Installation guide
129098-UIM-H-1011
TOOLS
AND
INFORMATION
THAT
WILL
BE
REQUIRED
IN
ORDER
TO
PROPERLY
PERFORM
THE
FURNACE
START-UP
PROCECURE.
1.
Call
the
local
gas
supplier
to
obtain
heating
value
of
the
natural
gas.
if
you
cannot
obtain
the
heating
valve
of
the
gas
from
the
gas
supplier,
you
may
use
a
default
value
of
1030
BTU/SCF
(38.8
MJ
/
m?).
2.
You
will
need
a
thermometer
or
portable
digital
thermometer
to
read
the
supply
and
return
air
temperatures.
3.
You
will
need
a
U-tube
manometer
or
digital
equipment
that
has
the
ability
to
read
pressures
between
0
—
15”
in.w.c
(0
-
3.73
kPa)
in
order
to
measure
the
gas
line
and
the
manifold
pressures.
4.
You
will
need
a
3/32” Allen
wrench
for
the
pressure
port
plugs
in
the
gas
valve.
5.
You
will
need
2
pieces
of
1/8”
(0.3
cm)
ID
flexible
tubing
that
is
12”
(30
cm)
in
length,
2
—
pieces
of
1/8”
(0.3
cm)
tubing
that
are
4”
(10.0
em)
in
length,
and
a
1/8”
(0.3
cm)
adapter
to
connect
the
U-
tube
manometer
or
the
digital
pressure
measuring
equipment
to
the
gas
valve
pressure
ports.
There
is
an
accessory
kit
(1PK0601)
available
from
Source
1,
which
has
the
following
items:
*«
1-12"
(30
cm)
length
x
1/8”
(0.3
cm)
diameter
tubing
*
2-pieces
of
4”
(10
cm)
length
x
1/8”
(0.3
cm)
diameter
tubing
+
1-5/16"
(0.8
cm)
tee
*
1-5/16"
(0.8
cm)
x
1/8”
(0.3
cm)
reducing
coupling
«
1-1/8"
(0.3
cm)
adapter
There
is
a
accessory
kit
(1PK0602)
available
from
Source
1,
which
has
the
following
items:
«
12”
(30
cm)
length
x
1/8”
(0.3
cm)
diameter
tubing
*
2-pieces
of
4”
(10
cm)
length
x
1/8”
(0.3
cm)
diameter
tubing
+
1-5/16”"
(0.8
cm)
tee
*
1-5/16"
(0.8
cm)
x
1/8”
(0.3
cm)
reducing
coupling
«
1-1/8"
(0.3
cm)
adapter
+
1-
Dwyer
—Manometer
These
items
are
required
in
order
to
properly
perform
the
required
start-
up
procedure.
IGNITION
SYSTEM
SEQUENCE
1.
Turn
the
gas
supply
ON
at
external
valve
and
main
gas
vaive.
2.
Setthe
thermostat
above
room
temperature
to
call
for
heat.
3.
System
start-up
will
occur
as
follows:
a.
The
induced
draft
blower
motor
will
start
and
come
up
to
speed.
Shortly
after
inducer
start-up,
the hot
surface
igniter
will
glow
for
about
30
seconds.
b.
After
this
warm
up,
the
ignition
module
will
energize
(open)
the
main
gas
vaive.
c.
After
flame
is
established,
the
supply
air
blower
will
start
in
the
time
set
on
the
control
board.
FIRE
OR
EXPLOSION
HAZARD
Failure
to
follow
the
safety
warnings
exactly
could
result
in
serious
injury,
death
or
property
damage.
Never
test
for
gas
leaks
with
an
open
flame.
Use
a
commercially
available
soap
solution
made
specifically
for
the
detection
of
leaks
to
check
all
connections.
A
fire
or
explosion
may
result
causing
property
damage,
personal
injury
or
loss
of
life.
IMPORTANT
Burner
ignition
may
not
be
satisfactory
on
first
start-up
due
to
resid-
ual
air
in
the
gas
line
or
until
gas
manifold
pressure
is
adjusted.
The
ignition
control
will
make
3
attempts
to
light
before
locking
out.
With
furnace
in
operation,
check
all
of
the
pipe
joints,
gas
valve
connec-
tions
and
manual
valve
connections
for
leakage
using
an
approved
gas
detector,
a
non-corrosive
leak
detection
fluid,
or
other
leak
detection
methods.
Take
appropriate
steps
to
stop
any
leak.
If
a
leak
persists,
replace
the
component.
The furnace
and
its
equipment
shut-off
valve
must
be
disconnected
from
the
gas
supply
piping
system
during
any
pressure
testing
of
that
system
at
test
pressures
in
excess
of
1/2
PSI
(3.45
kPa).
The
furnace
must
be
isolated
from
the
gas
supply
piping
system
by
closing
the
equipment
shut-off
valve
during
any
pressure
testing
of
the
gas
supply
piping
system.
CALCULATING
THE
FURNACE
INPUT
(NATURAL
GAS)
NOTE:
Burner
orifices
are
sized
to
provide
proper
input
rate
using
natu-
ral
gas
with
a
heating
value
of
1030
BTU/Ft’.
If
the
heating
value
of
your
gas
is
significantly
different,
it
may
be
necessary
to
replace
the
ori-
fices.
1.
Turn
off
all
other
gas
appliances
connected
to
the
gas
meter.
2.
Atthe
gas
meter,
measure
the
time
(with
a
stop
watch)
it
takes
to
use
2
cubic
ft.
(0.0566
m°)
of
gas.
3.
Calculate
the
furnace
input
by
using
one
of
the
following
equa-
tions.
Johnson
Controls
Unitary
Products
21