Bryant Bruant 4 Way Gas 355AAV - Manual (Page 16)

16
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in fire, property
damage, personal injury, or death.
Do NOT install furnace on its back. (See Fig. 16.) Safety
control operation will be adversely affected. Never connect
return--air ducts to back of furnace.
!
WARNING
UNIT DAMAGE HAZARD
This gas furnace may be used for construction heat provided
that:
--The furnace is permanently installed with all electrical
wiring, piping, air filters, venting and ducting installed
according to these installation instructions. A return air duct is
provided, sealed to the furnace casing, and terminated outside
the space containing the furnace. This prevents a negative
pressure condition as created by the circulating air blower,
causing a flame rollout and/or drawing combustion products
into the structure.
--The furnace is controlled by a thermostat. It may not be “hot
wired” to provide heat continuously to the structure without
thermostatic control.
--Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
--The temperature of the return air to the furnace is maintained
between 55_F (13_C) and 80_F (27_C), with no evening
setback or shutdown. The use of the furnace while the
structure is under construction is deemed to be intermittent
operation per our installation instructions.
--The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the
nameplate value.
--The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
--The furnace, ductwork and filters are cleaned as necessary to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
--After construction is complete, verify furnace operating
conditions including ignition, input rate, temperature rise and
venting, according to the manufacturer’s instructions.
CAUTION
!
The furnace and its return air system shall be designed and installed
so that negative pressure created by the air circulating fan cannot
affect another appliance’s combustion air supply or act to mix
products of combustion with circulating air, and that the air
circulating fan of the furnace, if installed in an enclosure
communicating with another fuel--burning appliance not of the
direct--vent type, shall be operable only when any door or panel
covering an opening in the furnace fan compartment or in a return
air plenum on ducts is in the closed position.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in minor property or
unit damage.
If these furnaces are installed in an unconditioned space where
ambient temperatures may be 32_F (0_C) or lower, freeze
protection measures must be taken. (See Fig. 17.)
CAUTION
!
FRONT
BACK
FRONT
B
A
C
K
A93043
Fig. 16 -- Prohibit Installation on Back
A07911
Fig. 17 -- Freeze Protection
Step 2 — Low--Heat Only Installation
This 355AAV furnace can be installed to operate in the low--heat
only heating mode when sized using the low--heat heating capacity.
This is accomplished by placing setup switch SW1--2 in the ON
position to provide only low--heat operation. See Fig. 37 and Table
13. With this setup, high--heat operation will not occur.
355A