Marathon MR50245 Instruction Manual Page 1

The purpose of this manual is twofold: one, for the installer,to provide requirements and recommendations for the prop-er installation and adjustment

8AA..Do turn off power to water heater if it has been subjected to over heating,fire, flood or physical damage.BB..Do Not turn on water heater unless

9OperationRREESSEETTTTIINNGG TTHHEE UUPPPPEERR TTHHEERRMMOOSSTTAATT —— It is recommended that theupper thermostat remain at the factory setting for

10BB..Remove the four (4) screws securing the thermostat access panel andthe two (2) thermostat insulation pads, exposing the thermostat. Theplastic p

Properly maintained, your new, non-metallic water heater will provide years ofdependable trouble-free service. It is suggested that a routine preventi

33.. HHEEAATTIINNGG EELLEEMMEENNTTSS ——Most water supplies will cause scale or mineral deposits to form on theheating elements. As the scale forms, i

44.. VVAACCAATTIIOONN AANNDD LLOONNGG TTIIMMEE SSHHUUTTDDOOWWNN ——If the water heater is installed where it could freeze (summer cabin, lakehome,

NOTICEFOR INSTALLATIONS IN THE STATE OF CALIFORNIACalifornia Law requires that residential water heaters must be braced, anchored or strapped to resis

Table of ContentsGGeenneerraall SSaaffeettyy PPrreeccaauuttiioonnss .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

1WATER TEMPERATURE ADJUSTMENT - Safety and ener-gy conservation are factors to be considered when select-ing the water temperature setting of water he

211.. IINNSSPPEECCTT SSHHIIPPMMEENNTT —— Inspect water heater for possible damage.Check the markings on the rating plate of the water heater to be

3InstallationFigure 2 — Typical installation methods using Water Heater Installation Kit (top), Soldered Copper or CPVC Pipe (center), or Threaded P

33.. WWAATTEERR SSUUPPPPLLYY CCOONNNNEECCTTIIOONNSS ——Refer to Fig. 2 for suggested typicalinstallation. The installation of unions or flexible co

5InstallationTo prevent stress on the relief valve fitting, which may damage the tank,support the drain pipe using metal strapping or similar method t

6The complete wiring schematic diagram for standard non-simultaneous operation units is shown below in Figure 6.power supply provided is equivalent to

Limit Switch must be disconnected and replaced totally, or discon-nected and joined with a new section of wire using a proper con-nector. Be sure to f