Installation
Ed. 06/2006
17
Just after the installation is completed the gas
inlet pressure must be checked.
The minimum gas inlet pressure must be as
shown in table 1.
After checking the gas inlet pressure disconnect
the test gauge and tighten firmly the screw of the
gauge connection, then check for gas leaks from
it.
CHECKING THE GAS MANIFOLD PRESSURE
The gas manifold pressure can be measured by
connecting a test gauge to the connection
provided on the gas valve (see B in Figure 11).
The furnace comes factory–set at the correct
manifold
gas
pressure
(see
paragraph
“TECHNICAL DATA” on page 6).
5002/8002: Just after the installation is
completed the gas manifold pressure must be
checked
both
in
Hi
and
Lo
input.
5001/8001: check the pressure on gas input and
regulate it by the proper screw protected by a
cap; see Figure 11 below.
The gas manifold pressure shall be as shown in
“TECHNICAL DATA” on page 6.
Differences of plus or minus 0.1 in. w.c. are
accepted.
If the Hi or Lo gas manifold pressures are
different from the values given in table 1 for
more than 0.1 in. w.c., shut off the furnace and
contact your Service Agency.
For instructions about adjustment of the
manifold Hi and Lo pressures, see section 4 –
Servicing.
After checking the gas manifold pressure,
disconnect the test gauge and tighten firmly the
screw of the gauge connection, then check for
gas leaks from it.
E
G
H
A
B
C
Figure 11
- Valve manifold - 5001/8001: LEFT; 5002/8002: RIGHT.
KEY for 5001/8001
KEY for 5002/8002
A
TEST GAUGE CONNECTION FOR GAS INLET
PRESSURE
A
TEST GAUGE CONNECTION FOR GAS INLET
PRESSURE
B
TEST GAUGE CONNECTION FOR GAS MANIFOLD
PRESSURE
B
TEST GAUGE CONNECTION FOR GAS MANIFOLD
PRESSURE
C
NUT FOR PRESSURE ADJUSTMENT (PRESSURE
REGULATOR); THE SCREW IS COVERED BY A CAP
C
NUT FOR HI PRESSURE ADJUSTMENT (PRESSURE
REGULATOR)
E
ELECTRIC CLAMP CONNECTION
D
SCREW FOR LO PRESSURE ADJUSTMENT (HI – LO
OPERATOR)
G
ELECTRIC CABLE INLET
E
ELECTRIC CLAMP CONNECTION
H
HOLE FOR GAS SUPPLY INLET
G
ELECTRIC CABLE INLET
H
HOLE FOR GAS SUPPLY INLET
L
FLAME VIEW