Facilities Resource Group TTS-TWST2 User manual

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TTS-TWST-IM V1 06.22
TTS (Total Tankless Solution) Commercial Water Heating System
(Tankless with Storage Tank Series) Installation Manual
TTS-TWST6
6 Water Heater System

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TTS-TWST-IM V1 06.22
Table of Contents
Description..............................................................................................................................................................................3
Before Installation..................................................................................................................................................................3
Venting the TTS Rack System................................................................................................................................................. 9
Clearances.............................................................................................................................................................................19
TTS-TWST Commercial Water Heating System Parts Number & Main Components ........................................................23
TTS-TWST Specifications (System Dimensions)...................................................................................................................24
TTS-TWST Specifications (Parameters)................................................................................................................................25
Securing Floor Standing TTS-TWST Models.........................................................................................................................26
Freeze Prevention / Insulation ............................................................................................................................................27
Piping Connection Orientation (7 Total)..............................................................................................................................27
Condensate Drain to Floor or with Pump............................................................................................................................28
Water Treatment..................................................................................................................................................................30
Installation of Gas Supply ....................................................................................................................................................30
Electrical wiring ....................................................................................................................................................................31
Remote Controller................................................................................................................................................................32
Multi System Controller.......................................................................................................................................................33
Building Recirculation Pump Functions Overview….………………………………………………………………………………………………………37
Digital Controller Functions Overview……………….….………………………………………………………………………………………………………44
System Recirculation………………………………………………………………………………………………………………………………………………………56
System Pump….………………………………………..……………………………………………………………………………………………………………………57
Final checklist .......................................................................................................................................................................74
Trial Operation .....................................................................................................................................................................76
Warranty for Tankless Units & TTS System Components...................................................................................................78

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TTS-TWST-IM V1 06.22
Description
FRG’s TTS Series provides the most complete commercial water heater solution in the market. This tankless
water heating system provides up to 1.2 mil-lion BTU/h in the smallest footprint while having the advantage of
redundancy and equalizing heating performance.
The TTS-TWST provides a time and labor-saving solution when installing multiple Noritz tankless water heaters
combined with a storage tank to tackle any commercial demand.
OPC (One Point of Connection)
-Water, Power, Gas, Venting & Condensation Drain
Manifold systems
Hot Water Outlet, Cold Water Inlet, Gas, Condensate Drain, Building recirculation
Reduction in labor hours
Worry-free installation
Designed to fit through 3’-0” x 7’-0” Door
Pre-engineered system
Pre-configured control wiring
Pre-installed system controllers
Storage Tank Recovery Circulator
Integrated Check Valves
Additional accessories (included):
-Condensate Neutralizer (2x for TTS-TWST5/6 Models)
-Expansion Tank (Non-ASME)
o2.1 Gallon (TTS-TWST2/3/4 Models)
o4.5 Gallon (TTS-TWST5/6 Models)
Before Installation
•A licensed professional must install the TTS
•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.

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TTS-TWST-IM V1 06.22

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TTS-TWST-IM V1 06.22
Uncrating the TTS
[Moving the TTS Racks]
The rack is designed to be accessible from either of 2 directions. Refer to the following diagram for accessibility options
for moving the rack system.
Orientation
Pallet Jack
Forklift
Front/Back
Accessible
Accessible
Sides
Not Accessible
Accessible
Note Before unpacking the rack, verify that the product is physically free of damage
[TTS Crate Dimensions]
TTS-TWST2, 3, 4, 5, 6 Front View

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TTS-TWST-IM V1 06.22
TTS-TWST2 Side View
TTS-TWST3, 4 Side View
TTS-TWST5, 6 Side View

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TTS-TWST-IM V1 06.22
[Unpacking the TTS Rack]
1. Remove six (6) screws to remove the top panel of the TTS rack
2. Remove six (6) screws to remove the front panel
3. Remove four (4) screws to remove the left top retaining blocks
4. Remove four (4) screws to remove the left top retaining blocks
5. Remove one (1) screw from the top of the left side panel
6. Remove one (1) screw from the top of the right side panel
(View from Top)
7. Remove two (2) screws from the left bottom holding block
8. Remove two (2) screws from the right bottom holding block
9. Remove two (2) screws from the left cross block
10. Remove two (2) screws from the right cross block
3
3
4
4
6
5

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TTS-TWST-IM V1 06.22
(View from Top)
11. Slide the TTS rack forward to remove from crate
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9
8
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NORITZ America Corporation
Noritz America Corporation
11160 Grace Ave, Fountain Valley CA 92708, USA
Toll Free: (866) 7NORITZ (866-766-7489) Fax: [phone]
Website: www.noritz.com
TB081122 – Additional Polypropylene Venting
Options
This technical bulletin is to inform Noritz customers about changes to our venting options
and allowances for the following tankless water heater products:
EZ98DV (GQ-C2860WX-FF US)
EZ111DV (GQ-C3260WX-FF US)
NRCR92DV (GQ-C2660WXQ-FF US)
NRCR111DV (GQ-C3260WXQ-FF US)
NCC199CDV (GQ-C3260WZ-FF US)
Noritz is dedicated to providing solutions that make installing our tankless water heaters
as easy and flexible as possible. A summary of the changes as follows:
1. Added coverage for Duravent PolyPro®as an acceptable venting material
2. Compatible for common vent of up to 6 water heaters, with 3”, 4”, 6”, or 8” vent
pipe diameter and maximum equivalent vent length of 200’.
These changes are immediate and can be applied to any of the water heater models
listed. For questions or additional installation information, contact Noritz at (866) 766-
7489 or at www.noritz.com/
TB081522
Technical Bulletin

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TTS-TWST-IM V1 06.22
Venting the TTS Rack System
•Only vent materials approved for use with Category IV appliances shall be used.
•Under normal conditions, this water heating system will not produce exhaust flue temperatures in
excess of 149 °F (65 °C) and schedule 40 PVC pipe may be used as the vent material. If the system set
temperature is 160 °F (70 °C) or higher and there is a return line to the system from either a
recirculation pump or a storage tank, schedule 40/80 CPVC or PP must be used.
•This water heater must be vented with plastic pipe materials as specified in the table below. Vent
Installations in Canada which utilize plastic vent systems must comply with ULC S636.
*Only listed manufacture specified vent parts may be used for this Water Heater.
Refer to the manufacture’s literature for detailed information.
Note: Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-metallic
venting systems is prohibited.

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TTS-TWST-IM V1 06.22
•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 9 for additional details.
•All piping must be fully supported. Use pipe hangers at a minimum of 3 ft. (0.9m) or at the instructions
of the vent manufacuter. Do not use the Water Heater to support the venting.
•For additional installation procedures, refer to the Water Heater Installation Manual or contact Noritz
technical support [phone].
[How to tighten the vent pipe to the water heater]
1. Continue to insert the Vent Pipe until it touches the base of the Water Heater Exhuast (or Intake) Flue.
The vent pipe will be inserted approximately 2.3 in. (60mm).
2. Secure the Vent Pipe by tightening the band using a screwdriver.
The tightening torque shall be the following:
PVC: 16-20 in-lb
PP: 12-15 in-lb
When Venting Each Water Heater Individually
•These commercial water heating systems are designed to vented either individually or common vented (up
to 6 units per manifold).
•Follow all general venting guidelines as outlined in this manual and the appliance Installation Manual.
•The total vent length including horizontal and vertical vent runs should be no less than 3 ft (0.9m).
•The Water Heater can be adjusted to accommodate longer vent runs; refer to the Water Heater Installation
Manual (pg. 19) for additional details.
Maximum Vent Lengths (Individual Vent)
•The maximum vent length when using 2 in. (50 mm) pipe is 65 ft.

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TTS-TWST-IM V1 06.22
•The maximum vent length when using 3 in. (75mm) pipe is 150 ft.
•The maximum lengths are reduced by the number elbows used, as shown in the following table:
Acceptable Termination Types
The vent for each water heater may be terminated with any of the specialty terminations listed in the
table below. For full vent termination requirements, refer to the appliance Installation Manual.
Manufacturer
Part Number
Vent Diameter
Material
Noritz
PVT-HL
3”
PVC
Noritz
PVC-2CT
2”
PVC
Noritz
PVC-3CT
3”
PVC
Noritz
PVC-UCVK
2 or 3”
PVC
Noritz
PVC-2LPT
2”
PVC
Noritz
PVC-3LPT
3”
PVC
IPEX
196984
2”
PVC
IPEX
196985
3”
PVC
IPEX
196256
2” or 3”
PVC
Clearance Requirements Between Terminations (Horizontal)
When using 90 Elbows or Tee Fittings
•When venting individual units out the side of the building with separate intake and exhaust pipes,
maintain the exhaust pipes must be at least 1 ft (0.3m) above the intake pipes.
•Avoid locating the intake pipes directly below the exhaust pipe.
•The exhaust and intake must extend at least 3 in (75 mm) beyond the exterior of the building

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TTS-TWST-IM V1 06.22
When using Concentric Terminations
Using the PVC-2CT or PVC-3CT
•Multiple concentric terminations clearances should be grouped in pairs. One set shall be
terminated a maximum 4 in (100 mm) apart, with the next pair maintaining a minimum of 24 in
(0.6 m) spacing from the next pair.
•Refer to the Vent Termination Installation Manual for full clearance requirements.
Illustrations shown with PVC-3CT as a representative example
Side View
Interior View
≥3 in MIN
For both
Exhaust &
Intake
Exhaust
Exhaust
Exhaust
Intake
Intake
Intake

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TTS-TWST-IM V1 06.22
When using Concentric Terminations
Using the PVC-2LPT, PVC-3LPT, or PVC-UCVK
•Multiple concentric terminations must be a minimum of 12” (0.3m) between terminations
•Do not vertically align multiple terminations.

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TTS-TWST-IM V1 06.22
Clearance Requirements Between Multiple Terminations (Vertical)
When Using 90 Elbows or Tee Fittings
•Maintain at least 3 ft (0.9m) distance between the intake and exhaust of the appliance
•Maintain at least 1 ft (0.3m) distance between the exhausts of multiple units.

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TTS-TWST-IM V1 06.22
When Using Concentric Terminations
•For terminations at un-equal heights, maintain 24” (600 mm) minimum clearance.
•For terminations at equal heights, maintain a 24” (600 mm) minimum clearance.
Note: Drawings shown with optional PRC-1 accessory

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TTS-TWST-IM V1 06.22
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 TTS-TWST, refer to the Common Vent
Installation Manual.
Guidelines for Common Venting
•Do not reduce the vent diameter.
•Common vent must be installed with approved venting materials. Materials not specified in the
Manual are not acceptable.
•The unit Dip Switch Setting must be changed for each unit. (SW1 must be set to the ON position).
•Do not change Dip Switch 7 and 8 when Dip Switch 1 is ON (Common Vent Installation).
•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.
•Slope the horizontal vent ¼ in. (or 5/8 in when using PP pipe) upwards for every 12 in. toward the
termination
•Provide vertical support every 3' (0.9m) or as required by the vent pipe manufacturer's instructions.
•Ensure that the vent termination is at least 12 in. above ground, 12 in. above the highest anticipated
snow level, or as required by local codes, whichever is the greatest.
•[PVC /CPVC/PP 3”]
Do not reduce the trunk vent diameter for any unit connected to the Common Vent System. Reducing
the vent diameter may lead excessive condensation draining directly into the appliance.

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TTS-TWST-IM V1 06.22
Determining the Size of the Common Vent
•The minimum equivalent vent length is 3 ft.
•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 Common Vent Installation Manual or contact Noritz technical support at [phone].
Model
Configuration
No. of
Units
Table 1: Vent Diameter (in) and Maximum Equivalent Vent
Length (ft)
PVC or CPVC Schedule 40 pipe
PP Pipe
3”
4”
6”
8”
3”
4”
6”
8”
NCC199CDV
(GQ-C3260WZ-
FF US)
Both Direct Vent
(DV) and Non-
Direct Vent (SV)
2
18*
95*
200
18*
110*
200
3
N/A
39*
155*
200
N/A
45*
155*
200
4
N/A
N/A
90*
200
N/A
N/A
90*
200
5
N/A
N/A
50*
150*
N/A
N/A
50*
150*
6
N/A
N/A
35*
130*
N/A
N/A
35*
130*
*The BTU/h input of the unit may be reduced by up to 9%.
Note The sizing method shown in Table 1 is provided for the convenience of the installer. Maximum
acceptable vent system static pressure drop is 0.6 in. w.c.

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TTS-TWST-IM V1 06.22
Table 2: Equivalent Length of each Elbow (ft)
Diameter of Elbow
3”
4”
6”
8”
Length
5
12
18
20
Total Equivalent Vent Length (TL) = Straight Vent Length (L) + Equivalent Length of Elbows
•TL shall be less than the values listed in the Table 1 above.
•Count the number of elbows and multiply by the equivalent length of each elbow in accordance
with Table 2.
•Termination fitting (elbow or tee) is already accounted for and does not need to count.
•Entire branch section is already accounted for and does not need to be counted.
[Calculation Example]

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TTS-TWST-IM V1 06.22
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 Rack
3" (75mm)
3" (75mm)
Right Side of Rack
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