Reznor SHH (Indoor PreevA) Unit Installation Manual - Manual (Page 7)

Form I-PDH/SDH/PEH/SHH/PXH, Page 7
Other Field-Installed Accessories
4.1 Clearances
For safety and convenience, provide clearances as shown in TABLE 2 and TABLE 3.
Clearance to combustibles is defined as the minimum distance from the heater to a
surface or object that is necessary to ensure that a surface temperature of 90°F above
the surrounding ambient temperature is not exceeded. Minimum clearances are also
listed on the heater rating plate.
Minimum Clearances from Combustible Material
Control
Side
Opposite
Control
Side
Front Rear Top Bottom
Gas-Fired Models
Vent Connector at Unit Vent Pipe
inches 20 6 48 18 6 0 PDH/SDH - 18 SHH - 6 PDH/SDH - 6 SHH - 0
mm 508 152 1219 457 152 0 PDH/SDH - 457 SHH - 152 PDH/SDH -152 SHH - 0
TABLE 2 - Minimum Clearance from Combustibles - applies to All Sizes
Recommended Service Clearances by Model and Size
Model and Size
Control Side
Side
Opposite
Controls
Top
Control Side
(Basic)
Control Side
with Mixing
Box
Control Side
with Cooling
Coil*
SDH and PDH PEH SHH PXH inches mm inches mm inches mm inches mm inches mm
75, 100 10A, 20A, 40A N/A 000A 30 762 30 762 42 1067 6 152 18 457
125, 150 15B, 30B, 60B N/A 000B 34 864 34 864 52 1321 6 152 18 457
175, 200, 225 N/A 130, 180 000C 30 762 30 762 42 1067 6 152 24 610
250, 300 30D, 60D, 90D, 120D 260 000D 42 1067 42 1067 58 1473 6 152 24 610
350, 400A 40E, 80E, 120E 350 000E 52 1321 52 1321 66 1676 6 152 24 610
TABLE 3 - Service Clearances
4.0 Dimensions
and Clearances
Storage and Startup
If this system is going to be stored, take precautions to prevent condensate formation
inside the electrical compartments and motors. To prevent damage to the unit, do not
store sitting on the ground.
After the system has been moved to its installation site, remove all of the shipping
brackets and check all of the fans for free movement. See the check lists in Paragraph
9.0 before starting the unit and completing the Startup Form.
* Clearance is required to remove slide out drain pan.
If your unit was ordered with Option UV2, UVC lights in the cooling coil module, the
bulbs and a box of parts are shipped in the blower compartment for field installation.
Being careful not to touch the bulbs, verify the components with the instruction sheet
included with the parts.
Before beginning installation, be sure that all shipped-separate options ordered are
available at the site. In addition to the vent/combustion air kit, field-installed, shipped-
separate options could include an energy recovery unit, a downturn nozzle, VFD, a
thermostat or other wall-mounted control, a remote console, a disconnect switch, fill
and drain kit, water hammer arrestor, firestat, a vent cap, and/or a smoke detector.