Carrier 58SS/DH - Manual (Page 7)

FURNACE LOCATION WITH RESPECT
TO COOLING EQUIPMENT
The cooling coil must be installed parallel with, or on
the downstream side of the furnace to avoid condensa­
tion in the heating element. When installed parallel with a
furnace, dampers or other means used to control the flow
of air must prevent chilled air from entering the unit.
If the dampers are manually operated, they must be
equipped with means to prevent operation of either unit
unless the damper is in the full-heat or full-cool position.
SPECIAL LOCATIONS
When the furnace is installed in a residential garage,
burners and ignition source should be no less than 18 in.
above the floor. Furnace should be protected against
physical damage by vehicles.
When the furnace is installed in public garages, air­
plane hangars, or other buildings having hazardous
atmospheres, it should be installed in accordance with
recommended good practice requirements of the National
Fire Protection Association.
APPENDIX —
Venting Replacement Installations
1. The vent is a critical part of the heating system. It
should always be examined prior to installation of
the furnace.
II. When installing high-efficiency furnaces on a venting
system that is “marginal,” the following suggestions
may help;
A. Set furnace to full input rate. New furnaces are
commonly set conservatively at factory.
B. Minimize restrictions in vent connector — use as
few elbows as possible.
C. Insulate any long horizontal single-wall vent
connector with 1/2-in. insulation or use double­
wall pipe.
D. Follow recommendations in flow charts regarding
application of 58SC, SS, DH induced-draft fur­
naces on existing chimney.
Existing Chimney
Type-BI Vents
Existing Chimney
Masonry Chimney
Existing Chimney
Masonry Chimney — Tile Liner