Lochinvar 000 Gas Supply, Gas Pressure Test, TABLE - K Inlet Gas Pressure, Gas Connection, L. P

GAS SUPPLY GAS PRESSURE TEST

Verify that the appliance is supplied with the type gas specified on the rating plate. Consult factory for installations at altitude.

INLET PRESSURE: Measured at the inlet pressure tap on the appliance gas manifold. The pressure tap is located upstream of the redundant gas valve and down stream of the field installed gas cock.

TABLE - K

Inlet Gas Pressure

	Natural	L. P.
	Gas	Gas
Max. (Inches-Water Column)	10.5" w.c.	13.0" w.c.
______________________________	________	_________
Min. (Inches-Water Column)	4.0" w.c.	4.0" w.c.

Maximum inlet gas pressure must not exceed the value specified. Minimum value listed is for the purposes of input adjustment.

MANIFOLD PRESSURE: Manifold pressure is a differential pressure measurement made between the high and low pressure taps at the gas orifice and the pressure in the transition chamber where the gas is supplied to the inlet of the combustion air blower. All manifold gas pressures are noted at full firing rate. The controls on this appliance may fire the burner from 25% up to 100% of rated input, based on system demand. Manifold gas pressure will be reduced as burner input is reduced. All reference gas pressure measurements must be made at 100% of rated burner input. The gas manifold pressure is pre-set at the factory by the ratio gas valve. Adjustment of manifold pressure is not normally required for proper operation. The adjustment point on the ratio gas valve is set at the factory. DO NOT attempt to adjust the settings on the ratio gas valve. Improper adjustment of the ratio gas valve may cause incomplete combustion or non-warrantable burner damage.

1.The appliance must be disconnected from the gas

supply	piping	system	during any	pressure	testing
of that	system	at a	test pressure	in excess	of 1/2
PSIG (3.5kPa).

2.The appliance must be isolated from the gas supply piping system by closing a manual shutoff valve during any pressure testing of the gas supply

piping system at test pressures equal to or less than 1/2 PSIG (3.5kPa).

3.The appliance and its gas connection must be leak-tested before placing it in operation.

GAS CONNECTION

1.Safe operation of unit requires properly sized gas supply piping. See gas line sizing data.

2.Gas pipe size may be larger than appliance connection.

3.Installation of a union at the appliance gas line connection is required for ease of service and removal of the gas train.

4. Install a manual main gas shutoff	valve,	outside	of
the appliance gas connection and	before	the	gas
valve, when local codes require.

5.A trap (drip leg) MUST be provided in the inlet of the gas connection to the appliance.

6.The diaphragm gas valve has a bleed port that requires venting to atmosphere, outside the building.

TABLE - L

Nominal Manifold Pressure

Settings at Full Fire

	Natural	L. P.
Input Btu/hr	Gas	Gas
1,500,000 - 2,000,000	3.5" w.c.	3.5" w.c.

7.Optional gas controls may require routing of bleeds and vents to the atmosphere, outside the building when required by local codes.

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