARGE
'DETAIL A'
LOUVER
U
1 1/2
M
1 1/2
FILTERS IN V-BANK
(20) 20 x 25 x 2
(36) 20 x 25 x 2
D
E
F
G
24
/
24
/
16
/
111
7
7
1
8
8
16
27
/
27
/
14
/
111
3
3
13
8
8
16
31
/
31
/
18
/
135
3
3
13
8
8
16
36
/
36
/
16
/
135
7
7
1
8
8
16
1 1/2
1 1/2
P
Q
L
P
1 1/2
1 1/2
OPTIONAL
DISCHARGE
DAMPER
1 1/2
MODELS 225-230
M
INLET HOOD IS
TWO SECTIONS
1 1/2
21 1/4
24
OPTIONAL FILTER
ARRANGEMENT
N
H
J
K
L
M
2
/
2
/
1
/
88
31
11
1
3
16
2
4
2
/
2
/
1
/
88
31
11
1
3
16
2
4
2
/
2
2
/
110
42
3
1
8
4
2
/
2
2
/
110
42
3
1
8
4
7-500.10
SECOND DAMPER MOTOR
2
J
B
B
B + 6
2
J
OPTIONAL
INLET HOOD
OPTIONAL
WITH BIRDSCREEN
INLET
DAMPER
1 1/16
1 1/16
K
A
A
A
1 1/16
K
9
1 1/16
N
P
Q
R
45
/
28
/
28
32
/
3
1
1
8
2
8
45
/
28
/
28
29
/
3
1
5
8
2
8
56
38
/
30
37
/
1
5
2
8
56
38
/
30
32
/
1
1
2
8
FILTER ACCESS
DOOR BOTH SIDES
OPTIONAL
V-BANK
FILTER
24
3
S
T
U
14
107
11
/
1
4
14
107
12
/
1
4
20
131
13
/
1
2
20
131
16
/
3
4
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