Rinnai Rice Cooker REU-PVA Installation Manual

REU-PVA Pressure Activated Valve

INSTALLATION INSTRUCTIONS

Application

Pressure activation valves (PVA’s) can be used to manifold 2 to 5 Rinnai water heaters in order to
produce a stable water temperature and allow the water heaters to run efficiently. PVA’s can be used to
manifold indoor or outdoor models. See Figure 1.

Figure 1

Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

Installation

Install the PVA valve at the inlet of the water heater
in the correct orientation as shown in Figure 2.

In a manifolded system, PVA valves will be
installed on all but one unit. Set each PVA to a
different activation pressure, except on the 4th and
5th unit. This allows each unit to come on as
necessary to meet the demand for hot water. Set
the activation pressure on the second unit to its
lowest activation point. Set the third unit to the
second lowest activation point, and so forth. If 5
units are manifolded then set the 4th and 5th unit to
the same activation point. See Figure 3.

How to Adjust the Activation Pressure

1. Unlock the adjusting rod by removing one
screw and loosen the other screw that holds
the stopper in place. See Figure 2.

2. Move the stopper and pull the rod out to reduce
the activation pressure. (3 notches will be
visible when completely extended).
Push the rod in to increase the activation
pressure. Do not push the rod completely into
the valve.

NOTICE

Figure 2

Figure 3

Water heaters should be installed
less than 18 inches apart to
prevent temperature fluctuations.

Water heaters should be at the
same temperature setting.

WATER
HEATER
INLET

STOPPER

ADJUSTMENT
ROD

3. Install the stopper with 2 screws to lock the
adjusting rod.

2nd Unit 3nd Unit 4th and

5th Unit

02/2008 100000068