MUNI
I
UK
HEATING
SYSTEM
Section
2:
Installation
IGF38QQI
GAS
CONVERSION PROCEDURE
"THE CONVERSION SHALL
BE
CARRIED
OUT IN
ACCORDANCE WITH
THE
REQUIRE-
MENTS
OF THE
PROVINCIAL AUTHORITIES
HAVING
JURISDICTION
AND IN
ACCORDANCE
WITH
THE
REQUIREMENTS
OF THE
CAN1-
B149.1
AND .2
INSTALLATION CODE"
A
CAUTION:
READ
BEFORE CONVERSION
1.
THE
POWER PLUG MUST
BE OUT OF THE
SOCKET
FOR
FIVE MINUTES BEFORE
BE-
GINNING
THE
CONVERSION PROCEDURE.
When
you
switch
the gas
type slide selector
to
NAT
position,
the
software
of the
midro-com-
puter
will
not be
changed over
if the
power
cord
is
plugged into
the
socket.
This caution should also
be
considered
for
converting
the
GF3800
NAT to
GF3800
LP.
2. To
check
the
manifold pressure, perform
the
check
twice
in
each burner mode,
in
order
of
High—Low—High
—
Low.
3. Be
sure
to
check
that
there
is no gas
leakage
from
any
part
of the
GF3800.
CONVERSION
PROCEDURE
TO
NATURAL
GAS
1.
Replace
the LP
orifice with
the
natural orifice
which
is
included
in the
conversion
kit.
2.
Replace
the air
damper with that
for NAT
which
is included in the
conversion
kit.
3.
Slide
the gas
type selector
on the PCB to the
NAT
position.
4.
Check that
the
manifold pressure matches
the
following values.
If
not,
adjust
them
to the
following
values
using
the
volume resistor
(VR
1:
High,
VR 2:
Low)
on the
PCB.
High:
3.4'
!g
2S
W.C.
Low :
1.26"T
6
W.C.
CONVERSION
PROCEDURE
TO LP GAS
1.
Replace
the
natural
orifice
with
the LP
orifice
which
is
included
in the
conversion
kit.
2.
Replace
the air
damper with that
for LP
which
is
included
in the
conversion
kit.
3.
Slide
the gas
type
selector
on the PCB to the
LP
position.
4.
Check that
the
manifold
pressure matches
the
following values.
If
not,
adjust them
to the
following
values
using
the
volume
resistor
(VR
1:
High,
VR 2:
Low)
on the
PCB.
High:
3.15"
:?^
5
W.C.
Low
:
1.26"T
6
W.C.
After
check,
reinstall
fitting
and
check
for
leaks.(See
instruction
page
20#7)
2-7
HIGH ALTITUDE INSTALLATION
All
Units must
be
installed according
to the
following chart
to
determine which orifice will
be
used
for the
appropriate altitude.
NATURAL
GAS
UP
TO
2000
feet
No
changing
orifice (3.50mm)
2000-6000
feet
3.35
mm
drill
size orifice
LPGAS
UP
TO
2000
feet
No
changing orifice(2.64
mm)
2000-6000
feet
2.53
mm
drill
size orifice
^WARNING:
Do
not use
above 6000
feet.
2-8
MANIFOLD PRESSURE READINGS
Manifold pressure readings
are
based
on the
unit
in a
standard
installation.
Use
of
extension kits will increase readings
as
follows.
Gas
Nat.
LP
Installation
extension kits
up to 20"
extension
kits
exceeding
20"
extension kits
up to 20"
extension kits
exceeding
20"
Manifold
Pressure
W.C.
High burn
3.5"
3.7"
3.4"
3.58"
Low
burn
1.38"
1
.42"
1.38"
1.44"
21
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