Page 2 - Table of Contents
2 305, 505, 705 Indoor Manual Specifications ..................................................... 3 Consumer Safety Information Safety Definitions ............................................. 4 Safety Behaviors and Practices ....................... 4 Safety Features ..................................
Page 3 - Specifications; Model
305, 505, 705 Indoor Manual 3 Specifications Specifications are subject to change without prior notice. The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value listed is for the purpose of input adjustment. * Minimum flow may vary slightly depending ...
Page 4 - WARNING; Safety Behavior and Practices; DANGER; Consumer Safety Information; Safety Features
4 305, 505, 705 Indoor Manual WARNING Safety Behavior and Practices • Keep the area around the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids. • Do not use this appliance if any part has been under water. Immediately call a qualified service tec...
Page 5 - Description of Operation; Features Available on Temperature Controllers; Operating Instructions; Features; Description
305, 505, 705 Indoor Manual 5 This appliance is one of the most advanced water heaters available. It provides a continuous supply of hot water at a preset temperature. This appliance is direct vent where air is brought in from the outside and combustion gases are exhausted to the outside. While elec...
Page 6 - Setting the Temperature; Temperature Options Without a Temperature Controller; NOTICE; NOTICE
6 305, 505, 705 Indoor Manual Setting the Temperature 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 p...
Page 7 - Temperature Ranges; Setting; Commercial Controller; Re-setting the Maximum Temperature
305, 505, 705 Indoor Manual 7 Temperature Ranges This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time. The available temperatur...
Page 8 - Maintenance
8 305, 505, 705 Indoor Manual WARNING Turn off the electrical power supply, the manual gas valve and the manual water control valve whenever servicing the unit. Repairs and maintenance should be performed by a qualified service technician. The appliance should be inspected annually by a qualified se...
Page 9 - Error Codes; Code; Error
305, 505, 705 Indoor Manual 9 Error Codes This appliance has the ability to check its own operation continuously. If a fault occurs, an error code will flash on the Display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem without a servic...
Page 11 - Trouble Shooting for Common Issues; I don’t have any hot water when I open the tap.; Water Quality
305, 505, 705 Indoor Manual 11 Trouble Shooting for Common Issues I don’t have any hot water when I open the tap. Make sure there is gas, water, and electricity to the water heater (power is turned on and the gas is turned on). When I was using the hot water, the water got cold. If you adjusted the ...
Page 12 - Water Heater; Circulating Pump
12 305, 505, 705 Indoor Manual Flushing the Heat Exchanger (Error Code: LC or 00) An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the un...
Page 13 - General Instructions; Installation Instructions
305, 505, 705 Indoor Manual 13 Only properly trained and qualified 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 class. General In...
Page 14 - to Combustibles
14 305, 505, 705 Indoor Manual Clearances from Appliance 1. Identify the installation location and confirm that the installation will meet all required clearances. 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...
Page 15 - Gas Piping; Electrical
305, 505, 705 Indoor Manual 15 Gas Piping 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...
Page 16 - Length
16 305, 505, 705 Indoor Manual Pipe Sizing Procedure - Example 1. Determine the cubic feet per hour of gas required by dividing the gas input (on the rating plate) by the heating value of the gas (available from the local gas company). The gas input needs to include all gas products at the location ...
Page 17 - Freeze Protection; Water; Pressure Relief Valve
305, 505, 705 Indoor Manual 17 The freeze protection features include electrical heating elements and intermittent firing of the burner. Freeze protection may be disabled if electricity or gas is not supplied, or if there is an error preventing the water heater from functioning. Loss of freeze prote...
Page 19 - Recommended Piping for Basic Installation
305, 505, 705 Indoor Manual 19 Recommended Piping for Basic Installation Gas Supply 3/4" Cold Water Supply Line 3/4" Hot Water Supply Line Equipment List Water Heaters Kit (Optional)(3/4" Fittings Include:2 Unions, 2 Ball Valves,2 Drain Valves and1 Pressure Relief Valve.) QTY 1 1 3/4"...
Page 20 - Recommended Piping for Circulation Systems
20 305, 505, 705 Indoor Manual Recommended Piping for Circulation Systems Pressure Relief Valve 3/4" Ball Valve 3/4" Union Check Valve S Pressure Regulator Circulating Pump Solenoid Valve Boiler Drain Valve KEY Minimum 3/4" Cold Water Supply Line Electric Water Heater Building Fixtures B...
Page 21 - Optional Piping for Circulation Systems
305, 505, 705 Indoor Manual 21 Optional Piping for Circulation Systems Pressure Relief Valve 3/4" Ball Valve 3/4" Union Check Valve S Pressure Regulator Circulating Pump Solenoid Valve Boiler Drain Valve KEY Minimum 3/4" Hot Water Supply Line Building Fixture Outlets (Optional)2-6 Gallon...
Page 22 - Venting; Condensate
22 305, 505, 705 Indoor Manual • Vertical terminations must incorporate a condensate drain and trap as close as possible 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 exhaust terminal if the cond...
Page 23 - Maximum Vent Length
305, 505, 705 Indoor Manual 23 Example: If you have one elbow then your maximum vent length 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 elbows in the vent system. (Two 45 de...
Page 24 - Ubbink
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 Corr/Guard Vent/Air Intake System Refer to the manufacturer’s technical literature for specific part numbers and instr...
Page 25 - Flue Terminal Clearances (
305, 505, 705 Indoor Manual 25 Flue Terminal Clearances ( ANS Z21.10.3 ● CSA 4.3) INSIDECORNER DETAIL FIXEDCLOSED OPERABLE FIXEDCLOSED 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 directly above a sidewalk or paved driveway that is located between two single family dwe...
Page 26 - Additional Clearances - Vent Terminal; INSIDE
26 305, 505, 705 Indoor Manual 24" V Additional Clearances - Vent Terminal Local codes supersede these 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 leve...
Page 27 - Vertical Termination; (condensate collector must be used in all installations); Horizontal Termination using
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) ...
Page 28 - Horizontal Terminations; Flue; GRADE OR
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 be used. Foil wrapped dryer vent and cell core products are not ...
Page 29 - Vertical Terminations; Horizontal with Concentric Termination
305, 505, 705 Indoor Manual 29 Vertical Terminations The air intake requires a return bend or two 90º elbows to prevent entry 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 ter...
Page 30 - Number of Connected Water Heaters:; or; Guidelines
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 switches No. 2 and No. 3 in the OFF position. Connecting Multiple Water Heaters The 2-Unit conne...
Page 31 - Temperature Controller Installation; Configurations
305, 505, 705 Indoor Manual 31 Controllers Temperature 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 difficul...
Page 32 - Outline of Remote; CABLE CLAMP; Mounting the Controller; Outline of Controller
32 305, 505, 705 Indoor Manual Temperature 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...
Page 33 - CLOSE
305, 505, 705 Indoor Manual 33 Operating Instructions FOR YOUR SAFETY READ BEFORE OPERATING 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 applianc...
Page 34 - Technical Data; Pressure Lo
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 25 50 75 100 125 150 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 Technical Data Pressure Drop Curve Outlet Flow Data Water Flow (gpm) delta T - Temperature Rise (ºF) 505 305 Pressure Lo ss ...
Page 35 - Temperature Setting
305, 505, 705 Indoor Manual 35 Space Heating If the water heater is to be used for both water (potable) heating and space heating then the following apply. • The piping and components connected to the water heater shall be suitable for use with potable water. • Toxic chemicals, such as used for boil...
Page 36 - Dimensions; DIM DESCRIPTION
36 305, 505, 705 Indoor Manual Dimensions * This is the minimum dimension from the 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...
Page 37 - CPU
305, 505, 705 Indoor Manual 37 Ladder Diagram RELAY 1 IG FROST SENSING SWITCH ANTI-FROST HEATER IGNITION COMBUSTION FAN 3A(FUSE) HOT NEUTR AL VARISTOR DC12.6V SOLENOID DRIVING CIRCUIT CPU CENTRAL PROCESSING UNIT FA N REMOTE CONTROLLER P O V FAN CONTROL CIRCUIT BY-PASS FLOW CONTROL DEVICE CIRCUIT THE...
Page 38 - Warranty; How long does coverage last?
38 305, 505, 705 Indoor Manual Warranty What is covered? This Warranty covers any defects in materials or workmanship when the product is installed and operated according to written installation instructions, subject to the terms within this Limited Warranty document. This Warranty applies only to p...
Page 39 - How do I get service?; Limitation on implied warranties
305, 505, 705 Indoor Manual 39 Warranty How do I get service? You must contact a factory authorized/licensed contractor or authorized service provider for the repair of a product under this Warranty. For the name of a qualified/authorized service provider please contact your place of purchase, call ...
