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PRESSL
RE SWITCH
Tt BING
One collector
box pressure
tube (pink label) is fi_ctory cormected
to
the pressure
switch
for use when
J::urnace is installed
in L PFLOW
applications
This robe MLST
be disconnected
and used for the
condensate
trap relief port robe. The other collector
box pressure
robe (green
label) which
was fi_ctory connected
to the condensate
trap relief
port
connection
MUST
be connected
to the pressure
switch
in DOWNFLOW
or HORIZONTAL
R1GHT
applications
NOTE:
See Fig. 12 or tube routing
tahel on main fl/rnace
door to
check
for proper
connections
Relocate
tubes as described
below:
1. Disconnect
collector
box pressure
tube (pink label) attached
to
pressure
switch.
2. Extend
collector
box pressure
tube (green
label)
which
was
previously
connected
to condensate
trap relief port com_ection
by splicing
to small
diameter
robe (factoQ'-supplied
in loose
parts
bag).
3. Route
extended
collector
box pressure
robe behind
inducer
motor
bracket
then
between
inducer
motor
and
pressure
switch.
4. Connect
collector
box pressure
tube (green
label) to pressure
switch
connection
labeled
COLLE(TOR
BOX.
5. Use
remaining
smaller
diameter
tube
(fitctory-supplied
in
loose parts bag)
to extend
collector
box pressure
robe (pink
label) which
was previously
connected
to pressure
switch.
6. Route this extended
tube (pink label) to condensate
trap relief
port connection.
7. Detem_ine
appropriate
length,
cut, and connect
robe.
8. (lamp
robe to relief port connection.
CONDENSATE
TRAP
FREEZE
PROTECTION
Refer
to Condensate
Drain
Protection
section
for recommendao
tions and procedures.
CONSTRU(T
A WORKING
PLATFORM
Constnlct
working
platfbm_
where
all required
Nmace
clearances
are met. (See Fig. 3 and 11.)
[TNIT MAY
NOT
OPERATE
Failure
to %llow
this caution
may result
in intem_ittent
unit
operation.
The condensate
trap MUST
be installed
below
fire, ace
See
Fig
5 tbr dimensions,
The drain
connection
to condensate
trap must also be properly
sloped
to an open
&ain
NOTE:
Combustion-air
and vent pipes are restricted
to a mini°
mum length
of 5 fi. (See Table
7.)
NOTE:
A 12-in.
minimun_
offset
pipe section
is recommended
with
short (5 to 8 ft) vent
systems.
This
recommendation
is to
reduce
excessive
condensate
&oplets
fi'om exiting
the vent pipe.
(See Fig.
11 or 34.)
UPFLOW OR DOWNFLOW
V2" MAX
HORIZONTAL
A02146
Fig. 13--Furnace
Location for Proper Condensate
Drainage
LOCATION
Step l--General
This furnace must
*
be installed
so the electrical
components
are protected
from
water.
not be installed
directly
on any combustible
material
other than
wood
flooring
(refkr to SAFETY
CONSIDERATIONS).
*
be located
so combustion-air
and vent pipe maximum
lengths
are not exceeded.
Refkr to Table
7
*
be located where
available
eteca'ic power
and gas supplies
meet
specifications
on the furnace
rating
plate
*
be attached
to an air distribution
system
and be located
as close
to the center of the distribution
system
as possible
Re['cr to Air
Ducts
section
*
be provided
with
ample
space
fi_r servicing
and
cleaning.
Always
comply
with
minimum
fire
protection
clearances
shown
on the Nrnace
clearance
to combustibles
label.
NOTE:
For upflowidownflow
applications
install
fiu'nace so that
it is level
or pitched
fbnvard
within
1/2-in.
for proper
hmaace
operation.
For horizontal
applications
pitch
1/4-in.
minimum
to
li2-in,
maximum
forward
to ensure
proper
condensate
&ainage
from secondaw
heat exchangers.
(See Fig. 13.)
When a furnace
is installed
so that supply ducts car_- air circulated
by the fllmace
to areas outside
the space
containing
the furnace.
the return
air shall also be handled
by duct(s)
sealed
to filmace
casing
and terminating
outside
tl_e space containing
the fitrnace
to
ensure
there
will
not be a negative
pressure
condition
within
equipment
room or space.
This Nrnace
may be located
in a confined
space
without
special
provisions
for dilution
or ventilation
air.
13
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