Reznor UBX User Manual

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UEZ-IOM (07-23) 1034347-I
Figure 4. Connections at Rear of Unit—Unit Sizes 055–110 (Refer to Table 9)
TERMINAL STRIP
VENT PIPE
C
A
B
D
LINE VOLTAGE
ENTRANCE
GAS
CONNECTION
CONDENSATE DRAIN
COMBUSTION AIR PIPE COLLAR
DISCONNECT SWITCH
Table 9. Connection Sizes and Locations (Unit Sizes 055–110)
Dimension (See Figure 4)
or Connection
Unit Size
055 085 110
Dimension/Diameter (Inches (mm))
A 3-1/4 (83) 3-11/16 (94) 7-1/8 (181)
B 7-1/4 (184) 10-11/16 (271) 14-1/8 (359)
C 3-3/16 (81) 5-1/8 (130)
D 6 (152) 7-7/8 (200)
Combustion air pipe collar
2 (51)
PVC vent pipe
PVC condensate drain pipe 3/4 (19)
Vent/Combustion Air Piping Requirements (Unit Sizes 130–310)
NOTE: Concentric horizontal and vertical vent/combustion air systems (option CC6 or CC2) are the
only venting/combustion air systems approved for unit sizes 130, 180, 260, and 310. The unique
concentric adapter box required with this heater allows for both combustion air and exhaust pip-
ing with only one horizontal or vertical penetration hole in the building.
• Vent pipe: schedule 40 PVC or CPVC pipe or listed venting system of any type (polypropylene, metallic, etc.)—in
Canada, all vent pipe must be approved to ULC-636.
• Vent pipe clearance: do not install the vent piping near any high temperature steam lines, radiant heaters, or
other sources of heat.
• Vent piping size requirements: from heater to terminal end of vertical or horizontal vent (refer to Table 10).
• Combustion air inlet pipe: sealed, single-wall galvanized pipe is recommended.
• Combustion air piping size requirements: from heater to concentric adapter box and from concentric adapter
box to outdoors (refer to Table 10).
• Condensate drain connections: during operation, condensate is produced both in the heater and in the venting
system. Therefore, the installation requires a condensate drain from the secondary heat exchanger and from the
vent pipe. For safe performance of the heater, each condensate drain must include a trap. Install the condensate
drains in accordance with the Condensate Drain Installation section.
• Venter outlet and combustion air inlet: located at rear of heater (see Figure 5).

Reznor UBX Specifications

General

Brand	Reznor
Model	UBX
Category	Gas Heater
Language	English