Tankless Rack System
By Rinnai
Ojective of Rack System
Rinnai’s objective:
To supply a packaged water heater solution as fully assembled systems. The
system/kit would include all water/gas connections and manifolds under the
units. Installer mounts rack system with any necessary venting and connects his
utilities at which time the system is ready for operation
– Offerings to include;
•
In-Line or Wall Mount – 2 & 3 unit rack
•
Back to Back Mount; 2 – 4 or 3 - 6 unit rack
•
Rack systems can be combined in combinations up to 25 water
heaters.
2
Features & Benefits
Features and Benefits:
• Pre-assembled rack with water heaters installed
• Racks can be used with RU98 indoor/outdoor water heaters ONLY
• In-Line or Back to Back free standing options
• Gas and water manifolds properly sized for each rack system
• Rinnai MSB electronic control system available for linking up to 25 units
• MCC-91-2 commercial controller available for temperatures between 140˚F and
185˚F
3
Features & Benefits
Features and Benefits continue:
4
•
Flexible gas/water lines
•
Drain tees for gas sediment traps
•
Reinforced eyelets on back to back racks for lifting purposes
•
Marine grade powered coated aluminum racks
•
Fully assembled TRS (with water heaters) is designed to fit through a
standard 32 inch door
Back to Back Assembly
Actual 4 Unit Back to Back Rack Assembly
5
Integrated Manifold
Integrated Manifolds for both In-line and Back to Back Rack Systems
6
In-Line Frame Design
Top Frame
–
Uni-Strut Vertical legs /Sheet Metal bracing.
•
•
7
Center Frame
Uni-Strut – Galvanized Steel
Sheet Metal is 0.090” Aluminum w/powder coat
–
Frame uses (12) 5/16” threaded bolts to secure the top and center bracing.
–
Use up to #10 screws to mount to wall studs, 0.219” holes are 2” apart for ease of installation
Manifold Data
•
Manifold Kits
– Hot & Cold Water – Type “L” Copper
– Manifolds properly sized to handle maximum flow of system
– Universal manifold for hot /cold water lines
– Gas – Black Iron w/powder coat
•
Branch Lines
– CSST ¾” from water heaters to manifolds - all connections
– RIK kits include for hot/cold water feeds to manifold.
– ¾” manual shut off or service valve provided for each water heater
– ¾” CSST gas branch lines with yellow epoxy coating
8
Lifting Points
Proper lifting points for Rack Systems
Back to Back lifting requirements
In-Line lifting requirements - place straps
here
9
MSB System
REU-MSB Control System:
•
The MSB-M main board is supplied with (2) MSB-C1 cables, (one short & one long) to connect the
first two units up to the main MSB-M board.
•
Additional MSB-C1 cables will be needed to connect a third, forth or fifth unit to a MSB board. If
installing more than five units the combination of MSB-M boards plus C1 and C2 cables will be
determined on site based on the water heater configuration you choose.
•
Up to 5 MSB-M boards can be linked together with communication cables (MSB-C2’s) allowing up
to 25 water heaters to operate as a single system.
•
An MSB system could have an operating range from 10,000 BTU to as great as 5 million BTU’s in
terms of flow rate, from 0.4 gpm to 245 gpm.
•
When multiple water heaters are linked together with MSB controls, they will attempt to supply equal
amounts of hot water. They will also rotated occasionally to ensure equal usage among the entire
system.
•
On initial water flow 1 to 3 units will fire up based on the dip switch configuration of the Main MSB
board. Once the flow rate is determined, the MSB board will cycle additional units on or off as
needed. Water heaters not firing will close their servo valves.
10
MSB System
MSB Control System continue
•
The temperature setting for all water heaters in a manifold system are controlled by the primary unit
connected to the Main MSB board. The temperature controllers connected to other units will display
the set temperature selected on the primary unit and cannot be adjusted individually. Additionally
they will display error codes and can be used for diagnostics for that particular unit.
•
If a water temperature over 140 ˚F is desired, the MCC-91-2 controller must be installed on the water
heater with the Main MSB board.
•
Dip switches on the MSB-2M board determine the number of units in standby. It is recommended
that the Main MSB-M board dip switches are set for three units to be in the standby mode. All other
MSB-M boards should be set to one unit in standby. Place dip switch #1 and #2 on the Main MSB-M
board to the “OFF” position, this will place three units in the standby mode. Place dip switch #1 & #2
to the other MSB-M boards to the “ON” position. That will place one unit in those banks in the
standby mode. The system will always allow three units to be in standby, as long as the Main MSB-M
board is set to three units as explained above.
•
11
MSB System
MSB Control System (continued)
All MSB boards must be set up to communicate with the other boards. This is achieved by setting
the dip switches on the MSB boards to the proper positions, follow steps a – e below:
a. Set dip switch #3 on the Main MSB
board to the “ON” position.
b. Set dip switch #4 on the second MSB
board to the “ON” position.
LED #6
c. Set dip switch #3 & #4 on the third MSB
board to the “ON” position.
d. Set dip switch #5 on the fourth MSB
board to the “ON” position.
e. Set dip switch #3 & #5 on the fifth MSB
board to the “ON” position
12
Dip switches
In all steps, LED #6 will light to
confirm connection.
TRW02 Specifications
In-Line TRW02 Specifications
1
In-Line TRW02
NO.
DESCRIPTION
QTY.
1
Frame, Top
1
2
Frame, Bottom
1
3
Rinnai Tankless Indoor or Outdoor Unit
2
4
Manifold, Cold Water
1
5
Manifold, Hot Water
1
6
Manifold Gas
1
7
3/4” Dirt Leg
2
8
P1000 Unistrut Channel
2
9
3/4 FNPT Brass Ball Valve - Gas
2
Water and gas flex lines are included on all rack
systems.
3
2
8
7
4
5
6
9
13
TRW02 Dimensions
In-Line TRW02 Dimensions
14
TRW03 Specifications
In-Line TRW03 Specifications
In-Line TRW03
1
NO.
DESCRIPTION
QTY.
1
Frame, Top
1
2
Frame, Bottom
1
3
Rinnai Tankless Indoor or
Outdoor Unit
3
4
Manifold, Cold Water
1
5
Manifold, Hot Water
1
6
Manifold, Gas
1
7
3/4” Dirt Leg
3
8
P1000 Unistrut Channel
2
9
3/4 FNPT Brass Ball Valve Gas
3
3
2
8
7
4
5
6
Water and gas flex lines are included on
all rack systems.
9
15
TRW03 Dimensions
In-Line TRW03 Dimensions
16
TRR04 Specifications
Back to Back TRS04 Specification
2
1
Back to Back TRS04
NO.
DESCRIPTION
QTY.
1
Frame
1
2
Lifting Eyebolt
2
3
Rinnai Tankless Indoor or
Outdoor Unit
4
4
Manifold, Cold Water
1
5
Manifold, Hot Water
1
6
Manifold, Gas
1
7
3/4” Dirt Leg
4
8
Unistrut
2
9
3/4 FNPT Brass Ball Valve - Gas
4
3
8
Water and gas flex lines are included on all
rack systems.
4
5
6
7
9
17
TRS04 Dimensions
Back to Back TRS04 Dimensions
18
TRS06 Specifications
Back to Back TRS06 Specification
Back to Back TRS06
NO.
DESCRIPTION
QTY.
1
Frame
1
2
Lifting Eyebolt
2
3
Rinnai Tankless Indoor
or Outdoor Unit
6
4
Manifold, Cold Water
1
5
Manifold, Hot Water
1
6
Manifold, Gas
1
7
3/4” Dirt Leg
6
8
Unistrut
2
9
3/4 FNPT Brass Ball
Valve - Gas
6
Water and gas flex lines are included on all
rack systems.
19
TRS06 Dimensions
Back to Back TRS06 Dimensions
20
Rack System Examples
Back to Back Application
In-Line Application
21
Rack System Examples
Back to Back Application
22
Rack System Examples
Back to Back Application
23
Clearances for Water Heaters
Install the rack system per clearances shown below for the RU98i and RU98e water heaters
to top
to top
to front
to front
to side
to side
to floor/ground
to floor/ground
Indoor models: RU98i
24
Outdoor models: RU98e
to
Combustibles
to NonCombustibles
to
Combustibles
to NonCombustibles
inches (mm)
inches (mm)
inches (mm)
inches (mm)
Top of Heater
6 * (152)
2 *(51)
Top of Heater
12 (305)
2 (51)
Back of Heater
0 (zero)
0 (zero)
Back of Heater
0 (zero)
0 (zero)
Front of
Heater
6 (152)
6 (152)
Front (panel)
24 (610)
0 (zero)
Sides of
Heater
2 (51)
1/2 (13)
24 (610)
24 (610)
Ground/Botto
m
12 (305)
12 (305)
6 (152)
1/8 (3.2)
Vent
0 (zero)
0 (zero)
12 (305)
2 (51)
Front (exhaust)
Sides of Heater
Ground/Bottom
Piping Layout - 24 Units
Manifold Design for 24 W/H’s
2 ½”, 4” and 6” Water Manifolds/Connections
Multiple rack systems MUST pipe in parallel as shown below.
Piping systems in series will result in undersized water/gas lines.
25
Detailed Piping - 24 Units
26
Rack System Kit Components
Tankless Rack System Kit Components
27
Part No.*
Rack type
Rack P/N
TRW02iN
2-unit interior In-line rack, NG
RW2
TRW02eN
2-unit exterior In-line rack, NG
RW2
TRW02iP
2-unit interior In-line rack, LP
RW2
TRW02eP
2-unit exterior In-line rack, LP
RW2
TRW03iN
3-unit interior In-line rack, NG
RW3
TRW03eN
3-unit exterior In-line rack, NG
RW3
TRW03iP
3-unit interior In-line rack, LP
RW3
TRW03eP
3-unit exterior In-line rack, LP
RW3
Configuration
Rack System Kit Components
Tankless Rack System Kit Components
28
TRS02iN
2-unit interior back to back rack, NG
RS4
TRS02eN
2-unit exterior back to back rack, NG
RS4
TRS02iP
2-unit interior back to back rack, LP
RS4
TRS02eP
2-unit exterior back to back rack, LP
RS4
TRS02iN-IL
2-unit INLINE interior back to back rack, NG
RS4
TRS02eN-IL
2-unit INLINE exterior back to back rack, NG
RS4
TRS02iP-IL
2-unit INLINE interior back to back rack, LP
RS4
TRS02eP-IL
2-unit INLINE exterior back to back rack, LP
RS4
TRS03iN
3-unit interior back to back rack, NG
RS4
TRS03eN
3-unit exterior back to back rack, NG
RS4
TRS03iP
3-unit interior back to back rack, LP
RS4
TRS03eP
3-unit exterior back to back rack, LP
RS4
TRS04iN
4-unit interior back to back rack, NG
RS4
TRS04eN
4-unit exterior back to back rack, NG
RS4
TRS04iP
4-unit interior back to back rack, LP
RS4
TRS04eP
4-unit exterior back to back rack, LP
RS4
Rack System Kit Components
Tankless Rack System Kit Components
29
TRS03iN-IL
3-unit INLINE interior back to back rack, NG
RS6
TRS03eN-IL
3-unit INLINE exterior back to back rack, NG
RS6
TRS03iP-IL
3-unit INLINE interior back to back, LP
RS6
TRS03eP-IL
3-unit INLINE exterior back to back rack, LP
RS6
TRS05iN
5-unit interior back to back rack, NG
RS6
TRS05eN
5-unit exterior back to back rack, NG
RS6
TRS05iP
5-unit interior back to back rack, LP
RS6
TRS05eP
5-unit exterior back to back rack, LP
RS6
TRS06iN
6-unit interior back to back rack, NG
RS6
TRS06eN
6-unit exterior back to back rack, NG
RS6
TRS06iP
6-unit interior back to back rack, LP
RS6
TRS06eP
6-unit exterior back to back rack, LP
RS6
Material Details
Material Detail List
Description
(2) RU98
In-Line Mount
(3) RU98
In-Line Mount
Top Level Part No.
RW2
RW3
Rack Frame - Specifications
RW2
RW3
Water Heater Model Number
RU98i/eN/P
RU98i/eN/P
Height - in
54.81
54.81
Length - in
41.50
62.00
Depth - in
12.75
12.75
62 x 55 x 36
62 x 75 x 36
Weight - Assembly w/o WHs - lbs
44.1
63.4
Weight - Water Heaters - lbs
131.4
197.1
Weight - Fully Assembled - lbs
175.5
260.5
Weight - Packaging - lbs
121.0
142.0
Weight - Shipping (total) - lbs
296.5
402.5
Crate Dimensions (LxWxH) - in
30
Material Details
Material Detail List
Description
(4/4) RU98
Back to Back
(3/4) RU98
Back to Back
(2/4) RU98
Back to Back
Top Level Part No.
RS4-4
RS4-3
RS4-2
Rack Frame - Specifications
RF4
RF4
RF4
Water Heater Model Number
RU98i/eN/P
RU98i/eN/P
RU98i/eN/P
Frame (HxLxD) - in
55.56 x 41.50 x 28.5
Crate Dimensions (HxLxD) - in
31
62 x 55 x 36
Weight - Assembly w/o WHs - lbs
96.1
88.1
80.1
Weight - Water Heaters - lbs
262.8
197.1
131.4
Weight - Fully Assembled - lbs
358.9
285.2
211.5
Weight - Packaging - lbs
129.0
129.0
129.0
Weight - Shipping (total) - lbs
487.9
414.2
340.5
Material Details
Material Detail List
Description
(6/6) RU98
Back to Back
(5/6) RU98
Back to Back
(3/6) RU98
Back to Back
Top Level Part No.
RS6-6
RS6-5
RS6-3
Rack Frame - Specifications
RF6
RF6
RF6
Water Heater Model Number
RU98i/eN/P
RU98i/eN/P
RU98i/eN/P
Frame (HxLxD) – in
55.56 x 62.00 x 28.5
Crate Dimensions (LxWxH) - in
32
62x75x36
Weight - Assembly w/o WHs - lbs
124.6
116.6
100.6
Weight - Water Heaters - lbs
394.2
328.5
197.1
Weight - Fully Assembled - lbs
518.8
445.1
350.2
Weight - Packaging - lbs
148.0
148.0
148.0
Weight - Shipping (total) - lbs
666.8
593.1
498.2
Materials Details
Material Detail List
Description
(2, 3) RU98
In-Line Mount
Top Level Part No.
RW2, RW3
(4/4, 3/4, or 2/4) RU98
Back to Back (b)
(6/6, 5/6, 3/6) RU98
Back to Back (b)
RS4-4, RS4-3, RS4-2 RS6-6, RS6-5, RS6-3
Rack Frame - Specifications
RW2, RW3
RF4
RF6
Frame Rail Type
Sheet Metal
Sheet Metal
Sheet Metal
0.090 5052-H32
0.090 5052-H32
0.090 5052-H32
Powder Coat
Powder Coat
Powder Coat
Gray
Gray
Gray
Hot Water Trunk Line Diameter
2"
2"
2-1/2"
Cold Water Trunk Line Diameter
2"
2"
2-1/2"
Hot Water Trunk Line Material
Rigid Copper
Rigid Copper
Rigid Copper
Cold Water Trunk Line Material
Rigid Copper
Rigid Copper
Rigid Copper
Water Trunk Connection Type
2" MNPT
2" MNPT
2-1/2" MNPT
Water Header End Cap (field supplied)
2” FNPT
2” FNPT
2-1/2” FNPT
Hot Water Branch Line Diameter
3/4"
3/4"
3/4"
Cold Water Branch Line Diameter
3/4"
3/4"
3/4"
Hot Water Branch Line Material
CSST
CSST
CSST
Frame Material
Frame Finish
Color
Water & Gas Connections
33
Material Details
Material Detail List
continue from previous slide
Cold Water Branch Line Material
CSST
CSST
CSST
1-1/4" NPT
1-1/4" NPT
1-1/2" NPT
Gas Trunk Connection Type
1-1/4” MNPT
1-1/4” MNPT
1-1/2” MNPT
Gas Header End Cap (field supplied)
1-1/4” FNPT
1-1/4” FNPT
1-1/2” FNPT
Gas Trunk Line Material
Sch 40 Steel
Sch 40 Steel
Sch 40 Steel
Gas Branch Line Diameter
3/4"
3/4"
3/4"
Gas Branch Line Material
PVC over CSST
PVC over CSST
PVC over CSST
Powder Coat
Powder Coat
Powder Coat
Uni-Strut Size
1-5/8" x 13/16"
1-5/8" x 1-5/8"
1-5/8" x 1-3/8"
Uni-Strut Material
14ga Steel / Zn
12ga S/S
12ga S/S
Steel / Zn
S/S 18-8
S/S 18-8
Gas Trunk Line Diameter
Gas Trunk Line Finish
Hardware Material/Finish
34
Electrical/Flow Ratings
Electrical /BTU Input Ratings
Each water heater requires 120 VAC, 60 Hz. 4 amp power
source in a properly grounded circuit.
Electrical Requirements
(Installer shall provide electrical outlet
connections) Each unit has a 10 amp fuse.
Maximum circuit for each RU98 unit without a
built-in circulation pump is 4 amps.
RU98i: 64 W normal operation; 2 W standby; 146 W anti-frost
protection.
RU98e: 63 W normal operation; 2 W standby; 168 W anti-frost
protection.
BTU and Flow Rates for Common Vented RU98i/e (NG/LP)
2 RU98
3 RU98
4 RU98
6 RU98
Flow rate @ 70°F temperature rise (gpm)
10.8
16.2
21.6
32.4
Flow rate @ 100°F temperature rise (gpm)
7.6
11.4
15.2
22.8
398,000
597,000
796,000
1,194,000
Maximum input rate (Btuh)
35
The End
Rinnai
Rack System Training
Version 02282014GW