10
Proper air flow is required for the correct operation of this
furnace. Restricted air flow can cause erratic operation and
can damage the heat exchanger. The duct system must
carry the correct amount of air for heating and cooling if
summer air conditioning is used.
IMPORTANT:
When using outside air, design and adjust
the system to maintain a return air temperature ABOVE
55° F during the heating season.
NOTE:
Return air grilles and warm air registers must not
be obstructed or closed.
DOWNFLOW INSTALLATIONS
1. Position the unit to minimize long runs of duct or runs
of duct with many turns and elbows.
2. If summer air conditioning is desired, position the in-
door coil on the supply-air side of the unit. Ensure that
no air can bypass this coil.
3. If installing on a combustible floor
and not using an
air conditioning plenum,
install the special non-com-
bustible floor base. See Table 1 and Figure 5.
4. Connect the furnace to the supply air plenum. See Fig-
ure 4.
5. Connect the return air ducting to the return air opening
at the top of the unit. Make the connection air tight to
prevent the migration of toxic fumes and odors includ-
ing carbon monoxide from migrating into the living
space from an adjacent fuel-burning appliance.
NOTE:
In downflow configuration, side return air cut
out is not permitted. Do not take return air from the
back of the unit.
6.
If a filter is installed near the furnace, be sure to
have adequate space for installation and removal
of the unit filter.
NOTE:
DO NOT take return air from furnace rooms,
garages or cold areas. Avoid return air from utility
rooms, kitchens, laundry rooms and bathrooms.
DUCTING
Du
cti
ng
!
WARNING
BLOWER AND BURNERS MUST NEVER BE OPERATED
WITHOUT THE BLOWER DOOR IN PLACE. THIS IS TO
PREVENT DRAWING GAS FUMES (WHICH COULD CON-
TAIN HAZARDOUS CARBON MONOXIDE) INTO THE
HOME THAT COULD RESULT IN PERSONAL INJURY OR
DEATH.
!
WARNING
SOME HEATING AIRFLOW VALUES MAY BE
HIGHER THAN THOSE REQUIRED FOR COOLING.
BE SURE TO SIZE DUCT FOR THE MAXIMUM POS-
SIBLE AIRFLOW VALUE.
SIZE AIRFLOW DISTRIBUTION SYSTEM TO AC-
CEPTABLE INDUSTRY STANDARDS AND METH-
ODS. TOTAL STATIC PRESSURE DROP OF THE AIR
DISTRIBUTION SYSTEM SHOULD NOT EXCEED .8
INCHES W.C. THIS WILL INCLUDE ANY AIR CONDI-
TIONER COIL, AIR FILTRATION SYSTEM, ZONING
SYSTEM, DUCTWORK, ETC. REFER TO ADDED
EQUIPMENT TECHNICAL INFORMATION TO OBTAIN
PRESSURE DROP INFORMATION WHEN EQUIP-
MENT IS OPERATING AT RECOMMENDED HEAT-
ING OR COOLING CFMS.
FIGURE 4
!
WARNING
A DOWNFLOW INSTALLATION IS CERTIFIED FOR
INSTALLATION ON A NON-COMBUSTIBLE FLOOR.
USE THE SPECIAL BASE SPECIFIED ON THE FUR-
NACE CLEARANCE LABEL. FAILURE TO INSTALL
THE SPECIAL BASE MAY RESULT IN FIRE, PROP-
ERTY DAMAGE, PERSONAL INJURY OR DEATH.
THIS BASE IS AVAILABLE AS AN ACCESSORY.
Содержание 801P series
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