A.O. Smith ProLine Master Installation Manual

ManualsBrandsA.O. Smith Tank ManualsWater HeatersA.O. Smith ProLine® Master - 240V Single Phase Water Heater - 40 Gal. Storage - 55 Gal. First Hour Delivery - 0.92 UEF - Short

100309797_2000561860_REV_B

Residen al Electric

Water Heater

Installa on Instruc ons and

Use & Care Guide

Keep this manual in the pocket on heater for future reference whenever maintenance, adjustment or service is required.

Retain your original receipt as proof of purchase.

LOW LEAD

NTENT

Read this manual and the labels on the water heater before you install,

operate, or service it. If you have diﬃ culty following the direc ons, or

aren’t sure you can safely and properly do any of this work yourself:

• Call your local plumbing supplies store to have this water heater installed. Pro-

fessional Installation is available for this product and the work is guaranteed.

• Schedule an appointment with a qualified person to install your water heater.

Call our Technical Assistance Hotline which is listed on the water heater’s war-

ranty sheet. We can help you with installation, operations, troubleshooting, or

maintenance. Before you call, write down the model and serial number from

the water heater’s data plate.

Incorrect installa on, opera on, or service can damage the water heater, your house

and other property, and present risks including ﬁ re, scalding, electric shock, and

explosion, causing serious injury or death.

AHRI Cer ﬁ ca on® applies to residen al electric water heaters with rated capaci es

of 20 to 120 gallon and input ra ngs of 12 kw or less.

Table of Contents Page

IMPORTANT SAFETY INFORMATION ................................. 3

GETTING STARTED ............................................................ 6

INSTALLATION ...................................................................7

TROUBLESHOOTING .......................................................17

MAINTENANCE ............................................................... 20

DIAGRAMS .....................................................................24

REPAIR PARTS ..........................................................25

September, 2020

Summary of content (28 pages)

PAGE 1
Installa on Instruc ons and Use & Care Guide Residen al Electric Water Heater Read this manual and the labels on the water heater before you install, operate, or service it. If you have diﬃculty following the direc ons, or aren’t sure you can safely and properly do any of this work yourself: • Call your local plumbing supplies store to have this water heater installed. Professional Installation is available for this product and the work is guaranteed.
PAGE 2
COMPLETED INSTALLATION TYPICAL Water shut oﬀ Expansion tank Hot water line Cold water line Electrical junc on box T&P relief valve Upper Element and Thermostat access ECO Reset Bu on (on most models) T&P discharge pipe Lower Element and Thermostat access Drain pan discharge pipe Drain pan Drain valve
PAGE 3
Read and follow all safety messages and instruc ons in this manual. This is the safety alert symbol. It is used to alert you to poten al physical injury hazards. Obey all safety messages that follow this symbol to avoid possible property damage, serious injury or death. Do not remove any permanent instruc ons, labels, or the data plate from either the outside of the water heater or on the inside of the access panels. Keep this manual near the water heater.
PAGE 4
SAFETY IMPORTANT SAFETY INFORMATION T o reduce the risk of property damage, serious injury or death, read and follow the precau ons below, all labels on the water heater, and the safety messages and instruc ons throughout this manual.
PAGE 5
According to a na onal standard American Society of Sanitary Engineering (ASSE 1070) and most local plumbing codes, the water heater’s thermostat should not be used as the sole means to regulate water temperature and avoid scalds. Properly adjusted Thermosta c Mixing Valves installed at each point-of-use allow you to set the tank temperature to a higher se ng without increasing risk of scalds.
PAGE 6
GETTING STARTED Review all of the instruc ons before you begin work. Improper installa on can damage the water heater, your home and other property, and can present risks of serious injury or death. GETTING STARTED 1 Figure 1 - Flexible connectors use compression fittings and do not require soldering. Check with your local and state authori es for any local or state codes that apply to your area.
PAGE 7
INSTALLATION ✓ Follow these steps for proper installa on: Water pressure increase caused by thermal expansion ✓ Verify that your home is equipped and up-to-date for proper opera on Installing a new water heater is the perfect me to examine your home’s plumbing system and make sure the system is up to current code standards. There have likely been plumbing code changes since the old water heater was installed.
PAGE 8
INSTALLATION INSTALLATION BACKGROUND: Water expands when heated, and the increased volume of water must have a place to go, or thermal expansion will cause large increases in water pressure (despite the use of a Pressure Reducing Valve on the home’s main water supply line). The Safe Drinking Water Act of 1974 requires the use of backflow preventers and check valves to restrict water from your home reentering the public water system.
PAGE 9
INSTALLATION 5 The loca on is not prone to physical damage by vehicles, flooding, or other risks. Before installing your water heater, ensure that: 1 • In an area that will not freeze • In an area that is suitable for installing the water heater vertically 2 The loca on has adequate space (clearances) for periodic servicing. 3 The floor can support the weight of a full water heater. Your area is not prone to earthquakes. If it is, use special straps as required by local building codes.
PAGE 10
INSTALLATION 7 Turn the cold water supply valve OFF. 8 Open the drain valve on the water heater. Disconnect the water pipes. Many water pipes are connected by a threaded union which can be disconnected with wrenches. If you must cut the water pipes, cut the pipes close to the water heater’s inlet and outlet connec ons, leaving the water pipes as long as possible. If necessary, you can make them shorter later when you install the new water heater. 11 12 Remove the old water heater.
PAGE 11
INSTALLATION DO NOT CONNECT ELECTRICAL WIRING UNTIL YOU ARE INSTRUCTED TO DO SO. only copper or CPVC pipe. Do not use any other type of pipe, such as PVC, iron, flexible plas c pipe, or any type of hose. NOTICE: Connec ng electrical power to the tank before it is completely full of water (water must run FULL STREAM from a hot water tap for a full three minutes) will cause the upper hea ng element to burn out. Relief Valve.
PAGE 12
INSTALLATION Step 6: Install shutoﬀ and tempering valves If one is not already installed, install a manual shutoﬀ valve in the cold water line that supplies the water heater. Install the shutoﬀ valve near the water heater so that it is readily accessible. Only use valves that are compa ble with potable water. Use only full-flow ball or gate valves. Other types of valves may cause excessive restric on to the water flow.
PAGE 13
INSTALLATION NOTICE: Most water heater models contain energy saving heat traps in the inlet and outlet connec ons. Do not remove the heat traps. 2 Turn the cold water supply back on. Connect the hot water supply using 3/4 inch NPT to the hot water outlet. Follow the same connec on guidelines as for the cold water supply. 3 Full-flow ball valve Figure 15 - A Pressure Reducing Valve is required if your home’s water pressure is above 80 psi.
PAGE 14
INSTALLATION Step 9: Make electrical connec ons INSTALLATION WARNING! Working on an energized circuit can result in severe injury or death from electrical shock. NOTICE: The tank must be completely empty of air and full of water before connec ng electrical power to avoid “Dry Firing.” Dry Firing may result in the upper element burning out. This is a common installa on mistake.
PAGE 15
INSTALLATION • Fold the insulation back in place and replace the access panels. Replace the junc on box cover and secure with the screws provided. WARNING! Be sure panels are secured to reduce the risk of fire and electric shock. WARNING! Be sure cover is secured to reduce the risk of fire and electric shock. 2 Step 10: Adjus ng the Temperature With the installa on steps completed, you may adjust the water heater’s temperature se ng if desired. Set the thermostat(s) to desired temperature.
PAGE 16
INSTALLATION Step 11: Opera on The water heater is now ready for normal opera on. To keep your water heater working safely and eﬃciently and extend its life, perform maintenance according to the schedule on page 20. INSTALLATION Vaca on To save energy, lower the temperature se ng on the thermostat(s) if you plan to be gone for an extended me.
PAGE 17
TROUBLESHOOTING WARNING! When you are finished, be sure all covers are secured to reduce the risk of fire and electric shock.
PAGE 18
TROUBLESHOOTING 5 Check/Reset Energy Cut Oﬀ (ECO) Bu on. access panel. • Turn off the power to the water heater. WARNING! Be sure all covers are secured to reduce the risk of fire and electric shock. Insuﬃcient Hot Water or Slow Hot Water Recovery Figure 23 - Energy Cut Off (ECO) button The Energy Cut Oﬀ (ECO) shuts oﬀ power to the water heater’s elements if the temperature of the water in the tank gets too hot. If the ECO has tripped, you’ll have no hot water.
PAGE 19
TROUBLESHOOTING Temperature Too High If the water temperature is too hot: • Install or adjust the Thermostatic Mixing Valves for each point-of-use (see manufacturer’s instructions), or • Adjust the thermostat(s) on the water heater (see Step 10 in the installation section of this manual). A nonfunc oning thermostat or a shorted hea ng element can cause extremely hot water.
PAGE 20
MAINTENANCE Rou ne Maintenance Rou ne maintenance will help your water heater last longer and work better. If you can’t perform these rou ne maintenance tasks yourself, contact a qualified person. Water Heater Maintenance A er the first six months, drain and flush the water heater and inspect the anode rod. Depending on the hardness of your water, repeat this process at least annually, or more frequently if needed. From me to me, you may need to replace a hea ng element or a thermostat.
PAGE 21
MAINTENANCE If the sediment was present when the tank was drained, flush the tank by opening the cold water supply valve and le ng the water run un l no more sediment drains from the tank. Close the drain valve when you are done. hea ng element or thermostat yourself, have this work done by a qualified person. To replace the hea ng element, you’ll need the following tools and supplies: 8 NOTICE: Do not turn power back on un l the tank is completely full of water.
PAGE 22
MAINTENANCE Remove the upper or lower access panel on the water heater, and then fold back the insula on and remove the plas c element/thermostat cover. 5 the air removed and is completely full of water. Failure to perform this step can cause the upper hea ng element to burn out. Once you are certain the tank is completely full of water, close the hot water faucet. and check with a non-contact circuit tester before working on the water heater.
PAGE 23
MAINTENANCE 4 Make sure the replacement thermostat matches the original thermostat. 5 Mark the wires with tape so you’ll know how to put them back on. Disconnect the wires from the bad thermostat and remove the thermostat from the metal moun ng clip. 6 7 Install the new thermostat in the metal moun ng clip. Make sure the new thermostat fits snuggly against the tank. You should NOT be able to slip a business card between the thermostat and the tank.
PAGE 24
DIAGRAMS MAINTENANCE Thermostat Wiring Diagram 24 • Residen al Electric Water Heater Use and Care Guide
PAGE 25
REPAIR PARTS Part Descrip on 1 TEMPERATURE-PRESSURE RELIEF VALVE 2 SECONDARY ANODE ROD/NIPPLE w/HEAT TRAP* 3 ELEMENT w/GASKET 4 ELEMENT GASKET 5 LOWER OUTER DOOR 6 TERMINAL COVER (DOUBLE ELEMENT) 7 UPPER THERMOSTAT w/HI LIMIT (DOUBLE ELEMENT) 8 TERMINAL COVER 9 LOWER THERMOSTAT w/HI LIMIT (SINGLE ELEMENT) 10 TERMINAL COVER 11 LOWER THERMOSTAT (DOUBLE ELEMENT) 12 THERMOSTAT BRACKET (EA.
PAGE 26
REPAIR PARTS Key No. Repair parts may be ordered through your plumber, local distributor, home improvement center, or by calling Technical Assistance Hotline which is listed on the water heater’s warranty sheet.
PAGE 27
REPAIR PARTS Key No. Repair parts may be ordered through your plumber, local distributor, home improvement center, or by calling Technical Assistance Hotline which is listed on the water heater’s warranty sheet.