Heat Exchanger Pressure Drop Chart | Lochinvar 45000, 260000

4Water connections

Hot water piping must be supported by suitable hangers or floor stands, NOT by the boiler. Copper pipe systems will be subject to considerable expansion and contraction. Rigid pipe hangers could allow the pipe to slide in the hanger resulting in noise transmitted into the system. Padding is recommended on rigid hangers installed with a copper system. The boiler pressure relief valve must be piped to a suitable floor drain. See the relief valve section on page 23 of this manual.

	CAUTION	A leak in a boiler system will cause the
	CAUTION	system to intake fresh water constantly,
		system to intake fresh water constantly,
		which will cause the tubes to accumulate
		a lime/scale build up. This will cause a
		NON-WARRANTABLE FAILURE.

Water Connections

Heating Boilers with inputs of 45,000 - 260,000 Btu/hr have 1 1/2" NPT inlet and outlet connections.

CAUTION Field installed reducing bushings may decrease flow resulting in boiler noise or

flashing to steam.

Installation & Service Manual

Circulator Pump Requirements

This is a low mass, high efficiency hot water boiler which must have adequate flow for quiet, efficient operation. The boiler circulating pump must be field supplied. The boiler circulator pump must operate continuously while the boiler is firing. Pump selection is critical to achieve proper operation. A pump should be selected to achieve proper system design water temperature rise. A heat exchanger pressure drop chart (Table 4C) is provided to assist in proper pump selection. Also provided is a System Temperature Rise Chart (Table 4B on page 25). This table provides GPM and boiler head-loss at various temperature rises for each boiler based on Btu/hr input. Temperature rise is the difference in boiler inlet temperature and boiler outlet temperature while the boiler is firing. Example: The boiler inlet temperature is 160°F and the boiler outlet temperature is 180°F, this means that there is a 20°F temperature rise across the boiler.

TABLE - 4C

HEAT EXCHANGER PRESSURE DROP CHART

FT/HD

26

6

5

4

3

2

1

0

0	5	10	15	20	25	30	35
			Gallons per Minute

CB 45

CB 75

CB 90

CB 135

CB 180

CB 215 CB 260

Image 26

Lochinvar 45000, 260000 service manual Heat Exchanger Pressure Drop Chart, Water Connections, Circulator Pump Requirements

Contents

Models 45,000 260,000 Btu/hr Contents Warranty Please read before proceeding Codes Solution Boiler =B=R Rating Ratings Solution How it works Temperature and pressure gauge Solution How it works Solution How it works Determine boiler location Location of unit 3Combustion Air Direct from Outside 6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Vent Pipe Sizes VentingConventional Negative Draft Venting System Venting Vertical Vent Termination Clearances Less from Ridge From Parapet Wall Vent Materials Masonry Chimney InstallationSidewall Venting Negative Draft Fan Assisted Venting Automatic Vent Damper 7Vent Damper and Vent Damper Terminal Block Gas Connection Gas connectionsGas Supply Gas Pressure Test Install Piping to Control Gas Piping Gas Manifold Pressure Adjustment Procedure 2Wrench Checking Gas Supply Pressure 4Gas Supply Pressure Two Stage Burner Control System Combination Gas ValvesVenting of Combination Gas Valves Relief Valve Water Flow Switch if equippedWater connections Minimum Required Flow For Heating Boiler Typical Heating Boiler InstallationsLow Water Cutoff if equipped General Plumbing Rules System Temperature Rise Chart Piping of the Boiler System Circulator Pump Requirements Heat Exchanger Pressure Drop ChartWater Connections Circulator Pump Operation Circulator Pump SpecificationsPrimary/Secondary Boiler Piping Boiler Flow Rates Low Temperature Bypass RequirementsFull Flow Application Primary / Secondary Piping Make UP Water Make UP Water 6Multiple Boilers Zoned with Circulators Full System Flow From System 8Single Boiler Full System Flow with Low Temperature Bypass Electrical connections Terminal Strip WiringBoiler Operating Temperature Control Auxiliary Device Connection to Terminal Strip Temperature Adjustment AMP Draw Data Maximum SET Point Determination Maximum Set Point Determination Installation of Remote Sensors Outdoor Air Temperature SensorWiring of Remote Sensors Outdoor Air Reset Option Additional Temperature Controls Blocked Vent and Flame Roll-Out / Flame Interlock Switch 7Blocked Vent Switch Location Initial Start-up Pre-start ChecklistStart-up Lighting Instructions for Spark Ignition Pilot Models To Turn Off Gas to Appliance Safety Shutoff Test for Spark Ignition Pilot SystemOperating Instructions Water Treatment Intermittent Pilot Spark Ignition SystemFreeze Protection Ignition and Control Timings Owner maintenance Maintenance Maintenance and annual startupService technician See the User’s Information Manual for instructions Maintenance Check Expansion Tank Check Relief Valve Heat Exchanger / Burner Access Check All WiringCheck Control Settings Perform Start-up and Checks Inspection and Cleaning Breathing Fresh air Gas Train and Controls Review with ownerInspection of Heat Exchanger Waterways Water Circulating Pump Troubleshooting Troubleshooting Guide M9 Solution Boilers Wiring Diagram M9 Unit 45,000 260,000 Btu/hr Models DiagramsSchematic Diagram M9 Unit 45,000 260,000 Btu/hr Models