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I-RX-RG-RPV (09-19) PN1027501R0
Figure 7. Clearance Supports for RX and RPV Series Models
Venting
Gravity-Vented Outdoor Models (H)-RX,CRX,RG,CRG
⚠ WARNING ⚠
Model series RX and RG gravity-vented furnaces should be located on a roof or slab with at least
a 30-foot (9-meter) radius between the center of the vent cap and obstructions such as walls,
parapets, or cupolas.
NOTE: The appropriate size (refer to Table 9) of gravity vent cap is supplied with the furnace.
DETAIL B
DETAIL A
Table 9. Vent Cap Data
Model All (H)-CRX,CRG (H)-RX,RG All
Unit Size 75, 100 125, 150, 175 200, 225, 250 300 350, 400
Size (inches (mm)) 6 (152) 8 (203) 10 (254) 12 (305)
Extension required No Yes (packed inside cap)
Rigging and Mounting Furnace
⚠ DANGER ⚠
To prevent injury, death, or equipment damage, ensure that lifting device and rigging is adequate for
the weight (refer to Table 6) of the unit. Before installing the furnace, check the supporting structure
to be used to verify that it has sufficient load-carrying capacity to support the weight of the unit.
Lifting holes are provided at each of the four corners of the mounting support rails. Use spreader bars when lifting
to prevent chains or cables from damaging the cabinet. RG series models may be placed directly on a slab or roof
where support is adequate. Support rails provide required clearance from combustibles. RX and RPV series models
require a 3-inch (76-mm) minimum clearance from the bottom of the unit to a combustible surface. Available support
feet (PN 10680, four (4) required, see DETAIL A, Figure 7) or 3-inch (76-mm) field-fabricated supports (see DETAIL
B, Figure 7) will provide adequate clearance.
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