NCC199CDV Commercial Water Heating System Installation Manual

NCC199CDV Commercial Water Heating System Installation Manual -Additional information can be obtained from the appliance manual. Floor Mount Rack (CDV Units) 6 Water Heaters Floor Mount Rack (w/ VC-6) 4 Water Heaters 1

Table of Contents Table of Contents... 2 Safety Symbols... 3 Description... 5 Venting the NCC199CDV (GQ-C3259WZ-FF US)... 6 Clearances... 15 Commercial Water Heating System Parts Number & Main Components... 19 2 Unit Wall Mount Frame Specifications... 21 2 Unit Drawing Illustration / Dimensions... 22 3 Unit Wall Mount Frame Specifications... 23 3 Unit Drawing Illustration / Dimensions... 24 4 Unit Floor Mount Frame Specifications (4, 3, 2 Possible Configuration)... 25 4 Unit Drawing Illustration / Dimensions... 26 6 Unit Floor Mount Frame Specifications (6, 5, 3 Possible Configuration)... 27 6 Unit Drawing Illustration / Dimensions... 28 Hoisting and Lifting Lugs... 29 Securing Commercial Water Heating System Floor Mount... 30 Securing Commercial Water Heating System Wall Mount... 31 Relief Valve Piping... 32 Freeze Prevention / Insulation... 33 Rack Parallel Piping System... 34 End Caps Drawing Connections... 35 Condensate Drain to Floor or with Pump... 36 Water Treatment... 38 Checklist for plumbing... 39 Installation of Gas Supply... 40 Electrical wiring... 41 Remote Controller... 42 Multi System Controller... 43 Final checklist... 46 Trial Operation... 49 Replacement Parts Reference Numbers... 51 Warranty for Tankless Units & Commercial Water Heater System Components... 52 2

Safety Symbols 3

Installation A licensed professional must install the Commercial Water Heating System (CWHS). Installer should have skills such as connecting gas line, water line, electricity, and knowledge of applicable national state and local codes. Stop if you lack the skills above. Contact a licensed professional. 4

Description The Noritz Commercial Water Heating System (CWHS) is a pre-fabricated racking solution that can be used in flat rooftop, mechanical room, or outdoor applications. For the wall mounted configurations, Commercial Water Heating Systems are available in 2 or 3 Noritz tankless water heater configurations. The floor mount Commercial Water Heating Systems are available for 2, 3, 4, 5, or 6 Noritz tankless water heater configurations. For outdoor installation, vent caps (VC-6) must be ordered for each individual unit. The CWHS provides a time and labor saving solution when installing multiple Noritz tankless water heaters. Manufactured with highly corrosion-resistant aluminum that can withstand extreme environments. Both wall and floor mount designs are available for labor saving installations for indoor and outdoor unit types. All gas and water supplies are properly pre-sized for optimum performance. Remote controller and system controller are pre-installed for monitoring and controlling up to 6 units. Note: Condensate piping (pg. 36) and electrical wiring (pg. 41) are not included and must be field supplied. 5

Venting the NCC199CDV (GQ-C3259WZ-FF US) Under normal conditions, this appliance will not produce an exhaust flue temperature in excess of 149 F (65 C) and schedule 40 PVC pipe may be used as the vent material. If the water heater set temperature is 160 F (70 C) or higher and there is a return line to the water heater from either a recirculation pump or a combination space heating system, use schedule 40/80 CPVC or PP. Maximum vent length adjustment dipswitches may need to be adjusted to accommodate vent runs. Refer to the Water Heater Installation Manual Page 15 for additional details. For additional installation procedures, refer to the Water Heater Installation Manual or contact Noritz technical support (866) 766-7489. 6

Venting Options Exhaust Vent Material Intake Vent Material Diameter Maximum Vent Length (One 90 Elbow, not including termination) Direct Vent (DV) Single Vent (SV) PVC, CPVC, PP PVC, CPVC, PP Part: SV-CK-2 3" 93' 2 51 3" 93' 2" 51' Horizontal Individual Vent Termination Follow the requirements illustrated below. Slope the horizontal vent 1/4" upwards for every 12" (300mm) toward the termination. Use a condensation drain on the horizontal vent run if necessary. Make sure to insert the bird screen into the 90 elbow vertical setting (downward). Intake and exhaust should face the same direction and be located within the same pressure plane. Maintain a minimum 3 (0.9m) distance from the edge of the combustion air inlet and an inside corner. In the Commonwealth of Massachusetts, a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. For additional information on installation procedures, please refer to Water Heater Installation Manual (pg. 14-20) or contact Noritz technical support (866) 766-7489. * If combustion air will be drawn from the indoors, a room air conversion kit (SV-CK-2) must be installed on each unit. Refer to the Water Heater Installation manual for full installation requirements. Exterior View Exhaust Exhaust Exhaust Intake Intake Intake Interior View Side View 3 in MIN For both Exhaust & Intake 7

Vertical Individual Vent Termination Maintain a distance of 3 (0.9m) or wider between the intake and exhaust when installing the vent piping. Provide vertical support every 3' (0.9m) or as required by the vent pipe manufacturer's instructions. When using a horizontal section, slope the horizontal vent 1/4 upwards for every 12 (300mm) toward the termination to drain condensate. For additional information on proper installation procedures, please refer to the Water Heater Installation Manual (pg. 17) or contact Noritz technical support (866) 766-7489. * If combustion air will be drawn from the indoors, a room air conversion kit (SV-CK-2) must be installed on each unit. Refer to the Water Heater Installation manual for full installation requirements. Intake 3 MIN Exhaust Intake 3 MIN Exhaust 1 MIN Recommended Multiple Vent Terminations Intake 3 MIN Exhaust 1 MIN Recommended Isometric View of a Building Roof 8

Maximum Vent Lengths (Individual Vent) Pipe Diameter 2 (50mm) 3 (75mm) No. of Elbows Max Straight Vent Length* 8 N/A 60 (18.0m) 7 N/A 63 (18.9m) 6 12 (3.6m) 69 (20.7m) 5 18 (5.4m) 75 (22.5m) 4 27 (8.1m) 78 (23.4m) 3 36 (10.8m) 84 (25.2m) 2 42 (12.6m) 90 (27.0m) 1 51 (15.3m) 93 (27.9m) *Not including termination elbow. This termination elbow has already been factored in. Clearances PVC, CPVC and PP have been approved for use on this appliance with zero clearance to combustibles. 9

Horizontonal Concentric Terminations (Using PVC-CT2 or PVC-CT3 terminations) Multiple units must maintain either a maximum of 4 (100mm) horizontal distance or a minimum of 24 (600 mm) horizontal clearance between terminations (Figure B below). Refer to page 7 of the Concentric Vent Termination Installation Manual for full detail. For detailed installation procedures and maximum vent length dip switch adjustment, refer to the the PVC-CT(2/3) (PVC Concentric Vent) Installation Manual (pg. 19-20 Water Heater Installation Manual). The pipe shall be installed so that the first 3 (0.9 m) of pipe from the appliance flue outlet is readily accessible for visual inspection. Use a condensation drain on the horizontal section of the vent run if necessary. 10

Vertical Concentric (Using PVC-CT2 or PVC-CT3 termination Vertically) If installing vertical terminal using the PVC-CT(2/3) termination, a rain cap PRC-1* should be used. *Not approved for Canada. Maintain 12 (300 mm) minimum clearance above highest anticipated snow level, maximum of 24 (600 mm) above roof. Follow the illustrations below for separation between multiple vertical terminations. For installation and additional information procedures, please refer to the PVC-CT(2/3) Installation Manual. For terminations at un-equal heights, maintain 24 (600 mm) minimum clearance. 11

For terminations at equal heights, maintain a 24 (600 mm) minimum clearance. Outdoor Installations To utilize the CWHS outdoors, each unit must be installed with the outdoor vent cap (VC-6, purchased separately). Refer to the Outdoor Vent Cap (VC-6) Installation Manual for detailed installation instructions. VC-6 Outdoor Vent Cap 12

Common Venting the NCC199CDV The NCC199CDV is tested and approved to be common vented up to a maximum of 6 units on a single exhaust system. For full installation instruction on common venting the CWHS, refer to the Common Vent Installation Manual (CDVNRVK Manual). Guidelines for Common Venting Each unit on the common vent system must be installed with a non-return valve (CDVNRVK) on the exhaust vent. Common vent must be installed with approved venting materials. Materials not specified in the Manual are not acceptable. For Canadian Installations, only vent material approved to ULC-S636 may be utilized. When utilizing room air configurations, a room air conversion kit (SV-CK-2) must be installed on each unit. 13

Slope the horizontal vent 5/8" upwards for every 12" (300mm) toward the termination Provide vertical support every 3' (0.9m) or as required by the vent pipe manufacturer's instructions. CDVNRV (left) must be installed on each unit s vent. SV-CK-2 (right) must be installed on the intake of each unit s vent if utilizing room air. Determining the Size of the Common Vent Follow the table below for determining the maximum vent length and diameter of the common vent installation. For complete instructions on determining the appropriate sizing of the common vent installation, refer to the CDVNRVK Installation Manual or contact Noritz technical support at (866) 766-7489. 14

Clearances Install the rack system so that the clearances shown below are followed. Clearance Requirements for Both Combustibles and Non-Combustibles Indoor Outdoor (with vent cap) Top of Heater 12" (300mm) 36" (900mm) Left Side of Heater 3" (75mm) 3" (75mm) Right Side of Heater 3" (75mm) 3" (75mm) Front of Heater 4" (100mm) 24" (600mm) Vent Pipe 0" (0mm) N/A Minimum Indoor Clearance Requirements Minimum Outdoor Clearance Requirements 15

Recommended Clearance for Service and Maintenance when Common Venting When common venting the NCC199CDV, the following side clearances are recommended in order to facilitate service and repair of the CWHS system. 16

For direct and non-direct vent clearance requirements, refer to the chart below. 17

* The clearance requirements from vent terminations to building openings chart above apply to OD and SV converted units. 18

Commercial Water Heating System Parts Number & Main Components Commercial Water Heating System Wall Mount Model Number Rack Type Configuration Illustration CWHS501 2 Unit DV Wall Mount Rack, LP CWHS601 2 Unit DV Wall Mount Rack, NG CWHS502 3 Unit DV Wall Mount Rack, LP CWHS602 3 Unit DV Wall Mount Rack, NG 19

Commercial Water Heating System Floor Mount Model Number Rack Type Configuration Illustration CWHS503 2 Unit Back to Back DV Floor Mount, LP CWHS603 2 Unit Back to Back DV Floor Mount, NG CWHS504 2 Unit DV Floor Mount, LP CWHS604 2 Unit DV Floor Mount, NG CWHS505 3 Unit DV Floor Mount, LP CWHS605 3 Unit DV Floor Mount, NG CWHS506 4 Unit DV Floor Mount, LP CWHS606 4 Unit DV Floor Mount, NG CWHS507 3 Unit DV Floor Mount, LP CWHS607 3 Unit DV Floor Mount, NG CWHS508 5 Unit DV Floor Mount, LP CWHS608 5 Unit DV Floor Mount, NG CWHS509 6 Unit DV Floor Mount, LP CWHS609 6 Unit DV Floor Mount, NG 20

2 Unit Wall Mount Frame Specifications BTU and Flow Rates for NCC199CDV (GQ-C3259WZ-FF US) Number of Tankless Water Heaters 2 Max. Hot Water Capacity @ 30 F rise (GPM) 22.2 Max. Hot Water Capacity @ 70 F rise (GPM) 11.2 Minimum (Btuh) 18,000 Maximum (Btuh) 399,800 Model and Rack Specifications Model Number CWHS501 (LP) CWHS601 (NG) Tankless Water Heater Model NCC199CDV Frame Dimensions (in) 45.5 (L) x 15.0 (D) x 68.5 (H) Weight -Fully Assembled (lbs) TBD Shipping Weight -Fully Assembled (lbs) TBD Frame Material Aluminum Frame Color Aluminum Water & Gas Pipe Connections Hot Water Manifold Pipe Material Copper Cold Water Manifold Pipe Material Copper Gas Manifold Pipe Material Black Iron Condensate Drain Manifold Pipe Material (Recommended) Schedule 40 PVC Hot Water Manifold Pipe Diameter (in) 1 1/2 Cold Water Manifold Pipe Diameter (in) 1 1/2 Gas Manifold Pipe Diameter (in) 1-1/4 Electrical Requirements Voltage 120VAC (60 Hz) Maximum Current (Amps) 8 Note: Legs shown at bottom are for stabilizing during transport. If mounting on a wall, these legs can optionally be removed. 21

2 Unit Drawing Illustration / Dimensions <Front> <Right> <Bottom> *All Units are in inches 22

3 Unit Wall Mount Frame Specifications BTU and Flow Rates for NCC199CDV (GQ-C3259WZ-FF US) Number of Tankless Water Heaters 3 Max. Hot Water Capacity @ 30 F rise (GPM) 33.3 Max. Hot Water Capacity @ 70 F rise (GPM) 16.8 Minimum (Btuh) 18,000 Maximum (Btuh) 599,700 Model and Rack Specifications Model Number CWHS502 (LP), CWHS602 (NG) Tankless Water Heater Model NCC199CDV Rack Frame Dimensions (in) 70.0 (L) x 15.0(D) x 68.5 (H) Weight -Fully Assembled (lbs) TBD Shipping Weight -Fully Assembled (lbs) TBD Frame Material Aluminum Frame Color Aluminum Water & Gas Pipe Connections Hot Water Manifold Pipe Material Copper Cold Water Manifold Pipe Material Copper Gas Manifold Pipe Material Black Iron Condensate Drain Manifold Pipe Material (Recommended) Schedule 40 PVC Hot Water Manifold Pipe Diameter (in) 2 Cold Water Manifold Pipe Diameter (in) 2 Gas Manifold Pipe Diameter (in) 1-1/4 Electrical Requirements Voltage 120VAC (60 Hz) Maximum Current (Amps) 12 Note: Legs shown at bottom are used for stabilizing during transport. If mounting on a wall, these legs can optionally be removed. 23

3 Unit Drawing Illustration / Dimensions <Bottom> <Front> <Right> <Bottom> *All Units are in inches 24

4 Unit Floor Mount Frame Specifications (4, 3, 2 Possible Configuration) BTU and Flow Rates for NCC199CDV (GQ-C3259WZ-FF US) Number of Tankless Water Heaters 4 3 2 Max. Hot Water Capacity @ 30 F rise (GPM) 44.4 33.3 22.2 Max. Hot Water Capacity @ 70 F rise (GPM) 22.4 16.8 11.2 Minimum (Btuh) 18,000 18,000 18,000 Maximum (Btuh) 799,600 599,700 399,800 Model and Rack Specifications Model Number CWHS506 (LP) CWHS606 (NG) CWHS505 (LP) CWHS605 (NG) CWHS503 (LP) CWHS603 (NG) CWHS504 (LP) CWHS604 (NG) Tankless Water Heater Model NCC199CDV Rack Frame Dimensions (in) 45.5 (L) x 30.0 (D) x 68.5 (H) Weight -Fully Assembled (lbs) TBD TBD TBD Shipping Weight -Fully Assembled (lbs) TBD TBD TBD Frame Material Aluminum Frame Color Aluminum Water & Gas Pipe Connections Hot Water Manifold Pipe Material Copper Cold Water Manifold Pipe Material Copper Gas Manifold Pipe Material Black Iron Condensate Drain Manifold Pipe Material (Recommended) Schedule 40 PVC Hot Water Manifold Pipe Diameter (in) 2 Cold Water Manifold Pipe Diameter (in) 2 Gas Manifold Pipe Diameter (in) 1 1/4 Electrical Requirements Voltage 120VAC (60 Hz) Maximum Current (Amps) 16 12 8 <4 Units Back to Back> <3 Units Back to Back> <2 Units in Line> <2 Units Back to Back> 25

4 Unit Drawing Illustration / Dimensions <Front> <Right> <Bottom> *All Units are in inches 26

6 Unit Floor Mount Frame Specifications (6, 5, 3 Possible Configuration) BTU and Flow Rates for NCC199CDV(GQ-C3259WZ-FF US) Number of Tankless Water Heaters 6 5 3 Max. Hot Water Capacity @ 30 F rise (GPM) 66.6 55.5 33.3 Max. Hot Water Capacity @ 70 F rise (GPM) 33.6 28.0 16.8 Minimum (Btuh) 18,000 18,000 18,000 Maximum (Btuh) 1,199,400 999,500 599,700 Model and Rack Specifications Model Number CWHS509 (LP) CWHS609 (NG) CWHS508 (LP) CWHS608 (NG) CWHS507 (LP) CWHS607 (NG) Tankless Water Heater Model NCC199DV, NCC199OD (NG/LP) Rack Frame Dimensions (in) 70.0 (L) x 30.0 (D) x 68.5 (H) Weight Fully Assembled (lbs) TBD TBD TBD Shipping Weight Fully Assembled TBD TBD TBD Frame Material Aluminum Frame Color Aluminum Water & Gas Pipe Connections Hot Water Manifold Pipe Material Copper Cold Water Manifold Pipe Material Copper Gas Manifold Pipe Material Black Iron Condensate Drain Manifold Pipe Material (Recommended) Schedule 40 PVC Hot Water Manifold Pipe Diameter (in) 2 1/2 Cold Water Manifold Pipe Diameter (in) 2 1/2 Gas Manifold Pipe Diameter (in) 1 1/2 Electrical Requirements Voltage 120VAC (60 Hz) Maximum Current (Amps) 24 20 12 <6 Unit Back to Back> <5 Unit Back to Back> <3 Unit Inline> 27

6 Unit Drawing Illustration / Dimensions <Front> <Right> <Bottom> *All Units are in inches 28

Hoisting and Lifting Lugs The CWHS Floor Mount models come equipped with lifting lugs for hoisting, lifting, and moving. The hoisting cable lines to the lugs should be perpendicular at a 90 angle. It is recommended to use a spreader lifting bar for safety precaution. For total weight of the CWHS, refer to the specification section of this manual. Caution: Do not hoist the pallet or crate. Refer to the diagram below for all the possible hoisting models. CWHS503 (603) CWHS504 (604) CWHS505 (605) CWHS506 (606) CWHS507 (607) CWHS508 (608) CWHS509 (609) Lifting Lugs 29

Securing Floor Mounted CWHS Models All mechanical components shall be anchored and installed in accordance with national and local codes including anchorage to building structures. To secure all floor mount models, the base holes are 0.560(9/16 ) inches in diameter. For minimum concrete thickness, refer to local codes or consult with a licensed structural engineer regarding the use of appropriate expansion anchors capable of supporting the CWHS weight. The fully assembled weight is available in the specifications section of this manual. For outdoor installations, anchors shall be capable of supporting both the weight of the CWHS as well as wind shear loads. Refer to the diagram below for all the possible floor mount models. CWHS503 (603) CWHS504 (604) CWHS505 (605) CWHS106 (606) CWHS507 (607) CWHS508 (608) CWHS509 (609) Mounting locations Bottom view of free standing 4 units. Bottom view of free standing 6 units. 30

Securing Commercial Water Heating System Wall Mount Before mounting the CWHS to the wall, make sure the wall is capable of carrying the fully assembled weight of the CWHS. Consult a structural engineer for appropriate methods or structural analysis before attempting to wall mount the fully assembled CWHS. Failure to comply with the above requirements could result in substantial property damage, personal injuries or death. Identify the installation location and confirm that the installation will meet all required clearances. The base holes are for anchors installed in stone or aggregate concrete only. For other anchorage details, a contractor or engineer for the building shall consult with a licensed structural engineer for all anchorage of equipment not called out in the Commercial Water Heating System Manual. For minimum concrete thickness, refer to local codes or consult with a licensed structural engineer regarding the use of appropriate expansion anchors capable of supporting the CWHS weight. To secure all wall mount CWHS models, the base holes are 0.560 (9/16) inches in diameter. Confirm the use of approved anchors. Secure the Commercial Water Heating System to the wall and ensure it is capable of supporting it. Commercial Water Heating System Wall Mount Models CWHS501 (601) CWHS502 (602) Mounting locations 31

Relief Valve Piping Each Noritz tankless water heater on the CWHS comes installed with an isolation valve (IK-WV-200-1- TH-LF) and a pressure relief valve on the hot water outlet side. The pressure relief valve shall be operated once a year to ensure that it is functioning properly and there is no obstruction. Turn the power off to the unit before opening the relief valve, and make sure that water draining out of the valve will not cause any damage. If the relief valve discharges periodically, it may be due to thermal expansion in a closed water system. Contact the water supplier or a local plumbing inspector on how to correct this situation. Do not plug the relief valve. The relief valve must be installed such that the discharge will be conducted to a suitable place for disposal when relief occurs. Refer to the Water Heater installation manual for more information and proper piping for the relief valve drain. Isolation Valve with Safety Relief Kit Pressure Relief Valve Discharge Location 32

Freeze Prevention / Insulation In normal operation, freezing is prevented within the device automatically unless the outside temperature without wind is below -30 F (-35 C) for indoor installation or -4 F (-20 C) for outdoor installations. For models installed in an area where the outside temperature can approach freezing conditions of -30 F (-35 C) or outdoor -4 F (-20 C) or below, then additional protection measures must be used. For temporary freeze protection measures, refer to the Water Heater Owner s Guide. The built-in freeze prevention on the water heaters require power to function. When supplying combustion air from the indoors, the room temperature must be greater than 32 F (0 C) to prevent freezing and the room inside must not have negative pressure. The freeze prevention heaters will not prevent the plumbing external to the unit from freezing. Insulate or apply heating materials to both the cold water and the hot water supply piping to prevent freezing during cold weather and to prevent heat loss through the piping. 33

Rack Parallel Piping System Multiple Noritz CWHS can be installed in parallel connecting to the building cold and hot water supply. Reference the drawing below for guidance on plumbing. A low pressure gas regulator must be installed upstream of the CWHS gas supply such that the gas supply pressure is within the acceptable gas supply pressure range. The total input of all CWHS shall be used when sizing the gas regulator. Use common plumbing practice and reference all applicable codes when sizing the secondary manifolds and gas regulator. 34

Making Piping Connections Once water flow and gas supply direction is determined, the opposite end of the supply manifold must be capped and checked for leaks. End caps shall be field supplied and be of the following materials: Cold water line cap - Copper Hot water line cap - Copper Gas line cap - Black iron COLD IN CAP CAP HOT OUT CAP GAS IN <Front> 35

Condensate Drain to Floor or with Pump Each Noritz tankless water heater unit comes with a condensate drain outlet on the bottom of the unit which must be properly drained to ensure proper operation of this appliance. The ph level of the condensate is approximately 2-3. An external neutralizer must be installed on the drain piping prior to disposal when required by local code or when the condensate could cause damage. For condensate piping discharging to a floor drain, an airgap must be maintained. Refer to local plumbing code for minimum requirements. For long runs or where the drain is above the CWHS, a condensate pump may be required (field supplied). Size the pump to allow for a maximum condensate discharge of 2 GPH/unit (Ex. 6 units = 12GPH) from the water heater. NT-20A commerical condenstate neutralizer kit accessory (connect up to maximum of fifteen (15) condensing water heaters in a multi system). If using this accessory, materials (field supplied) for piping are required using minimum of 1 PVC pipe. The NT-20A will need to be discharged to an acceptable location. For long runs or with a drain above the CWHS, a condensate pump is needed, followed by pipes to the floor drain. Refer to NT-20A Installation Manual for full installation and usage instructions. * Note: The neutralizer is NOT included in the Commercial Water Heating System package. The optional neutralizer can be purchased separately (Noritz Part# NT-20A). The end of the drain pipe must not be submerged in water or blocked in any way. To ensure proper drainage, leave the end of the drain pipe open to the atmosphere. Also, make sure that there are no obstructions blocking the drain line from discharging condensate outlet. Be sure to check that condensate is freely flowing from the drain piping after the system has been installed. Condensate will begin flowing out of the CWHS within 15-20 minutes after operation has started. If the drain line becomes clogged or frozen, condensate water will flow back into the water heater and a "29" error code will flash on the remote controller, stopping the tankless water heater operation. If 36

this occurs, clear the clog or frozen water so that condensate can freely flow again. Apply freeze prevention measures (when necessary) to prevent the drain line from clogging or freezing. Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heaters, etc.) as illustrated below. If the water heater has been out of use for a long time make sure that you fill the condensate trap with water. This is to prevent dangerous exhaust gases from entering the building. Failure to fill the condensate trap could result in severe personal injury or death. * Do not use the condensate water, discharged from the drain pipe, for drinking purposes. Filling the Condensate Trap with Water (Indoor Installation) 1) Fill the condensate container by pouring approx. 10 oz.(280ml) 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 that condensate is coming out of the drain pipe. (During normal use of the water heater, condensate will begin to discharge from the drain pipe within 15 minutes of use. However, depending on the season and/or installation site conditions, it may take longer.) *Note: This procedure must be done on each unit installed on the system. 37

Water Treatment If the CWHS will be installed in an application where the supply water is hard, the water must be treated with either the Noritz H2Flow or a water softener. Refer to the below tables for suggested treatment and maintenance measures to be taken based on the water hardness level. Damage to the water heater as a result of water in excess of 12 gpg (200 mg/l) of hardness is not covered by the Noritz America Limited Warranty. Note: Water softeners may be regulated by the local water jurisdiction, consult with the manufacturer for code, sizing, and installation guidelines; the below diagram is for reference only. For more information about H2Flow, contact Noritz America at 866-766-7489. 38

Checklist for plumbing Read this Manual thoroughly prior to installation. Check that the rating plate indicates the correct gas type. (Natural Gas or Propane) If units are being installed at an elevation of 2000 ft. (610 m) or higher, a dip switch inside the unit needs to be adjusted. Please refer to the Water Heater Installation Manual for instructions on making this adjustment. Gas Piping Water Piping Do not reduce and use a smaller diameter than the Commercial Water Heating System gas inlet diameter. Install a gas shutoff valve on the supply line. Verify the inlet gas pressure is within range. Refer to Page. 38 of this manual for additional details. Ensure there are no gas leaks in the gas supply system. Check the inlet water pressure to the water heater. Noritz recommends 30-70 psi (207 to 491 kpa) to use the water heater comfortably. Install a check valve and a shut off valve near the incoming CWHS water inlet. Confirm that the hot and cold water lines are not crossed to the unit and are leak free. Debris in the cold water inlet will damage Noritz water heater. Purge the cold water inlet of all debris and air by closing the hot water isolation valve and opening the cold isolation valve and its drain. Use a bucket to catch the water or hose to avoid getting wet. Confirm that a pressure relief valve piping is installed. Confirm any issues regarding water quality have been addressed or treated. 39

Installation of Gas Supply 1. A licensed professional must install the gas supply. 2. Turn off and unplug the 120v power supply. 3. Turn off the gas and do not smoke or have other ignition sources while working on the gas. 4. Do not turn on Noritz tankless water heater or gas line until all fumes are gone. 5. Check the rating plate for correct gas type and gas inlet pressure before connecting to the water heater. 6. Before operating, all gas piping should be checked and tested by a leak detector or an equivalent nonflammable solution. 7. Purge the gas line of any debris before connecting to the water heater. 8. Do not reduce and use a smaller diameter than the CWHS gas inlet diameter. 9. To check for gas pressure setting and measuring gas pressure of the system please refer to the diagram below. 40

Electrical wiring The units on the CWHS are not pre-wired. Each water heater requires 120VAC, 60Hz power from a properly grounded circuit. For additional information please refer to the Water Heater Installation Manual and consult with a qualified electrician. If using a power cord, plug it into a standard 3 prong 120VAC 60Hz properly grounded wall outlet. If using a disconnect switch, it must be installed for the incoming 120VAC power. It should be a type suitable for outdoor use. Check your local codes for a proper switch type to use in your area. 41

Remote Controller The CWHS comes with a pre-wired remote controller (RC-9018M). The remote controller can be mounted adjacent to the CWHS or extended utilizing 18 AWG wire. Refer to the Water Heater Installation Manual for additional mounting instructions. Only one remote controller is connected to the Noritz tankless water heater to monitor and control all the units. If two or more remote controllers are connected a malfunction will occur. When power is first connected to the CWHS the remote enters an intial setting mode where you will be prompted to choose between a system type (Standard, Recirc., or Tank Recirc.). If Recirc is selected, properly set the recirculation system operation timer (Ex. 5:00am 8:00am). Refer to the RC -9018M (Remote Controller) Installation Manual for additional information such as system clock button (pg. 8), setting hot water temperature (pg. 10), locking (pg. 14), additional settings (pg. 15), and disabling recirculation operation (pg. 18). For additional information, refer to (SC-401-6M) Installation Manual for information such as remote initial setup (pg. 9), recirculation pump timer setup (pg. 13), system check button (pg. 15), maintenace monitors and additional settings (pg. 16). *The remote controller is not resistant to water, steam, chemcials, or UV rays. Store the remote in a location where it will not be exposed to these conditions. 42

Multi System Controller The CWHS comes pre-installed with a system controller for up to 6 units (SC-401-6M). Each Noritz tankless water heater will be electronically connected with the multi system controller. 43

44

The system controller is installed inside the front (manifold side) and leftmost unit. Every unit is numbered with a sticker located behind the unit in a counter clockwise direction (Refer to diagram below). 6 5 4 1 2 3 Refer to the system controller installation manual SC-401-6M (6 Unit System Controller) for additional multi system controller features such as warning and operation light pg. 20, circulation pumps pg. 21, exhaust fan, pressure switch pg. 22, and thermostat pg. 23. 45

Final checklist Before Installation Check that the rating plate indicates the correct gas type. (Natural Gas or Propane) If units are being installed at an elevation of 2000 ft. (610 m) or higher, a dip switch inside the unit will need to be adjusted. Refer to the Water Heater Installation Manual for instructions on making this adjustment. Venting Use only approved vent materials (PVC, CPVC, Approved Polypropylene). Clearance from exhaust and intake terminals are met. Maintain clearance to combustibles as required. Avoid installing elbow directly on top of unit. Horizontal Vent Termination Slope the horizontal vent ¼ upward every 12 toward termination. Use a condensation drain tee if necessary. Vertical Vent Termination Confirm clearances from the vent termination / air intake are met. Gas Piping Do not reduce and use a smaller diameter than the CWHS gas inlet diameter. Install a gas shutoff valve on the supply line and check connections for leaks. Confirm the gas inlet pressure is within range and is rated for the gas type. Ensure there are no gas leaks in the gas supply system. Water Piping Check the inlet water pressure to the water heater. Noritz recommends 30-70 psi (207 to 491 kpa) to use the water heater comfortably. Install a check valve and a shut off valve near the water inlet for easy access / future maintenance. Confirm that the hot and cold water lines are plumbed correctly and not crossed to the unit. 46

Verify all the end caps are capped and all the plumbing connections are leak free. Debris in the water line will damage Noritz water heater. Purge the cold water line of all debris and air by closing the hot isolation valve and opening the cold isolation valve and its drain. Confirm that a pressure relief valve piping is installed. Confirm that the water supply line does not contain chemicals and any issues regarding water quality have been addressed or treated. If the water heaters are not needed for immediate use, drain the water from the heat exchanger by following the procedure in the Water Heater Owner s Guide (pg. 33). Verify if the insulation for cold water inlet and hot water outlet are installed. Inform the client if they are not installed. Verify if the thermal expansion tank is installed in the cold water line and sized correctly. Condensate Drains Do not use steel, black iron, copper or any other material that can corrode when exposed to acidity. Leave the end of the drain pipe open to the atmosphere. Do not add a trap. Also make sure there are no obstructions blocking the drain line. Confirm the condensate trap for each unit is filled. Take measure to prevent the condensate drains from freezing. Use insulation, heat tape, electric heaters, etc. Electrical Wiring Confirm the electricity is supplied from a 120V A, 60Hz power source. Confirm it is properly grounded. After Installation Install the remote control inside a dry area. It is not water, chemical and UV ray proof. Explain to the client the importance of not blocking the vent termination or air intake. Open a hot water fixture and confirm there is a blue flame in the burner window and hot water is being produced at all fixtures. Using the remote controller, check the flow rate for any problems. Clean the filter in the cold water inlet and instruct cilent the process. 47

Install the front panel and explain to the client the operation of the water heater, safety guidelines, maintenance, and warranty. If relief valve piping or water treatment is not installed, inform the client. Leave the entire manual taped to the water heater (indoor models) or give them directly to the client. If the water heater does not function properly, call Noritz for assistance. *This checklist is not a replacement for thoroughly reading all the Commercial Water Heater System manual literature. 48

Trial Operation The installer should test operate the unit, followed by explaining to the customer how to use the unit, and give the owner this manual before leaving the installation site. Preparation steps. 1. Confirm the condensate trap is filled with approx. 10 oz. (280 ml) of water inside the exhaust (indoor installations). 2. Open a hot water fixture to confirm that water is available, and then close the fixture. 3. Open the gas supply valve. 4. Turn on the power supply. Using the remote controller, turn on the Power On / Off button (the Operation lamp will turn on). Operation steps. 1. Open a hot water fixture and confirm that the Burner On lamp on the remote controller lights on, and that hot water is being produced. (If necessary, repeat until the air in the gas piping is bled out). * White smoke may produce from the exhaust vent during cold weather. This is not a malfunction of the unit. * If an 11 error code appears on the remote controller, turn the unit off and then on 2-3 times. Followed by opening the hot water fixture again. 2. Change the temperature setting on the remote controller and check whether the water temperature changes. Check to see that the hot water temperature is the same as the temperature displayed on the remote controller. If multiple units do not ignite, switch which unit will ignite first by pressing the Max. or Min. Manifold Pressure Set Button on the circuit board. Unit 1 Ignites Unit 2 Doesn t Ignite Unit 3 Doesn t ignite (unless more water is being demanded). Unit 6 Doesn t ignite (unless more water is being demanded) Pressing the Max. or Min. Manifold Pressure Set Button on Unit 2 or 3, etc. Unit 1 Doesn t Ignite Unit 2 Ignites Unit 3 Doesn t ignite (unless more water is being demanded). Unit 6 Doesn t ignite (unless more water is being demanded) 49

If the water heater does not operate normally, refer to Troubleshooting in the Operation Manual. After the trial operation, clean the filter in the cold water inlet. Use the remote controller to see the status of how many units are igniting. Shutdown Steps. 1. Stop any water demand 2. Turn off electrical power. 3. Drain the water out of each unit to prevent freezing. 4. Clean the filter in the cold water inlet and instruct cilent the process. 50

Replacement Parts Reference Numbers No. Description 1 Gas Flex Line 5/6/7 8 9 14/15/16/17 4 10/11/12/13 3 1 2 18 2 Gas Valve 3 Hot Water Flex Line 4 Cold Water Flex Line 5 Cush Clamp for 2-1/2, 2, 1-1/4 or 1-1/2 Gas Pipe 6 Cush Clamp for 2 Water Pipe 7 Cush Clamp for 2.5 Water Pipe 8 Angle Brace 9 Four Hole Corner Brace 10 Water Manifold, 4 unit back to back 11 Water Manifold, 6 unit back to back 12 Water Manifold, 2 unit wall mount 13 Water Manifold, 3 unit wall mount 14 Gas Manifold, 4 unit back to back 15 Gas Manifold, 6 unit back to back 16 Gas Manifold, 2 unit wall mount 17 Gas Manifold, 3 unit wall mount 18 Dirt Leg Assembly 2 1 3 5/6/7 9 10/11/12/13 4 8 14/15/16/17 18 51

Warranty for Tankless Units & Commercial Water Heater System Components Warranty Registration Required * Warranty Period Period of Coverage (Date of Installation or 30 Days After Purchase) Labor Parts Heat Exchanger Tankless Water Heater 1 year 5 years 5 years Commercial Water Heater System Rack 1 year 52

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