FAST T CONTINUOUS FLOW WALL HUNG BALANCED FLUE HEATERS FOR NATURAL GAS AND LPG WHX42 WHX56 LWHX42 LWHX56 T H I S M A N U A L M U S T B E K E P T W I T H T H E A P P L I A N C E November 2005 Part No.
The attention of U.K. users is drawn to their responsibilities under the Health and Safety Regulations 1993. All installation and service on the Andrews Water Heater must be carried out by properly qualified personnel, and therefore no liability can be accepted for any damage or malfunction caused as a result of intervention by unauthorised personnel.
12813 182x257 External 30/11/05 14:08 Page 3 CONTENTS PAGE Included Accessories Optional Accessories Quick Connect Multi System Installation Before Installation Choosing Installation Site Installation Clearances Installation Gas Piping Water Piping Electrical Wiring 10-11 Commissioning 12-13 Dimensions 14-15 Optional Accessories Guide Servicing Disassembly of each part 17-23...
Installation Manual GAS WATER HEATER WHX42, LWHX42 (External) WHX56, LWHX56 (External) WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Potential dangers from accidents during installation and use are divided into the following three categories.
The following accessories are included with the unit. Included Accessories Check for any missing items before starting installation. Part Shape Part Shape Q’ty Q’ty Installation Manual Owner's Guide (this document) Tapping Screw The accessories listed below are not Optional Accessories included with the units, but may be necessary for installation.
Quick Connect Multi System Installation • The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord. The Quick Connect Cord is 2m. long. Install the two units 470mm-950mm apart at the center to ensure the cord will be able to reach between the units.
Before Installation Caution Check the Gas • Check that the rating plate indicates the correct type of gas. Check that the gas supply line is sized for 62.3 kW for this unit. Check the Power • The power supply required is 230V AC, at 50Hz.
Choosing Installation Site * Locate the appliance in an area where leakage from the unit or connections will not result in damage to the area adjacent to the appliance or to the lower floors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance.
Installation Clearances Caution Before installing, check for the following: Install in accordance with relevant building and mechanical codes, as well as any local, state or national regulations. Item Check Illustration • Maintain the following clearances from both combustible and 600 mm non-combustible materials.
Installation Securing to the wall • The weight of the device will be applied to the wall. If the strength of the wall is not suffi- cient, reinforcement must be done to prevent the transfer of vibration. • Do not drop or apply unnecessary force to the device when installing. Internal parts may be damaged and may become highly dangerous.
Gas Piping Follow the instructions from the gas supplier. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 35 mbar. The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 35 mbar.
If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact ANDREWS WATER HEATERS TECHNICAL DEPARTMENT FOR ADVICE.
Consult a qualified electrician Electrical Wiring for the electrical work. Do not connect electrical power to the unit until all electrical wiring has been completed. i) "A means of disconnection from the supply mains having a contact separation in all poles must be pro- vided to allow for full disconnection".
Remote Controller • Applicable Model WHX42, WHX56, LWHX42, LWHX56 Main Remote controller RC-7508M * Up to three remote controllers can be connected. Additional remote controllers cannot be con- nected by themselves. The remote controller must be installed in accordance with the installation manual enclosed in the •...
The installer should test operate the unit, explain to Commissioning the customer how to use the unit, and give the owner this manual before leaving the installation NOTE: The appliance has been factory set and no adjustment is necessary. • Preparation ... (1) Ensure all lines are purged / flushed of debris prior to connection to appliance. (2) Open the shut off valve on the water supply, check that water passes through the valve and close the valve.
Lighting Instructions This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. 1. Read the safety information in the installation manual or on the front of the water heater. 2. Turn off all electrical power to the unit. 3.
Dimensions (unit: mm) WHX42, WHX56, LWHX42, LWHX56 (VIEW FROM TOP) GAS INLET (3/4) HOT WATER OUTLET (3/4) COLD WATER INLET (3/4) WIRING THROUGHWAYS FLUE COLLAR UPPER WALL MOUNT BRACKETS AIR INLET LOWER WALL MOUNT BRACKETS BOTTOM BOTTOM OF CASE OF CASE...
For Installers: Optional Accessories Guide Read this installation guide carefully before carrying out installation. Remote Controller Installation Manual Model Number: RC-7508M Note Do not connect power to the water heater before the remote controller has been properly installed. Included Accessories Part Shape Part...
Servicing Important Notes To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced at regular intervals. The frequency of servicing will depend upon the particular installation and usage, but in general once a year should be enough. It is the Law that any servicing is carried out by a competent person.
(2) Remove the 2 locking screws of the transformer, then pull out. 2. Removing the electric board (1) Remove the locking screws at the top and bottom and ground screw, then pull board out. 3. Removing the manifold • Remove the electric board and fixing plate of the ground-fault circuit interrupter in advance.
(2) Remove the fasten terminal of the gas electromagnetic valve, then remove the 4 manifold locking screws. (3) Pull up and remove the manifold. 4. Removing the hot-water supply fan • Remove the electric board, manifold and intake gas pipe in advance. (1) Remove the 3 fan locking screws, then pull out.
(2) Pull out the fan motor. 5. Removing the gas electromagnetic valve block • Remove the electric board and manifold in advance. (1) Remove the gas electromagnetic valve locking screw. (2) Pull up the gas electromagnetic valve to the upper section and remove it.
6. Removing the mixing tube block • Remove the electric board and connectors in advance. (1) Remove the locking screw of the intake water pipe and the locking quick fastener of water flow sensor set 3 of the heat exchanger, then pull out the intake water pipe.
(4) Pull up the mixing tube block to the upper section and remove it. 7. Removing the heat exchanger • Remove the electric board, manifold, mixing tube block and connectors in advance. (1) Remove the 3 locking screws at the bottom of the burner case.
External outfitting WHX42AD,WHX56AD Part Nos. Part Names Order Nos. Q'ty/unit WHX56AD Front set-AS SKA7262 Front packing S AAPL015 Front packing L AAPL017 Lamp seal plate DECK008 Piping label EDMK004 Exhaust top W ELEF005 Exhaust box flange packing CRP CRPL007 Front top packing Q CZR CZRL001 Exhause box SET DHNF001...
Combustion unit and gas route WHX42AD,WHX56AD Page 25 05.6.16, 7:27 PM...
Combustion unit and gas route WHX42AD,WHX56AD Part Nos. Part Names Order Nos. Q'ty/unit Combustion tube set EAC SET-V SBP7302 Flame rod DLK SET-V SBA7506 Plug packing(for N) DLK DLKL012 Ignition plug Q(N)SET-V SBA7504 Burner sensor DLK SET-V SBA7505 Plug fixing plate(for N) DLKC009 Suction air joint packing DHN DHNL002...
Electronic control unit WHX42AD,WHX56AD Page 30 05.6.16, 7:27 PM...
Electronic control unit WHX42AD,WHX56AD Part Nos. Part Names Order Nos. Q'ty/unit Relay case ELE SET-AS SHA7826 Harness AD ELEJ031 Lamp cable conduit CRPJ014 Relay case cover DEKA014 Mounting plate for terminal block DZTA006 Current leakage safety device 240 EJS EJSJ022 Neutral indication label ELEK068 Power supply cord ELE...
Remote controller and Attached set WHX42AD,WHX56AD Remote controller kitchen remote controller (RC-7508M) Attached set <Special part> Special part Special part no. Owner's Guide installation manual Page 32 05.6.16, 7:27 PM...
Remote controller and Attached set WHX42AD,WHX56AD Part Nos. Part Names Order Nos. Q'ty/unit RC-7508M Body AD(SE) QPA QPAJ013 M Dressed frame body AD(SE) QPAA013 Oar plug 6X25 6339000 Cross recessed flat-head screw M4X35 SHB6879 Cross recessed flat-head wood screw (All screw)4.1X20 SHC6365 GQ3211WZ-2AD packing set V SKA7264...
• Specifications may be changed without prior notice. Specifications • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name WHX42 LWHX42 Type Installation External, Wall Hanging Air Supply/Exhaust Power Vented Ignition...
Specifications Specification Item Model Name WHX56 LWHX56 Type Installation External, Wall Hanging Air Supply/Exhaust Power Vented Ignition Direct Ignition Minimum Pressure for Maximum flow 2.0 bar Minimum Flow Rate 3.5 L/min. Dimensions 61.5 cm(Height) x 46.4 cm(Width) x 24 cm(Depth) Weight 30 kg Water Holding Capacity...