Reznor EXUB Unit Installation Manual - Manual (Page 5)

5
— WARNING! —
Read and follow the instructions in this manual. Failure to do so may result in severe or fatal injury.
— INSTALLATION —
Mechanical
Location
Please follow guidelines below for optimum heating results:
1. Do not install heaters such that airflow is blocked or impeded by equipment or walls.
2. For occupant comfort, position heaters so that air discharge is directed across areas of highest heat loss,
such as doors, windows, and outside walls.
3. For large areas, arrange heaters such that the air discharge of one heater is directed towards the inlet of the
next heater. This sets up a rotational airflow with air circulation in the central area of the building.
4. For equipment freeze protection, direct air discharge at equipment.
5. For large workshops or warehouses it may be acceptable to use fewer, larger heaters.
6. Locate remote mount room thermostat on interior partition walls or posts away from cold drafts, internal heat
sources, and away from heater discharge air streams.
Mounting
1. A variety of mounting brackets are available from the factory to aid in installation.
2. The heater is designed to be installed in an upright and level position. All models should not be more than
±15 degrees or 2.5 in. (63.5 mm) from level when measured front-to-back, and ± 5 degrees 1.7 in. (43.2
mm) on 5 to 10 kW models, 2.0 in. (50.8 mm) on 15 to 20 kW models, and 2.4 in. (60.9 mm) on 25 to 35 kW
models from level when measured side-to-side. Failure to comply will cause high limit shut down. Refer to
heater data plate for tilt angles.
3. If using mounting hardware or a supporting structure not supplied by the factory, the unit should be
suspended through the four 9/16 in. (14 mm) mounting holes on top of the unit with 1/2 in. UNC bolts.
Lock washers should be used on all mounting nuts and bolts to ensure they don’t vibrate or work loose
due to fan vibration or other vibration transmitted to the heater. If in doubt consult factory.
4. It is essential that adequate structural support be provided for installation. The mounting structure must
be strong enough to support the heaters weight, provide sufficient stiffness to prevent excessive
vibration, and withstand all probable abusive situations such as transportable installations where truck off-
loading impacts, etc. may occur. Refer to table on Page 3, EXUB Specifications by Model Size, for heater
net weights.
Mounting Heights and Clearances
1. To ensure that warm air reaches the floor observe the recommended maximum mounting heights in table
on Page 3, EXUB Specifications by Model Size. Heaters may be mounted at higher elevations and still pro-
vide warm air at floor level however, the maximum mounting elevation at which this occurs depends on lo-
cation and operational conditions.
2. Louvers may be adjusted to provide greater downward deflection of the discharge air. However, louvers
must not be set less than 30 degrees of the closed position.
3. Leave at least 10 in. (254 mm) clearance between the rear of the motor and the nearest obstruction.
4. For easy removal of the core, leave clearance beneath the heater equal to the height of the heater cabinet
plus 2 in. (51 mm).