Warning, High altitude installations, Connecting multiple water heaters – Rinnai RC98HPE User Manual
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Manual - Rinnai Condensing Water Heaters
High
Altitude
Installations
0-2000 ft
(0-610 m)
2001-5200 ft
(610-1585 m)
5201-7700 ft
(1585-2347 m)
7701-10200 ft
(2347-3109 m)
Switch No. 2
OFF
OFF
ON
ON
Switch No. 3
OFF
ON
OFF
ON
Set dip 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. 
Connecting Multiple Water Heaters
WARNING
DO NOT adjust the other dip 
switches unless specifically 
instructed to do so. 
Switch No.
F
O
F
8
5
7
6
4
3
ON
1
2
Switch No.
F
O
F
8
5
7
6
4
3
ON
1
2
Switch No.
F
O
F
8
5
7
6
4
3
ON
1
2
Switch No.
F
O
F
8
5
7
6
4
3
ON
1
2
The EZConnect™ cable is an optional accessory that 
connects 2 water heaters and allows them to function 
as one hot water source. 
The MSA-2M and MSA-2S packs are optional 
accessories that connect 2 to 5 water heaters and 
allow them to function as one hot water source. 
Refer to the instructions that come with the accessory 
for complete installation information. 
Number of Connected Water Heaters:
Accessories Necessary:
2
(1) EZConnect™ Cable
or
(1) MSA-2M
3
(1) MSA-2M
and
(1) MSA-2S
4
(1) MSA-2M
and
(2) MSA-2S
5
(1) MSA-2M
and
(3) MSA-2S
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.
