State Water Heaters Tankless On-Demand 705 Series 200 manual

— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of th is or any other appliance. — WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electrical s witch; do not use any phone in your building. • Immediately call y our gas supp lier from a neighbor’s phone. Follow the [...]

2 305, 505, 705 Indoor Manual Specifications ..................................................... 3 Consumer Safety Information Safety Definitions ............................................. 4 Safety Behaviors and Practices ....................... 4 Safety Features ............................................... 4 Description of Operation ......[...]

305, 505, 705 Indoor Manual 3 Specifications Specifications are subject to chan ge without prior notice. The maximum inlet gas pressure must not exceed the va lue specified by the manufacture r. The minimum value listed is for the purpose of input adjustment. * Minimum flow may vary slightly depending on the te mperature se tting and the inlet wate[...]

4 305, 505, 705 Indoor Manual W ARNING Safety Behavior and Practices • Keep the area around the appliance clear and free from combustible materials, gasolin e, and other flammable vapors and liquids. • Do not use this appliance if any part has been u nder water. Immediately call a qualified service technician to inspect the applian ce and to re[...]

305, 505, 705 Indoor Manual 5 This appliance is one of the most advan ced water heaters available. It provides a continuous supply of hot water at a preset temperature. This appliance i s direct vent where air is brought in from the outsi de and combustion gases are exh austed to the outside. While electricity, water, and gas sup plies are connecte[...]

6 305, 505, 705 Indoor Manual Setting the T emperature 1. Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is controlling the temperature and that the water heater is ready to supply hot water. While any hot water is being provided, the temperature setting can only be [...]

305, 505, 705 Indoor Manual 7 T emperature Ranges This water heater will attempt to prov ide hot water at the temperature setti ng even when the water flow is varied or when more than 1 tap is in use. The water h eater c an deliver water at only one temperature setting at a time. The available temperatures for a given model a re provided below. Sug[...]

8 305, 505, 705 Indoor Manual W ARNING Turn off the electrical power sup ply, the manual gas valve and the manual water control valve whenever servicing the unit. Repairs and maintenance should be p erformed by a qualified service technician. The appliance should be inspected annually by a qualified service technicia n. Verify proper operation afte[...]

305, 505, 705 Indoor Manual 9 Error Codes This appliance has the ability to che ck its own operation continuously. If a fault occurs, an error code will flash on the Display of the temperature controller. This assist s with diagnosing the fault and may enable you to overcome a problem without a service call. Please identify the code displayed whe n[...]

10 305, 505, 705 Indoor Manual Code Fault Remedy 14 Thermal Fuse Check gas type of unit and ensure it matches gas type being use d. Check for restrictions in air flow around unit and vent terminal. Check for low water flow in a circulating system causing sh ort-cycling. Ensure dip switches are set to the proper pos ition. Check for foreign material[...]

305, 505, 705 Indoor Manual 11 T rouble Shooting for Common Issues I don’t have any hot w ater when I open the tap. Make sure there is gas, water, and ele ctricity to the water heater (power is turned on an d the gas is turned on). When I was using the hot w ater, the water got cold. If you adjusted the flow from the tap to lessen it, you may hav[...]

12 305, 505, 705 Indoor Manual Flushing the Heat Exchang er (Error Code: LC or 00) An “LC” or “00” error code indicates the unit is beginni ng to lime up and must be flushed. Failu re to flush the appliance will cause dam age to the heat exchanger. Dama ge caused by lime build-up is not covered by the unit’s warranty. After flushing, rese[...]

305, 505, 705 Indoor Manual 13 Only properly trained and q ualified installers should install this appliance. The warranty may be voided due to improper installation or installation by a non-qualified installer. It is highly recommended that all installers attend a product knowledge cla ss. General Instructions • This appliance must be installed [...]

14 305, 505, 705 Indoor Manual Clearances from Appliance 1. Identify the installati on location and confirm that the installation will meet all required clea rances. 2. Securely attach the water heater to the wall using any of the holes in the wall installation brackets which are at the top and bottom of the water heater. Ensure that the attachment[...]

305, 505, 705 Indoor Manual 15 G a s P i p i n g General Instructions • A manual gas control valve must be placed in the gas supply line to the water heater. A union can be used on the connection above the shut off valve for the future servicing or disconnection of the unit. • Check the type of gas and the gas inlet pressu re before connecting [...]

16 305, 505, 705 Indoor Manual Pipe Sizing Procedure - Example 1. Determine the cubic feet per hour of ga s required by dividing the gas input (on the rating plate) by the heat ing value of the gas (available from the local gas compan y). The gas input needs to include all gas produ cts at the location and the maximum BTU usage at full load whe n a[...]

305, 505, 705 Indoor Manual 17 The freeze protection features inclu de electrical heating elements and intermittent firing of the burner. Freeze protection may be disabled if ele ctricity or gas is not supplied, or if ther e is an error preventing the water heater from functioning. Loss of freeze protection may result in water damage from a burst h[...]

18 305, 505, 705 Indoor Manual Freeze Protection Piping Warranty does not cover d amage due to freezing. When electrical power and gas are supplied to the water heater, it will not freez e in environments as cold as -30º F when protected from direct wi nd exposure. In the event of a power failure at temperatures below freezing the water heater sho[...]

305, 505, 705 Indoor Manual 19 Recommended Piping for Basic Installation G a s S u p p l y 3 / 4 " C o l d W a t e r S u p p l y L i n e 3/4" Ho t Wat e r Su pply Li ne Equipment Li s t Water Heat ers Kit (Optiona l) (3/4" F itt in g s Incl ude: 2 U nion s, 2 Ball Valv es, 2D r a i n V a l v e s a n d 1 P res sure Relief Valve. ) QTY[...]

20 305, 505, 705 Indoor Manual Recommended Piping for Circulation Systems Pressure R elief Val ve 3/4" Ball Va lve 3/4" Union Check Valve S Pressure Regula tor Circu lating Pump Soleno id Valve Boiler Drain Va lve KEY Minimum 3/4" Cold Water Supply Line Electric Water Heate r Build ing Fixture s Buildi ng Supp ly E x p a n s i o n T [...]

305, 505, 705 Indoor Manual 21 Optional Piping for Circulation Systems Pressure Relief Valve 3/4" Ball Valve 3/4" Un ion Check Valve S Pressure Regula tor Circulating Pump Soleno id Valve Boiler Drain Va lve KEY Minim um 3 /4" H ot Wat er Supply Li ne B u i l d i n g F i x t u r e O u t l e t s (Optional) 2-6 Gallon Storage Tank (To [...]

22 305, 505, 705 Indoor Manual • Vertical terminations must incorporate a condensate drain and trap as close as possibl e to the appliance. • Slope any horizontal venting 1/4 inch per foot (19 mm / m), towards the heater if the condensate collector is used, or towards the exhau st terminal if the condensate collector is not used. • Dispose of[...]

305, 505, 705 Indoor Manual 23 Example: If you have one elbow then your maximum vent l ength is 35 feet (10.7 m). If your actual length is greater than 15 ft (4.6 m) then move dip switch no. 1 (SW1) to OFF. Maximum Vent Length 1. Determine the number of 90 degree elb ows in the v ent system. (Two 45 degree elbows count as one 90 degree elbow.) 2. R[...]

24 305, 505, 705 Indoor Manual Listed and Tested Vent Products for the 305 and 505 Models Manufacturer Product Parts Ubbink Rolux Vent System Heat-Fab Saf-T Vent SC system Metal-Fab Co rr/Gua rd Vent/Air Intake System Refer to the manufacturer’s technical literatu re for specific part numbers and instruction s. Listed and Tested Vent Products for[...]

305, 505, 705 Indoor Manual 25 Flue T erminal Clearances ( ANS Z21.10.3 ● C S A 4 . 3 ) INS I DE CO RN ER D E TAI L FIXED CLOSED OPERABLE FIXED CLOSED OPERABLE B B B A J B M C F B B E D L G A H K I 1 A vent shall not terminate directl y above a sidewalk or paved driveway that is loca ted between two single family dwellings and serves both dwellin[...]

26 305, 505, 705 Indoor Manual 24" V Additional Clearances - V ent T erminal Local codes supersede the se clearances. • Avoid termination locations near a dryer vent. • Avoid termination locations near commercial cooking exhaust. 60" V V (1.52 m) between water heater terminals at different levels 12" 12" 36" INSIDE CORN[...]

305, 505, 705 Indoor Manual 27 Flue Installation for the 305 and 505 Models 3 in (75 mm) minimum Condensate Trap Vertical Termination (condensate collector must be used in all installations) 3 in (75 mm) minimum 3 in (75 mm) minimum Horizontal Termination using the Condensate Collector 3 in (75 mm) minimum Condensate Trap To adjust the condensate c[...]

28 305, 505, 705 Indoor Manual Air Intake Assembly The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of semi-rigid flexible aluminum ducting can also b e used. Foil wrapped dryer vent and cell core p roducts are not authorized. The air intake has a zero cleara nce[...]

305, 505, 705 Indoor Manual 29 Vertical Terminations The air intake requires a re turn bend or two 90º elbows to prevent e ntry of rain. SLOPE INTAKE AND EXHAUST TOWARD OUTSIDE TERMINATION MINIMUM 1/4" PER FOOT Horizontal with Concentric Termination Flue Installation for the 705 Model The vent termination and air intake must be in the same pr[...]

30 305, 505, 705 Indoor Manual High Altitude Installations Set dip switches 2 and 3 to the values shown in table below for your altitude. The default setting for the appliance is 0-2000 ft (0-610 m) with swit ches No. 2 and No. 3 in the OFF position. Connecting Multiple W ater Heaters The 2-Unit connection cabl e is an optional acce ssory that conn[...]

305, 505, 705 Indoor Manual 31 Co n t r o l l e r s T emperature Controller Installation • The controller should be out of reach of small children. • Avoid locations where the controller may become hot (near the oven or radiant heater). • Avoid locations in direct sunlight. The digital display may be difficult to read in direct sunlight. • [...]

32 305, 505, 705 Indoor Manual T emperature Controller Installation 1. Determine a suitable location for the controller. 2. Make three holes in the wall as shown. 3. Run the cable between the controller and the water heater or the controller and the other controller. 4. Remove the face plate from the temperature controller using a screwd river. 5. [...]

305, 505, 705 Indoor Manual 33 Operating Instructions FOR YOUR SAFETY READ BEFORE OPERA TING A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floo[...]

34 305, 505, 705 Indoor Manual 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 0 2 55 07 5 1 0 0 1 2 5 1 5 0 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 0 2 4 6 8 10 12 T echnical Data Pressure Drop Curve Outlet Flow Data Water Flow (gpm) delta T - Temperature Rise (ºF) 505 305 Pressure Loss (ft head) Pressure Loss (psi) Water Flow ([...]

305, 505, 705 Indoor Manual 35 Space Heating If the water heater is to be used for both water (potable) heating and space heati ng then the following apply. • The piping and components co nnected to the water heat er shall be suitable for use with potable water. • Toxic chemicals, such as used for boiler treatment, shall not be introduced into [...]

36 305, 505, 705 Indoor Manual D i m e n s i o n s * This is the minimum dimension from t he wall. The wall bracket is adjustable to allow an additional 1.57 inches (40 mm). A B C D K I J G F H E 305 and 505 Models 705 Model DIM DESCRIPTION 305 505 in (mm) 705 in (mm) A Width 14 (355.6) 18.5 (470) B Depth * 9.6 (244.5) 9.1 (230.5) C Height - Unit 2[...]

305, 505, 705 Indoor Manual 37 Ladder Diagram RELAY 1 IG FROST SENSI NG SWI TCH ANT I- FRO S T HEA TER IG N IT IO N COMB USTI ON FA N 3A (F U S E ) HOT NE UT R AL VA RI S TO R DC1 2 .6V SOLENO ID D R IV IN G CI RC U I T CP U CENT RA L PR OC E SS IN G UNIT FA N REMOTE CONTROLLER POV FA N CONTROL CI RCUI T BY - PASS FLO W CONTROL DE VI C E CI RC U I [...]

38 305, 505, 705 Indoor Manual W arranty What is covered? This Warranty covers any defects in materials o r wo rkmanship when the product is installed and operated according to written installation instructions, subje ct to the terms within this Limited Warranty document. This Warranty applies only to products that ar e installe d by a factory auth[...]

305, 505, 705 Indoor Manual 39 W arranty How do I get service? You must contact a factory authorized/lic ensed contractor or autho rized service provider for the repair of a product under this Warranty. For the name of a qualified/auth ori zed service provider please contact your place of purchase, call 1-866-677-4 960 or write to 500 Tenn essee Wa[...]

U287-084 (00) Printed in Japan 09.01[...]