Tankless Rack System Installaon Manual
Additional information can be obtained from the appliance manual.
Free Standing Rack
(6 water heaters)
WARNING
— Do not store or use gasoline or other ammable 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 instrucons.
If you cannot reach your gas supplier, call the re department.
— Installaon and service must be performed by a licensed professional.
1 Rinnai Rack Installation
If the informaon in these instrucons is not followed exactly, a re or explosion
may result causing property damage, personal injury or death.
Notes
2 Rinnai Rack Installation
Table of Contents
Description ............................................................ 4
Venting Options ..................................................... 4
TRS Part Nos. and Main Components.................. 5
Specifications ................................................... 8-27
Clearances .......................................................... 28
Hoisting (Lifting Lugs) ......................................... 29
Securing Free Standing Racks ........................... 30
Securing Wall Mount Racks (ILW)……………….31
Securing Wall Hanging Racks (TRW)…………...32
Securing Wall Hanging Racks (TRC)…………….33
Relief Valve Piping .............................................. 34
Piping for Multiple Racks .................................... 34
Parallel Piping Drawing ....................................... 35
End Caps / Connections ..................................... 36
Condensate Drain ............................................... 37
Condensate Manifold .......................................... 37
Checklist for Plumbing ......................................... 38
Installation of Gas Supply .................................... 38
Connect Electricity ............................................... 39
Electrical (Pre-wired electrical assembly) ........... 40
TRW ST Series Dedicated Return Line
Plumbing Instructions……………………………...42
TRW ST Series Crossover Return
Conversion Instructions……………………………43
MSB Installation .................................................. 47
Final Checklist ..................................................... 49
TRW Replacement Parts ..................................... 50
TRC Replacement Parts…………………………..51
TRS Replacement Parts…………………………..52
Extended Limited Labor Warranty ....................... 54
Safety Symbols
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and
others.
DANGER
WARNING
CAUTION
Installaon
A licensed professional must install the (TRS) Tankless Rack System
The installer should have skills such as
connecng gas lines, water lines, valves, and electricity
knowledge of applicable naonal, state, and local codes
If you lack these skills, contact a licensed professional.
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe practices.
3 Rinnai Rack Installation
Descripon
Rinnai Tankless Rack Systems (TRS) include wall mounted and free standing conguraons. The wall mounted
rack systems are available for 2 or 3 water heaters. Free standing rack systems are available for 2, 3, 4, 5, or 6
water heaters.
The TRS can be ordered with Rinnai’s Common Venng System, which consists of the CVent exhaust venng and
PP or PVC intake venng. Up to eight tankless units can share the same CVent system.
The Rinnai TRS features design details that make installaon simple and straighorward.
• Maneuverability: Fits, fully assembled, through standard 32-inch doorways and on elevators
• Flexibility: Available in both wall-mount or freestanding design for indoor and outdoor installaons.
• Preassembled Gas and water manifolds are properly sized to maintain opmum performance.
• The racks are constructed of powder-coated aluminum, powder coated steel, and stainless to stand up to the
most demanding commercial environments, while minimizing weight.
• Oponal electronic controls to obtain turn down raos of up to 327:1 (Sold Separately).
NOTE: The TRS is designed to be used with Rinnai tankless water heaters only. Do not mount non-Rinnai water
heaters on the TRS.
Venng Opons
Venng Opons
Common Venng System ** PPtl, PPs
Concentric PPs PVC 5" 1 65’ 45’
Twin Pipe PVC/CPVC PVC/CPVC
Dual Pipe* PPs PPs or PVC 3" 1 41' 41
*This venng is provided by Centrotherm through their own distribuon network
Exhaust Vent
Material
Intake Vent
Material
PVC, PPtl,
PPS
PVC/CPVC
Diameter
8" 8 100' (with 7 units) or 41’ (with 8 units)
4” 1 100’ 65’
3” 1 65’ 41’
Max.
Units
Max. Vent Length
Natural Gas Propane
• Refer to the water heater installaon and operaon manual for specic details regarding vent installaon
opon and installaon.
• Venng components are packaged separately from the pre-assembled Rack for eld assembly of the vent
system by the contractor.
**Only the C199i is cered for both direct vent and exhaust only with room air (exhaust must terminate
vercally in room air applicaon) when installed in a commercial common vent applicaon only. Reference
Rinnai Common Vent (CVent) Manual for further informaon.
4 Rinnai Rack Installation
TRS Part Nos. and Main Components
Tankless Rack WALL HANGING
Part No.* Rack type Configuration Illustration
TRW02iN 2-unit interior wall hanging rack, NG
TRW02eN 2-unit exterior wall hanging rack, NG
TRW02iP 2-unit interior wall hanging rack, LP
TRW02eP 2-unit exterior wall hanging rack, LP
TRW23iN 2-unit interior wall hanging rack, NG
TRW23eN 2-unit exterior wall hanging rack, NG
TRW23iP 2-unit interior wall hanging rack, LP
TRW23eP 2-unit exterior wall hanging rack, LP
TRW03iN 3-unit interior wall hanging rack, NG
TRW03eN 3-unit exterior wall hanging rack, NG
TRW03iP 3-unit interior wall hanging rack, LP
TRW03eP 3-unit exterior wall hanging rack, LP
Tankless Rack WALL HANGING SE SERIES
Part No.* Rack type Configuration Illustration
TRW02SEiN 2-unit interior wall hanging rack, NG RUC
TRW02SEeN 2-unit exterior wall hanging rack, NG RUC
TRW02SEiP 2-unit interior wall hanging rack, LP RUC
TRW02SEeP 2-unit exterior wall hanging rack, LP RUC
Tankless Rack WALL HANGING ST SERIES
Part No.* Rack type Configuration Illustration
TRW02STiN 2-unit interior wall mount rack, NG
TRW02STeN 2-unit exterior wall mount rack, NG
TRW02STiP 2-unit interior wall mount rack, LP
TRW02STeP 2-unit exterior wall mount rack, LP
TRW03STiN 2-unit interior wall mount rack, NG
TRW03STeN 2-unit exterior wall mount rack, NG
TRW03STiP 2-unit interior wall mount rack, LP
TRW03STeP 2-unit exterior wall mount rack, LP
Part no. system: TR = tankless rack; W = wall hanging;S = stand alone; IL = inline; ILW = Inline Wall Mount; 2/3/4/5/6 = no. of water
heaters; i/e = interior/exterior; NG/LP = fuel type
5 Rinnai Rack Installation
TRS Part Nos. and Main Components
Tankless Rack CORNER HANGING
Part No.* Rack type Configuration Illustration
TRC02iN 2-unit interior corner hanging rack, NG
TRC02iP 2-unit interior corner hanging rack, LP
Tankless Rack INLINE WALL MOUNT
Part No.* Rack type Configuration Illustration
TRS02ILWiN 2-unit interior wall mount rack, NG
TRS02ILWeN 2-unit exterior wall mount rack, NG
TRS02ILWiP 2-unit interior wall mount rack, LP
TRS02ILWeP 2-unit exterior wall mount rack, LP
TRS23ILWiN 2-unit interior wall mount rack, NG
TRS23ILWeN 2-unit exterior wall mount rack, NG
TRS23ILWiP 2-unit interior wall mount rack, LP
TRS23ILWeP 2-unit exterior wall mount rack, LP
TRS03ILWiN 3-unit interior wall mount rack, NG
TRS03ILWeN 3-unit exterior wall mount rack, NG
TRS03ILWiP 3-unit interior wall mount rack, LP
TRS03ILWeP 3-unit exterior wall mount rack, LP
Part no. system: TR = tankless rack; W = wall hanging;S = stand alone; IL = inline; ILW = Inline Wall Mount; 2/3/4/5/6 = no. of water
heaters; i/e = interior/exterior; NG/LP = fuel type
6 Rinnai Rack Installation
TRS Part Nos. and Main Components
Tankless Rack FREESTANDING
Part No.* Rack type Configuration Illustration
TRS02iN 2-unit interior free standing rack, NG
TRS02eN 2-unit exterior free standing rack, NG
TRS02iP 2-unit interior free standing rack, LP
TRS02eP 2-unit exterior free standing rack, LP
TRS02ILiN 2-unit INLINE interior free standing rack, NG
TRS02ILeN 2-unit INLINE exterior free standing rack, NG
TRS02ILiP 2-unit INLINE interior free standing rack, LP
TRS02ILeP 2-unit INLINE exterior free standing rack, LP
TRS23ILiN 2-unit INLINE interior free standing rack, NG
TRS23ILeN 2-unit INLINE exterior free standing rack, NG
TRS23ILiP 2-unit INLINE interior free standing rack, LP
TRS23ILeP 2-unit INLINE exterior free standing rack, LP
TRS03ILiN 3-unit INLINE interior free standing rack, NG
TRS03ILeN 3-unit INLINE exterior free standing rack, NG
TRS03ILiP 3-unit INLINE interior free standing rack, LP
TRS03ILeP 3-unit INLINE exterior free standing rack, LP
TRS03iN 3-unit interior free standing rack, NG
TRS03eN 3-unit exterior free standing rack, NG
TRS03iP 3-unit interior free standing rack, LP
TRS03eP 3-unit exterior free standing rack, LP
TRS36iN 3-unit interior free standing rack, NG
TRS36eN 3-unit exterior free standing rack, NG
TRS36iP 3-unit interior free standing rack, LP
TRS36eP 3-unit exterior free standing rack, LP
TRS04iN 4-unit interior free standing rack, NG
TRS04eN 4-unit exterior free standing rack, NG
TRS04iP 4-unit interior free standing rack, LP
TRS04eP 4-unit exterior free standing rack, LP
TRS46iN 4-unit interior free standing rack, NG
TRS46eN 4-unit exterior free standing rack, NG
TRS46iP 4-unit interior free standing rack, LP
TRS46eP 4-unit exterior free standing rack, LP
TRS05iN 5-unit interior free standing rack, NG
TRS05eN 5-unit exterior free standing rack, NG
TRS05iP 5-unit interior free standing rack, LP
TRS05eP 5-unit exterior free standing rack, LP
TRS06iN 6-unit interior free standing rack, NG
TRS06eN 6-unit exterior free standing rack, NG
TRS06iP 6-unit interior free standing rack, LP
TRS06eP 6-unit exterior free standing rack, LP
Part no. system: TR = tankless rack; W = wall hanging; S = stand alone; IL = inline; ILW = Inline Wall Mount; 2/3/4/5/6 = no. of water
heaters; i/e = interior/exterior; NG/LP = fuel type
Back
to
Back
7 Rinnai Rack Installation
Specicaons
2 UNIT WALL HANGING FRAME
12.88 HOT (2‖COPPER)
7.88 COLD (2‖COPPER)
3.00 GAS (1-1/4‖NPT)
LEFT
7.76
56.82
FRONT
44.00
20.50
5.92 TYP.
BACK
TRW02
Configuration Illustration Model
36.00
BOTTOM
8 Rinnai Rack Installation
Specicaons
2 UNIT WALL HANGING FRAME
Model
Water Heater Model C199i (NG/LP) C199e (NG/LP)
Crate Dimensions (HxLxD) - in 66 x 67 x 35
Weight - Fully Assembled - lbs 166 165
Weight - Shipping (total) - lbs 380 379
Rack Frame - Specifications
TRW02i TRW02e
Frame Material
Frame Finish Powder Coat Stainless
Color Gray Stainless
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 8
Number of Tankless Water Heaters 2
Flow rate @ 70°F rise (gpm) 10.8
Flow rate @ 100°F rise (gpm) 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 398,000
14 Gauge Hot Rolled Steel 1.5‖ Square
Tube 16 Gauge Stainless Steel 1.5‖ Square Tube
BTU and Flow Rates for C199i, C199e (NG/LP)
TRW02
9 Rinnai Rack Installation
Specicaons
3 UNIT WALL HANGING FRAME
12.88 HOT (2‖COPPER)
7.88 COLD (2‖COPPER)
3.00 GAS (1-1/4‖NPT)
LEFT
7.76
56.82
FRONT
62.00
41.00
5.92 TYP.
54.50
BACK
BOTTOM
Configuration Model Illustration
TRW03
TRW23
10 Rinnai Rack Installation
Specicaons
3 UNIT WALL HANGING FRAME
Model TRW03i TRW03e TRW23i TRW23e
Water Heater Model C199i (NG/LP) C199e (NG/LP) C199i (NG/LP) C199e (NG/LP)
Crate Dimensions (HxLxD) - in 66 x 67 x 35 66 x 67 x 35
Weight - Fully Assembled - lbs 244 240 182 179
Weight - Shipping (total) - lbs 458 454 396 393
Rack Frame - Specifications
14 Gauge Hot Rolled
Frame Material
Frame Finish
Color
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 12 8
Number of Tankless Water Heaters 3 2
Steel 1.5‖ Square
Tube
Powder Coat Stainless Powder Coat Stainless
Gray Stainless Gray Stainless
BTU and Flow Rates for C199i, C199e (NG/LP)
16 Gauge
Stainless Steel
1.5‖ Square Tube
14 Gauge Hot
Rolled Steel 1.5‖
Square Tube
16 Gauge
Stainless Steel
1.5‖ Square Tube
Flow rate @ 70°F rise (gpm) 16.2 10.8
Flow rate @ 100°F rise (gpm) 11.4 7.6
Minimum input rate (Btuh) 15,200 15,200
Maximum input rate (Btuh) 597,000 398,000
TRW03
11 Rinnai Rack Installation
TRW23
Specicaons
2 UNIT WALL HANGING FRAME SE SERIES
12.88 HOT (2‖COPPER)
7.88 COLD (2‖COPPER)
3.00 GAS (1-1/4‖NPT)
LEFT
7.76
56.82
FRONT
44.00
20.50
5.92 TYP.
BACK
TRW02SE
Configuration Illustration Model
36.00
BOTTOM
12 Rinnai Rack Installation
Specicaons
2 UNIT WALL HANGING FRAME SE SERIES
Model
Water Heater Model RUC98i (NG/LP) RU98e (NG/LP)
Crate Dimensions (HxLxD) - in 66 X 67 X 35
Weight - Fully Assembled - lbs 166 165
Weight - Shipping (total) - lbs 380 379
Rack Frame - Specifications
TRW02SEi TRW02SEe
Frame Material
Frame Finish Powder Coat Stainless
Color Gray Stainless
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 8
Number of Tankless Water Heaters 2
Flow rate @ 70°F rise (gpm) 10.8
Flow rate @ 100°F rise (gpm) 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 398,000
14 Gauge Hot Rolled Steel 1.5‖ Square
Tube 16 Gauge Stainless Steel 1.5‖ Square Tube
BTU and Flow Rates for RUC98i, RU98e (NG/LP)
TRW02
13 Rinnai Rack Installation
Specicaons
2 UNIT WALL HANGING FRAME ST SERIES WITH THERMACIRC 360
LEFT
FRONT
BACK
BOTTOM
Configuration Illustration Model
TRW02ST
14 Rinnai Rack Installation
Specicaons
2 UNIT WALL HANGING FRAME ST SERIES WITH THERMACIRC 360
Model
Water Heater Model RUR98i AND RUC98i (NG/LP) RUR98e AND RU98e (NG/LP)
Crate Dimensions (HxLxD) - in 66X67X35
Weight - Fully Assembled - lbs 174 173
Weight - Shipping (total) - lbs 388 387
Rack Frame - Specifications
TRW02STi TRW02STe
Frame Material
Frame Finish Powder Coat Stainless
Color Gray Stainless
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 8
BTU and Flow Rates for RUR98i, RUR98e, RUC98i, RU98e (NG/LP)
Number of Tankless Water Heaters 2
Flow rate @ 70°F rise (gpm) 10.8
Flow rate @ 100°F rise (gpm) 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 398,000
14 Gauge Hot Rolled Steel 1.5‖ Square
Tube 16 Gauge Stainless Steel 1.5‖ Square Tube
TRW02
15 Rinnai Rack Installation
Specicaons
3 UNIT WALL HANGING FRAME ST SERIES WITH THERMACIRC 360
LEFT
FRONT
BOTTOM
BACK
Configuration Model Illustration
TRW03ST
16 Rinnai Rack Installation
Specicaons
3 UNIT WALL HANGING FRAME ST SERIES WITH THERMACIRC 360
Model TRW03STi TRW03STe
Water Heater Model RUR98i AND RUC98i (NG/LP) RUR98e AND RU98e (NG/LP)
Crate Dimensions (HxLxD) - in 66 x 67 x 35
Weight - Fully Assembled - lbs 252 248
Weight - Shipping (total) - lbs 466 462
Rack Frame - Specifications
Frame Material
Frame Finish
Color
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 12
BTU and Flow Rates for RUR98i, RUR98e, RUC98i, RU98e (NG/LP)
Number of Tankless Water Heaters 3 2
14 Gauge Hot Rolled Steel 1.5‖ Square
Tube
Powder Coat Stainless
Gray Stainless
16 Gauge Stainless Steel 1.5‖ Square
Tube
Flow rate @ 70°F rise (gpm) 16.2 10.8
Flow rate @ 100°F rise (gpm) 11.4 7.6
Minimum input rate (Btuh) 15,200 15,200
Maximum input rate (Btuh) 597,000 398,000
TRW03
17 Rinnai Rack Installation
Specicaons
2 UNIT CORNER HANGING FRAME
FRONT
TOP
Configuration Model Illustration
TRC02
18 Rinnai Rack Installation
Specicaons
2 UNIT CORNER HANGING FRAME
Model
Water Heater Model C199i (NG/LP)
Crate Dimensions (HxLxD) - in 31.5 x 48 x 50
Weight - Fully Assembled - lbs 220
Weight - Shipping (total) - lbs 350
Rack Frame - Specifications
Frame Material
Frame Finish Powder Coat
Color Gray
Water & Gas Connections
Hot Water Trunk Line Diameter 1-1/2"
Cold Water Trunk Line Diameter 1-1/2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 1-1/2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
14 Gauge Hot Rolled Steel 1.5‖ Square Tube
TRC02i
Maximum Current (Amperes) 8
BTU and Flow Rates for C199i, (NG/LP)
Number of Tankless Water Heaters 2
Flow rate @ 70°F rise (gpm) 10.8
Flow rate @ 100°F rise (gpm) 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 398,000
19 Rinnai Rack Installation
Specicaons
2 UNIT WALL MOUNT FRAME
LEFT
13.14
4.50 GAS (1-1/4‖NPT)
9.38 COLD (2‖COPPER)
14.38 HOT (2‖COPPER)
57.69
FRONT
44.00
20.50
34.53
5.92
TYP
BACK
1.00
27.44
2.00
38.53
TRW02
BOTTOM
Configuration Illustration Model
16.78 18.00
20 Rinnai Rack Installation
Specicaons
2 UNIT WALL MOUNT FRAME
Model
Water Heater Model
Crate Dimensions (HxLxD) - in 66 x 67 x 35
Weight - Fully Assembled - lbs 204
Weight - Shipping (total) - lbs 400
Rack Frame - Specifications
Frame Rail Type
Frame Material Aluminum (0.090 5052-H32)
Frame Finish
Color
Water & Gas Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Electric Requirements
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 8
TRS02ILW
C199i, C199e (NG/LP)
Sheet Metal
Powder Coat
Gray
BTU and Flow Rates for C199i, C199e (NG/LP)
Number of Tankless Water Heaters
Flow rate @ 70°F rise (gpm) 10.8
Flow rate @ 100°F rise (gpm) 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 398,000
2
TRS02ILW
21 Rinnai Rack Installation
Specicaons
3 UNIT WALL MOUNT FRAME
LEFT
13.17
4.50 GAS (1-1/4‖NPT)
9.38 COLD (2‖COPPER)
14.38 HOT (2‖COPPER)
57.69
FRONT
62.00
41.00
53.13
5.92
TYP
1.00
27.44
16.79 18.01
2.00
BACK
57.13
BOTTOM
Model Configuration Illustration
TRS03ILW
TRS23ILW
22 Rinnai Rack Installation
Specicaons
3 UNIT WALL MOUNT FRAME
Model TRS03ILW TRS23ILW
Water Heater Model C199i, C199e (NG/LP)
Crate Dimensions (HxLxD) - in 66 x 67 x 35
Weight - Fully Assembled - lbs 291 218
Weight - Shipping (total) - lbs 487 414
Rack Frame - Specifications
Frame Rail Type
Frame Material
Frame Finish
Color
Water, Gas, and Condensate Connections
Hot Water Trunk Line Diameter 2"
Cold Water Trunk Line Diameter 2"
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2" PIPE
Gas Trunk Line Diameter 1-1/4"
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Condensate Trunk Line Diameter 3/4‖ N/A
Condensate Trunk Line Material Sch–40 PVC N/A
Condensate Trunk Connection Type 3/4‖ Pipe N/A
Electric Requirements
Prewired Electrical Assembly Yes (Indoor Models Only) N/A
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 12 8
BTU and Flow Rates for C199i, C199e (NG/LP)
Aluminum (0.090 5052-H32)
Sheet Metal
Powder Coat
Gray
Number of Tankless Water Heaters 3 2
Flow rate @ 70°F rise (gpm) 16.2 10.8
Flow rate @ 100°F rise (gpm) 11.4 7.6
Minimum input rate (Btuh) 15,200 15,200
Maximum input rate (Btuh) 597,000 398,000
TRS03ILW
23 Rinnai Rack Installation
TRS23ILW
Specicaons
4 UNIT FREE STANDING FRAME
LEFT
44.00
20.50
34.53
5.92
TYP
56.82
FRONT
4.50 GAS (1-1/4‖NPT)
9.38 COLD (2‖COPPER)
14.38 HOT (2‖COPPER)
18.81
TRS04
TRS03
TRS02IL
TRS02
Configuration Illustration Model
Inline
(facing
same
direction)
Back
to
Back
26.29 28.59
BOTTOM
24 Rinnai Rack Installation
Specicaons
4 UNIT FREE STANDING FRAME
Model TRS04 TRS03 TRS02 TRS02IL
Water Heater Model
Crate Dimensions (HxLxD) - in 66 x 57 x 35
Weight - Fully Assembled - lbs 357 284 210 208
Weight - Shipping (total) - lbs 553 480 406 404
Rack Frame - Specifications
Frame Rail Type Sheet Metal
Frame Material Aluminum (0.090 5052-H32)
Frame Finish Powder Coat
Color Gray
Water & Gas Connections
Hot Water Trunk Line Diameter 2‖
Cold Water Trunk Line Diameter 2‖
Hot Water Trunk Line Material Rigid Copper
Cold Water Trunk Line Material Rigid Copper
Water Trunk Connection Type 2‖ PIPE
Gas Trunk Line Diameter 1-1/4‖
Gas Trunk Connection Type 1-1/4‖ MNPT
Gas Trunk Line Material Sch 40 Steel
Gas Trunk Branch Line Material PVC Over CSST
Condensate Trunk Line Diameter 3/4‖ N/A
Condensate Trunk Material Sch-40 PVC N/A
Condensate Trunk Connection Type 3/4‖ Pipe N/A
C199i, C199e (NG/LP)
Electric Requirements
Prewired Electrical Assembly
Voltage AC 120 Volts—60 Hz
Maximum Current (Amperes) 16 12 8
Yes (Indoor Models Only) N/A
BTU and Flow Rates for C199i, C199e (NG/LP)
Number of Tankless Water Heaters 4 3 2
Flow rate @ 70°F rise (gpm) 21.6 16.2 10.8
Flow rate @ 100°F rise (gpm) 15.2 11.4 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 796,000 597,000 398,000
TRS04
TRS03 TRS02
TRS02IL
25 Rinnai Rack Installation
Specicaons
6 UNIT FREE STANDING FRAME
57.69
LEFT
62.00
41.01
53.13
5.92
TYP
FRONT
18.81
9.38 COLD (2‖COPPER)
14.38 HOT (2‖COPPER)
4.50 GAS (1-1/4‖NPT)
26.29 28.59
BOTTOM
Configuration Model Illustration
TRS06
TRS05
TRS03IL
26 Rinnai Rack Installation
TRS06
TRS46
TRS23IL
Configuration Model Illustration
Specicaons
6 UNIT FREE STANDING FRAME
Model TRS06 TRS05 TRS46 TRS36 TRS03IL TRS23IL
Water Heater Model C199i, C199e (NG/LP)
Crate Dimensions (HxLxD) - in 66 x 67 x 35
Weight - Fully Assembled - lbs 526 452 378 284 284 210
Weight - Shipping (total) - lbs 722 649 576 480 480 406
Rack Frame - Specifications
Frame Rail Type
Frame Material
Frame Finish
Color
Water & Gas Connections
Hot Water Trunk Line Diameter
Cold Water Trunk Line Diameter
Hot Water Trunk Line Material
Cold Water Trunk Line Material
Water Trunk Connection Type
Gas Trunk Line Diameter
Gas Trunk Connection Type
Gas Trunk Line Material Sch 40 Steel
Gas Branch Line Material PVC Over CSST
Condensate Trunk Line Diameter 3/4‖ N/A
Aluminum (0.090 5052-H32)
2-1/2" 2‖
2-1/2" 2‖
2-1/2‖ PIPE 2‖ PIPE
1-1/2" 1-1/4‖
1-1/2‖ MNPT 1-1/4‖MNPT
Sheet Metal
Powder Coat
Gray
Rigid Copper
Rigid Copper
Condensate Trunk Line Material Sch-40 PVC N/A
Condensate Trunk Connection
Type
Electric Requirements
Prewired Electrical Assembly N/A Yes (Indoor Models Only)
Voltage AC 120 Volts—60 Hz
Max Current (Amperes) 24 20 16 12 12 8
BTU and Flow Rates for C199i, C199e (NG/LP)
Number of Tankless Water Heaters
Flow rate @ 70°F rise (gpm) 32.4 27.0 16.2 21.6 10.8
Flow rate @ 100°F rise (gpm) 22.8 19.0 11.4 15.1 7.6
Minimum input rate (Btuh) 15,200
Maximum input rate (Btuh) 1,194,000 995,000 597,000 796,000 398,000
6 5 3 4 2
3/4‖ Pipe
N/A
TRS06
27 Rinnai Rack Installation
TRS05
TRS03IL
TRS36
TRS46
TRS23IL
Clearances
Install the rack system so that the clearances shown below are followed.
Top
of Heater
Front
of Heater
Ground/Bottom
Side
of Heater
Indoor models: RUC98i, C199i, RUR98i
Top
of Heater
Front
of Heater
Ground/Bottom
Side
of Heater
Outdoor models: RU98e, C199e, RUR98e
Top of Heater
Back of Heater
Front of Heater
Sides of Heater
Ground/Bottom
Vent
* 0 inches from vent components and condensate
drain line.
The clearance for servicing is 24 inches in front of the
water heater.
For closet installation, clearance is 6 inches (152 mm
from the front.
to
Combustibles
inches (mm)
6 * (152) 2 *(51)
0 (zero) 0 (zero)
6 (152) 6 (152)
2 (51) 1/2 (13)
12 (305) 12 (305)
0 (zero) 0 (zero)
to Non-
Combustibles
inches (mm)
Top of Heater
Back of Heater
Front (panel)
Front (exhaust)
Sides of Heater
Ground/Bottom
The clearance for servicing is 24 inches in front of the
water heater.
to
Combustibles
inches (mm)
12 (305) 2 (51)
0 (zero) 0 (zero)
24 (610) 0 (zero)
24 (610) 24 (610)
6 (152) 1/8 (3.2)
12 (305) 2 (51)
to Non-
Combustibles
inches (mm)
28 Rinnai Rack Installation
Hoisng (Liing Lugs)
Lugs are installed on the top side of the following
racks for hoisting and moving. The lines or cables to
the lugs should be at a 90° angle. Use a spreader
lifting bar to hoist these racks.
Weights of the complete assemblies are available in
the Specifications section of this manual.
NOTE: DO NOT hoist the crate or palette.
MODELS AVAILABLE WITH LIFTING LUGS
TRS02ILW TRS02 TRS02IL TRS03
TRS03ILW TRS03IL TRS04 TRS05
Spreader Lifting Bar
90°
TRS06
TRS023ILW
TRS046
TRS036 TRS023IL
Hoisng (Straps)
For the TRW02 and TRW03 wall hanging racks, use hoisting straps looped around the top frame.
Weights of the complete assemblies are available in the Specifications section of this manual.
NOTE: DO NOT hoist the crate or palette.
TRW02
TRW023
TRW03
TRW02SE
Hoisting Straps
TRW03ST
TRW02ST
29 Rinnai Rack Installation
TRW03ST
28.50
26.50
53.09
0.563
(4) Plcs
55.11
26.50
28.50
36.53
34.51
0.563
(4) Plcs
Securing Free Standing Racks
All mechanical components shall be anchored and installed in accordance with naonal and/or local codes
having jurisdicon . Base holes to secure all free standing TRS are 0.563 inches in diameter. Reference local
codes regarding minimum concrete thickness and use appropriate expansion anchors that is capable of
supporng the TRS weight or where installaon is outdoor, anchors should be capable supporng the TRS
weight and wind shear. Reference and follow anchor manufacturer’s use and installaon requirements.
FREE STANDING MODELS AVAILABLE
TRS02 TRS02IL TRS03 TRS04 TRS36 TRS46 TRS23IL TRS03IL TRS05 TRS06
26.29
26.29
Boom view of
free standing
racks.
(Flex line illustraons
have been removed
for clarity)
30 Rinnai Rack Installation
Securing Wall Mount Racks (ILW)
WARNING
ANALYSIS OF THE WALL AND APPROPRIATE HANGING METHODS BEFORE ATTEMPTING TO HANG THE
TRS SYSTEM. FAILURE TO COMPLY WITH THE ABOVE REQUIREMENT COULD RESULT IN SUBSTANTIAL
PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR DEATH.
THE WALL MUST BE CABABLE OF CARRYING THE OPERATING WEIGHT OF THE
INSTALLED TRS SYSTEM. CONSULT A STRUCTURAL ENGINEER FOR STRUCTURAL
• Idenfy the installaon locaon and conrm that the installaon will meet all required clearances.
• The size and embedment specied are for anchors installed in stone or aggregate concrete only, for other
anchorage details the contractor or engineer on record for the building shall consult with a licensed structural
engineer for all anchorage of equipment not called out in this manual.
• In the event of a conict or inconsistency between items indicated in this manual regarding code requirements,
the more stringent standard shall prevail.
WALL RACK MODELS AVAILABLE
TRS02ILW, TRS03ILW, & TRS23ILW
• Using the holes in the wall bracket, Securely aach the rack to the wall. Ensure that the aachment strength is
sucient.
• Reference local codes regarding minimum concrete thickness and use appropriate expansion anchors that is
capable supporng the TRS weight .
TRS02ILW
TRS03ILW
TRS23ILW
(Brackets are located
on both sides of rack)
31 Rinnai Rack Installation
Securing Wall Hanging Racks (TRW)
WARNING
ANALYSIS OF THE WALL AND APPROPRIATE HANGING METHODS BEFORE ATTEMPTING TO HANG THE
TRS SYSTEM. FAILURE TO COMPLY WITH THE ABOVE REQUIREMENT COULD RESULT IN SUBSTANTIAL
PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR DEATH.
THE WALL MUST BE CABABLE OF CARRYING THE OPERATING WEIGHT OF THE
INSTALLED TRS SYSTEM. CONSULT A STRUCTURAL ENGINEER FOR STRUCTURAL
• Idenfy the installaon locaon and conrm that the installaon will meet all required clearances.
• In the event of a conict or inconsistency between items indicated in this manual regarding code requirements,
the more stringent standard shall prevail.
TRW02, TRW03, TRW23, TRW02SE, TRW02ST, TRW03ST
1. Using the holes in the wall hanging bracket, Securely
aach the bracket level to the wall. Ensure that the
aachment strength is sucient.
2. Li the wall hanging rack , and insert the top of the
frame into the bracket.
3. Secure the front of the bracket to the front of the wall
hanging frame with a #12 X 3/4 drill point screw.
32 Rinnai Rack Installation
Securing Wall Hanging Racks (TRC)
WARNING
ANALYSIS OF THE WALL AND APPROPRIATE HANGING METHODS BEFORE ATTEMPTING TO HANG THE
TRS SYSTEM. FAILURE TO COMPLY WITH THE ABOVE REQUIREMENT COULD RESULT IN SUBSTANTIAL
PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR DEATH.
THE WALL MUST BE CABABLE OF CARRYING THE OPERATING WEIGHT OF THE
INSTALLED TRS SYSTEM. CONSULT A STRUCTURAL ENGINEER FOR STRUCTURAL
• Idenfy the installaon locaon and conrm that the installaon will meet all required clearances.
• In the event of a conict or inconsistency between items indicated in this manual regarding code requirements,
the more stringent standard shall prevail.
TRC02
1. Using the holes in the wall hanging brackets, Secure-
ly aach the brackets level to the wall. Ensure that
the aachment strength is sucient. Brackets are to
be installed within 1/2” from the corner.
2. Li the corner hanging rack , and insert the top of
the frame into the two brackets.
3. Secure the frame to the hanging brackets using two,
12-14 Thread, 2-1/2” long, drill point screws (Supplied).
Fastener head is 5/16” hex.
33 Rinnai Rack Installation
Relief Valve Piping
Each Rinnai tankless water heater on the TRS comes installed with Isolaon valves and a pressure relief valve.
Refer to the installaon and operaon manual for more informaon on proper piping for the relief valve drain.
Pressure Relief
Valve
Isolation Valve
Piping for Mulple Racks
Mulple rack systems should be installed in parallel using a secondary manifold from the building cold and hot
water supply. Reference the drawing on the following page for guidance on plumbing mulple racks in a parallel
piping system.
A low pressure gas regulator must be installed prior to the rack system. Note the maximum cumulave input for
the system when sizing the gas regulator.
Use common plumbing pracce and reference all applicable codes when sizing the secondary manifolds and gas
regulator.
34 Rinnai Rack Installation
35 Rinnai Rack Installation
End Caps / Connecons
End caps are to be eld supplied and to be of the following materials:
• Cold water cap - Brass or Copper
• Hot water cap - Brass or Copper
• Gas cap - black iron
Once ow direcon and gas supply side is determined the other (opposite) side of the manifold must be capped.
See the example below.
Leak check the capped ends of the manifolds.
COLD IN
CAP
CAP
HOT OUT
CAP
GAS IN
36 Rinnai Rack Installation
Condensate Drain
Each Rinnai tankless water heater has a condensate
drain outlet on the boom of the unit. A drain line
must be connected to each water heater.
Freestanding rack systems with 3 or more units will
include a prefabricated condensate manifold. For all
other rack systems, a condensate drain manifold must
be eld fabricated (not shown in diagram)
Condensate piping shall be CPVC or PVC material and
shall not be smaller than the drain connecon on the
appliance.
Components of the condensate drainage shall be
CPVC or PVC material. All components shall be
selected for the pressure and temperature rang of
the installaon.
Where the drain pipes from more than one unit are
manifolded together for condensate drainage, the
pipe or tubing shall be sized in accordance with an
approved method as dictated by local codes.
Condensate Manifold
Condensate Manifolds are installed above the water
manifolds of the following racks for single point
condensate connection.
MODELS AVAILABLE WITH CONDENSATE
MANIFOLDS:
TRS03ILW TRS03IL TRS03 TRS04
TRS36 TRS46 TRS05
TRS06
Condensate must be disposed of according to local
codes.
Piping Diagram for Basic Installaon
Water
drain plug
Hot water
outlet
The condensate drain pipe (along its entire
length) must be at least the same diameter
as the drain line.
Gas
connection
Condensate
trap drain plug
Cold water
inlet
Condensate
drain line
Condensate
Manifold 3/4‖
Connection
Field Supplied PVC
Condensate drain must be sloped downward from the
rack system. Condensate must be disposed of per local
codes.
NOTICE
The telescoping fitting on the capped side of the
condensate manifold is for air relief. DO NOT
plug the opening.
37 Rinnai Rack Installation
Checklist for Plumbing
Installaon of Gas Supply
□ Purge the water line of all debris and air by
closing the hot isolaon valve and opening the
cold isolaon valve and its drain. Debris will
damage the water heater. Use a bucket or hose
if necessary.
□ Ensure that hot and cold water lines are not
crossed to the unit and are leak free.
□ Ensure that a pressure relief valve is installed with
a rang that exceeds the BTU input of the water
heater model. Refer to the rang plate on the
side of the water heater for BTU input.
□ Clean the inlet water lter by closing the cold and
hot water inlet isolaon (shut-o) valves. Put a
bucket under the lter at the boom of the water
heater to catch any water that is contained inside
the unit. Unscrew the water lter. Rinse the
lter to remove any debris. Install the lter and
open the isolaon valves.
□ Check for proper water pressure to the water
heater. Minimum water pressure is 50 psi. Rinnai
recommends 60-80 psi for maximum
performance.
□ Ensure any issues regarding water quality have
been properly addressed.
WARNING
1. A licensed professional must install the gas
supply.
2. Turn o 120v power supply.
3. Turn o the gas.
4. Gas is ammable. Do not smoke or provide other
ignion sources while working with gas.
5. Do not turn on the water heater or gas unl all
fumes are gone.
MUST DO
Check the type of gas and the gas inlet pressure
before connecng the water heater. If the water
heater is not of the gas type that the building is
supplied with, DO NOT connect the water heater.
Contact the dealer for the proper unit to match
the gas type.
Check the gas supply pressure immediately
upstream at a locaon provided by the gas
company. Supplied gas pressure must be within
the limits shown in the Specicaons secon of
this manual with all gas appliances operang.
Before placing the appliance in operaon, all joints
including the heater must be checked for gas
ghtness by means of leak detector soluon, soap
and water, or an equivalent nonammable
soluon, as applicable. (Since some leak test
soluons, including soap and water, may cause
corrosion or stress cracking, the piping shall be
rinsed with water aer tesng, unless it has been
determined that the leak test soluon is noncorrosive.)
Use approved connectors to connect the unit to
the gas line. Purge the gas line of any debris
before connecon to the water heater.
Any compound used on the threaded joint of the
gas piping shall be a type that resists the acon of
liqueed petroleum gas (propane / LPG).
The gas supply line shall be gas ght, sized, and so
installed as to provide a supply of gas sucient to
meet the maximum demand of the heater and all
other gas consuming appliances at the locaon
without loss of pressure.
INFORMATION
If in doubt about the size of the gas line, refer to
an approved pipe sizing chart
38 Rinnai Rack Installation
Connect Electricity
WARNING
Do not use an extension cord or an adapter plug with this appliance.
The water heater must be electrically grounded in accordance with local codes and ordinances or, in the
absence of local codes, in accordance with the Naonal Electrical Code, ANSI/NFPA No. 70.
Indoor water heaters are equipped with a three-prong (grounding) plug for your protecon against shock hazard
and should be plugged directly into a properly grounded three-prong receptacle. Do not cut or remove the
grounding terminal from this plug.
Do not rely on the gas or water piping to ground the water heater. A screw is provided in the juncon box for
the grounding connecon.
The water heater requires 120 VAC, 60 Hz power from a properly grounded circuit.
If using the 5 foot long power cord, plug it into a standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet.
On outdoor models, a disconnect switch must be provided and installed for the incoming 120 VAC power. It
should be a type that is suitable for outdoor use. Check the Naonal Electrical Code, ANSI/NFPA 70 and your
local codes for a proper switch type to use in your area.
The wiring diagram is located on the Technical Sheet aached to the inside of the front cover.
120V Wiring
Blue or Black wire: hot leg
Brown or White Wire: neutral
39 Rinnai Rack Installation
Electrical (Pre-wired electrical assembly)
Electrical Assemblies are installed on the middle rack
frame of the following indoor racks for single point
electrical connection.
IMPORTANT: Refer to the Specifications sections in
this manual for electrical requirements.
INTERIOR MODELS AVAILABLE WITH
ELECTRICAL ASSEMBLIES:
TRS03ILW TRS03IL TRS03 TRS04
TRS36 TRS46
TRS05 TRS06
4 Unit Electrical Assembly with (2)
20A, 125V, 2-Pole, 3 Wire
Grounding Receptacles.
6 Unit Electrical Assembly with
(3) 20A, 125V, 2-Pole, 3 Wire
Grounding Receptacles.
Conduit
Punch-out
Green
(Ground)
White
(Neutral)
Black
(Hot)
1. Locate gang box on side of TRS frame.
2. Remove the 2 screws securing front panel to gang
box.
3. Remove front panel.
4. Run building supplied electrical wiring and conduit
to gang box.
5. Connect building wiring to the 3 12AWG, THHN
wires, Hot (Black), Neutral (White), and Ground
WARNING
Shut off building supply power prior to connecting to
TRS electrical assembly. Failure to do so may result
in property damage, bodily harm, or death.
40 Rinnai Rack Installation
(Green).
6. Reinstall front panel to gang box using 2 screws.
Electrical (Pre-wired electrical assembly)
7. Once the building electrical power supply has been wired to the rack system, plug the indoor units into the
outlet located under the center rack frame as shown below.
IMPORTANT: The outlet is designed for use with Rinnai Tankless Water Heaters only. Do
not insert power cords belonging to other appliances or electrical sources into the outlet.
Outlet is designed for Rinnai
Tankless Water Heaters only.
NOTICE
DO NOT connect the tankless water heaters to the outlet located under the center rack prior to connecting
building power supply to the rack electrical gang box. Doing so may cause damage to the PC Boards of the
tankless water heaters.
41 Rinnai Rack Installation
TRW ST Series Dedicated Return Plumbing Instrucons
All TRW ST Series racks are set up for a dedicated recirculation return line. A single return line will connect to the
RUR98 unit above the cold isolation valve as shown in the below schematic. For the TRW03ST with multiple RUC98
units, the units must be connected using an EZconnect cable.
EZconnect cable
RUR98 RUC98
Dedicated return line connection
3/4‖ FNPT
Unscrew the square head threaded plug
to connect the building dedicated recirculation return line.
WARNING: Make sure the water supply
is off and the system is depressurized.
42 Rinnai Rack Installation
RUC98
TRW ST Series Crossover Return Conversion Instrucons
To use a crossover valve for recirculation, the PVA and check valve must be removed from the RUR98 unit and
replaced with a cold water flex line. A PVA must be added to the RUC98 units. For a TRW02ST, the cold line flex for
the RUR98 can be removed from the RUC unit. You will then remove the check valve from the flex line assembly from
the RUR98 and add it to the RUC unit. For applications with a TRW03ST, Kit 104000278 must be purchased to
add a PVA valve and threaded nipple to the second RUC unit.
For conversion to crossover recirculation, follow the steps below.
1. Remove the cold flex assembly from the RUR98 unit.
RUR98
Cold flex assembly
43 Rinnai Rack Installation
RUC98 RUC98
2. Remove the check valve and threaded nipple from the assembly and re-attach the flex line to the PVA valve.
Remove check valve
and threaded nipple
3. Remove the cold flex assembly from an RUC98 unit.
RUR98
Attach flex line to
PVA valve
RUC98 RUC98
4. Install the flex line assembly with the PVA from step 2 onto the RUC98 unit.
RUR98
RUC98 RUC98
Cold flex assembly
Flex line assembly
with PVA
44 Rinnai Rack Installation
5. Install the flex line assembly from step 3 onto the RUR98 unit.
RUR98
RUC98 RUC98
Flex line assembly
For TRW02ST racks, the conversion is now complete.
IMPORTANT: When conversion steps are complete, the water heater recirculation settings must be
adjusted. Refer to the ―Cross Over Mode‖ section in the ―Rinnai Direct Vent Tankless Water Heater
with Integrated Pump Installation and Operation Manual‖ (shipped with KBP water heater models) for
detailed instructions (Installation Instructions ► Recirculation Modes ► Cross Over Mode).
For TRW03ST racks, a PVA valve and threaded nipple (supplied in Kit 104000278)
must be added to the cold flex line assembly on the second RUC98. See the next step
for detailed instructions.
Threaded
Nipple
6. Remove the cold flex line from the second RUC98 unit.
RUR98
RUC98 RUC98
PVA
Valve
Cold Flex Line
45 Rinnai Rack Installation
7. Install the PVA valve and threaded nipple (supplied in Kit 104000278) to the cold water isolation valve:
• Install the threaded nipple to the cold water isolation valve.
• Install the PVA valve onto the threaded nipple.
Threaded nipple
PVA valve
8. Re-install the cold flex line.
9. Conversion steps are complete. Configure water heater settings as stated in the note below.
IMPORTANT:
When conversion steps are complete, the water heater recirculation settings must be adjusted. Refer to
the ―Cross Over Mode‖ section in the ―Rinnai Direct Vent Tankless Water Heater with Integrated Pump
Installation and Operation Manual‖ (shipped with KBP water heater models) for detailed instructions
(Installation Instructions ► Recirculation Modes ► Cross Over Mode).
46 Rinnai Rack Installation
MSB Installaon
All of the water heaters should be electronically connected using the MSB control system. The only excepon is when a water heater is dedicated to recovering a
tank. The MSB kits can electronically connect up to 25
water heaters.
When over 5 water heaters are connected together,
MSB-M units are connected using MSB-C2 kits.
If mulple MSB-M are used, then at least three water
heaters should be connected to each MSB-M. Example:
With 7 water heaters, one MSB-M should control 4 water heaters and the other MSB-M should control 3 water heaters.
The temperature seng for all of the connected water
heaters is controlled by the temperature controller
connected to the water heater with the master MSB
Board. Temperature controllers connected to the other
units will provide maintenance codes for their respecve units.
On applicable models a single MCC-91 can be connected to the master MSB Board to provide temperatures
greater than 140ºF for all the water heaters in the MSB
system.
In the diagram above, 25 water heaters are
electronically connected. Each bank of 5 is controlled
by an MSB-M control board. These boards are
connected to each other with MSB-C2 cables. One
MSB-M is the controlling or master MSB-M for the
enre system.
M MSB-M control board
A Connector cable A (part of MSB-M kit; replace
with MSB-C3 cables for V Series)
C1 MSB-C1 cable (9.8 feet) for connecting water
heaters within a banked system (up to 5), (use
MSB-C3 cables for V Series)
C2 MSB-C2 cable (26.2 feet) for connecting MSB-M
control boards (up to 5)
47 Rinnai Rack Installation
MSB Installaon
1. On the master MSB, one connector is connected to
the terminal connector and the other one is connected to the MSB Communicaon cable.
2. When 2 MSB boards are used a MSB Communicaon
cable will be installed between the master MSB board
and the second MSB. The open connector will have
the Terminal connector installed on both MSB boards.
Master MSB board
A maximum of 5 MSB boards can be connected to each
other. The terminal connector is connected on the
terminal MSB which has an open connector.
NOTE: When viewing the installed MSB board, the dip
switch will be as shown below (upside down).
3. Set No 3 switch on the master MSB to ON. The LED
light 6 should turn ON conrming the connecon.
4. Set No 4 switch on the second MSB to ON. The LED
light 6 should turn ON conrming the connecon.
5. Set No 3 and No 4 switches on the third MSB board to
ON. The LED light 6 should turn ON conrming the
connecon.
6. Set the No 5 switch on the fourth MSB board to ON.
The LED light 6 should turn ON conrming the
connecon.
2nd MSB board
2nd to 4th
MSB board
5th or Terminal
MSB board
7. Set No 3 and No 5 switches on the on the h MSB
board to ON. The LED light 6 should turn ON
conrming the connecon.
48 Rinnai Rack Installation
Final Checklist
□ The water heater is not subject to corrosive
compounds in the air.
□ The water supply does not contain chemicals or
exceed total hardness that will damage the heat
exchanger.
□ Clearances from the water heater unit are met.
□ Clearances from the vent termination / air intake
are met.
□ For indoor models, ensure you have used the
correct venting products for the model installed
and that you have completely followed the venting
manufacturer’s installation instructions and these
installation instructions.
□ For indoor models, verify that the vent system
does not exceed the maximum length for the
number of elbows used.
□ For indoor models, verify that SW 1 in DIPSW 1
has been adjusted for vent length if necessary.
Refer to the section on Maximum Vent Length.
□ Purge the water line of all debris and air by closing
the hot isolation valve and opening the cold
isolation valve and its drain. Debris will damage
the water heater. Use a bucket or hose if
necessary.
□ Ensure that hot and cold water lines are not
crossed to the unit and are leak free.
□ A manual gas control valve has been placed in the
gas line to the water heater.
□ Ensure that a pressure relief valve is installed with
a rating that exceeds the BTU input of the water
heater model. Refer to the rating plate on the side
of the water heater for BTU input.
□ Clean the inlet water filter by closing the cold and
hot water inlet isolation (shut-off) valves. Put a
bucket under the filter at the bottom of the water
heater to catch any water that is contained inside
the unit. Unscrew the water filter. Rinse the filter
to remove any debris. Install the filter and open
the isolation valves.
□ Check the gas lines and connections for leaks.
□ Confirm that the electricity is supplied from a 120
VAC, 60 Hz power source, is in a properly
grounded circuit, and turned on.
□ Verify the temperature controller is functioning
properly.
□ Verify that SW 2 and SW 3 in DIPSW 1 is set
correctly for your altitude.
□ Verify the system is functioning correctly by
connecting your manometer to the gas pressure
test port on the water heater. Operate all gas
appliances in the home or facility at high fire. The
inlet gas pressure at the water heater must not
drop below that listed on the rating plate.
□ DO NOT introduce toxic chemicals such as those
used for boiler water treatment to the potable
water used for space heating.
□ If the water heater is not needed for immediate
use, then drain the water from the heat exchanger.
□ Install the front panel.
□ Explain to the customer the importance of not
blocking the vent termination or air intake.
□ Explain to the customer the operation of the water
heater, safety guidelines, maintenance, and
warranty.
□ The installation must conform with local codes or,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installation Code, CSA
B149.1. If installed in a manufactured home, the
installation must conform with the Manufactured
Home Construction and Safety Standard, Title 24
CFR, Part 3280 and/or CAN/SCA Z240 MH
Series, Mobile Homes.
□ Inform the consumer if the isolation valves are not
installed or if a water softening system is not
installed.
□ Leave the entire manual taped to the water
heater (indoor models), temperature controller
(outdoor models), or give the entire manual
directly to the consumer.
□ Confirm that the gas inlet pressure is within limits.
□ Confirm that the water heater is rated for the gas
type supplied.
49 Rinnai Rack Installation
TRW REPLACEMENT PARTS
14
15
16
17
6/7/8/9
10/12
5
4
3
11/13
1
2
ALL TRW
REF. #
1 Dirt Leg
2 Gas Flex Line Assembly
3 Gas Valve
4 Hot Water Flex Line
5 Cold Water Flex Line
6 Cush Clamp 2.63ID
7 Cush Clamp 2.125ID
8 Cush Clamp 1.90ID
9 Cush Clamp 1.66ID
TRW03 / TRW03ST
10 Manifold, Gas - 3WM
11 Manifold, Water - 3WM
TRW02 / TRW02SE / TRW02ST
12 Manifold, Gas - 2WM
13 Manifold, Water - 2WM
TRW02ST / TRW03ST
14 Relocation Adapter
15 PVA Valve
16 Threaded Nipple
17 Check Valve
Description
5
14
1
2
6/7/8/9
15
3
10/12 11/13
16
4
17
50 Rinnai Rack Installation
TRC REPLACEMENT PARTS
1
4
5
10
9
5
3
5
2
1
TRC02
REF. #
1 Dirt Leg
2 Gas Flex Line Assembly
3 Gas Valve
4 18‖ Flex Line
5 21‖ Flex Line
6 Hot Water Manifold
7 Cold Water Manifold
8 Gas Manifold
9 Cush Clamp 1.66ID
10 Cush Clamp 1.625ID
Description
1
6
6
2
7
8
3
7
4
4/5
9/10
8
51 Rinnai Rack Installation
TRS REPLACEMENT PARTS
6
22/23
1
4
5
2
12
1
14/16/18/20
2
15/17/19/21
3
3
13
7/8/9/10/11
4
ALL TRS/TRSILW
REF. #
1 Dirt Leg
2 Gas Flex Line Assembly
3 Gas Valve
4 Hot Water Flex Line
5 Cold Water Flex Line
6 Wall Bracket
7 Cush Clamp 2.63ID
8 Cush Clamp 2.125ID
9 Cush Clamp 1.90ID
10 Cush Clamp 1.66ID
11 Cush Clamp 1.05ID
12 Frame, Rack Left Rear
13 Frame, Rack Right Rear
TRS05/TRS06/TRS36/TRS46
14 Manifold, Gas - 6B2B
15 Manifold, Water - 6B2B
TRS02/TRS03/TRS04
16 Manifold, Gas - 4B2B
17 Manifold, Water - 4B2B
TRS03IL/TRS03ILW/TRS23
18 Manifold, Gas - 3WM
19 Manifold, Water - 3WM
TRS02IL/TRS02ILW
20 Manifold, Gas - 2WM
21 Manifold, Water - 2WM
Description
TRS03/TRS03ILW/TRS03IL/
TRS04/TRS36/TRS46
22 Electrical - 4 Connections
5
7/8/9/10/11
6
14/16/18/20
52 Rinnai Rack Installation
15/17/19/21
12
13
23 Electrical - 6 Connections
22/23
TRS05/TRS06
TRS REPLACEMENT PARTS
CONDENSATE MANIFOLD
RACK DESCRIPTION
TRS03IL/ILW 3 Connections - In-Line
TRS03 3 Connections - 3B2B
TRS04 4 Connections - 4B2B
TRS05 5 Connections - 5B2B
TRS06 6 Connections - 6B2B
TRS36 3 Connections - 3B2B
TRS46 4 Connections - 4B2B
53 Rinnai Rack Installation
Extended Limited LABOR Warranty* Tankless Rack System
Rinnai is providing the opportunity to extend your Rinnai Standard Limited Warranty for labor only on the tankless water
heater product installed as part of the Tankless Rack System and used in a commercial applicaon. You must register the
product within 30 days of purchase of the system to qualify.
The limited warranty period on the Labor coverage for Tankless Water Heaters installed on the Tankless Rack System is extended for an addional 12 months (a total of 24 months labor coverage from date of purchase), when registered. Products
not registered will sll be covered under the Rinnai standard product limited warranty as provided in the Operang Instrucon manual which comes with the Tankless water heater. Warranty informaon is also available on Rinnai's web
site at www.rinnai.us. You can register at www.rinnairegistraon.com or by calling 1-866-RINNAI-1 (746-6241), except
registraon is not required in California and Quebec.
What is covered?
This Limited Warranty covers any defects in materials or workmanship when the product is installed and operated according
to Rinnai wrien installaon instrucons, subject to the terms within this Limited Warranty document. This Limited
Warranty applies only to products that are installed correctly. Improper installaon may void this Limited Warranty. In
order for this warranty to apply, it is required that you use a licensed professional who has aended a Rinnai installaon
training class before installing this water heater. This Limited Warranty extends to the original purchaser and subsequent
owners, but only while the product remains at the site of the original installaon. This Limited Warranty only extends
through the rst installaon of the product and terminates if the product is moved or reinstalled at a new locaon.
How long does coverage last?
REGISTRATION REQUIRED*
Item Period of Coverage (from date of purchase)
Tankless Water Heaters Refer to the Water Heater Installation and Operation Manual shipped with your system
for complete warranty details on your Rinnai Tankless Water Heater.
Rack and Components 1 year
Only applicable if product is registered within 30 days of purchase and the other condions are met. Note to California
and Quebec Residents, and residents of other jurisdicons that prohibit warranty benets condioned on registraon,
registraon is not required to obtain longer warranty periods and failure to register does not diminish your warranty
rights. www.rinnai.us/warranty
What will Rinnai do?
Rinnai will repair or replace the covered product or any part or component that is defecve in materials or workmanship as
set forth. Rinnai will pay reasonable labor charges associated with the repair or replacement of any part or component of
the tankless water heater. All repair parts must be genuine Rinnai parts. All repairs or replacements must be performed by
a licensed professional that is properly trained, state qualied or licensed to do the type of repair.
Replacement of the product may be authorized by Rinnai only. Rinnai does not authorize any person or company to assume
for it any obligaon or liability in connecon with the replacement of the product. If Rinnai determines that repair of a
product is not possible, Rinnai will replace the product with a comparable product at Rinnai’s discreon. The warranty claim
for product parts and labor may be denied if a component or product returned to Rinnai is found to be free of defects in
material or workmanship; damaged by improper installaon, use or operaon; or damaged during return shipping.
How do I get service?
You must contact a licensed professional for the repair of a product under this Limited Warranty. For the name of a licensed
professional please contact your place of purchase, visit the Rinnai website (www.rinnai.us), call Rinnai at 1-800-621-9419
or write to Rinnai at 103 Internaonal Drive, Peachtree City, Georgia 30269.
Proof of purchase is required to obtain warranty service. You may show proof of purchase with a dated sales receipt, or by
registering within 30 days of purchasing the product. To register your tankless water heater, please visit www.rinnai.us. For
those without internet access, please call 1-866-RINNAI1 (746-6241). Receipt of Registraon by Rinnai will constute proofof-purchase for this product. However, Registraon is not necessary in order to validate this Limited Warranty.
What is not covered?
54 Rinnai Rack Installation
This Limited Warranty does not cover any failures or operang dicules due to the following:
• accident, abuse, or misuse
• alteraon of the product or any component part
• misapplicaon of this product
• improper installaon (such as but not limited to)
Product being installed in a corrosive environment
condensate damage
improper venng
incorrect gas type
incorrect gas or water pressure
absence of a drain pan under the appliance
• water quality
• improper maintenance (such as but not limited to scale build-up, freeze damage, or vent blockage)
• incorrect sizing
• any other cause not due to defects in materials or workmanship
• Problems or damage due to res, ooding, electrical surges, freezing or any acts of God.
• force majeure
There is no warranty coverage on product installed in a closed loop applicaon, commonly associated with space heang
only applicaons.
The integrated controller on indoor models has a 1 year warranty on parts.
This Limited Warranty does not apply to any product whose serial number or manufacture date has been defaced. This
Limited Warranty does not cover any product used in an applicaon that uses chemically treated water such as a pool or
spa heater. This appliance is suitable for lling large or whirlpool bath tubs with potable water.
Limitaon on warranes
No one is authorized to make any other warranes on behalf of Rinnai America Corporaon. Except as expressly provided
herein, there are no other warranes, expressed or implied, including, but not limited to warranes of merchantability or
tness for a parcular purpose, which extend beyond the descripon of the warranty herein and further Rinnai shall not be
liable for indirect, incidental, special, consequenal or other similar damages that may arise, including lost prots, dama ge
to person or property, loss of use, inconvenience, or liability arising from improper installaon, service or use. Some states
do not allow the exclusion or limitaon of incidental or consequenal damages, so the above limitaon may not apply to
you.
Any implied warranes of merchantability and tness arising under state law are limited in duraon to the period of coverage provided by this Limited Warranty, unless the period provided by state law is less. Some states do not allow limitaons
on how long an implied Limited Warranty lasts, so the above limitaon may not apply to you.
This Limited Warranty gives you specic legal rights, and you may also have other rights which vary from state to state.
www.rinnai.us/warranty
55 Rinnai Rack Installation
A tradition of
true reliability.
For nearly 100 years, we at Rinnai have been ercely committed to delivering nothing less
than a superior experience at every touch point.
Beyond manufacturing the highest quality products, our people stand behind all that
we make—before, during and long after installation. From the 24/7/365 technical
supp o rt for pr ofes s iona ls, to our na tion a l ne t work of ind e pen d ent in sta l ler s , to on -st a ff
engineers who can assist with choosing the right products and sizes—we’re inspiring
condence right along with the comfort our solutions provide.
Learn more about Rinnai high-performance Tankless Water Heaters,
Hybrid Water Heating Systems, Boilers, Vent-Free Fan Convectors
and EnergySaver
®
Direct Vent Wall Furnaces at:
rinnai.us
Rinnai America Corporation • 103 International Drive, Peachtree City, GA 30269
1-800-621-9419 • rinnai.us
©2017 Rinnai America Corporation. Rinnai America Corporation continually updates materials, and as such,
ent is subject to change without notice. Local, state provincial, federal and national fuel gas codes must be adhered
cont
to prior to and upon installation.
100000294(11)
2/2017
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