GAS Piping, Checking GAS Supply Pressure

Lochinvar 000 through 2 GAS Piping, GAS Manifold Pressure Adjustment, Install Piping to Control

Page 25

GAS PIPING

GAS INLET

TRAP

FIG. 34 Gas Line Connection to Unit with Sediment Trap and Manual Main Gas Shut-off Valve

All gas connections must be made with pipe joint compound resistant to the action of liquefied petroleum and natural gas. All piping must comply with local codes and ordinances. Tubing installations must comply with approved standards and practices.

Install Piping to Control

1. The	gas	line should	be	a	separate line direct			from
the	meter unless		the	existing		gas	line is	of
sufficient		capacity.	Verify		pipe	size	with your	gas
supplier.

2.Use new, properly threaded black iron pipe free

from	chips.	If tubing is	used,	make	sure the	ends
are	square, deburred and		clean.	All	tubing	bends
must be smooth and without deformation.						Avoid
flexible gas		connections.	Internal		diameter of
flexible gas lines may not provide					appliance	with
proper volume of gas.

3.Install a manual main gas shutoff valve at the units

gas

inlet,

outside

of the appliance

and

before

the

gas

valve.

Install

union

at the appliance

gas

line

connection

for

ease

service

and

removal

the gas train.

Run

pipe

or tubing

to the units gas inlet.

tubing

is used, obtain

tube

pipe

coupling

connect

the tubing to the units gas inlet.

Install a

sediment

trap in the supply line

the

units gas inlet. (see Figure 34).

6.Remove seal over gas inlet to the appliance.

7.Apply a moderate amount of good quality pipe compound (DO NOT use Teflon tape) to pipe only, leaving two end threads bare.

8.Connect gas pipe to inlet of appliance. Use wrench to support gas manifold on the appliance.

9.For LP gas, consult your LP gas supplier for expert installation.

GAS MANIFOLD

PRESSURE ADJUSTMENT

The manifold gas pressure on the Intelli-Fin appliance is not field adjustable. The ratio gas valve has been factory set with an internal bias adjustment to ensure a 1:1 air/gas ratio on operation. Tampering with this adjustment will void the warranty on the gas valve assembly and the burner. An Intelli-Fin supplied with a properly sized gas line, properly sized meter and a minimum of 4 inch water column of gas supply pressure while firing at full rate will ensure full burner input. The manifold pressure supplied to the burner is a differential pressure. This pressure is the result of the difference in two gas pressure measurements. A differential manifold gas pressure measurement should not be made until you have measured the gas supply pressure. Gas supply pressure must be a minimum of 4 inch water column with all appliances on the gas line firing at full rate before a manifold pressure measurement is made. Use the following procedure to check gas supply pressure with a manometer connected to the inlet pressure tap on the gas line connection at the rear of the appliance.

CHECKING GAS SUPPLY PRESSURE

FIG. 35 Gas Supply Pressure Measurement

Image 25

Contents

Special Instructions To Owner WarrantyIFB/IFW-i&s-05 Table of Contents Do not Checking EquipmentWhat to do if YOU Smell GAS Owner WarningRecommended Service Clearances Installation Procedure Location of UnitTable a Clearances from Combustible ConstructionCombustion Air Direct from Outside Minimum Recommended Combustion Table BAIR Supply to Mechanical Room 500 in2 3226 cm2 667 in2 4303 cm2 000 in2 12,903 cm2Construction Air Filter Construction AIR FilterVenting Construction AIR Filter Kits Table CTable D Category IV Flue Pipe SizesCategory IV Venting Category IV Positive Pressure Venting SystemCategory IV Flue Pipe Materials Venting Guidelines for a Category IV VentGeneral Category IV Vent Termination Clearances Drain Tee InstallationExceed a maximum of 100 equivalent feet 30.5 m in length Vertical Venting Terminations Masonry Chimney InstallationsTable E Sidewall Venting TerminationsSidewall Vent Cap Kits Sidewall VentDirect Vent INTELLI-VENT Systems Location of a Sidewall Vent TerminationDirect Vent and Intelli-Vent Flue Air Inlet Pipe Sizes Table FAir Inlet Length of Air Inlet PipeCombined Combustion Air Inlet Points Vertical Direct Vent SystemsHorizontal Direct Vent Multiple Vertical Direct Vent InstallationsTable G Sidewall Combustion AIR InletLocation of a Sidewall Air Inlet Cap These are Multiple Horizontal Direct Vent InstallationsCombined Air Inlet Points Table HMaximum Length of an Intelli-Vent System Air Inlet Sidewall Input Flue Pipe Btu/hr SizeAir Inlet Sidewall Input Flue Pipe Horizontal INTELLI-VENT with Vertical Combustion AIRBtu/hr Size Cap Kit 500,000 SVK3026Location of a Rooftop Air Inlet Cap Vertical Combustion Horizontal INTELLI-VENT AIR InletTable J Table K GAS Supply GAS Pressure TestGAS Connection Table LMultiple Appliance Installations Gas Pipe Size Chart Recommended Gas Pipe Size Single Appliance InstallationsTable M Table NInstall Piping to Control GAS Manifold Pressure AdjustmentGAS Piping Checking GAS Supply PressureChecking Manifold GAS Pressure Water Connections Water ConnectionsInlet and Outlet Connections Secondary Heat Exchanger Primary Heat ExchangerMinimum Pipe Size Requirements Bypass Valve Synchronization Integral BypassIntegral Circulator Bypass Piping AssemblyOptional Intermittent Pump Operation Bypass Initial Set-up of Maximum Water FlowBtu/hr Input Temperature Rise Minimum Water TemperaturesTable P Bypass OperationTable Q Water Flow SwitchLOW Water Cutoff GAS Train and ControlsDiaphragm GAS Valve Ratio GAS Valve Relief ValveElectrical Connections Jacket AssemblyFront Control Panel Locations Access to Components and ControlsTransformer and Relay Locations Variable Frequency DriveLOW AIR Pressure Switch High GAS Pressure Switch LOW GAS Pressure Switch OptionalExcel Be used as a diagnostic indicator Default Values Pre-programmed in the Excel Temperature AdjustmentTable S To Activate the Manual OverrideConfiguring Command Display Password FunctionTable T Display Default Values Accessing the SIX Changeable Points from Command DisplayTotal Run Time Calculated Set PointSet Point Temp Sequencing TypeCommand Display Data Screen Table U Status PointsStatus Point Operational Modes Hot Surface Igniter OnOptional on Heating Boilers Only Outdoor Reset Function SelectionsEfficiency Optimized with Time Equalization Multiple Appliance InstallationsInterfacing Multiple Appliances Singly Terminated FTT Network Bus Topology SpecificationsTable W Additional Components Used to Interface Multiple Appliances Wire Termination for E-Bus ConnectionTypical Building Management System Diagram High Water Temperature Limit ControlHOT Surface Ignition System Service PartsIgnition Module Lockout Functions Table Y Diagnostic Status IndicationIgnition and Control Timings Table ZIndicator OPERATION/DIAGNOSTIC LIGHTS, Resets and SwitchesBurner Table AACombustion Air Blower and Transition Chamber Combustion AIR BlowerSystem Optional Condensate ManagementTable BB Condensate Drain Location On RearCondensate Trap Installation Condensate TestingReplenishing the Neutralizer Lighting Instructions Install Condensate TrapIgnition System Checkout To Turn OFF GAS to ApplianceHeat Transfer Process Sequence of OperationEnd of Sequence MaintenanceBurner Maintenance Burner Removal and CleaningLocation of Primary Heat Exchanger Burner Cleaning ProcedureSecondary Heat Exchanger Inspection Lubrication Freeze Protection Freeze Protection for a Heating Boiler System If Required Heating Boiler InstallationsWater Treatment Water Connections Heating Boilers onlyPiping Lengths Primary Loop Circulator Pump SpecificationsBoiler Circulator Pump Limitations Circulator Pump OperationPRIMARY/SECONDARY Boiler Piping Minimum Boiler Water TemperaturesTable CC Boiler Temperature Rise Chart Table DDMaximum Flow for Heating Boiler Btu/hr Input Maximum FlowTypical Heating Boiler Installations TEMPERATURE/PRESSURE GaugePlacing the Boiler Operation Boiler Operating Temperature Control Installation with a Chilled Water SystemBoiler Operation Typical Water Heater Piping with Storage Tank Water Velocity ControlTable FF Table EEMaximum Flow Rate Btu/hr Input Water Chemistry Single Water Heater Piping with Two Storage Tanks Piping Multiple Unit InstallationsPump Operation Table GGHeat Exchanger Common ManifoldTable HH Thermostat SettingsThermal Expansion Optional Relief ValveCathodic Protection Ladder Diagram PWM Wiring Diagram

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Lochinvar 000 through 2 GAS Piping, GAS Manifold Pressure Adjustment, Install Piping to Control