Reznor UBX Manual

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Revision: UBX-UBZ-UDX-UDZ-HX (02-22) 1037154-0

HEAT EXCHANGER GASKET KIT INSTALLATION

FOR UNIT HEATERS

Supersedes: — (Original Version)

MODELS UBX, UBZ, UDX, AND UDZ

Table 1. Heat Exchanger Gasket Kit Components

Item

No.*Component Size

Unit Size

030, 045 060, 075 100, 125 150, 175, 200 225, 250 300, 350, 400

Kit PN

1036360 1036361 1036362 201670 201671 201672

Component PN (Quantity)

1Top/bottom header

panel gasket

5/8 × 21-3/8 1033925 (2) 1033925 (2) 1033925 (2) —

1 × 35-23/64 — 194533 (2) 194533 (2) 194533 (2)

2Front/rear heater

panel gasket

5/8 × 12-5/8 1033922 (2) —

—5/8 × 15-5/8 — 1033923 (2) —

5/8 × 23-5/8 — 1033924 (2)

1 × 20-3/16

—

195986 (2) —

1 × 26-3/16 — 195987 (2) —

1 × 34-3/16 — 195988 (2)

3Tube support

gasket

1 × 89-7/32 201424 (1) —

1 × 95-7/32 — 201425 (1) —

1 × 103-7/32 — 201426 (1)

*See Figure 1.

INSTALLATION

⚠ DANGER ⚠

• Improper installation could result in death, serious injury, and /or property damage.The qualiﬁed

agency performing this work assumes responsibility for this installation.

• Proper installation and sealing of the heat exchanger to the heater is necessary for reliable and

safe operation. Failure to properly install could result in property damage, personal injury, and/

or death.

• The replacement heat exchanger should be installed by a qualiﬁed service agency in compliance

with all codes and requirements of authorities having jurisdiction.

NOTE: Unit sizes 030–125 require the installation of four (4) gasket strips. Unit sizes 150–400 re-

quire the installation of ﬁve (5) gasket strips.

Install the heat exchanger gasket kit as follows (item numbers refer to Figure 1):

•To prevent damage during shipping or storage, gasket kits for replacement heat exchangers are shipped in a

parts bag.

•Gasket kits should be attached to the replacement heat exchanger at the time of installation.

•All gaskets are self-adhesive and are cut to size.

•Refer to the installation manual provided with the heater for important safety information.

•Ensure that all components listed in Table 1 are available before beginning installation.

Speciﬁcations and illustrations subject to change without notice or incurring obligations.

Latest version of this manual is available at www.reznorhvac.com.

©2022 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved.

UBX-UBZ-UDX-UDZ-HX (02-22) 1037154-0

INSTALLATION—CONTINUED

Figure 1. Heat Exchanger Gasket Locations (Refer to Table 1)

1. Install header panel gaskets:

NOTE: The header panel gaskets are sealing gaskets and must cover the full length of the surface.

a. Position top/bottom (1) and front/rear (2) gaskets on outer edges of header panel and align holes—ignore

large holes in bottom gasket.

b. To apply gasket(s), start at end and gradually peel backing from gasket as it is adhered. Repeat with each strip.

2. Install tube support gasket (unit sizes 150–400):

NOTE: The tube support gasket is required to prevent vibration but is not a sealing gasket.

a. Position tube supprt gasket (3) across top, rear, and bottom of tube support.

b. To apply gasket, start at end and gradually peel backing from gasket as it is adhered.

3. Complete replacement heat exchanger installation (refer to installation manual provided with heater):

a. Inspect and clean cabinet, burner, and vent system.

a. Replace any components that are not structurally sound.

4. When installation of replacement heat exchanger is complete, start up heater (refer to installation manual

provided with heater):

a. Follow instructions on lighting instruction plate to restart heater.

b. CHECK ALL SAFETY FEATURES FOR PROPER OPERATION.

UNIT SIZES 030–125 UNIT SIZES 150–400

1

1

2

2

2

3

1

1

2