Rheem 874 Owner's Manual And Installation Instructions
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Rheem 874 Owner's Manual And Installation Instructions

Gas continuous flow water heater
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Owner's
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Installation Instructions

Gas Continuous Flow Water Heater
27L Gas Water Heater
— 874 & 872 Series, 627 Models
This water heater must be installed and serviced by an authorised person.
Please leave this guide with the householder.
I N S T A L L A R H E E M
T M
w w w .r h e em . c o. nz

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Summary of Contents for Rheem 874

  • Page 1: Installation Instructions

    Installation Instructions Gas Continuous Flow Water Heater 27L Gas Water Heater — 874 & 872 Series, 627 Models This water heater must be installed and serviced by an authorised person. Please leave this guide with the householder. I N S T A L L A R H E E M...
  • Page 2 Rheem Australia Pty Ltd or Paloma Co., Ltd. Rheem New Zealand Pty Ltd is the supplier of the Rheem range of electronic continuous flow gas water heaters, manufactured by Paloma Co., Ltd, a world leader in water heater technology and manufacture.

  • Page 3: Table Of Contents

    CONTENTS HOUSEHOLDER - We recommend you read pages 4 to 41. The other pages are intended for the installer but may be of interest. Contents ............................3 About Your Water Heater ......................4 Temperature Control ........................9 Temperature Control – Standard ..................... 10 Temperature Control –...

  • Page 4: About Your Water Heater

    55 C Notes: The 874 series water heater may be installed as an in-series gas booster water heater to a solar preheat water heater. For information relating to the function and operation of the solar water heater, refer to the Owner‟s Guide and Installation Instructions supplied with the solar water heater.
  • Page 5 A tempering valve must be installed as per AS/NZS3500.4 requires you to do so. Warning: Temperature controllers must not be fitted to this water heater (874 series) as part of a solar water heater system. This is because the water can be supplied at a temperature much higher than the controller temperature setting.
  • Page 6 The power supply cord and plug must be replaced with a genuine replacement part available from Rheem. Phone your nearest Rheem Service Centre to arrange for an inspection. The warranty can become void if relief valves or other safety devices are tampered with or if the installation is not in accordance with these instructions.
  • Page 7 5601 and all local codes and regulatory authority requirements. Warning: Temperature controllers must not be fitted to this water heater (874 series) as part of a solar water heater system because water at a temperature much higher than the controller setting can be delivered.
  • Page 8 SERVICING For safe and efficient operation, the water heater should be serviced annually by your nearest Rheem Service Centre. Only genuine replacement parts should be used on this water heater. Warning: Servicing of a gas water heater should only be carried out by authorised personnel.

  • Page 9: Temperature Control

    NOTE: CONTROLLERS MUST NOT FITTED IF WATER TEMPERATURES ABOVE 55ºC ARE REQUIRED CONTROLLERS The Rheem 874 and 872 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 heater.

  • Page 10: Temperature Control - Standard

    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 on the controller.
  • Page 11 TEMPERATURE CONTROL – STANDARD STANDARD CONTROLLER priority light in te g rity in use light up display panel button water volume symbol  down button water volume operating light on / off operating light water volume button on / off controller type button K = Kitchen...
  • Page 12 5. If a building is fitted with a temperature limiting device such as a tempering valve and an 874 or 872 series water heater is installed without a separate untempered hot water line to the kitchen, laundry or other non- ablution area.
  • Page 13 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 the controllers are: Kitchen Bathroom 874 series 55°C 50°C 872 series 55°C 50°C...
  • Page 14 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 55ºC 872 series 55ºC...
  • Page 15 The Kitchen controller temperature setting will be displayed. This is the lower of the previous setting and: c h e c k  874 series 50ºC h o t w a t e r water t e m p e r a t u r e vol ume 50˚C...
  • Page 16 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 50ºC 50˚C 872 series The Bathroom controllers operate in tandem.
  • Page 17 TEMPERATURE CONTROL – STANDARD To operate a Bathroom controller: 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 16.
  • Page 18 TEMPERATURE CONTROL – STANDARD WATER VOLUME FUNCTION – STANDARD CONTROLLER The water volume function is designed to warn, by a 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 particularly useful if a bath is being filled, or measuring the water consumed by the use of a shower.
  • Page 19 TEMPERATURE CONTROL – STANDARD Turn off the alarm i n us e pri ori ty Press the water volume button to turn off the alarm.  The water volume operating light goes out and 0 x10l is displayed momentarily on the controller. The temperature setting of the controller with priority is then displayed.

  • Page 20: Temperature Control - Deluxe

    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 cold water.
  • Page 21 BATH FILL BATH FILL VOLUME TEMPERATURE up button up button BATH FILL BATH FILL VOLUME TEMPERATURE BATH FILL BATH FILL Rheem VOLUME TEMPERATURE  down button  down button Bath Fill Bath Fill BATH FILL BATH FILL Bath Bath completed...
  • Page 22 TEMPERATURE CONTROL – DELUXE 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 operated at the time.
  • Page 23 Note: If the ON / OFF button is not pressed within four (4) seconds of the up () button being pressed, Rheem “CL” will start flashing on the temperature display panel. If this occurs, release the up () button and recommence the procedure.
  • Page 24 To enable the delivery of water temperatures above 55°C to the kitchen, laundry or other non-ablution area, no controllers can be connected to either the 874 or 872 series. A separate untempered pipe work must be installed from the water heater to the hot water outlets in these locations and the water heater temperature...
  • Page 25 The temperature adjustment is made by pressing the up () button or down () button. The minimum temperature setting for each type of controller is 37 C. The maximum temperature setting for the controllers are: Kitchen Bathroom 874 series 55 C 50 C 872 series 55 C 50 C Each press of the up () button will increase the temperature setting by one increment.
  • Page 26 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 874 series 55ºC 872 series 55ºC...
  • Page 27 Kitchen Deluxe controller  page 26. BATH FILL ON/OFF Turn on the Kitchen Deluxe controller Rheem Press the ON / OFF button.  ACTIVE The light in the ON / OFF button and the ACTIVE °C 8 8 8 8 light will both glow.
  • Page 28  If a hot tap is open in another bathroom, the water will be delivered at up to 55°C for an 874 series model if a temperature limiting device is installed in the hot pipe to the bathroom, or up to 55 C if a temperature limiting device is not installed.
  • Page 29 Bathroom Deluxe BATH FILL ON/OFF controllers on page 28. Turn on the Bathroom Deluxe controller Rheem Press the ON / OFF button.  The light in the ON / OFF button and the ACTIVE ACTIVE light will both glow. °C...
  • Page 30 Refer to the notes on the Bathroom Deluxe controllers on page 28. BATH FILL ON/OFF Pull down the front panel on the Deluxe controller. Rheem BATH FILL BATH FILL The BATH FILL VOLUME and BATH FILL TEMPERATURE VOLUME TEMPERATURE up () and down () buttons will be exposed.
  • Page 31 1 2 0 BATH (l) TEMPERATURE CONTROL – DELUXE BATH FILL ON/OFF Close the front panel on the Deluxe controller. Rheem Turn on the Bath Fill mode Press the BATH FILL button.  On all Deluxe controllers: ACTIVE °C 1 2 0 ...
  • Page 32 Bath Fill mode. BATH FILL BATH FILL VOLUME TEMPERATURE Rheem Pull down the front panel on the Deluxe controller. BATH FILL VOLUME BATH FILL TEMPERATURE up () and down () buttons will be...
  • Page 33 BATH FILL BATH FILL While the bath fill water volume is displayed, each volume has been VOLUME TEMPERATURE Rheem increased, subsequent press of the BATH FILL VOLUME bath may overflow” (up button) BATH FILL VOLUME (down button) will change the water volume “bath fill water...
  • Page 34 TEMPERATURE CONTROL – DELUXE Open the hot tap. The operating light will glow on all Deluxe controllers. ACTIVE Measurement of the water flow at the water heater will °C 1 2 0 commence when the hot tap is opened. BATH (l) Notes: BATH FILL ON/OFF...
  • Page 35 TEMPERATURE CONTROL – DELUXE Turning Off Bath Fill Mode 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 mode before the operation is complete, during Step Press the BATH FILL button At this first press of the BATH FILL button...
  • Page 36 TEMPERATURE CONTROL – DELUXE Notes on the Bath Fill mode: The Bath Fill mode can be set and turned on at any of the Deluxe controllers. The Deluxe controllers do not require to have priority (ACTIVE light glowing) or be on in order to set the bath fill water volume or bath fill temperature or to turn the BATH FILL button on.
  • Page 37 TEMPERATURE CONTROL – DELUXE 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 mode will measure the total water volume drawn from all taps and the expected water volume from the first tap will be decreased.
  • Page 38 TEMPERATURE CONTROL – DELUXE Operation of the Bath Fill mode whilst a Deluxe Controller is ACTIVE It is recommended the Bath Fill mode be set and operated with the Deluxe controllers turned off (refer to Step 1 on page 32). However, if a Deluxe controller is ACTIVE during the setting and operation of the Bath Fill mode, then the following additional events occur: During...

  • Page 39: Save A Service Call

    SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or “Warranty” fault, which is not related to manufacture or failure of a part (refer to on page 75). NO DISPLAY ON THE CONTROLLER Is the controller turned on? “Temperature Control”...
  • Page 40 Water heater size Do you have the correct size water heater for your requirements? The sizing guide in the sales literature and on the Rheem website (www.rheem.co.nz) suggests average sizes that may be needed. FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS It is the normal operation of the water heater for the fan to continue running after heating of the water is finished.
  • Page 41 If the error code persists, take note of the numerical code, turn off the hot tap and turn off the controller(s). Phone your nearest Rheem Service Centre to arrange for inspection.

  • Page 42: Installation - Water Heater

    (refer to the rating label on the water heater) The 874 series of water heater may be installed as an in-series gas booster water heater to a solar preheat water heater. For information relating to the function and operation of the solar water heater, refer to the Owner‟s Guide and Installation Instructions supplied with the solar water heater.
  • Page 43 As a guide the following requirements extracted from the New Zealand Gas Installations Standard NZS 5261, must be observed. At least 300 mm between the top of the flue terminal and the eaves. At least 500 mm between the flue terminal and the edge of any opening into the building, measured horizontally along the wall.
  • Page 44 MAINS WATER SUPPLY Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve that does not have non return valve characteristics (such as an RMC PSL series valve) is required and should be fitted as shown in the installation diagram (refer to page 52).
  • Page 45 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 or 872 series water heater and the hot water outlets in any ablution and public areas such as a bathroom, ensuite or public amenities, to reduce the risk of scalding.
  • Page 46 Where a temperature limiting device is installed adjacent to the gas booster water heater, 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 storage tank, but it MUST BE before the non return valve prior to an open circuit direct system.
  • Page 47 CIRCULATED HOT WATER FLOW AND RETURN SYSTEM The Rheem 874 and 872 series continuous flow water heaters 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 least 60°C.
  • Page 48 OUTLET TEMPERATURE TEMPERATURE BATHROOM 2 CONTROLLER (MAX 50˚C SETTING) BATHROOM BATHROOM 874 and 872 Series - No Controllers Notes: Temperature Limiting Devices – refer to “Hot Water Delivery” on page 45. Factory preset outlet temperature setting is: 874 series 55°C ...
  • Page 49 Dimensions And Technical Data Model 874627 872627 Rated delivery litres / min 16.9 16.9 (@ 40 C rise) Recovery litres / min (@ 25 C rise) Weight (Empty) Hourly Gas Gas Details Test Point Gas Pressure (kPa) Min Gas Pressure Max Gas Pressure Consumption (kPa)
  • Page 50 DIMENSIONS – STANDARD CONTROLLERS Kitchen Controller (Standard) Bathroom Controller (Standard)
  • Page 51 DIMENSIONS – DELUXE CONTROLLERS Deluxe Controller – Cover Closed Bath Fill Bath Fill completed Bath Bath (automatic) Water Fill BATH FILL BATH FILL Volume Temp Bath Fill Button Press Bath Press Bath (Red light flashes) Bath Fill Fill Button Set Bath Fill Water Volume Fill Button (Red light on) (Red light on)
  • Page 52 TYPICAL INSTALLATION – OUTDOOR LOCATION...
  • Page 53 POWER SOLAR CORD PREHEAT 874 series gas booster water heaters do not need to WATER GATE VALVE be installed with a solar bypass valve. BALL VALVE The maximum supply temperature to the water...
  • Page 54 PIPE SIZES The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made. To achieve true mains pressure operation, the cold water line to the water heater should be the same size or bigger than the hot water line from the water heater.

  • Page 55: Connections - Electrical

    Wiring Rules AS/NZS 3000 and local authority requirements. Warning: Temperature controllers must not be fitted to this water heater (874 series) as part of a solar water heater system because water at a temperature much higher than the controller setting can be delivered.

  • Page 56: Ez-Link System Dual Installation

    The second water heater will only operate when the hot water demand exceeds the capacity of the first water heater to supply. The EZ-Link system is suitable for installation with Rheem 864 and 862 series continuous flow gas water heaters. The Ez-Link Kit PN 290141 is required for the installation.
  • Page 57 DUAL INSTALLATION Install two continuous flow water heaters of the same model in a parallel plumbing arrangement. It is good ® practice, but not essential, to install the two water heaters in an Equa-Flow manifold plumbing arrangement. There are basic installation requirements which must be followed: The pipe work must be sized to meet the requirements of both AS/NZS 3500.4 and the application.
  • Page 58 EZ-LINK CABLE CONNECTION „Control Board with Ez-Link Connection‟ The references in steps 14 to 17 are to the diagram on page 59. To connect the Ez-Link cable to the water heaters: Close any hot taps and ensure the burners on both water heaters are not operating. Switch off the electrical supply at the power outlet to each water heater.
  • Page 59 DIP SWITCH 4 OF DIP1 SECURE CABLE WITH SET OF DIP SWITCHES IN CABLE CLAMP AND SCREW THE ON (UP) POSITION EZ-LINK CABLE PLUG IN EZY-LINK CABLE INTO CONNECTOR MANIFOLD INSTALLATION - EZ LINK CONNECTION Control Board with Ez-Link Connection EZ-LINK CABLE CONNECTION TWO CONTINUOUS FLOW WATER HEATERS - 862,864,866 SERIES 027 MODELS CONTINUOUS FLOW WATER HEATER...

  • Page 60: Installation - Controllers

    INSTALLATION – CONTROLLERS CONTROLLERS The Rheem 874 & 872 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 heater. These are the standard controllers and the Deluxe controllers.
  • Page 61 Outdoors. The controllers are not weatherproof. KITCHEN CONTROLLER The standard Kitchen controller (Rheem PN A299853) or Kitchen Deluxe controller (Rheem PN A299861) is to be installed in the kitchen or laundry only. It has a minimum temperature setting of 37 C and a maximum...
  • Page 62 Wiring installation: Penetrate the wall with a 30-35 mm hole at the controller location. Install the Kitchen controller cable between the location of the controller and the water heater. Remove the base plate from the controller. Draw the cable through the central hole in the base plate. Fix the base plate to the wall using suitable screws and wall anchors.
  • Page 63 If it is necessary to have an exposed wiring installation, follow this procedure omitting Steps 24 and 27, 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 29. controller suitable wall anchors...
  • Page 64 Bathroom1 controller and the other must be a standard Bathroom2 controller (Rheem PN A299855) or one must be a Bathroom1 Deluxe controller and the other must be a Bathroom2 Deluxe controller (Rheem PN A299863).
  • Page 65 Wiring installation: Penetrate the wall with a 30-35 mm hole at the controller location. Install the supplied cable between the location of the controller and the water heater. Remove the base plate from the controller. Peel off one side of the adhesive paper from the foam packing and adhere to the back face of the base plate.
  • Page 66 Controller Cable Connection Refit the electrical cover to the water heater and replace Rheem Continuous Flow 86, 87 Series 022, 024, 027 Models the screws. Switch on the electrical supply to the water heater. Upon completion of the installation of the controllers, it is necessary to test their operation through the “Temperature Control”...

  • Page 67: Commissioning

    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 valve fully at the inlet to the water heater.
  • Page 68 COMMISSIONING Gas Inlet Test Point Pressure To check the gas inlet pressure: Close any hot taps and ensure the burners are not operating. Close the gas isolation valve at the gas inlet to the water heater. Locate the gas inlet test point on the gas connection to the water heater.
  • Page 69 COMMISSIONING 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 must be flowing from a hot tap. Warning: The removal of the front panel will expose 240 volt wiring.
  • Page 70 COMMISSIONING Notes: If the burners extinguish and error code 11 or 12 starts to flash on the LED display: release the MIN and adjuster buttons  close the hot tap  recommence the procedure from Step 8.  If the adjuster button is released before Step 13, clear any error code (if displayed) and recommence the procedure from Step 8.
  • Page 71 Gas Booster for a Solar Water Heater Where an 874 series water heater is installed as a gas booster to a solar water heater, the preset outlet temperature setting must be set at 75 C for the system to operate correctly.
  • Page 72 WARNING: TEMPERATURE CHANGE MUST ONLY BE MADE BY A QUALIFIED INSTALLER OR RHEEM SERVICE CENTRE REPRESENTITIVE. SEVERE SCALD INJURIES COULD OCCUR IF BATHROOMS AND ENSUITES ARE NOT PROTECTCED BY A HOT WATER TEMPERING DEVICE. TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING The temperature settings will be displayed on the LED display.
  • Page 73 COMMISSIONING TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises are vacant, then: Turn off the controllers(s) (if fitted) by pressing the on / off button. The light in the on / off button will go out and the priority light (standard controller) or the ACTIVE light (Deluxe controller), if it is on, will go out.

  • Page 74: Draining The Water Heater

    DRAINING THE WATER HEATER To drain the water heater: “Turn Off The Water Heater” Turn off the water heater (refer to on page 73). 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 heater.

  • Page 75: Warranty

    Notes: *Rheem New Zealand limited is the supplier of Rheem electronic continuous flow gas water heaters, manufactured by Paloma Co., Ltd, a world leader in water heater technology and manufacture. **Refer to item 4 of warranty conditions.
  • Page 76 WARRANTY EXCLUSIONS 1. REPAIR AND REPLACEMENT WORK WILL BE CARRIED OUT AS SET OUT IN THE RHEEM WATER HEATER WARRANTY, HOWEVER THE FOLLOWING EXCLUSIONS MAY CAUSE THE WATER HEATER WARRANTY TO BECOME VOID AND MAY INCUR A SERVICE CHARGE AND / OR COST OF PARTS.

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872627

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