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Noritz GQ-C2660WXQ-FF US Installation Manual
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Noritz GQ-C2660WXQ-FF US Installation Manual

Condensing tankless gas water heater
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CONDENSING TANKLESS GAS WATER HEATER
Installation Manual
Models : NRCR111DV (GQ-C3260WXQ-FF US)
NRCR92DV (GQ-C2660WXQ-FF US)
WARNING
If the information in these instructions is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or
death.
• Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use
any phone in your building.
- Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
- If you cannot reach your gas supplier, call the
fire department.
• Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1 / NFPA
54 - latest edition and/or the Natural Gas and Propane Installation Code CSA B149.1 - latest edition.
When applicable, installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR,
Part 3280 or the Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products
without notice.
Contact Noritz America at 1-866-766-7489, if you have any questions or concerns.
NORITZ America Corporation
CAUTION
Requests to Installers
• In order to use the Water Heater safely, read
this installation manual carefully, and follow the
installation instructions.
• Failures and damage caused by erroneous work
or work not as instructed in this manual are not
covered by the Noritz America Limited Warranty.
• Check that the installation was done properly in
accordance with this Installation Manual upon
completion.
• After completing installation, 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 future
reference. Also, be sure to fill in all of the
required items on the warranty and to hand
the warranty to the customer along with the
Owner's Guide.
SBB8168
Rev. 05/19
Low NOx Approved by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)

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Summary of Contents for Noritz GQ-C2660WXQ-FF US

  • Page 1 When applicable, installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86. Noritz America reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice.
  • Page 2 Contents Before Installation Connecting the Water Supply 8.1 Overview of the Recirculation System ..........41 About the Water Heater 8.2 Installation ........42 2.1 Included Accessories ....... 5 8.3 Water treatment ......45 2.2 Optional Accessories ....... 5 2.3 Specifications ........7 Connecting the Condensate Drain 47 2.4 Dimensions ........
  • Page 3 This product can expose you to chemicals including 165,000 Btu/h: lead, lead compounds and carbon bisulfide which NRCR92DV (GQ-C2660WXQ-FF US) are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to e.g.
  • Page 4 CAUTION Do Not Use Appliance for Purposes Other Than Those Specified Do not use for other than increasing the temperature of the water supply, as unexpected accidents may occur as a result. Check Water Supply Quality If the water supply is in excess of 12 grains per gallon (200 mg/L) of hardness, acidic or otherwise impure, treat the water with approved methods in order to ensure full warranty...
  • Page 5 2 About the Water Heater 2.1 Included Accessories 2.2 Optional Accessories The following accessories are included with the The accessories listed below are not included Water Heater. with the Water Heater, but may be necessary for Check for any missing items before starting installation.
  • Page 6 Canada and USA Plastic Rain Cap [PRC-1] Not approved for use in Canada. Noritz Connect Wireless Adapter NWC-ADAPTER (× 1) [NAW-1 US] Noritz Connect Wireless Adapter enables users to: • Remote control (Power ON/OFF, Adjust set...
  • Page 7 • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Item Specification Model Name NRCR111DV (GQ-C3260WXQ-FF US) NRCR92DV (GQ-C2660WXQ-FF US) Installation Indoor / Outdoor Wall mounted Type Air Supply / Exhaust Power Vented...
  • Page 8 2.4 Dimensions WALL MOUTING BRACKET (INCLUDED ACCESSORY) 7×Φ0.2”[Φ6] 0.3”[8] 14.1”[359] 16.0”[406] 3.5”[89] 1.1”[27] 10.2”[260] 5.1”[130] 3×0.5”×1.6”[12×40]RECTANGLE HOLE 7.2”[183] 10.2”[260] 1.6”[40] 2.1”[5.3] 0.4”[10] 2.2”[56] 3.9”[100] 5.2”[132] 6.7”[169] 8.1”[206] 2×0.4”×0.24”[10×6]OBLONG HOLE 4×Φ0.5”[Φ13] 4×0.24”×0.6”[6×15]OBLONG HOLE About the Water Heater...
  • Page 9 <inch [mm]> 17.8”[452] 18.5”[471] 17.8”[451] 5.1”[130] 10.1”[256] I.DΦ2.4”[Φ61] I.DΦ2.4”[Φ61] AIR INLET FLUE COLLAR (VIEW FROM BOTTOM) COLD WATER INLET(3/4”) GAS INLET(3/4”) WIRING THROUGHWAY HOT WATER RETURN(3/4”) WATER DRAIN VALVE WATER DRAIN VALVE (WATER FILTER) WIRING THROUGHWAY (AC120V) WATER DRAIN VALVE HOT WATER OUTLET(3/4”) 1.7”[42] 5.7”[144]...
  • Page 10 2.5 External View Indoor Installation Intake Pipe Exhaust Pipe Flex Vent 2 in. Conversion Kit Water Drain Valve (with Water Filter) Hot Water Return Valve Water Supply Valve Pressure Relief Valve Outdoor Installation Hot Water Valve Gas Supply Valve Outdoor Vent Cap Condensate Drain Pipe About the Water Heater...
  • Page 11 3 Choosing an Installation Location DANGER CAUTION Do not install in the following places Locate the vent terminal and make sure there are no obstacles around the termination for • A location where it is not free from obstacles exhaust to accumulate or be obstructed. and stagnant air.
  • Page 12 Perform suggested treatment and maintenance measures in reference to “8.3 Water Treatment”. Damage to the Water Heater as a result of the below is not covered by the Noritz America Limited Warranty. - Water in excess of 12 gpg (200 mg/L) of hardness...
  • Page 13 ANSI Z223.1 / NFPA 54 - latest edition. In Canada, see the Natural Gas and Propane Installation For Venting Manufacturers Requirements, see the Code CSA B149.1 - latest edition for detailed Noritz America website (www.noritz.com). requirements. 4.1 Indoor Installation Required Clearances From the Water Heater Maintain the clearances from both combustible and non-combustible materials.
  • Page 14 Cooking Equipment Surrounding the area of installation When utilizing an indoor air supply, if the Water [When installing the Water Heater in a common side Heater will be installed in the vicinity of a corridor] permanent kitchen range or stove that has the possibility of generating steam that contains fats the bottom edge of or oils, use a dividing plate or other measure to...
  • Page 15 Finally, make sure the bracket can support the weight of the Water Heater. Intake Vent Exhaust Vent (Not supplied Anchoring from Noritz.) Screw 3. Affix the Mounting Bracket (Lower) to the wall by 2 screws. Intake Exhaust Vent Vent Wall Mounting...
  • Page 16 5.2 Elevation Adjustment Above 2,000 ft 5.3 Filling the condensate container with water • Adjust the DIP switches as illustrated in the table below, if this Water Heater is installed at an DANGER altitude of 2,000 ft (610 m) or higher. •...
  • Page 17 6 Venting the Water Heater • This Water Heater must be vented with plastic WARNING pipe materials as specified in the table below. Vent installations in Canada which utilize plastic CARBON MONOXIDE POISONING vent systems must comply with ULC S636. Follow all vent system requirements in accordance with relevant local or state [Exhaust Vent / Air Intake]...
  • Page 18 • Use only solid PVC / CPVC (schedule 40) or PP - DuraVent® - Flex Through Chimney w/ Air Intake pipe. Exhaust Flex Chimney Lining Kit (3 in.): 3PPS-FKL, • 2 in. or 3 in. schedule 80 pipe may also be used Flex Length (3 in.): 3PPS-FLEXxx on this Water Heater, however the Btu/h input of Intake Aluminum Flex Length (3 in.): 3DFA-xx,...
  • Page 19 For 2 in. flexible PP material • Ensure at least 3 ft (0.9 m) or more distance between the • Flex Vent 2 in. Kit may be used only in near edge of the air intake accordance with the installation manual pipe or exhaust pipe to the included with the kit.
  • Page 20 Maximum equivalent vent length* NOTE Below are additional models Vent Maximum # Equivalent V (Vertical) approved for use by Noritz and diameter of elbows* length supplied by IPEX. Refer to the IPEX H (Horizontal) literature or web site for additional 90°...
  • Page 21 [DIP Switch Adjustment] Maximum Vent Length Configurations (For flexible ● ○ ON = / OFF = pipe for chimney) DIP switches Vent length condition [DuraVent® - Flex Through Chimney w/ Air Intake ○ ○ Less than 33 ft using 2 in. (50 mm) pipe ①...
  • Page 22 [Centrotherm® - Flex Through Chimney w/ Air Intake (Only 3 in.)] The vent length condition setting depends on the flexible pipe length, the rigid pipe length and number of elbows. Calculate an each ventilation system equivalent length, then adjust the DIP switch.
  • Page 23 This Water Heater is suitable for Common Vent System. To make a Common Vent System, refer to Direct Vent the Common Vent installation manual or contact Exhaust Noritz America at http://support.noritz.com/ or 1-866-766-7489 for details. Combustion air is Combustion supplied from the Exhaust outdoors.
  • Page 24 6.4 Vent Pipe Installation (Direct Vent) 6.4.1 Clearance Requirements from Vent Terminations to Building Openings [When supplying combustion air from the outdoors] • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1. [ D ] Vent Terminal Ven lated soffit...
  • Page 25 6.4.2 Horizontal Vent Termination For Horizontal Vent Termination - PVC/CPVC Material Only • 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. Refer to Technical Bulletin TB 010606 for full installation instructions. Ceiling Hanger Straps Exhaust...
  • Page 26 Alternate Horizontal Vent Termination- PVC, CPVC or PP Material (When 3 ft (0.9 m) distance between Intake and Exhaust cannot be ensured.) WARNING • If the distance between the air inlet and exhaust vent terminations is too short, the Water Heater will draw in the exhaust gases through the intake.
  • Page 27 For Horizontal PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Water Heater flue to the termination.
  • Page 28 6.4.3 Vertical Vent Termination For Vertical Vent Termination - PVC, CPVC or PP Material About the termination • When choosing intake and exhaust terminations, you must use the same type of elbow (i.e. both 90° elbows). This will help with proper combustion by putting both terminations in the same pressure zone. •...
  • Page 29 For Vertical PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Water Heater flue to the termination.
  • Page 30 6.5 Vent Pipe Installation (Non-Direct Vent) 6.5.1 Clearance Requirements from Vent Terminations to Building Openings [Other than Direct Vent] • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1. [ D ] Vent Terminal Ventilated soffit...
  • Page 31 Water Heater to reset the system. • SV Conversion Kit SV-CK-2 is required for the air intake. • Noritz recommends a carbon monoxide alarm installed in same room space as Water Heater when supplying combustion air from the indoors. WARNING...
  • Page 32 • If combustion air will be provided through a duct, size the duct to provide as below. - NRCR111DV (GQ-C3260WXQ-FF US): 70 ft of fresh air per minute - NRCR92DV (GQ-C2660WXQ-FF US): 58 ft of fresh air per minute Venting the Water Heater...
  • Page 33 6.5.4 Horizontal Vent 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. Refer to Technical Bulletin TB 010606 for full installation instructions. Either a tee or the PVT-HL termination may be used for the vent termination.
  • Page 34 6.5.5 Vertical Vent Termination For SV Conversion Kit About the termination • Insert Bird Screen in End of 90° Elbow. Bird Screen is not supplied with water heater, order separately. • To prevent excessive condensation formation, only the vent termination should be located on the exterior of the building. •...
  • Page 35 For Flex Vent 2 in. Conversion Kit WARNING This Water Heater is suitable only for vertical vent. About the termination To prevent excessive condensation formation, only the vent • The combustion termination should be located on air intake of any ≥...
  • Page 36 6.6 Outdoor Installation • When installing this Water Heater outdoors, the “Outdoor Vent Cap (VC-6)” must be used. • Refer to the instructions provided with Outdoor Vent Cap for additional detail. • Disconnect the electrical power and then turn ON DIP switch #2 if outdoor installation.
  • Page 37 • If test pressures are in excess of 1/2 psi (3.5 kPa), Improper installation of this kit will void the Noritz the appliance and its individual shut off valve America Limited Warranty.
  • Page 38 Pipe Sizing [Calculation Example] A partial set of sizing tables are printed on page 40. • A gas shut off valve must be installed on the In cases where these tables are not appropriate, supply line. refer to the NFPA. •...
  • Page 39 Final Check 4. • Enter the demand is the amount of gas flowing through a section of pipe in the table below. 1. Turn on and operate all gas appliances including - For natural gas, use total Btu/h rating/1000 the Water Heater. /h).
  • Page 40 [Gas pipe sizing tables] • These tables are for reference only. Consult gas pipe manufacturer for actual pipe capacities. • It is an example of Schedule 40 Metallic Pipe. • (Only Table 1 - 4) Values in Table are in ft3 of Gas per Hour. Contact your gas supplier for Btu/ft3 ratings. For simplification of your calculations, 1 ft3 of Gas is approximately equivalent to 1,000 Btu.
  • Page 41 Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. • Observe all applicable codes. • Noritz recommends to install insulation to the hot water line and the hot water return line for comfort and energy saving.
  • Page 42 NOTE Crossover valve passes cold water, therefore Water Heater will operate and recirculate automatically even without direct hot water usage. Isolation Kit Noritz recommends the use of an Isolation Kit with the installation. These kits include an integrated shut-off and service valve with unions and a pressure relief valve. Water...
  • Page 43 Supply Systems, ANSI Z21.22 (in the U.S. only). and water flow. • A temperature relief valve is not required, but • Noritz recommends the installation of a wye if one is used, do not install the valve with the pattern strainer downstream on the hot water probe directly in the flow of water.
  • Page 44 Outdoor Installation 8.2.2 Freeze Prevention • Freezing is prevented within the Water Heater Perform the following insulation measures for automatically unless the outside temperature prevention of freezing. without wind is below -4°F (-20°C). • Take appropriate heat insulation measures (e.g. •...
  • Page 45 > 12 gpg Extremely Hard (> 200 mg/L) NOTE Damage to the Water Heater as a result of the items below is not covered by the Noritz America Limited Warranty. • Water in excess of 12 gpg (200 mg/L) of hardness •...
  • Page 46 Scale Build-up. Exchanger” on page 69. Refer to the “Procedure for flushing the Heat After completing the flushing, the code will be Exchanger” on page 69 or contact Noritz America reset. for more information. (http://support.noritz.com/ or 1-866-766-7489) To deactivate the code “C1#”, disconnect the red...
  • Page 47 NOTE Damage caused by improperly handled condensate is not covered by Floor drain the Noritz America Limited Warranty. MAINTAIN CLEARANCE Location of the condensate drain piping In climates where temperature routinely reaches [Condensate drain piping with pump] below freezing, do not drain the condensate to the outdoors.
  • Page 48 After installing the condensate drain piping • Make sure that there are no obstructions blocking the condensate drain line from discharging condensate. • Be sure to check that condensate is freely flowing from the condensate drain piping. Condensate will begin flowing out of the Water Heater within 15 minutes after operation has started.
  • Page 49 10 Connecting Electricity Ground Consult a qualified electrician for the electrical work. To prevent electrical shock, provide a ground with resistance less than 100 Ω. 10.1 Water Heater An electrician should do this work. NOTE • Do not connect the ground to the This appliance must be electrically grounded in city water or gas piping.
  • Page 50 24 Part 6. • This Water Heater is compatible with on-demand switch, wireless switch and motion sensor. All on- On-demand SW Receiver of wireless demand swithches are not supplied from Noritz, on-demand switch or just field purchasing. Connect to motion sensor output on-demand switch •...
  • Page 51 4. Cut the Thermo-sensor wire (Looped White) in NOTE Do not connect the Remote Controller the Water Heater. to both Water Heaters. Thermo-sensor If the Remote Controller is connected Wire Tag to both Water Heaters, disconnect unneccesary Remote Controller prior 5.
  • Page 52 11 Installation of the Remote Controller Installation of Remote Controller Cord 11.1 General Requirements • Secure the Remote Controller Cord with • (RC-7651M-A) The Remote Controller is water appropriate anchors, ties, etc. resistant but not water proof. Keep it as dry as •...
  • Page 53 Installation Adjusting the Temperature / Water Quantity Display 1. Apply the Mounting Packing to the rear side of the Remote Controller. 2. Connect the Remote Controller wires to the cord supplied with the Water Heater. Remote controller wires Mounting Packing (take off the paper) 1.
  • Page 54 Limiting the Maximum Output Temperature 11.3 RC-9018M The maximum output temperature can be limited to Included Accessories prevent discharging hot water at too high of a temperature. Remote Controller (× 1) Default setting of maximum output temperature is 120°F (50°C). DANGER •...
  • Page 55 Installation 1. Attach the Mounting Bracket to the wall. The parts to be used vary depending on the attachment method. NOTE Never use electric drivers, impact drivers, etc. Tightening with excessive force may result in deformation of the Mounting Bracket and/or failures. [When attaching to a junction box] Use the Flat Head Machine Screws to attach the Junction box...
  • Page 56 2. Remove the cover from the Remote Controller. 5. Secure the remote controller wires by winding (The cover is set in the Remote Controller.) them around the notches. [For wiring inside the wall] Pass the remote Remote controller wires controller through the Main remote wires...
  • Page 57 [To remove the cover after installation of the 3. Press the “MENU” button inside the cover, Remote Controller] select “Initial settings” using the buttons. 4. Press the “ENTER” button, the “Initial settings” screen appears on the display. 5. Select “[°F/gal] ↔ [°C/L]” using the / buttons.
  • Page 58 12 Setting the DIP Switches The location of DIP switch bank [For adjusting to accommodate longer vent runs] • When using PVC/CPVC/PP material The DIP switch bank is placed Change DIP switch #7 and #8 by following the table on the circuit board. below.
  • Page 59 13 Setting for Recirculation NOTE • The setting changes can be Auto recirculation (Learning mode) start automatically when the Remote Controller is turned cancelled by pressing the button on. When changing other recirculation mode (e.g. before confirming the settings, or conforming to Title 24), change the setting as if the Water Heater is left alone for follows.
  • Page 60 14 Trial Operation The installer should test operate the Water Heater, 2) Repeat step 1-1) and 2). explain to the customer how to use the Water 3) Turn on the button or the Heater, and give the owner this manual before “Power”...
  • Page 61 NOTE • If an error code “63” appears 2) With a bucket ready, remove the water drain on the Remote Controller, air is valves. trapped in the cold water supply NOTE Approximately 0.85 gallon (3.2 L) of line and the hot water return line. water will drain out.
  • Page 62 Refer to the procedure for preventing damage from freezing in the Owner’s Guide. NOTICE Freezing is not covered by the Noritz America Limited Warranty. Lighting Instructions WARNING A fire or explosion may result if these instructions are not followed, which may cause lose of life, personal injury or property damage.
  • Page 63 If you answer NO to any item, installation is not complete. Review the appropriate sections to complete the installation. If you have additional questions or need assistance with installation, contact Noritz America at 1-866-766-7489. Choosing an Installation Location (See page 11 - 13) Make sure that the Water Heater is not installed in the following places.
  • Page 64 Make sure that appropriate heat insulation measures are taken according to regional climate. (e.g. wrapping with heat insulation materials, using electric heaters) (Only for crossover mode) Make sure the crossover valve is installed at the furthest fixture from the Water Heater on the hot water line. Connecting the Condensate Drain (See page 47 - 48) Make sure that the condensate drain piping is connected.
  • Page 65 Set the flow switch to deactivate the Air Handler when the Isolation Kit domestic hot water flow reaches Noritz recommends the use of an Isolation 3 GPM (11.3 L/min). Kit with the installation. These kits include Adjust as necessary to prevent an integrated shut-off and service valve cycle.
  • Page 66 17 Installation of the Quick Connect Multi-System The Quick Connect Multi-System allows the installation of two Water Heaters together utilizing only the Quick Connect Cord (part #QC-2, sold separately). System Diagram • Connect a single Remote Controller to only one of the Water Heaters. •...
  • Page 67 Typical Plumbing Insulate or apply heating materials to both the cold water supply piping and the hot water supply piping to prevent freezing during cold weather and to prevent heat loss through the piping. [With the return line] Distance on sides 3-18 in.
  • Page 68 18 Maintenance 18.1 Periodic Check • Check the following to ensure proper operation of the Water Heater periodically. • Also check the items of maintenance described in the Owner’s Guide. [Venting System] • The venting system must be examined periodically by a qualified service technician to check for any leaks or corrosion.
  • Page 69 Damage to the Water Heater due to Scale Build-up is not covered by the Water Heater’s warranty. To clear the alarm code “C1#*”, the Heat Exchanger must be flushed. If the alarm code “C1#*” is displayed and flashing on the Remote Controller, contact Noritz America (1-866-766- 7489).
  • Page 70 For Single Water Heater [Procedure 2. Cleaning the Heat Exchanger] The flushing solution needs to be rinsed and [Procedure 1. Flushing the Heat Exchanger] cleaned out of the Water Heater. 1. Open the front cover. Below is the way to rinse and clean the flushing 2.
  • Page 71 For Quick Connect Multi-System 1. Open the front covers. 2. Connect the blue connector marked “FLUSH” for Water Heater needing to be flushed. (The Water Heater is isolated from Quick Connect Multi-system when the blue connector marked “FLUSH” for flushing is connected. Do not need to disconnect the Quick Connect Cord.) Sub Water Heater Main Water Heater Remote...

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