26
SYSTEM OPERATION
CLEARANCES
24" MIN.
24" MIN.
36” MIN.
Unit Clearances
*In situations that have multiple units, a 36” minimum
clearance is required between the condenser coils.
Adequate clearance around the unit should be kept for
safety, service, maintenance, and proper unit operation.
A clearance of 48” is recommended on all sides of
the unit to facilitate possible parts replacement, to
allow service access and to insure proper ventilation
and condenser airflow. The top of the unit should be
completely unobstructed. If units are to be located under
an overhang, there should be a minimum of 48” clearance
and provisions made to deflect the warm discharge air out
from the overhang. The unit should be installed remote
from all building exhausts to inhibit ingestion of exhaust air
into the unit fresh air intake.
NOTE: If the 36” minimum clearance is used on the
control panel side of a DRG unit, a flue extension kit
needs be to installed to prevent flue gas recirculation. See
table below for the kit selection.
Model size
Kit part number
3 ton
HEFLUE036
4 & 5 ton
HEFLUE048060
6 ton
HEFLUE072
Flue Extension Kits
Roof Curb Installation
ROOF CURB POST-INSTALLATION CHECKS
After installation, check the top of the curb, duct
connection frame and duct flanges to make sure gasket has
been applied properly. Gasket should be firmly applied
to the top of the curb perimeter, duct flanges and any
exposed duct connection frame. If gasket is loose, re-apply
using strong weather resistant adhesive.
Protrusion
Inspect curb to ensure that none of the utility services
(electric) routed through the curb protrude above the
curb.
CAUTION
If protrusions exist, do not attempt to set unit on
curb.
ROOF TOP DUCT CONNECTIONS
Install all duct connections on the unit before placing the
unit on rooftop.
Horizontal Discharge
Refer to IOD-7082 included in the literature pack for
installing horizontal duct covers.
Flexible duct connectors between the unit and ducts are
recommended. Insulate and weatherproof all external
ductwork and joints as required and in accordance with
local codes.
Содержание DRG0361DL00001S
Страница 20: ...20 SYSTEM OPERATION...