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Noritz N-0842MC-DV, Installation Manual, Page: 6 / 34

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Noritz N-0842MC-DV Installation Manual Download Page 6

6

• Avoid installation above gas ranges or stoves.

• Avoid installation between the kitchen fan and stove. If oily

fumes or a large amount of steam are present in the installation
location, take measures to prevent the fumes and steam from
entering in the equipment.

• Install in a location where the exhaust gas flow will not be

affected by fans or range hoods.

• Take care that noise and exhaust gas will not affect neighbors.

• Before installing, make sure that the exhaust flue termination will

have the proper clearances according to the National Fuel Gas
Code (ANSI Z223.1).

State of California: The water heater must be braced, anchored or strapped to avoid moving during an
earthquake.  Contact local utilities for code requirements in your area or call: 1-866-766-7489 and request
instructions.

Be sure to do

Prohibited

Prohibited

CAUTION

The Commonwealth of Massachusetts: The water heater can be used for domestic hot water only and not
in a combination of domestic and space heating.

Summary of Contents for N-0842MC-DV

Page 1: ... in this manual are not covered by the warranty Check that the installation was done properly in accordance with this Installation Manual upon completion After completing installation please either place this Installation Manual in a plastic pouch and attach it to the side of the water heater or the inside of the pipe cover or recess box if applicable or hand it to the customer to retain for futur...

Page 2: ... 1 2 Optional Accessories The accessories listed below are not included with the units but may be necessary for installation Q ty Shape Part Part Shape Q ty Remote Controller Cord 26 ft Quick Connect Cord 1 1 1 Isolation Valves includes pressure relief valve Owner s Guide Warranty Installation Manual this document System Controller 1 Bird Screen for 4 PVC VT4 PVCS Bird Screen for 3 PVC VT3 PVCS 2 ...

Page 3: ... length between the two units When connecting two units use only a single remote controller Note Connect the remote controller to only one of the units System Diagram Insulate the hot water piping to prevent heat loss Insulate and apply heating materials to the cold water supply piping to prevent heat loss and freezing of pipes when exposed to excessively cold temperatures Union Make this distance...

Page 4: ...can lead to unpredictable output temperatures and possibly scalding If absolutely necessary use mixing valves to ensure output temperatures do not get to scalding levels Do not use a solar pre heater with the quick connect multi system Precautions on Vent Pipe Replacement The vent system will almost certainly need to be replaced when this appliance is being installed Only use vent materials that a...

Page 5: ... as a result Avoid installation in places where special chemical agents e g hair spray or spray detergent are used Ignition failures and malfunction may occur as a result Carbon Monoxide Poisoning Hazard Do not install this water heater in a recreational vehicle or on a boat The water heater is designed for indoor installation only Never install it outdoors or in a bathroom it may be damaged or a ...

Page 6: ...t gas will not affect neighbors Before installing make sure that the exhaust flue termination will have the proper clearances according to the National Fuel Gas Code ANSI Z223 1 State of California The water heater must be braced anchored or strapped to avoid moving during an earthquake Contact local utilities for code requirements in your area or call 1 866 766 7489 and request instructions Be su...

Page 7: ...is restriction will not be applied to an area where an effective shield makes a clearance of 24 or more in front of the exhaust outlet Check Illustration If possible leave 8 or more on either side of the unit to facilitate inspection If possible leave 24 or more in front of the unit to facilitate maintenance and service if necessary If possible leave 3 or more above and below the vent pipe to faci...

Page 8: ...embly 3 within a height 15 above meter regulator assembly I Service regulator vent outlet 3 J Nonmechanical air supply inlet or combustion air inlet to any other appliance 12 36 K Mechanical air supply inlet 3 above if within 10 6 L Above paved sidewalk or paved driveway located on public property Under veranda porch deck or balcony 7 M indicates clearances required in Canada Maintain clearances i...

Page 9: ...or apply unnecessary force to the device when installing Internal parts may be damaged and may become highly dangerous Install the unit on a vertical wall and ensure that it is level Locating Screw Holes Mounting Structure When installing with bare hands take caution to not inflict injury Be careful not to hit electrical wiring gas or water piping while drilling holes Item CAUTION Be sure to do Mo...

Page 10: ... the neutralizer unit is filled with water 1 Fill the neutralizer unit by pouring approx 17 oz 500ml of water into the exhaust accessory on the top of the appliance as illustrated below Or if the vent pipe has already been installed 2 After installing the drain pipe make sure that the area around the appliance is well ventilated open a window or a door if necessary Then operate the unit and verify...

Page 11: ...ect more than one appliance to this venting system The total vent length including horizontal vertical vent runs should be no less than 3 Do not store hazardous or flammable sub stances near the vent termination and check that the termination is not blocked in any way Steam or condensed water may come out from the vent termination Select the location for the termination so as to prevent injury or ...

Page 12: ...rs and debris from joints and fittings o All joints must be properly cleaned primed and cemented Use only cement and primer approved for use with the pipe material as outlined in the above table PVC or CPVC pipe has been approved for use on this appliance with zero clearance to combustibles All piping must be fully supported Use pipe hangers at a minimum of 3 foot intervals Do not use the water he...

Page 13: ...zontal vent 1 4 upwards for every 12 toward the termination Use a condensation drain if necessary In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment Please refer to Technical Bulletin TB 010606 for full installation in structions As illustrated on the left make sure to keep a distance of 3 or wider between the intake...

Page 14: ...223 1 NFPA 54 Slope the horizontal vent 1 4 upwards for every 12 Use a condensation drain if necessary In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment Please refer to Technical Bulletin TB 010606 for full installation in structions PVC CPVC Coupling Slope vent Upwards 1 Minimum Pipe diameter No of Elbows 3 10 2 13...

Page 15: ...consult local codes or the National Fuel Gas Code ANSI Z223 1 Natural Gas Meter See next page for the pipe capacity charts Noritz Condensing Tankless Gas Water Heater 199 900 Btuh Clothes Dryer 35 000 Btuh Barbecue 50 000 Btuh Gas Range Stove 65 000 Btuh 10 10 10 10 5 5 5 5 Gas Fireplace 25 000 Btuh Instructions 1 Size each outlet branch starting from the furthest using the Btuh required and the l...

Page 16: ... 0 5 WC Pressure Drop Length in Feet Pipe Size 3 4 1 1 1 4 1 1 2 2 10 20 30 40 50 60 70 80 90 100 150 200 206 383 614 1261 2934 147 269 418 888 2078 121 218 334 723 1698 105 188 284 625 1472 94 168 251 559 1317 86 153 227 509 1203 80 141 209 471 1114 75 132 194 440 1042 71 125 181 415 983 67 118 171 393 933 55 94 137 320 762 48 82 116 277 661 R Maximum Capacity of Flex TracPipe in Thousands of Btu...

Page 17: ...tem or components previously used with a nonpotable water heating appliance When water is required in one part of the system at a higher temperature than in the rest of the system means such as a mixing valve shall be installed to temper the water to reduce the scald hazard Installation and service must be performed by a qualified plumber In the Commonwealth of Massachusetts this product must be i...

Page 18: ... wet the floor If neces sary provide drain piping or use a drain hose to remove the water Hot water piping Do not use lead PVC iron or any piping which has been treated with chromates boiler seal or other chemicals The longer the piping the greater the heat loss Try to make the piping as short as possible Use mixing valves with low water resistance Use shower heads with low pressure loss If necess...

Page 19: ...nal Sediment Filter Water Treatment Device Shutoff Valve Type of Water Hardness Level Treatment Device Flush Frequency Type of Water Hardness Level Treatment Device Flush Frequency Soft 0 1 gpg 1 3 gpg 0 17 mg L None None None None None None Slightly Hard 17 51 mg L None None Moderately Hard Hard 3 7 gpg 51 120 mg L ScaleShield Once a Year Once a Year Twice a Year Once a Year 7 10 gpg 120 171 mg L...

Page 20: ...orrode when placed into contact with water Keep the length of the drain pipe as short as possible Long runs or applications where the nearest drain is above the water heater will require the use of a condensate pump Size the pump to allow for a maximum condensate discharge of 2 GPH from the water heater Horizontal runs must be sloped 1 4 per foot towards the drain or condensate pump The end of the...

Page 21: ...the pump 3 Use an Aquastat if the water heater is not control ling the pump Set the Aquastat to 10 F below the set output temperature 4 Noritz recommends the use of an Isolation Kit with the installation These kits include an integrated shut off and serv ice valve with unions and a pressure relief valve Notes 1 Noritz recommends the use of an Isolation Kit with the installation These kits include ...

Page 22: ...he water heater Putting the redundant length of cord inside the water heater may cause electrical interference and faulty operation Disconnect Power Electrical Shock Hazard Do not turn power on until electrical wiring is finished Disconnect power before servicing Failure to do so may result in death or serious injury from electrical shock WARNING Electrostatic discharge can affect electronic compo...

Page 23: ...NNECTOR tag connector to 180 F tag connector as shown on the right 5 Replace the front cover of the water heater 4 screws 6 Reconnect electrical power to the water heater but do not turn it on 7 Press and hold the FLOW METER ALARM SET button until a sound is heard 2 sec and 120 F appears on the display 8 Set the upper limit of the hot water supply temperature to 125 F 130 F 135 F 140 F 145 F 150 F...

Page 24: ...e and cause problems Be sure to hand tighten when screwing to the terminal block Power tools may cause damage to the terminal block 1 Check to make sure that the remote controller cord has plenty of slack in order to reach the external connection terminal block 2 Disconnect electrical power to the water heater 3 Remove the single screw securing the terminal block cover and then remove the cover 4 ...

Page 25: ...om a wall circuit to the pump 5 Replace the front cover Pump Wiring This feature is not available when using the Quick Con nect Multi System feature Relay connection with larger pumps 85 W 1 Locate and prepare the pump control wires as described above 2 Choose a suitable installation location for the relay where it will be protected from moisture 3 Connect the pump control wires from the heater to...

Page 26: ...Black 3 White 4 Green 5 Blue 6 Blue 1 White 2 Green 3 Red 4 Black 5 Blue 6 Blue Connecting the Quick Connect Cord to the two units 1 Turn off the power 2 Remove the front cover of the heater 4 screws 3 Pass the Quick Connect Cord through the wiring throughway and into the unit 4 Plug the connector on the Quick Connect Cord to the receptacle inside the unit 5 Attach the ground wire of the Quick Con...

Page 27: ...or a proper blue color and consistency If the flame does not appear normal the burner may need to be cleaned If the burner needs to be cleaned it must be performed by a qualified service technician Do not obstruct the flow of combustion and ventilation air The pressure relief valve must be operated once a year to ensure that it is functioning properly and there is no obstruction Turn the power off...

Page 28: ...power to the unit 8 The unit will now operate whenever hot water is called for If the unit will not operate follow the shutdown instructions and call a service technician Shutdown Instructions 1 Stop any water demand 2 Turn off electric power 3 Turn the gas control manual valve clockwise to the off position Should overheating occur or the gas supply fail to shut off turn off the manual control val...

Page 29: ... for every six units inch 9 1 5 9 FLUE COLLAR LED AIR INLET WATER FILTER WIRING THOROUGHWAY GAS INLET WATER DRAIN VALVE AC120V WIRING THOROUGHWAY COLD WATER INLET WATER DRAIN VALVE HOT WATER OUTLET WATER DRAIN VALVE CONDENSATE DRAIN WIRING THOROUGHWAY WIRING THOROUGHWAY AC120V VIEW FROM TOP HOT WATER OUTLET 3 4 CONDENSATE DRAIN 1 2 WIRING THOROUGHWAY GAS INLET 3 4 WIRING THOROUGHWAY COLD WATER INL...

Page 30: ...ation with a Multi System This system will make hot water more quickly available to remote fixtures The pump will circulate water through the loop until the entire loop is warm and then the system controller will turn off the pump until the loop cools down Size the pump to provide at least 2 GPM 10 feet of head piping losses through the system Check the maintenance monitors on the unit to make sur...

Page 31: ...Control When installing 2 pumps in parallel The system controller will stop the units from heating when the tank is up to temperature and the unit will cut the flow through it to 2 6 GPM Install the plumbing so that a change in flow will not damage the pump Thermostat System select connector Connect to the Sto rage system connector Pump Control Wires use external relay Also disconnect this connect...

Page 32: ...sconnect this Connector Disconnect this Connector Disconnect for system controller Disconnect for system controller Disconnect this Connector Remote Controller Cord PCB Power PCB PCB Power PCB Disconnectforsystemcontroller Multi System Wiring Use SC 201 6M The connector location may be slightly different on the actual circuit boards than in these illustrations The remote controller terminal locati...

Page 33: ...Notes on the Installation Location The remote should be installed in an easily accessible location Avoid installing in a place where water or steam can come into contact with the controller Avoid locations where special chemical agents e g benzene fatty and oily deter gents are used Avoid outdoor installation or installation in an indoor location where it will be exposed to direct sunlight Connect...

Page 34: ...cord Phillips Roundhead Wood Screw Wall Anchor 3 Remove the cover of the remote control mark the location of the screw holes and drill holes for the wall anchors 4 Insert the wall anchors screw the remote control to the wall and replace the cover Remote Controller Cord Wall Packing take off the paper Remote Control Wires Rear Side of Remote Controller ...

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