RINNAI DD HEX250 High Efficiency Heat Exchange Water Heater OWNERS GUIDE AND INSTALLATION INSTRUCTIONS APPLICABLE TO THE FOLLOWING SYSTEMS: D D 1 H E X 2 50F 200E N D D 1 H E X 2 50F 200IN D D 1 H E X 2 50F 200 E L D D 1 H E X 2 50F 200IL D D 2 H E X 2 50F 200 E N D D 2 H E X 2 50F 200IN D D 2 H E X 2 50F 200 E L D D 2 H E X 2 50F 200IL D D 3H E X 250F 200 E N D D 3H E X 250F 200IN D D 3 H E X 2 5 0 F 200 E L D D 3H E X 250F 200IL Important Notice for Installers Please leave these instructions with the
TABLE OF CONTENTS IMPORTANT INFORMATION & WARNINGS ........................................................................ 2 Scald Hazards ................................................................................................................................... 3 HD200 Heat Source .......................................................................................................................... 3 Horizontal Obstructions .......................................................................
IMPORTANT INFORMATION & WARNINGS Safety and Regulatory Information The Rinnai DDHEX250 High Efficiency Heat Exchange hot water system is Watermark Certified as a heat exchange water heater with an external energy source. The external energy sources referred to in this manual are specific Rinnai continuous flow water heater models. These water heaters have stand alone Watermark certificate number W208 and AGA Gas Certificate number 6330.
IMPORTANT INFORMATION & WARNINGS Scald Hazards Hot Water can cause scalds. Children, disabled, and the elderly are at the highest risk of being scalded. Feel water showering. temperature before bathing or Scalds from hot water taps can result in severe injuries to young children. Scalds can occur when children are exposed directly to hot water when they are placed into a bath which is too hot.
IMPORTANT INFORMATION & WARNINGS For detailed instructions on clearances refer to AS/NZS 5601 Fig. 6.2 and for all flueing requirements refer to separate flue instruction booklet supplied with the flue components. Horizontal Obstructions AS/NZS 5601 ‘Gas Installations’ stipulates a minimum horizontal clearance of 500 mm between a building structure and obstruction facing the terminal.
IMPORTANT INFORMATION & WARNINGS Water Quality Rinnai Warranty applies to water heaters connected to a water supply where the water chemistry and impurity levels DO NOT exceed the limits specified in Table - Water Characteristics below. Refer to separate product warranty booklet for more details.
SPECIFICATIONS DDHEX250 High Efficiency Heat Exchange Hot Water System Specifications DD1HEX250F200EN DD2HEX250F200EN DD3HEX250F200EN Models DD1HEX250F200IN DD1HEX250F200EL DD1HEX250F200IL DD2HEX250F200IN DD2HEX250F200EL DD2HEX250F200IL DD3HEX250F200IN DD3HEX250F200EL DD3HEX250F200IL Maximum rated capacity (L/Min).
SPECIFICATIONS Selection of DDHEX250 High Efficiency Heat Exchange Hot Water Systems First Hour Hot Water Delivery Litres 15-60°C 820 20 720 1560 32 1440 2300 45 2100 3120 65 2820 4600 90 4200 6910 136 6300 9200 181 8340 11500 226 10440 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 3x 3x 3x 3x 4x 4x 4x 4x 5x 5x 5x 5x Full Load Gas Load MJ/hour kW Capacity Selection Systems HEX250 Vented Tanks HD250 Gas Hot Water Units DD1HEX250F200EN DD1HEX250F200IN DD1HEX250F200E
GENERAL INSTALLATION INSTRUCTIONS These instructions apply to the Rinnai DDHEX250 High Efficiency Heat Exchange Hot Water System. Rinnai DDHEX250 High Efficiency Heat Exchange hot water system must only be installed, commissioned, serviced and removed by an authorised person in accordance with these instructions, AS/NZS 5601, AS 3000 & AS/NZS 3500.4 and local regulations. Rinnai DDHEX250 High Efficiency Heat Exchange hot water systems are not suitable or approved as a pool heater.
HOT B GENERAL INSTALLATION INSTRUCTIONS For detailed assembly please refer to figure 6 GAS Top of HD200(s) must be below the top of the DDHEX250 Tank and primary heating circuit pipe-work MUST BE below 1500mm from the base of the DDHEX250 tank. = Valves not suppled C COLD SUPPLY RETURN B A 700 mm Minimum Ceiling Clearance Figure 2 - DDHEX250 System Principle of Operation Temperature Control: A temperature sensor is fitted to the thermowell located in the “Tee” piece of the potable Hot Outlet.
GENERAL INSTALLATION INSTRUCTIONS In order to meet the requirements of AS 3498 in respect of Legionella control it is required that the set point be set at 60°C or above. The DDHEX250HWTSTAT will be factory set to 60°C. • Hot water temperature at outlet of sanitary fixtures must comply with the relevant states and territories minimum 50°C requirements. Local regulations and/or the requirements of AS/NZS 3500.
GENERAL INSTALLATION INSTRUCTIONS Location • Ensure reasonable access for installation, servicing and removal. All valves, controls and pumps etc must be easily accessible. Allow a minimum of 700 mm clearance above the DDHEX250 tank for inspection and maintenance. • Rinnai DDHEX250 tanks and any free standing frames must be mounted on a solid level base, capable of supporting the weight of the appliance when full of water. Ensure components are not allowed to stand in water.
GENERAL INSTALLATION INSTRUCTIONS Where the system is delivered as individual components prepare the components as follows: DDHEX250 VENTED TANK: Tank with internal coil heat exchange assembly • Remove outer cardboard box. Inspect for any transport damage. DO NOT install if any components are damaged. MANIFOLDED HD200 INFINITY WATER HEATERS • Remove outer cardboard box. Inspect for any transport damage. DO NOT install if any components are damaged.
GENERAL INSTALLATION INSTRUCTIONS B A C D Figure 5 - Fitting DD250HEXHWTSTAT to Tank Rinnai Australia A - DD250HEX250HWTSTAT B - DDHEX250 Vented Tank C - Tek Screws D - Power Feed to Primary Pump 13 Owners Guide & Installation Instructions
Pipe by installer Rinnai Australia 21201039 14 19801023 17201046 11006716 32201719 32201722 19801023 21401001 21201015 17201046 21401001 21201039 21201015 32201717 DDMSP504 11006719 17201042 21201015 32201719 17201046 Heating Circuit Hot Water Inlet (MP Hot Outlet) 32201719 19801023 21201023 21201039 20801027 19801023 Potable Water Cold Inlet Heating Circuit Return Outlet 32201719 Heating Circuit Hot Water Inlet (MP Cold Inlet) Test Point Hot Outlet Potable Water 19001021
GENERAL INSTALLATION INSTRUCTIONS • Identify where manifolded HD200’s are to be mounted to suit primary circuit requirements. HD(s) supplied with DDHEX250 tanks are preset to 85°C. If the HD(s) has been supplied separate to the DDHEX250 tank ensure the set point temperature is 85°C if not, change as per supplied dip switch settings. This can occur at commissioning stage. • A useful nominal height for the top of the HD200 is 1500 mm from floor level.
GENERAL INSTALLATION INSTRUCTIONS Seal the probe in place with silicon as shown Ensure that the probe is in contact with the end of the drywell ! Figure 7 - Apply Silicon around Drywell WARNING • • The thermostat probe must be fixed securely in place to avoid it from becoming dislodged. Connect primary (heating) circuit pump to GPO mounted on DDHEXHWTSTAT assembly. DO NOT TURN ON.
GENERAL INSTALLATION INSTRUCTIONS Assembly (for skid mounted units): C I G D B B H F E A Figure 8 - DDHEX250 Complete Skid System Model A B C 1 HD 2, 3 HD’s 1750 1750 1200 1200 1200 2525 Rinnai Australia Dimensions D E 600 600 17 1330 1370 F G H I 1010 1010 415 415 625 800 Owners Guide & Installation Instructions
GENERAL INSTALLATION INSTRUCTIONS General Requirements (All Systems): Return Pump: • A secondary or building return pump must be installed in conjunction with the Rinnai HEX250 High Efficiency Heat Exchange system. Pumps should be sized for minimal temperature loss around the ring-main. Pumps must have a isolation valve on the discharge. • Return line from building loop is connected to a tee on the cold water supply pipe down stream of the cold water non return valve.
GENERAL INSTALLATION INSTRUCTIONS Filling Instructions: It may be necessary to un-tie the float valve prior to filling. When the primary water circuit is ready to be charged, open the cold water line which will supply potable cold water to the coils and to the make-up float valve fitting. Open the primary water circuit to the HD200 units for both flow and return. Water will begin to fill the tank via the float valve until the factory adjusted level is achieved (approximately 40 mm below the vent fitting).
GENERAL INSTALLATION INSTRUCTIONS 7. As the system is filled from cold a small quantity of water may drain from the overflow as the system comes up to operating temperature. 8. Once the primary circuit is commissioned open flow to the building hot water supply, and open the isolating valve on the return circuit. 9. Open an outlet load and observe system for 30 minutes to ensure system is functioning satisfactorily. 10.Check gas supply pressure whist operating. 11. Clear strainers on HD200 cold inlets.
GENERAL INSTALLATION INSTRUCTIONS • In jobs that operate for long hours and/or in dusty or smoky environments the combustion air fan may become dirty. This may be indicated by fault 10. Contact Rinnai Service. • Internal heaters may operate for a short period of time and then stop. This can be caused by the flueing not being pushed together properly and exhaust gases are re-entering the inlet air. Push the flue together to remedy this.
GENERAL INSTALLATION INSTRUCTIONS Your Rinnai HD200 Series Continuous Flow Water Heaters have a self diagnostic capability. If a fault occurs, an Error Code will flash on the Digital Monitor. INFINITY HD Fault Codes: ERROR - 03 FAULT REMEDY Inlet water filter needs to be cleaned. Service Noticeable reduction in water flow. call. Power interruption during Bath fill (Water will not flow on power Turn off all hot water taps. Press ON/OFF twice. reinstatement). 10 Air intake or flue blocked.
TROUBLE SHOOTING Fault Finding During Normal Operation: FAULT Delivery Temperature not hot enough No or insufficient water flow from coil heat exchanger POSSIBLE CAUSES REMEDY No electrical or gas supplies to the heat source Check and turn ON the power and gas supplies. Insufficient gas Check gas supply, availability & pressure. DDHEX250HWTSTAT not providing power to heating circuit circulating pump Check DDHEX250HWTSTAT.
TROUBLE SHOOTING FAULT POSSIBLE CAUSES REMEDY Delivery temperature too hot Tempering valve or thermostatic mixing valve malfunctioning - not a Rinnai DDHEX250 operating fault Arrange for a service person to check and rectify. This work must be performed by persons permitted by law to do so. Water flowing to drain from tank Float valve failed OPEN Check operating of float valve and replace if damaged.
CONTACT INFORMATION Internet: www.rinnai.com.au E-mail: enquiry@rinnai.com.au ABN 74 005 138 769 Head Office National Help Lines 10-11 Walker Street, Braeside, Victoria 3195 P.O. Box 460 Tel: (03) 9271 6625 Fax: (03) 9271 6622 Spare Parts & Technical Info Tel: 1300 555 545* Fax: 1300 300 141* *Cost of a local call Higher from mobile or public phones. Rinnai has a Service and Spare Parts network with personnel who are fully trained and equipped to give the best service on your Rinnai appliance.
