Instructions For Pressure Test Gauge Connection - Space-Ray LTU 80– N5 Installation And Operation Instructions Manual

15.0)

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.
MANIFOLD PRESSURE MA MA MA NIFOLD PRESSURE NIFOLD PRESSURE – – – – COMBINATION GAS VALVE IS FACTORY SET NIFOLD 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 Pressure T Pressure T Pressure Tap ap ap shown below and connect a 1/8" nipple to the tapped hole. Connect the test gauge to the ap
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
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
The step opening pressure of this The step opening pressure of this The step opening pressure of this gas valve is not adjustable. The step opening pressure of this
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.
7" W.C. for LTS/U 150-250
1
12" W.C. for LTS/U 180-250
2
MUST BE made when this heater and all other gas burning equipment
MUST BE MUST BE
to decrease the gas pressure to the burner. Replace the cover screw. NOTE:
gas valve is not adjustable. gas valve is not adjustable. gas valve is not adjustable.
GAS PRESSURE TABLE GAS PRESSURE TABLE GAS PRESSURE TABLE GAS PRESSURE TABLE
MANIFOLD PRESSURE MANIFOLD PRES MANIFOLD PRES MANIFOLD PRES SURE SURE SURE
3.5" W.C.
10.0" W.C.
-34-
SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE
Minimum* Minimum* Minimum* Minimum*
5" W.C.
1
11" W.C.
2
Outlet Outlet Outlet
to
NOTE: NOTE: NOTE:
Maximum Maximum Maximum Maximum
14" W.C.
14" W.C.
Form #43155010
May 2013