14.0) INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION
Never operate the heater with the access panel open or removed.
The access panels must be closed tightly with all the necessary screws during operation.
Failure to do so may result in death, serious injury or property damage.
The access doors on either side of the burner must be securely fastened before operating the heater.
DANGER
FIRE HAZARD
Never operate the heater with the access panel open or removed. This access panel must be closed tightly with all the necessary screws during operation.
Failure to do so may result in death, serious injury or property damage
SIDE VIEW
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.
MANIFOLD PRESSURE – COMBINATION GAS VALVE IS FACTORY SET
1.Turn the gas valve to the “OFF” position. Remove the 1/8” plug from the combination gas valve at the outlet pressure tap and connect a 1/8” nipple to the tapped hole. Connect the gauge to the nipple. Turn on the gas supply.
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 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 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: 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.
GAS PRESSURE TABLE
|
| SUPPLY PRESSURE | |
GAS TYPE | MANIFOLD PRESSURE | Minimum* | Maximum |
Natural Gas | 3.5” W.C. | 5” W.C. | 14” W.C. |
Propane Gas | 10.0” W.C. | 11” W.C. | 14” W.C. |
* Minimum permissible gas supply pressure for purpose of input adjustment.
| Form #43343330 |
May 08 |