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Potential dangers from accidents during installation and use are divided into the following three 

categories. Closely observe these warnings, they are critical to your safety.

Prohibited

Disconnect

Power

Ground

Be sure to do

WARNING:

 If the information in this manual is not followed exactly, a fire or explosion may result 

causing property damage, personal injury or death.

NORITZ AMERICA 

CORPORATION

 Installation Manual

CONDENSING TANKLESS GAS WATER HEATER

NCC300OD (GQ-C5032WZ US) 

 (Outdoor Installation)

DANGER indicates an imminently hazardous situation which, 

if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, 

if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, 

if not avoided, may result in minor or moderate injury.

DANGER

WARNING

CAUTION

SBB80YZ-1

Rev. 11/20

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 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.

CAUTION

*SBB80YZ*

FOR USE IN COMMERCIAL 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.

CERTIFIED

R

Low NOx  Approved by SCAQMD

14 ng/J or 20 ppm

(Natural Gas Only)

Summary of Contents for GQ-C5032WZ US

Page 1: ...e installation instructions Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by the warranty Check that the installation was done properly in accor...

Page 2: ...ty 1 1 Remote Controller Cord 26ft 8m 1 each Isolation Valves includes pressure relief valve Pipe Cover PC 7S 1 1 Owner s Guide Warranty Installation Manual this document 1 System Controller Unit SCU...

Page 3: ...minal Block Cord Connector Cord Connector 3 Quick Connect Multi System Installation The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord T...

Page 4: ...erature 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 i...

Page 5: ...m materials Do not locate the vent termination directed towards a window or any other structure which has glass or wired glass facing the termination Install in a location where the exhaust gas flow w...

Page 6: ...width Provide clearance of 24 600mm or more in front of the unit to facilitate inspection and repair Do install the unit in a location where the unit is out of reach such as the wall of the second flo...

Page 7: ...149 1 Natural Gas and Propane Installation Code 2 In accordance with the current ANSI Z223 1 NFPA 54 National Fuel Gas Code A vent shall not terminate directly above a sidewalk or paved driveway that...

Page 8: ...ce 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...

Page 9: ...e installer The installer must be professionally trained to do such work and must always follow all local and national codes and regulations Gas line sizing calculations must be performed for every in...

Page 10: ...ding to total btuh demand of the building and length from the meter or regulator so that the following supply pressures are available even at maximum demand WARNING Natural Gas Supply Pressure Min 5 W...

Page 11: ...se 50 15m 175 000 Btuh requires 1 Outlet E 25 7 5m Use 30 9m 300 000 Btuh requires 3 4 Section 4 45 13 5m Use 50 15m 475 000 Btuh requires 1 1 4 Natural Gas Meter Noritz Condensing Tankless Gas Water...

Page 12: ...t each appliance to verify all appliances are receiving a minimum of 5 WC for NG or 8 WC for LP If all appliances are not receiving the minimum inlet pressure the gas piping system may need to be chan...

Page 13: ...nnected to any heating system 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 s...

Page 14: ...a pressure meter on the inlet If this is not done local boiling will occur inside the water heater causing abnormal sounds and decreasing the durability of the heat exchanger Freeze Prevention Freezi...

Page 15: ...m If this water heater will be installed in an application where the supply water is hard the water must be treated with either the Noritz H2Flow or ScaleShield or a water softener Refer to the below...

Page 16: ...g pump 4 Connect the drain hose H2 to the circulating pump 5 Connect the drain hose H3 to the drain valve V4 6 Pour 2 gallon of and gallon water into the bucket Noritz recommends for flushing 7 Place...

Page 17: ...lushing solution through the water heater for 1 hour at a rate of 1 5 gallons per minute or more 5 The code C60 is displayed on the Remote Controller when the water heater detects the flow of the flus...

Page 18: ...t Covers 9 Open the gas supply valves and water outlet valves 10 Check for correct operation of the water heaters is displayed when the Main Water Heater s blue connector is connected is displayed whe...

Page 19: ...g ON OFF PROG ALARM OFF 120 F Temp CCC Error unit 01 Beep Beep Press ON ON ALARM OFF STOP OFF Display Example In case of Unit 1 s blue connector is connected System down is displayed when the all unit...

Page 20: ...cedure 3 1 3 5 7 Disconnect the blue connector marked FLUSH for flushing The Code CCC goes out on the Remote Controller 8 Close the Front Covers 9 Open the gas supply valves and water outlet valves 10...

Page 21: ...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...

Page 22: ...CE 1 2 PVC pipe DO NOT ADD ANY VALVES DO NOT ADD ANY VALVES Condensing Tankless Gas Water Heater Condensing Tankless Gas Water Heater Note If the drain line becomes clogged or frozen condensate will b...

Page 23: ...eywell Aquastat Model L6006A or L6006C Aquastat Wiring 3 Set the Aquastat to 10 F below the set output temperature An aquastat is the minimum pump control requirement in order to maintain the full rec...

Page 24: ...ly required by the water heater is 120VAC at 60 Hz The power consumption may be up to 410W or higher if using optional accessories Use an appropriate circuit Do not disconnect the power supply when no...

Page 25: ...oblems 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...

Page 26: ...cover 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 6 Press the ENTER Button and select eit...

Page 27: ...wall circuit to the pump 5 Replace the front cover Pump Wiring This feature is not available when using the Quick Connect Multi System feature Relay connection with pumps 1 Locate and prepare the pum...

Page 28: ...Cord 2 Caution For Quick Connect Multi System Installation use part QC 2 only sold separately Quick Connect Cord 2 Quick Connect Cord 2 tag A B 1 Red 2 Black 3 White 4 Green 5 Blue 6 Blue 1 Red 2 Bla...

Page 29: ...ar normal the burner may need to be cleaned by 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...

Page 30: ...rol manual valve clockwise to the off position Should overheating occur or the gas supply fail to shut off turn off the manual control valve to the appliance Handling after trial operation If the unit...

Page 31: ...TING 6 x 0 5 13mm 12 x 0 24 x 0 4 6 x 10mm OBLONG HOLE 6 x 0 5 13mm 12 x 0 24 x 0 4 6 x 10mm OBLONG HOLE 18 7 476mm 18 9 480mm 14 2 360mm 0 7 19mm 0 4 10mm 1 4 36mm 2 8 70mm 3 9 100mm 5 5 140mm 6 7 17...

Page 32: ...minutes of connecting electrical power before turning on the Power On Off Button press the or button on the remote controller and hold until the display blinks 99 If 99 does not blink on the remote c...

Page 33: ...s 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 pum...

Page 34: ...trol Wires use external relayV Unit 1 Set Yes for the question Start pump rotation in system settings See System controller unit Installation Manual When installing 2 pumps in parallel Set Yes for the...

Page 35: ...B Power PCB B5 B5 System Controller No 5 No 4 No 3 No 2 Remote Control terminal block Remote control terminal block Remote Controller Cord PCB Power PCB PCB Power PCB Multi System Wiring Use SC 301 6M...

Page 36: ...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 Unit 1 Unit 2 Unit 3 Unit 10 Unit 11 Unit 12 S...

Page 37: ...tem controller 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 wil...

Page 38: ...l pipe Hot water storage tank copper or stainless steel pipe Return line circulation pump Size for max flow Size for max flow Storage tank supply line copper or stainless steel pipe Storage tank retur...

Page 39: ...it 3 CAUTION The below diagram shows the connection of 3 units to the system controller When connecting 4 or more units follow the same procedure Connect the water heaters to the system controller fol...

Page 40: ...er In order to use this product safely read this installation manual carefully and follow the installation instructions Potential dangers from accidents during installation and use are described below...

Page 41: ...t The value in indicates the quantity Remote Controller Mounting bracket Raised countersunk head wood screw Wall anchor Raised countersunk head screw For junction box installation Machine screw When a...

Page 42: ...f the remote controller and the frame pull the entire decorative frame forward while pressing the sections indicated where the fingers are in the figure below If it does not come off insert a flat hea...

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