Laarsen Associates IW Manuale Utente

FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,qualified in hot water heater installation and maint

LAARS HEATING SYSTEMSPage 102H. Pump Performance and Installation1. The factory provided pump on PW heaters andthe recommended field provided pump for

Mighty Therm Volume Water HeaterPage 11Figure 11. Hot Water Supply System (Model VW & PW).WithVerticalTankWithHorizontalTankNOTES:Heavy line indic

LAARS HEATING SYSTEMSPage 12CAUTION:1. This piping arrangement is required on split systems to provide constant hot water temperatures.2. Pipe size an

Mighty Therm Volume Water HeaterPage 13Figure 15. Single Installation Piping Diagram, Model IW.Figure 14. Dual Installation Piping Diagram, Model IW.N

LAARS HEATING SYSTEMSPage 14Figure 16. Two-Temperature Hot Water Supply System (Model VW or PW).WithVerticalTankWithHorizontalTankLegendB - Check Valv

Mighty Therm Volume Water HeaterPage 15Figure 17. Two-Temperature Hot Water Supply System with Vertical Tank for Models VW and PW Water Heaters.Legend

LAARS HEATING SYSTEMSPage 162I. Water PressureIt is very important that water pressure in thesystem be maintained above 30 psi. If the systempressure

Mighty Therm Volume Water HeaterPage 17proven to be lit. Whenever the pilot flame isinterrupted, the main gas valve closes within0.8 seconds.b. Electr

LAARS HEATING SYSTEMSPage 18gas supply, the automatic safety shutoff devices mustbe checked.1. Before beginning the tests, make sure the mainmanual ga

Mighty Therm Volume Water HeaterPage 19depressed for one minute then release. Once the pilotis lit, the power is supplied through the aquastat to them

LAARS HEATING SYSTEMSPage 2SECTION 1.General Information1A. Introduction... 31B. Heater Identification

LAARS HEATING SYSTEMSPage 20Lower the front of the burner (to avoid damagingpilot shield) then remove the burner tray.CautionBlack carbon or green soo

Mighty Therm Volume Water HeaterPage 21II. HEATER IS POUNDING, KNOCKING OREMITTING STEAM FROM RELIEF VALVES. Possible Cause

LAARS HEATING SYSTEMSPage 22Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 18251 Top Pane

Mighty Therm Volume Water HeaterPage 23Figure 22. Parts Identification.NOTE:Temperature Control Wells -Inlet/Outlet Header1. Firing Mode L, K, & C

LAARS HEATING SYSTEMSPage 24Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 182521 Tile, H

Mighty Therm Volume Water HeaterPage 25Figure 23. Tile Assemblies.

LAARS HEATING SYSTEMSPage 26Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 182543 Ignitio

Mighty Therm Volume Water HeaterPage 27Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 182

LAARS HEATING SYSTEMSPage 28Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 182589 Plug, 3

Mighty Therm Volume Water HeaterPage 29Figure 21. Outdoor Parts.

Mighty Therm Volume Water HeaterPage 3SECTION 1.General Information1A. IntroductionThis manual provides information for theinstallation and operation

LAARS HEATING SYSTEMSPage 30Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 18251 Top Pane

Mighty Therm Volume Water HeaterPage 31Key Description Model Model Model Model Model Model Model Model ModelNo 500 600 715 850 1010 1200 1430 1670 182

Pump Rotating Sections and Repair PartsCheck pump assembly on heater for H.P. rating and find correct Laars part number from table below.Description 1

LAARS HEATING SYSTEMSPage 41C. Flow RequirementsFor proper operation, all low volume hot waterheaters must have continuous flow through the heatexchan

Mighty Therm Volume Water HeaterPage 5Figure 2. Typical Heater Installation with Base forCombustible Floors, Example A.Figure 3. Typical Heater Instal

LAARS HEATING SYSTEMSPage 62B-1. Combustion Air Supply1. The heater location must provide sufficient airsupply for proper combustion and ventilation o

Mighty Therm Volume Water HeaterPage 7maintain clearances and prevent physical damageand separation of joints.4. Avoid ending heater vents near air co

LAARS HEATING SYSTEMSPage 84. The boiler and its individual shutoff valve must bedisconnected from the gas supply piping systemduring any pressure tes

Mighty Therm Volume Water HeaterPage 9Special attention must be given to relief valvesettings in installations where the heater islocated on the groun