John-wood Takagi - 240H-340H-540H User Manual download pdf (Page 23)

23 Page

-Pressure relief valve-

Thewaterheaterhasahigh-temperatureshutoffswitchbuilt inasastandardsafetyfeature(calleda

Hi-Limitswitch)thereforea“pressure only” relief valve is required.

• Thisunitdoesnotcomewithanapprovedpressurereliefvalve.

• Anapprovedpressurereliefvalvemustbeinstalledonthehotwateroutlet.

• The pressure relief valve must conform to CAN 1-4.4andinstallationmustfollowlocalcodes.

• The discharge capacity must be at least 160,000BTU/hfortheT-H3J-DV/240H,180,000BTU/hforthe

T-H3S-DV/340H,and199,000BTU/hfortheT-H3-DV/540H.

• Thepressurereliefvalveneedstoberatedforamaximumof1MPa(150psi).

• Thedischargepipingforthepressurereliefvalvemustbedirectedsothatthehotwatercannotsplash

on anyone or on nearby equipment.

• Attach the discharge tube to the pressure relief valve and run the end of the tube to within 152

mm(6in.)fromthefloor.Thisdischargetubemustallowfreeandcompletedrainagewithoutany

restrictions.

• Ifthepressurereliefvalveinstalledonthewaterheaterdischargesperiodically,thismaybeduetoa

defective thermal expansion tank or defective pressure relief valve.

• The pressure relief valve must be manually operated periodically to check for correct operation.

• Novalvemustbeplacedbetweenthereliefvalveandthewaterheater.

CONDENSATE DRAIN

• Thewaterheaterdoesnotincludeabuilt-incondensateneutralizercartridgeforreducingthepHlevel

ofcondensatewater.Iflocalcodesdictatethatcondensatemustbeneutralizedpriortodrainage,a

condensate neutralizer must be installed. An accessory Neutralizer assembly is sold separately.

• In the absence of applicable local codes and regulations, the manufacturer recommends that

condensate be disposed of into a standard drain. Connect a drain tube from the condensate drain port

(shownbelow)locatedonthebottomofthewaterheatertoastandarddrain.

Installaon

Installaon Manual

Follow all code requirements

of the local authority on

condensate neutralizers and

whetherornottheyarerequired

for the installation.

Condensate drain port

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John-wood Takagi - 240H-340H-540H User Manual Page 23