Form 43343050
-24-
Jan 2014
14.0)
INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION
SUPPLY PRESSURE
SUPPLY PRESSURE
SUPPLY PRESSURE
SUPPLY PRESSURE
1.
The installer will provide a 1/8” N.P.T. tapped plug, accessible for test gauge connection immediately
upstream of the gas supply connection to the heater.
OUTLET GAS P
OUTLET GAS P
OUTLET GAS P
OUTLET GAS PRESSURE CHECK AND AD
RESSURE CHECK AND AD
RESSURE CHECK AND AD
RESSURE CHECK AND ADJUSTMENTS (HONEYWELL
JUSTMENTS (HONEYWELL
JUSTMENTS (HONEYWELL
JUSTMENTS (HONEYWELL 1
1
1
1----STAGE GAS VALVES)
STAGE GAS VALVES)
STAGE GAS VALVES)
STAGE GAS VALVES)
1.
Turn the gas valve to the “OFF” position. Remove the 1/8” plug from the combination gas valve at the
Outlet Pressure Tap
Outlet Pressure Tap
Outlet Pressure Tap
Outlet Pressure Tap shown below and connect a 1/8” nipple to the tapped hole. Connect the test gauge to
the nipple. Turn on the gas supply.
Pressure Regulator Adjustment
(under cap screw)
1/8 NPT
Inlet Pressure
Tap with 3/16 Hex
Allen Wrench Plug
1/8NPT
Outlet Pressure
Tap with 3/16 Hex
Allen Wrench Plug
Gas Control
Knob
Wiring
Terminals (2)
Ground
Terminals (2)
OUTLET
INLET
CAUTION
Never jumper these terminals. This
shorts out valve coil and may burn
out heat anticipator in thermostat.
STEP-OPENING
GAS CONTROL VALVE
ON
OFF
MV
MV
MODEL SUFFIX 5A
MODEL SUFFIX 5A
MODEL SUFFIX 5A
MODEL SUFFIX 5A
2.
With the main burner operating, check the burner manifold pressure using a water column manometer.
Gauges that measure pressure in pounds per square inch are not accurate enough to measure or set the
manifold pressure. All measurements MUST BE
MUST BE
MUST BE
MUST BE made when this heater and all other gas burning equipment
that is connected to the gas supply system are operating at maximum capacity.
3.
The combination gas valve is factory set and should not
The combination gas valve is factory set and should not
The combination gas valve is factory set and should not
The combination gas valve is factory set and should not require adjustment.
require adjustment.
require adjustment.
require adjustment. If full rate adjustment is
required, remove the cover screw. Using a small screwdriver, turn the adjustment screw clockwise
to
increase or counterclockwise
to decrease the gas pressure to the burner. Replace the cover screw. NOTE:
NOTE:
NOTE:
NOTE:
The step opening pressure of this gas valve is not adjustable.
The step opening pressure of this gas valve is not adjustable.
The step opening pressure of this gas valve is not adjustable.
The step opening pressure of this gas valve is not adjustable.
4.
Check the burner at step pressure, observing burner ignition and flame characteristics. The burner should
ignite properly and without flashback to the orifice, and should remain lit.
