Install Instructions

10
I-UBX-UBZ-UDX-UDZ (04-21) 1034344-0
Clearances
Units must be installed so that the clearances listed in Table 6 are provided for with regards to combustion air space,
inspection, and service and for proper spacing from combustible construction. Clearance to combustibles is defined
as the minimum distance from the heater to a surface or object for which it is necessary to ensure that a surface
temperature of 90°F (50°C) above the surrounding ambient temperature is not exceeded. Refer to the dimensions
listed in Table 4 and Table 5 and shown in Figure 2 and Figure 3 when determining clearances to combustibles.
Table 5. Dimensions—Models UDX and UDZ
Unit
Size
Dimension (See Figure 3)
A B C D E F G H J K M N P Q R S T
Inches (±1/16) (mm (±2))
030,
045
13-3/4
(349)
27
(686)
10
(254)
13-13/16
(351)
29-3/4
(756)
25-9/16
(649)
6
(152)
5-15/16
(151)
3-1/2
(89)
3-11/32
(85)
17-3/8
(441)
1-9/16
(40)
4-9/32
(109)
13
(330)
9-9/16
(243)
3-3/4
(95)
2-15/16
(75)
060
16-3/4
(425)
27
(686)
13
(330)
13-13/16
(351)
32-23/32
(831)
25-9/16
(649)
8-11/16
(221)
5-15/16
(151)
6
(152)
3-11/32
(85)
17-3/8
(441)
1-9/16
(40)
4-9/32
(109)
13
(330)
9-9/16
(243)
4-1/16
(103)
2-15/16
(75)
075
16-3/4
(425)
27
(686)
13
(330)
13-13/16
(351)
31-29/32
(810)
25-9/16
(649)
8-11/16
(221)
5-15/16
(151)
6
(152)
3-11/32
(85)
17-3/8
(441)
1-9/16
(40)
4-9/32
(109)
13
(330)
9-9/16
(243)
4-1/16
(103)
2-15/16
(75)
100
24-3/4
(629)
27
(686)
21
(533)
13-13/16
(351)
34-9/32
(871)
25-9/16
(649)
15-5/16
(389)
5-15/16
(151)
8-29/32
(226)
3-11/32
(85)
17-3/8
(441)
1-9/16
(40)
4-9/32
(109)
13
(330)
9-9/16
(243)
5-15/32
(139)
2-15/16
(75)
125
24-3/4
(629)
27
(686)
21
(533)
13-13/16
(351)
34-9/32
(871)
25-9/16
(649)
15-5/16
(389)
5-15/16
(151)
8-29/32
(226)
3-11/32
(85)
17-3/8
(441)
1-9/16
(40)
4-9/32
(109)
13
(330)
9-9/16
(243)
5-15/32
(139)
2-15/16
(75)
150,
175,
200
20-1/8
(511)
38-3/16
(970)
16
(406)
23
(584)
48-7/16
(1230)
40
(1016)
9-5/8
(244)
8-5/16
(211)
5-3/8
(137)
6-1/2
(165)
25-11/16
(652)
1-13/32
(36)
8-1/8
(206)
22-3/16
(564)
16-3/8
(416)
5-1/2
(140)
4-1/4
(108)
225,
250
26-1/8
(664)
38-3/16
(970)
22
(559)
23
(584)
48-7/16
(1230)
40
(1016)
13-1/16
(332)
8-5/16
(211)
9
(229)
6-1/2
(165)
25-11/16
(652)
1-13/32
(36)
8-1/8
(206)
22-3/16
(564)
16-3/8
(416)
8-1/16
(205)
4-5/16
(110)
300,
350,
400
34-1/8
(867)
41
(1041)
30
(762)
23
(584)
48-29/32
(1243)
40
(1016)
17-1/16
(433)
8-1/2
(216)
11-
13/16
(300)
7-5/16
(186)
27-11/16
(703)
1-13/32
(36)
8-1/8
(206)
22-3/16
(564)
16-1/4
(413)
11-9/16
(294)
4-1/2
(114)
GENERAL INFORMATION—CONTINUED
Dimensions—Continued
Table 6. Clearances to Combustibles
Heater
Surface
Unit Size
030–125 150–400
Minimum Clearance (Inches (mm))
Top 1 (25) 4 (102)
Flue connector 6 (152) 6 (152)
Access panel 18 (457) 18 (457)
Non-access side 1 (25) 2 (51)
Bottom*
1 (25) 1 (25)
Rear**
18 (457) 18 (457)
*Suspend the heater so that the bottom is a minimum of 5 feet (1.5 meters) above the floor.
**Measure rear clearance from the fan motor.
Weights
⚠ WARNING ⚠
Check the supporting structure to be used to verify that it has sufficient load carrying capacity to
support the weight of the unit. Suspend the heater only from the threaded nut retainers or with a
manufacturer-provided kit. Do NOT suspend from the heater cabinet.
NOTE: For unit shipping weight, contact an authorized Factory Distributor.
Before suspending the heater, ensure that the supporting structure to be used has sufficient load-carrying capacity
to support the weight (refer to Table 7) of the unit.