Rheem 874T16NF - Manuals

ABOUT YOUR WATER HEATER 5 HOW HOT SHOULD THE WATER BE? The water heater may be installed with one or more user adjustable temperature controllers, which allow you to choose the most suitable temperature for your hot water needs (refer to “Temperature Control” on page 11). If a controller is not inst...

ABOUT YOUR WATER HEATER 6 HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver water at temperatures which can cause scalding. Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the application and ...

ABOUT YOUR WATER HEATER 7 PRECAUTIONS The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer to “General Maintenance” on page 7, “Minor Maintenance Every Six Months” on page 7 and “Major Service Every Five Years ” on page 7. If this water heater...

ABOUT YOUR WATER HEATER 8 CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Rheem 874 series continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Refer to “Circulated Hot Water Flow and Return System” on page 51 for further information and...

ABOUT YOUR WATER HEATER 9 FROST PROTECTION The water heater has a frost protection system. The frost protection system will protect the water heater from damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions occurring. Notes:  The frost protecti...

ABOUT YOUR WATER HEATER 10 HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY? Installation requirements are shown on pages 45 to 58. The water heater must be installed:  by a qualified person, and  in accordance with the installation instructions, and  in compliance with Standards AS/NZS 3...

11 TEMPERATURE CONTROL CONTROLLERS The Rheem 874 and 876 series can be installed with Rheem controllers to enable the user to control the temperature of the delivered water from the outlet of the water heater. There are two families of Rheem controllers suitable for installation with this water heat...

12 TEMPERATURE CONTROL – STANDARD STANDARD CONTROLLER FUNCTIONS If one or more controllers are installed, at least one must be on for the water heater to operate. If all controllers are off, the water heater will only deliver cold water. on / off ( ) button – This button must be pressed once to turn...

TEMPERATURE CONTROL – STANDARD 13 STANDARD CONTROLLER Note: water volume ( ) button, water volume operating light and water volume symbol are on the Kitchen controller only. SILENCING A CONTROLLER – STANDARD The controller emits a sound whenever a button is pressed. This sound can be turned off to p...

TEMPERATURE CONTROL – STANDARD 14 TEMPERATURE SETTINGS – STANDARD CONTROLLER The temperature settings of each type of controller are:  Bathroom 1 & 2 37°C to 46°C (in 1°C increments), 48°C, 50°C  Kitchen 37°C to 46°C (in 1°C increments), 48°C, 50°C*, 55°C**, 60°C * limited to 50°C on an 876 se...

TEMPERATURE CONTROL – STANDARD 15 TEMPERATURE ADJUSTMENT – STANDARD CONTROLLER  A controller must be on and have priority to be able to adjust the temperature setting.  The temperature adjustment is made by pressing the up (  ) button or down (  ) button.  The maximum temperature setting for th...

TEMPERATURE CONTROL – STANDARD 16 KITCHEN CONTROLLER – STANDARD The Kitchen controller allows the user to select the temperature setting for the hot water to be used in the kitchen and laundry. It has a minimum temperature setting of 37°C and a maximum temperature setting of:  874 series 60°C – AU ...

TEMPERATURE CONTROL – STANDARD 17 To operate the Kitchen controller: 1. Turn off the Bathroom controller(s)  If a temperature setting is displayed and the priority light is not glowing, it is necessary to turn off the Bathroom controller(s) to gain priority.  Refer to the notes on the Kitchen cont...

TEMPERATURE CONTROL – STANDARD 18 BATHROOM CONTROLLERS – STANDARD The Bathroom controller(s) allows the user to select the temperature setting for the hot water to be used in the bathroom. They have a minimum temperature setting of 37°C and a maximum temperature setting of:  874 series 50°C  876 s...

TEMPERATURE CONTROL – STANDARD 19 To operate a Bathroom controller: 1. Turn off the Kitchen controller  If a temperature setting is displayed and the priority light is not glowing, it is advised to turn off the Kitchen controller. Refer to the notes on the Bathroom controllers on page 18. 2. Turn o...

TEMPERATURE CONTROL – STANDARD 20 WATER VOLUME FUNCTION The water volume function is designed to warn by an alarm (beeping sound), that a certain volume of water has been delivered from the water heater. It does not stop either the flow of or the heating of water. This function is useful if a bath i...

TEMPERATURE CONTROL – STANDARD 21 5. Turn off the alarm  Press the water volume ( ) button to turn off the alarm. The water volume operating light goes out and 0 x 10L is displayed momentarily on the controller. The temperature setting of the controller with priority is then displayed. 6. Close the...

22 TEMPERATURE CONTROL – DELUXE DELUXE CONTROLLER FUNCTIONS If one or more Deluxe controllers are installed, at least one must be on or the Bath Fill function activated for the water heater to operate. If all Deluxe controllers and the Bath Fill function are off, the water heater will only deliver c...

TEMPERATURE CONTROL – DELUXE 23 bath fill water volume display panel – The selected bath fill water volume is displayed in litres on all Deluxe controllers. The selected bath fill water volume is displayed whenever the Bath Fill function is on (refer to “Bath-Fill Function” on page 32) or when the b...

TEMPERATURE CONTROL – DELUXE 24 VOICE PROMPT AND OPERATING TONE The Deluxe controllers have a series of voice prompts and operating tones which sound during certain operations. The voice prompts and operating tones sound from all Deluxe controllers, regardless of which Deluxe controller is being ope...

TEMPERATURE CONTROL – DELUXE 25 Adjusting the Volume of the Voice Prompt and Operating Tone The volume of the voice prompt and the operating tone can be adjusted to a level comfortable for you. The volume of the voice prompt and the operating tone can be adjusted independently of each other. The vol...

TEMPERATURE CONTROL – DELUXE 26 TEMPERATURE SETTINGS – DELUXE CONTROLLERS The temperature settings of each type of Deluxe controller are:  Bathroom 1 & 2 Deluxe 37°C to 46°C (in 1°C increments), 48°C*, 50°C  Kitchen Deluxe 37°C to 46°C (in 1°C increments), 48°C*, 50°C**, 55°C,*** 60°C * limite...

TEMPERATURE CONTROL – DELUXE 28 KITCHEN CONTROLLER – DELUXE The Kitchen Deluxe controller allows the user to select the temperature setting for the hot water to be used in the kitchen and laundry. It has a minimum temperature setting of 37°C and a maximum temperature setting of:  874 series 60°C – ...

TEMPERATURE CONTROL – DELUXE 29 To operate the Kitchen Deluxe controller: 1. Turn off the Bathroom Deluxe controller(s)  If a temperature setting is displayed and the PRIORITY light is not glowing, it is necessary to turn off the Bathroom Deluxe controller(s) to gain priority.  Refer to the notes ...

TEMPERATURE CONTROL – DELUXE 30 BATHROOM CONTROLLERS – DELUXE The Bathroom Deluxe controller(s) allows the user to select the temperature setting for the hot water to be used in the bathroom. They have a minimum temperature setting of 37°C and a maximum temperature setting of:  874 series 50°C  87...

TEMPERATURE CONTROL – DELUXE 31 To operate a Bathroom Deluxe controller: 1. Turn off the Kitchen Deluxe controller  If a temperature setting is displayed and the PRIORITY and on / off operating lights are not glowing, it is advised to turn off the Kitchen Deluxe controller. Refer to the notes on th...

TEMPERATURE CONTROL – DELUXE 32 BATH FILL FUNCTION The Bath Fill function is designed to allow the water heater to deliver a selected volume of water at a selected temperature. The Bath Fill function commences when the bath fill ( ) button is on and a hot tap is opened. When the set volume has been ...

TEMPERATURE CONTROL – DELUXE 33 5. Close the front panel on the Deluxe controller. 6. Turn on the Bath Fill function  Press the bath fill ( ) button. On all Deluxe controllers:  The bath fill operating light will glow.  The bath fill temperature setting will appear on the temperature display pane...

TEMPERATURE CONTROL – DELUXE 34 Bath Fill Function – Explanatory Notes To operate the Bath Fill function: 1. Turn off all Deluxe controllers  It is advised to turn off all Deluxe controller(s) before activating the Bath Fill function. Refer to the notes on the Bathroom Deluxe controllers on page 30...

TEMPERATURE CONTROL – DELUXE 35 4. Set the bath fill water volume  Press the BATH FILL VOLUME up (  ) button or the BATH FILL VOLUME down (  ) button. The first press of either the BATH FILL VOLUME up (  ) button or the BATH FILL VOLUME down (  ) button will display the last selected bath fill ...

TEMPERATURE CONTROL – DELUXE 36 7. Open the hot tap. The operating light will glow on all Deluxe controllers. Measurement of the water flow at the water heater will commence when the hot tap is opened. Notes:  If a second hot tap is opened when the Bath Fill function is turned on, the set bath fill...

TEMPERATURE CONTROL – DELUXE 37 Turning Off Bath Fill Function During Its Operation The bath fill operation can be interrupted by pressing the bath fill ( ) button before completion of the bath fill operation. If it is necessary to turn off the Bath Fill function before the operation is complete, du...

TEMPERATURE CONTROL – DELUXE 38 Notes on the Bath Fill function:  The Bath Fill function can be set, turned on and turned off at any of the Deluxe controllers.  The Deluxe controllers do not require to have priority (PRIORITY light glowing) or be on in order to set the bath fill water volume or ba...

TEMPERATURE CONTROL – DELUXE 39 Opening a Second Hot Water Tap During Bath Fill Operation  The bath fill water volume is measured as the water flows through the water heater. If more than one hot tap is open, the Bath Fill function will measure the total water volume drawn from all taps and the exp...

TEMPERATURE CONTROL – DELUXE 40 Operation of the Bath Fill function whilst a Deluxe Controller has priority It is recommended the Bath Fill function be set and operated with the Deluxe controllers turned off (refer to Step 1 on page 34). However, if a Deluxe controller has PRIORITY during the settin...

41 WATER SUPPLIES This water heater must be installed in accordance with this advice to be covered by the Rheem warranty. This water heater is manufactured to suit the water conditions of most public reticulated water suppl ies. However, there are some known water chemistries which can have detrimen...

42 SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or fault, which is not related to manufacture or failure of a part (refer to “Terms of the Rheem Warranty” on page 87). NO DISPLAY ON THE CONTROLLER  Is the controller turne...

SAVE A SERVICE CALL 43 WATER FLOW FLUCTUATES More than one or two hot taps (12, 16 and 20 models) or more than two or three hot taps (24 and 26 models) in use at the same time may cause a decrease in the hot water flow from the taps. This can also be evident if the water heater has been installed as...

SAVE A SERVICE CALL 44 CLOUDS OF WHITE ‘VAPOUR’ FROM THE FLUE TERMINAL During the heating cycle, it is not unusual to see water vapour clouds steaming from the flue terminal, particularly on cold days. This is normal operation of the water heater. PRESSURE RELIEF VALVE DISCHARGING A pressure relief ...

45 INSTALLATION – WATER HEATER THIS WATER HEATER IS FOR OUTDOOR INSTALLATION ONLY. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING. Check the water heater is suitable for the gas type available. (refer to the rating label on the water heater) INSTALLATION STANDARDS The water heater must be instal...

INSTALLATION – WATER HEATER 47 INSTALLATION WITHIN A COVERED AREA The water heater must be located such that the installation meets the requirements of either AS 5601 or AS/NZS 5601.1 as applicable under local regulations. There must be sufficient ventilation so the water heater has an adequate supp...

INSTALLATION – WATER HEATER 48 RECESS INSTALLATION The water heater can be installed recessed into a wall. A recess box ( Rheem AU – Part 299247, NZ – Parts 318994 [recess box enclosure kit] and 318995 [recess box door kit]) is available for such an installation. Refer to the installation instructio...

INSTALLATION – WATER HEATER 49 HOT WATER DELIVERY This water heater can deliver water at temperatures which can cause scalding. It is necessary and we recommend that a temperature limiting device be fitted between an 874 series water heater and the hot water outlets in any ablution and public areas ...

INSTALLATION – WATER HEATER 50 Where a temperature limiting device is installed adjacent to the in-series gas booster, the cold water line to the temperature limiting device can be branched off the cold water line either before or after the isolation valve and pressure limiting valve to the solar st...

INSTALLATION – WATER HEATER 51 CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Rheem 874 series continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Notes:  the preset outlet temperature setting of the water heater must be set to at lea...

INSTALLATION – WATER HEATER 52 Circulated Hot Water Flow and Return Continuous Flow Gas Water Heater Circulated Hot Water Flow and Return In-series Gas Booster as part of a Solar Water Heater Installation REDUCING HEAT LOSSES The hot water line from the water heater and the pipe work between the sol...

INSTALLATION – WATER HEATER 53 WATER TEMPERATURE DIAGRAMS Note: NZ - Kitchen Controller max setting is 55°C 874 Series - Kitchen and Bathroom Controllers 876 Series – Kitchen and Bathroom Controllers Note: NZ - Kitchen Controller max setting is 55°C 874 Series - Kitchen Controller Only 876 Series - ...

INSTALLATION – WATER HEATER 54 TECHNICAL DATA Model 874812 876812 874816, 874T16 876T16 874820 876820 874824 874826, 874T26 876826, 876T26 Rated delivery - (@ 40°C rise) litres / min 7.5 10 12.5 15 16.2 Recovery - (@ 25°C rise) litres / min 12 16 20 24 26 Mass Empty (unpackaged) kg 16 16 16 16 16 Ga...

INSTALLATION – WATER HEATER 55 DIMENSIONS – WATER HEATER

INSTALLATION – WATER HEATER 58 TYPICAL INSTALLATION – OUTDOOR LOCATION

59 CONNECTIONS – PLUMBING All plumbing work must be carried out by a qualified person and in compliance with the Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand the installation must conform to Clauses G11, G12 and H1 of the New Zealand Building Code....

CONNECTIONS – PLUMBING 60 IN-SERIES BOOSTER The pipe work between the solar storage tank (if one is installed) and the in-series gas booster has a minimum recommended pipe size of DN20, MUST BE of copper and be fully insulated with a closed cell type insulation or equivalent in accordance with the r...

61 CONNECTIONS – ELECTRICAL All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the Wiring Rules AS/NZS 3000 and all local codes and regulatory authority requirements. Warning: Temperature controllers must not be fitted to this water heater (874 ...

CONNECTIONS – ELECTRICAL 62 WIRING DIAGRAM Wiring Diagram – 874, 876 Series 812, 816, T16, 820, 824, 826, T26 Models

63 EZ LINK SYSTEM DUAL INSTALLATION The EZ Link™ system is designed to electronically control two continuous flow gas water heaters and have them operate as one. One or both water heaters may be in operation, depending upon the hot water demand. The second water heater will only operate when the hot...

EZ LINK SYSTEM DUAL INSTALLATION 64 DUAL INSTALLATION The two water heaters can be installed side by side with minimal clearance between them. Rheem 874 and 876 series 812, 816, T16, 820, 824, 826 and T26 models are certified for installation with an exemption from the 300 mm minimum clearance requi...

EZ LINK SYSTEM DUAL INSTALLATION 65 EZ LINK CABLE CONNECTION The references in steps 8 to 11 are to the ‘Control Board with EZ Link Connection’ diagram on page 66. To connect the EZ Link cable to the water heaters: 1. Close any hot taps and ensure the burners on both water heaters are not operating....

EZ LINK SYSTEM DUAL INSTALLATION 66 17. Turn on the controller by pressing the on / off ( ) button, if one is installed. The on / off operating light and the priority light will both glow. 18. Check to ensure the flow from each connected hot tap is sufficient to operate a water heater.  Open each h...

EZ LINK SYSTEM DUAL INSTALLATION 67 Typical Two Unit Manifold with EZ Link Connection 874 and 876 series 812, 816, T16, 820, 824, 826 and T26 models

68 INSTALLATION – CONTROLLERS CONTROLLERS The Rheem 874 and 876 series can be installed with Rheem controllers to enable the user to control the temperature of the delivered water from the outlet of the water heater. There are two families of Rheem controllers suitable for installation with this wat...

INSTALLATION – CONTROLLERS 69 Location – The controllers must be installed in dry, shaded and clean locations. Do not install the controllers:  Near a heat source, such as a cook top, stove or oven. Heat, steam and smoke will interfere with the electronic components of the controllers.  In direct ...

INSTALLATION – CONTROLLERS 70 Wiring installation: 1. Penetrate the wall with a 30-35 mm hole at the controller location. 2. Install the Kitchen controller cable between the location of the controller and the water heater. 3. Remove the base plate from the controller. 4. Draw the cable through the c...

INSTALLATION – CONTROLLERS 71 If it is necessary to have an exposed wiring installation, follow this procedure omitting Steps 1 and 4, and make an opening in the thin section in the underside of the controller to accommodate the cable (as shown in the diagram), prior to Step 6. Kitchen Controller (S...

INSTALLATION – CONTROLLERS 72 BATHROOM 1 AND BATHROOM 2 CONTROLLERS If only one Bathroom controller is to be installed, the standard Bathroom 1 Controller (Rheem AU - Part 299854, NZ - Part A299851) or the Bathroom 1 Deluxe controller (Rheem AU - Part 299862, NZ - Part A299862) must be used. If two ...

INSTALLATION – CONTROLLERS 74 CONNECTING THE CONTROLLER(S) TO THE WATER HEATER To connect the controller(s) to the water heater: 1. Ensure the electrical supply to the water heater is switched off. 2. Unscrew and gently flip down the electrical cover on the underside of the water heater. 3. Draw the...

75 COMMISSIONING All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may become necessary because of local conditions. TO TURN ON THE WATER HEATER  Open all of the hot taps in the house (don’t forget the shower).  Open the cold water isolation va...

COMMISSIONING 76 Gas Inlet Test Point Pressure To check the gas inlet pressure: 1. Close any hot taps and ensure the burners are not operating. 2. Close the gas isolation valve at the gas inlet to the water heater. 3. Locate the gas inlet test point on the gas connection to the water heater.  Remov...

COMMISSIONING 77 BURNER GAS PRESSURE It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must be switched on, the burners ignited and hot water...

COMMISSIONING 78 Notes:  If the burners extinguish and an error code 11 or 12 starts to flash on the LED display:  release the MIN and adjuster buttons  close the hot tap  clear the error code (refer to “Clearing Error Code” on page 78)  recommence the procedure from Step 9.  If the adjuster b...

COMMISSIONING 79 PRESET OUTLET TEMPERATURE SETTING The factory preset outlet temperature setting of the water heater is:  874 series 60°C – AU, 55°C – NZ  876 series 50°C If a temperature controller is connected to the water heater, this will override the preset outlet temperature setting and the ...

COMMISSIONING 81 OUTLET TEMPERATURE COMPENSATION ADJUSTMENT The outlet temperature compensation adjustment function is only applicable to:  AU – Australian 876 series 812, T16, 820, 824, 826 and T26 model water heaters The maximum outlet temperature may be adjusted to compensate for temperature los...

COMMISSIONING 82 Disconnecting a Temperature Controller(s) To disconnect the temperature controller(s): 1. Switch off the electrical supply at the power outlet to the water heater. 2. Unscrew and gently flip down the electrical cover on the underside of the water heater. 3. Loosen the terminal screw...

COMMISSIONING 84 17. NZ – 874 series:  if the water temperature is still above 55°C and requires to be decreased, repeat steps 11, 13 and 14, followed by steps 2 to 5 until an acceptable water temperature not exceeding 55°C is measured at the same hot tap.  if the water temperature is below 55°C t...

85 DRAINING THE WATER HEATER To drain the water heater:  Turn off the water heater (refer to “Turn Off The Water Heater” on page 84).  Open a hot tap (preferably the shower outlet).  Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet, on the underside of the water ...

87 RHEEM CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY 874, 876 SERIES 812, 816, T16, 820, 824, 826, T26 MODELS 1. THE RHEEM WARRANTY – GENERAL 1.1 This warranty is given in Australia by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New South...

RHEEM CONTINUOUS FLOW GAS WATER HEATER WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY Revision Date: 2018 February (41-16889-00) 122920A 88 874, 876 SERIES 812, 816, T16, 820, 824, 826, T26 MODELS 3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT 3.1 Rheem will repa...