Instructions For Pressure Test Gauge Connection - Space-Ray LTU Series Installation And Operation Instructions Manual

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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.
MANIFOLD PRESSURE – – – – COMBINATION GAS VALVE IS FACTORY SET MANIFOLD PRESSURE MANIFOLD PRESSURE MANIFOLD PRESSURE COMBINATION GAS VALVE IS FACTORY SET COMBINATION GAS VALVE IS FACTORY SET 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 T Outlet Pressure T Outlet Pressure T Outlet Pressure Tap ap shown below and connect a 1/8" nipple to the tapped hole. Connect the test gauge ap ap
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
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. The combination gas valve is factory set and should not require adjustment. If full rate adjustment is
The combination gas valve is factory set and should not require adjustment. The combination gas valve is factory set and should not require adjustment.
required, remove the cover screw. Using a small screwdriver, turn the adjustment screw clockwise
increase or counterclockwise
NOTE: The step opening pressure of this gas valve is not adjustable. NOTE: The step opening pressure of this gas valve is not adjustable. NOTE: The step opening pressure of this gas valve is not adjustable. 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 TYPE GAS TYPE GAS TYPE GAS TYPE
Natural Gas
Propane Gas
* Minimum permissible gas supply pressure for purpose of input adjustment.
1 7" W.C. for LTS/U 150-200
12" W.C. for LTS/U 180-250
2
MUST BE MUST BE made when this heater and all other gas burning MUST BE
to decrease the gas pressure to the burner. Replace the cover screw.
GAS PRESSURE TABLE GAS PRESSURE TABLE GAS PRESSURE TABLE GAS PRESSURE TABLE
MANIFOLD PRESSURE MANIFOLD PRESSURE MANIFOLD PRESSURE MANIFOLD PRESSURE
High High High High Low Low Low Low
3.5" W.C. 1.4" W.C.
10.0" W.C. 4.0" W.C.
-34-
SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE
Minimum* Minimum* Minimum* Minimum*
5" W.C. 1
11" W.C. 2
to
Maximum Maximum Maximum Maximum
14" W.C.
14" W.C.
Form #43155040
May 2013