Design Manual

4 R-TRWH-E-02 Rev D
MSB Controller: The MSB kits can electronically connect up to 25 water heaters and allows them to function as
one hot water source. For use with Rinnai Tankless Water Heaters (except for models V53e,
V53i, and R63LSe which must use pressure activation valves, PVA). Refer to the information in
the next section for components.
EZConnect™ : The EZConnect™ cable is an optional accessory that electronically connects 2 water heaters
and allows them to function as one hot water source.
PVA Valves: Pressure activated valves that allow each water heater (max 5) to turn on as necessary to meet
the demand for hot water. A PVA valve is also useful when dedicating one Rinnai in a multiple
Rinnai system for hot water circulation. The PVA valve will allow flow from the cold water supply
to the dedicated unit when a differential pressure is exerted on the PVA valve due to domestic
demand.
Remote Controllers: MC-91-1US - Controller included with the unit except for the V53e and V53i.
MCC-91-1US - For commercial and hydronic applications allowing temperatures above 140º F.
MC-100V-1US - Deluxe controller
BC-100V-1US - Bathroom controller
Rinnai is continually updating and introducing new products and accessories. For the latest information, contact
Rinnai at 1-800-621-9419, FAX: [phone], or www.rinnai.us.
Certifications
Rinnai Accessories
Multiple Unit Connections (refer to model applicability)
• Do not install both the EZConnect™ and the MSA/MSB packs because they are not designed to
operate together.
• Water heaters connected with the EZConnect™ Cable or the MSA/MSB packs cannot be used
for the bathfill function.
• Temperature settings can only be changed on the controller for the primary unit.
• Do not use the EZConnect™ or MSA/MSB packs with storage tank applications.
Guidelines for
multiple unit
connections:
Rinnai Installation Kits - Valve kits provide isolation valves (for hot and cold lines) and a pressure relief valve. Models
RV53e, RV53i, RL75i/e, RL94i/e, RC80i/e, and RC98i/e include isolation valves and a
pressure relief valve.
Recess Boxes: Recesses unit into the wall, protecting and hiding the unit from view
Pipe Covers: For security, weather protection, and finished look
R
These models are built in accordance with the requirements of the ASME Boiler and
Pressure Vessel Code and received the Certificate of Authorization from the National
Board. The heat exchanger has the NB and the HLW stamps.
R98LSiASME
R98LSeASME
R98iASME
C98iASME
R98eASME
C98eASME
WRIK-LF-F Valve kit (for models rated below 200,000 Btuh), Lead Free, 3/4” - E2 version,
FNPT X FNPT, (threaded)
WRIK-LF-32F Valve kit (for models rated above 200,000 Btuh), Lead Free, 3/4” - E2 version,
FNPT X FNPT, (threaded)
104000059 Freeze Protection Solenoid Valve Kit