Rheem W27 Owner'S Manual And Installation Instructions Download | Manualshive

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INSTALLATION – WATER HEATER

21

DIMENSIONS AND TECHNICAL DATA

Model

874W27

Rated delivery

(@ 40°C rise)

litres / min

16.5

Recovery

(@ 25°C rise)

litres / min

27

Mass

Empty

kg

29

Gas Details

Hourly Gas

Consumption

(MJ)

Min Gas Pressure

(kPa)

Test Point Gas Pressure (kPa)

Max Gas Pressure

(kPa)

minimum

maximum

Model

W27

W27

W27

W27

W27

Natural

205

1.13

0.193

0.905

3.50

Propane

205

2.75

0.277

1.430

3.50

Model numbers: N = Natural, P = Propane.
Letter N or P is included in the model number, e.g. 874W27NF, to denote gas type.
F = Frost protection.
Technical data is subject to change.

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Summary of Contents for W27

Page 1: ...r must be installed and serviced by a qualified person Please leave this guide with the householder Owner s Guide and Installation Instructions Rheem 27 Water Star Continuous Flow Gas Water Heater 874 series W27 model ...

Page 2: ...f Rheem Australia Pty Ltd Trademark of Rheem Australia Pty Ltd Note Every care has been taken to ensure accuracy in preparation of this publication No liability can be accepted for any consequences which may arise as a result of its application Warning Upon completion of the installation and commissioning of the water heater leave this guide with the householder or a responsible officer DO NOT lea...

Page 3: ...ended for the Installer but may be of interest About Your Water Heater 4 Regular Care 10 Water Supplies 12 Save A Service Call 14 Installation Water Heater 17 Connections Plumbing 23 Connections Electrical 26 Wiring Diagram 27 Commissioning 28 Draining The Water Heater 34 Warranty 35 ...

Page 4: ...ontrolled copper cylinder When a hot tap is turned on hot water is supplied immediately from this cylinder Water flows through the heat exchanger of the water heater when a hot tap is opened and the gas burners ignite to provide immediate heating of the water Heat produced by the burner is transferred to the water through the heat exchanger The water flow is initially diverted into the copper cyli...

Page 5: ...athroom and ensuite The risk of scalding will be reduced and still allow hotter water to the kitchen and laundry THERMOSTAT The thermostat automatically controls the electricity supply to the heating unit of the cylinder so a constant temperature is maintained The thermostat and its protective over temperature cut out is mounted inside the front cover of the water heater There is no need to switch...

Page 6: ...bustible materials near the water heater Flammable liquids such as petrol newspapers and similar articles must be kept well away from the water heater and the flue terminal Do not use aerosols stain removers and household chemicals near the water heater whilst it is working Gases from some aerosol sprays stain removers and household chemicals become corrosive when drawn into a flame Do not store s...

Page 7: ...r outlet Switch on the electrical supply at the power outlet to the water heater The water heater will operate automatically when you open a hot tap GOING ON HOLIDAYS If you are going on holidays it is not necessary to turn the water heater off If it is necessary to turn off the water heater refer to To Turn Off The Water Heater on page 7 FROST PROTECTION The water heater has a frost protection sy...

Page 8: ... cover panel and close the hot tap Note It is recommended not to screw the drain plugs back in until the water heater is to be turned on again HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY Installation requirements are shown on pages 17 to 22 The water heater must be installed by a qualified person and in accordance with the installation instructions and in compliance with Standards AS ...

Page 9: ...water area or you are not sure of your water chemistry have your water checked against the conditions described on page 12 HOW LONG WILL THE WATER HEATER LAST The water heater is supported by a manufacturer s warranty refer to page 35 There are a number of factors that will affect the length of service the water heater will provide These include but are not limited to the water chemistry the water...

Page 10: ...ly Refer to Temperature Pressure Relief Valve on page 11 Warning Exercise care to avoid any splashing of water as water discharged from the drain line will be hot Stand clear of the drain line s point of discharge when operating the valve s lever Operate the easing lever on the expansion control valve if fitted It is very important you raise and lower the lever gently Refer to Expansion Control Va...

Page 11: ...arrange for an inspection The temperature pressure relief valve should be replaced at intervals not exceeding 5 years or more frequently in areas where there is a high incidence of water deposits refer to Water Supplies on page 12 Accessing the Temperature Pressure Relief Valve The plastic cover panel is required to be removed to access to temperature pressure relief valve To access the valve 1 Pu...

Page 12: ...ontinuous flow water heater In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface Where the saturation index exceeds 0 40 the water is very scaling An expansion control valve must be fitted on the cold water line prior to the water heater to protect and for the Rheem warranty to apply to the temperature pressure relief valve and copper cylinder Whe...

Page 13: ...ensure the water supply meets the requirements given in these guidelines for the Rheem warranty to apply SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY The water heater and its components are not suitable for certain water chemistries Those chemistries are listed below If the water heater is connected at any time to a water supply with the following water chemistry the Rheem warranty will no...

Page 14: ...the cold water supply to the water heater Check for water flow at other taps and that the cold water isolation valve refer to page 23 is fully open WATER FLOW FLUCTUATES More than two or three taps in use at the same time may cause a decrease in the hot water flow from the taps Are there more than two or three taps open or are appliances such as a dishwasher or washing machine in use at the same t...

Page 15: ...heater Check the gas isolation valve at the gas inlet to the water heater is fully open Wait 5 minutes then switch on the electrical supply to the water heater and open a hot tap If the error code persists take note of the numerical code and turn off the hot tap Phone Rheem Service or their nearest Accredited Service Agent to arrange for inspection TEMPERATURE PRESSURE RELIEF VALVE RUNNING Normal ...

Page 16: ... is higher than expected we suggest you check the following points Is one outlet especially the shower using more hot water than you think Carefully review the family s hot water usage Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage Has there been an increase in hot water usage An increase in hot water usage will result in an increase in water heate...

Page 17: ...d for this purpose WATER HEATER LOCATION The water heater should be installed close to the most frequently used outlet and its position chosen with safety and service in mind Make sure people particularly children will not touch the flue terminal The flue terminal and air inlet must be clear of obstructions and shrubbery Clearance must be allowed for servicing of the water heater The water heater ...

Page 18: ...o a building in the direction of the flue discharge At least 500 mm between the flue terminal and a fence wall or other obstruction in the direction of the flue discharge Note If these horizontal distances cannot be achieved AS NZS 5601 1 states an equivalent horizontal distance measured diagonally from the nearest discharge point of the flue terminal to the opening may be deemed to comply Check w...

Page 19: ...ve 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 22 Model W27 Relief valve setting 1000 kPa Expansion control valve setting 850 kPa Max mains supply pressure With expansion control valve 650 kPa Without expansion control valve 800 kPa Min mains supply pressure 160 kPa minimum water supply pressur...

Page 20: ...ture differential between the hot water inlet and the tempered water outlet of no greater than 10 C and a specified maximum permitted pressure variation in the supply between the hot water inlet and the cold water inlet of no less than 15 Refer to the specifications of the temperature limiting device Where a temperature limiting device is installed adjacent to the water heater the cold water line ...

Page 21: ...s Hourly Gas Consumption MJ Min Gas Pressure kPa Test Point Gas Pressure kPa Max Gas Pressure kPa minimum maximum Model W27 W27 W27 W27 W27 Natural 205 1 13 0 193 0 905 3 50 Propane 205 2 75 0 277 1 430 3 50 Model numbers N Natural P Propane Letter N or P is included in the model number e g 874W27NF to denote gas type F Frost protection Technical data is subject to change ...

Page 22: ...INSTALLATION WATER HEATER 22 TYPICAL INSTALLATION OUTDOOR LOCATION ...

Page 23: ...also to Hot Water Delivery on page 20 and to Mains Water Supply on page 19 A disconnection union must always be provided at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of the water heater Note If an expansion control valve is r...

Page 24: ... observe this precaution Refer to rating label for gas types and pressures TEMPERATURE PRESSURE RELIEF VALVE The temperature pressure relief valve is supplied and installed in position at the top of the water heater cylinder inside the jacket The temperature pressure relief valve can be assessed by removing the plastic cover panel refer to Accessing the Temperature Pressure Relief Valve on page 11...

Page 25: ...ocal regulatory authority approval the drain lines from the temperature pressure relief valve and expansion control valve from an individual water heater may be interconnected The outlet of a drain line must be in such a position that flow out of the pipe can be easily seen but arranged so discharge will not cause injury damage or nuisance The termination point of a drain line must comply with the...

Page 26: ...n addition the GPO must be clear of the flue exhaust draining water gas supply pipe and water connections Warning Temperature controllers must not be fitted to this water heater 874 series because water at a temperature much higher than the controller setting can be delivered The power consumption of the water heater is Component Power consumption Comments Gas water heater 80 Watts Burner on anti ...

Page 27: ...27 WIRING DIAGRAM ...

Page 28: ... governor incorporated in the water heater is not adjustable To complete the installation it is necessary to check the gas supply pressure at the inlet to the water heater refer to Gas Inlet Pressure on page 28 the minimum test point pressure and the maximum test point pressure refer to Burner Gas Pressure on page 30 Explain to the householder or a responsible officer the functions and operation o...

Page 29: ...off button 7 Open a hot tap fully and ensure the burners are fully ignited It may be necessary to open a second tap 8 Turn on all other gas burning appliances in the house which are on the same gas supply 9 Observe the gas pressure reading on the manometer If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating label no adjustment is required If the man...

Page 30: ...eater if not already open 8 Open a hot tap slowly until the burners ignite 9 Press and hold down the MIN button and observe the reading on the manometer 1L is shown on the LED display 10 Release the MIN button If the manometer reading observed in step 9 agrees with the rating label no further adjustment is required 11 To adjust press and hold the adjuster button LH is shown on the LED display Note...

Page 31: ... LED display during the commissioning process it will be necessary to clear the error in order to complete the installation To clear an error code switch off the electrical supply at the power outlet to the water heater check the gas isolation valve at the gas inlet to the water heater is fully open wait five 5 minutes switch on the electrical supply at the power outlet to the water heater PRESET ...

Page 32: ...erature setting will show on the LED display If the temperature displayed on the LED display is the desired preset outlet temperature setting then proceed to step 7 as no further adjustment is necessary 6 Press the MAX button to increase or the MIN button to decrease the preset outlet temperature setting Each press of the MAX or MIN button will increase or decrease the preset temperature by one in...

Page 33: ... the water heater Drain the water heater if there is a risk of freezing conditions occurring refer to Draining The Water Heater on page 34 Notes The frost protection system will be rendered inoperable if electrical power is not available at the water heater Damage caused by freezing due to the unavailability of power at the water heater is not covered by the Rheem warranty refer to Terms of the Rh...

Page 34: ... at the cold water inlet and transfer pipe connection on the underside of the water heater A portion of water will drain from the water heater In order to drain the remainder of water inside the water heater raise the lever of the temperature pressure relief valve The easing lever on the valve is accessed by removing this plastic cover panel Refer to Accessing the Temperature Pressure Relief Valve...

Page 35: ... a position that does not allow safe or ready access the cost of that access including the cost of additional materials handling and or safety equipment shall be the owner s responsibility In other words the cost of dismantling or removing cupboards doors or walls and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable position is not covered by...

Page 36: ...within the applicable warranty period 4 2 You are not entitled to make a claim under this warranty if your water heater a Does not have its original serial numbers or rating labels b Is not installed in Australia 5 HOW TO MAKE A CLAIM UNDER THIS WARRANTY 5 1 If you wish to make a claim under this warranty you need to a Contact Rheem on 131031 and provide owner s details address of the water heater...

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