Connecting Multiple Water Heaters; Guidelines; High Altitude Installations - Rinnai RV53E Operation And Installation Manual

Connecting Multiple Water Heaters

The RV53i can use the EZConnect™ cable which
is an optional accessory that connects 2 water
heaters and allows them to function as one hot
water source.
The RV53i can use the MSA-2M and MSA-2S
packs which are optional accessories that connect
2 to 5 water heaters and allow them to function as
one hot water source.
The RV53e cannot use the EZConnect, MSA-2MB,
and MSA-2S. The RV53e can use Rinnai 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. Water heaters will turn
on as necessary to meet the demand for hot water.
Refer to the instructions that come with the
accessory for complete installation information.

Guidelines

• Do not install both the EZConnect™ and the MSA packs because they are not designed to operate together.
• Water heaters connected with the EZConnect™ Cable or the MSA-2M and MSA-2S packs cannot be used for
the bath fill function.
• Water heaters should be installed less than 18 inches apart so that the cables will reach between units and to
prevent temperature fluctuations (cold water sandwich effect) when the water is shut off and turned back on.
• Temperature settings can only be changed on the controller for the primary unit. (This changes the
temperature on all units within the MSA or EZConnect™ system.)

High Altitude Installations

Set switches 2 and 3 to the values shown in table
below for your altitude. The default setting for the
appliance is 0-2000 ft (0-610 m) with switches No. 2
and No. 3 in the OFF position.
Switch No. 2
Switch No. 3
0-2000 ft 2001-5200 ft
(0-610 m) (610-1585 m)
OFF
OFF
Switch No. Switch No.
ON
O O
1
F F
2
F F
3
4
5
6
7
8
RV53i & RV53e Operation and Installation Manual
Number of
Connected
Water Heaters:
2
(1) EZConnect™ Cable
3
4
5
WARNING
5201-7700 ft
(1585-2347 m)
OFF
ON
Switch No.
ON
O
1
F
2
F
3
4
5
6
7
8
Accessories Necessary:
or
(1) MSA-2M
and
(1) MSA-2M (1) MSA-2S
and
(1) MSA-2M (2) MSA-2S
and
(1) MSA-2M (3) MSA-2S
DO NOT adjust the other
switches unless specifically
instructed to do so.
7701-10200 ft
(2347-3109 m)
ON
OFF
Switch No.
ON
O
1
F
2
F
3
4
5
6
7
8
ON
ON
ON
1
2
3
4
5
6
7
8
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