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I-UEZ (04-21) 1034347-0
Table 5. Clearances to Combustibles
HeaterSurface Minimum Clearance (Inches (mm))
Top 4 (102)
Flue connector 6 (152)
Access panel 18 (457)
Non-access side 2 (51)
Bottom*
1 (25)
Rear**
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 6) of the unit.
Venting and Combustion Air Requirements
• All separated-combustion units MUST BE equipped with both combustion air and exhaust piping to the outdoors.
The unique concentric adapter box required with this heater allows for both combustion air and exhaust piping
with only one horizontal or vertical penetration hole in the building.
• Concentric horizontal and vertical vent/combustion air systems (option CC6 or CC2) are the only venting/combustion
air systems approved for this heater.
• These units are certified as Category IV heaters. These heaters are very thermal efficient and will produce
condensate during operation.
Vent/Combustion Air System Piping Requirements
• Types of pipe: provide field-supplied pipe in the following types:
• Vent pipe: schedule 40 PVC or CPVC pipe—in Canada, all PVC vent pipe must be approved to ULC 636.
• Combustion air inlet pipe: sealed, single-wall galvanized pipe is recommended.
• Venter outlet and combustion air inlet: located at rear of heater (see Figure 3).
Table 6. Unit Weights
Unit Size
130 180 260 310
Pounds (kg)
230 (104) 245 (111) 360 (163) 395 (179)
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