Easurement - Amana xMVM97 series Installation Instructions Manual

PRESSURE
SWITCH
CONNECTION
Honeywell Model VR9205R
i
Outlet
Pressure
Tap
1/8 NPT
Honeywell Model VR9205R Connected to Manometer
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Connect a calibrated water manometer (or appropriate
gas pressure gauge) at either the gas valve inlet pressure
tap or the gas piping drip leg. See Honeywell VR9205R
gas valve figure for location of inlet pressure tap.
NOTE: If measuring gas pressure at the drip leg or Honeywell
VR9205R gas valve, a field-supplied hose barb fitting must be
installed prior to making the hose connection.
3. Turn ON the gas supply, check for leaks and operate
the furnace and all other gas consuming appliances on
the same gas supply line.
NOTE: To bring furnace up to High Fire, see
instructions for field test mode in GAS MANIFOLD
PRESSURE MEASUREMENT section.
ATMOSPHERE
PORT
FLOW
DIRECTION
Figure 48
2-PIN
POWER
CONNECTOR
Figure 49A
Figure 49B
4. Measure furnace gas supply pressure with burners firing.
Supply pressure must be within the range specified in the
Inlet Gas Supply Pressure table.
Natural Gas
Propane Gas
If supply pressure differs from table, make the necessary adjust-
ments to pressure regulator, gas piping size, etc., and/or con-
sult with local gas utility.
5. Turn OFF gas to furnace at the manual shutoff valve and
disconnect manometer. Reinstall threaded plug before
turning on gas to furnace.
6. Turn OFF any unnecessary gas appliances stated in step
3.
Inlet
Pressure
Tap
1/8 NPT
Measuring Inlet Gas Pressure (Alt. Method)
G M
AS ANIFOLD
T
O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE
GAS MANIFOLD PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING
. G
PLATE AS VALVE IS FACTORY SET AND DOES
F
IELD ADJUSTMENT
The manifold pressure must be measured with the burners oper-
ating. To measure the manifold pressure, use the following
procedure:
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Turn off all electrical power to the system.
3. Outlet pressure tap connections: Remove the outlet
pressure tap plug. Install an 1/8" NPT hose barb fitting
into the outlet pressure tap. Refer to gas valve diagram
on preceding page.
4. Attach a hose and manometer to the outlet pressure barb
fitting.
5. Turn ON the gas supply.
Inlet Gas Supply Pressure
Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Minimum: 11.0" w.c. Maximum: 13.0" w.c.
Gas Line
Gas
Shutoff
Valve
Gas Line
To Furnace
Open To
Atmosphere
Drip Leg Cap
With Fitting
Manometer Hose
Manometer
Figure 50
P M
RESSURE

EASUREMENT

CAUTION
NOT
. D
O NOT ATTEMPT TO ADJUST VALVE
,
THE
REQUIRE ANY
.
37