Laars Mighty Stack MS-080 (Sizes 199, 300, 399) - Instal User Manual

WARNINGIf the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of

Laars Heating SystemsPage 10 U.S. Installations (see note 1) Canadian Installations (see note 2)A= Clearance above grade, veranda, porch, 12 inc

Mighty StackPage 11on the same wall, locate the vent terminal at least 3 feet (0.9m) horizontally from the combustion air terminal, and locate the ven

Laars Heating SystemsPage 122. A complete parts list for the venting system design or venting system.(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT

Mighty StackPage 13appliance to their previous conditions of use.7. Any improper operation of the common venting system should be corrected so that t

Laars Heating SystemsPage 14Figure 4. Venting.

Mighty StackPage 15Model andGas TypeDistance from Gas Meter or Last Stage Regulator0-100'0-31 m 100-200' 31-61m 200-300' 61-91m199 natu

Laars Heating SystemsPage 16SECTION 4.Water Connections4.1 Water System Piping Pipe the outlet from the heater’s relief valves such that any disch

Mighty StackPage 17Figure 4. Suggested Plumbing.Figure 5. Suggested Plumbing, Three Units (in rst, out last).

Laars Heating SystemsPage 18SECTION 5.Electrical Connections WARNINGThe appliance must be electrically grounded in accordance with the requirement

Mighty StackPage 19Figure 7. Wiring Diagram, ON/OFF Water Heater.

Laars Heating SystemsPage 2SECTION 1. General Information1.1 Introduction ... 31.2 Model Identi

Laars Heating SystemsPage 20SECTION 6.Operating Instructions6.1 Filling the Water Heater System1. Ensure the system is fully connected. Allow syst

Mighty StackPage 21Figure 8. Logic Diagram, ON/OFF Water Heater.control (F1 and F2). The ignition control will remain in this fault mode, with the bl

Laars Heating SystemsPage 229. After placing the appliance in operation, the Burner Safety Shutoff Device must be tested. To test: (a) Close gas

Mighty StackPage 23SECTION 7.Maintenance7.1 System Maintenance1. Lubricate the system water-circulating pump, if required, per the instructions on t

Laars Heating SystemsPage 247.2.4 Manual Reset High Limit ControlThe high limit switch is a manual reset, non-adjustable switch with a remote bulb-

Mighty StackPage 25sensors from all components that are attached to the inlet/outlet header.4. Isolate the heat exchanger from the water supply.5. D

Laars Heating SystemsPage 26SECTION 8.Trouble Shooting8.1 Resolving LockoutsThere are many causes of lockouts. The three most common causes are: (1

Mighty StackPage 27Item Description Size 199 Size 300 Size 399COMBUSTION CHAMBER COMPONENTS SeeFigure91 Assembly, Base 2C1000 3C1000 4C10002 Suppor

Laars Heating SystemsPage 28JACKET COMPONENTS SeeFigure101 Assembly, Base/Support 20L1000 30L1000 40L10002 Weldment, Base

Mighty StackPage 29CONTROL PANEL COMPONENTS SeeFigure131 Switch, Pressure, Diaphragm, SPST E0255500 E0255500 E02555002 Switch, Pressure, Di

Mighty StackPage 3SECTION 1.General InformationIn the Commonwealth of Massachusetts, this appliance must be installed by a licensed plumber or gas tt

Laars Heating SystemsPage 30Figure 9. Combustion Chamber Components.

Mighty StackPage 31Figure 10. Jacket Components.

Laars Heating SystemsPage 32Figure 11. Heat Exchanger Components.

Mighty StackPage 33Figure 12. Gas Train Components.

Laars Heating SystemsPage 34Figure 13. Control Panel Components.

Mighty StackPage 35Figure 14. Pump Assembly Components.

H2350400-®800.900.9276 • Fax 800.559.1583 (CustomerService,ServiceAdvisors)20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355

Laars Heating SystemsPage 41.2 Model IdenticationConsult the rating plate on the unit. The following information describes the model number struct

Mighty StackPage 5Figure 1. Dimensional Data.*Air and vent connections may be on top or back of the Mighty Stack, and are eld convertible.Size A B C

Laars Heating SystemsPage 61.6 Locating Appliance for Correct Horizontal Vent/Ducted Air Distance From Outside WallThe forced draft combustion air

Mighty StackPage 7Figure 2. Combustion Air and Vent Through Roof.SECTION 2. Venting and Combustion Air WARNINGFor indoor installations, as an addition

Laars Heating SystemsPage 82.1.2 Intake Combustion AirThe combustion air can be ducted through the wall, or through the roof. When taken from the w

Mighty StackPage 9Term DescriptionPipe Must comply with UL Standard 1738 such as Type AL29-4C Stainless Steel(either insulated or non-insulated).Joint