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7.
GAS
UNE
INSTALLATION
&
CHECKS
I
Conned the
1E"NPT
inlet connector to the furnace
inletpipeat
the
bottomright of the appliance.
Route the
gas
supply line to the inlet connection
connector.
Use
only
new
Mack
iron
or steel pipes or copper
tubing
if
acceptable
-
check
local codes.
Note
that
in
USA
copper
tubing
must
be
mtemally tmned
for
protectkn~against sutfur compounds.
Unions
in
gaslinesshould
be
of groundjoint
type.
The
gas
supply line must
be
sized and installed to
provide a
supply
of
gas
sufficient to meet the
maximum demand of the appliance without undue
loss of pressure.
Sealants used must.
be
-resistantto the
action
of all
gas constituents including
LP
gas. Sealants should
be
applied
lightly to male threads to ensure excess
sealant doesnot enter gas lines.
The
supply line should include a manual shut-off
valve to allow the appliance to be disconnected for
servicing.
A plugged 1mPTtapping must
be
installed in the
tine. The tapping must
be
accessible for test gauge
connection and
be
immediately upstream of the gas
supply connectionto the appliance.
Pressuretest
the
supplyline.
The appliance and its individual shut-off valve
must
be
disconnectedfrom the gas supply piping
system duringany pressuretestingof that system
at test pressures inexcess of Hpsig(3.5kPa).
The appliance must
be
isolated from the gas
supply piping system by closing its individual
manual shut-off valve during any pressure testing
of the gas supply pipingsystem at test pressures
equalto or lessthan Hpsig(3.5kPa).
Failure to either disconnect o: isolate the
appliance during pressure testing may result in
regulatoror valve damage. Consult your dealer in
this case.
All piping and connections must
be
tested for leaks
alter mstallation or se~cing.
All
leaks must
be
correctedimmediately.
When
testingfor leaks:
Make sure that the control knob is at the
'Off
position.
Openthe manualshut-off valve.
Test for leaks by applying a liquid detergent or
soap solution to all joints. Bubbles forming
indicatea gas leak.
Nsver
we
m
qpsn
&me
to
check
for
leaks.
Correct any leak detected immediately.
7.1 1
Check
mantiold
pressure.
7.11.1
The burner manifold pressure
is
cmtmlled by
regulator
within
the
thermostat unit.
The
correct
pressure
range
is
shown
in
the
tab&
in
section
2
of
this manual
Check
pressureasfollows.
7.1 12
Move outer
case
close
to furnace and reconnect the
ignitionwire to the igniter buttonunit.
7.113
Fit manometer to manifold pressure test tapping
point
Tapping
is
the point nearest
the
Imnt
a!
bonom
of thermostat unit (seefigure
13).
.7.11.4
Turn control to Pilot. Press igniter
button
to lght pilot
them
turn to
'HI'.
7.105
The manifold pressure should
be
within
the
limits
shown inthe
table
in
section
2
of thismanual.
7.11.6
If
pressure
is
outside the limits,adjust
by
turning the
regulator screw located at the top of the thermostat
(seefigure
13).
Fig.
13
Pressuretest
&
adjustment
points
I
8.
FINALINSTALLATION
&
CHECKS
'
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8.1
Detachthe igniter wire from the igniterbutton.
8-2
Refit the outer case over
the
furnace Refd and
tghtenthe screws at the bonom comers.
84
Reconnectthe igniter wreto the igniter button.
8.4
Check ignitionand thermostat controloperatim
(See
owner's lighting instructions further on in this
manual).
8.5
lnstnrctthe owner howto operatethe appliance.
8.6
Recommend that the appliance is inspected and.
if
necessary,serviced at least
once
a year.
8.7
Point out the locationof the supply shut off
vake
and
its operation.
8.8
Point out the location of the vent terminal. Advise
that, for sate and efficient
pera at ion,
no objects
should
be
placed within
2
feet
(60an)
of
he
vent
terminal.