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UBX-UBZ-UDX-UDZ-IOM (07-23) 1034344-K
Figure 6. Option CK8 or CK10 Hanger Kit
Suspension of Heater Using Option CK22 Hanger Kit
The ceiling suspension kit (option CK22) allows the heater to be installed 1 inch from the ceiling without hanger rods.
The ceiling suspension kit is used only on unit sizes 030–125 for UDX and UDZ models. Refer to the installation
instructions provided with the kit.
Heater Suspension Using Field-Supplied Threaded Rods
The heater may be suspended from 3/8-inch threaded rods using either two- (UDX/UDZ unit sizes 030–125) or
four-point suspension. The recommended maximum rod length is 6 feet (1.8 meters). The length of the threaded
rod extending into the heater MUST NOT exceed 1/2 inch (13 mm). Ensure that the threaded rods are locked to
the heater as shown in Figure 7.
Figure 7. Heater Suspension Using Field-Supplied Threaded Rods
Suspension of Heater with Downturn Nozzle
Ensure that any unit with a downturn nozzle (option CD2, CD3, CD4, or CD5) is installed using one of the above
FOUR-POINT suspension methods. Follow the instructions provided with the downturn nozzle kit.
Vent Connections
Refer to the model-specific venting manual listed in Table 1 for venting instructions.
Piping Connections
Gas Supply Pressure
The unit is equipped for a maximum gas supply pressure of 1/2 psi, 3.5 kPa, or 14 IN WC.
NOTES:
Supply pressure higher than 1/2 psi requires the installation of an additional service regulator
external to the unit.
PRESSURE TESTING SUPPLY PIPING
• Test pressures above 1/2 psi—disconnect the heater and manual valve from the gas supply line
to be tested. Cap or plug the supply line.
• Test pressures below 1/2 psi—before testing, close the manual valve on the heater.
ADD 3/8-INCH
NUT AND
WASHER TO
LOCK ROD
TO HEATER
3/8-INCH
THREADED ROD
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