24
Direct-Fired Make-up Air •
MUA-SVX01A-EN
Weights and Clearances
DFOA Only
Note 3.
When a mixing box option is ordered, the Inlet Damper, V-Bank Filter and Return Air accessory weights,
must be totaled.
Note 4.
2 Contact the factory for shipping weights on models exceeding 50,000 CFM.
Service Clearance
•
A three-foot clearance is required on all sides for single and dual fan units
(sizes 215-230). Refer to Table 4 for minimum combustable clearances.
•
To permit blower shaft replacement, the side opposite of the controls should
have a clearance equal to the width of the unit.
Figure 5.
Plan View DFOA Unit
Table 3.
DFOA Weights in pounds (approximate)
Unit
Size
Blower
Section
Vertical
Support
Stand
Inlet
Hood
Inlet
Damper
V-
Bank
Filter
Burner
Section
Return
Air
Discharg
e Louver
A
B
C
D
109
350
180
140
55
165
260
104
70
67
149
67
67
112
350
180
140
55
165
260
104
70
67
149
67
67
115
535
210
150
70
185
375
116
80
94
253
94
94
118
535
210
150
70
185
375
116
80
94
253
94
94
120
916
420
183
120
275
550
151
110
159 439 159
159
122
916
420
183
120
275
550
151
110
159 439 159
159
125
1262
570
216
155
310
700
208
125
224 590 224
224
130
1262
570
216
155
310
700
208
125
224 590 224
224
215
912
500
224
125
275
510
141
150
158 438 158
158
218
912
500
224
125
275
510
141
150
158 438 158
158
220
1501
625
290
233
410
725
226
215
268 697 268
268
222
1501
625
290
233
410
725
226
215
268 697 268
268
225
2117
845
350
340
500
1010
302
230
388 953 388
388
230
2117
845
350
340
500
1010
302
230
388 953 388
388
Unit
Discharge
Damper
V
-Bank Filter
Inlet Damper
Inlet Hood
Discharge
Louver
B
C
A
D
