Rinnai RUR98i Manuel D'installation Et D'utilisation page 44

Cross Over Mode
Cross over mode requires a thermal bypass valve
(included); Refer to Installation of Plumbing section
(Cross Over Mode Plumbing Diagram)
Thermal Bypass Valve:

Thermal bypass valve is installed between hot and
cold line on furthest fixture (ie. end of
domestic water supply).

The valve helps regulate flow from the hot water
line to the cold water line allowing for quicker
delivery of hot water.

No more than 1 thermal bypass valve should be
installed per water heater.

Refer to thermal bypass valve instructions for fur-
ther information.
(Recirculation using cross over mode may result in
combustion icon switching ON and OFF several times,
this is normal.)
Thermal Bypass Valve
Maximum Pipe Length*
(Hot and Cold Water Supply Lines)
Pipe Diameter
Short Loop
Long Loop
(*Take equivalent elbow lengths into consideration when
calculating pipe length.)
Cross Over Mode Pump Intervals
Pump Status
ON
OFF
* The pump will cycle ON and OFF at these intervals. These intervals are calculated based on the insulation, loop length, and
estimated heat loss in the system.
44
3/4" 1/2"
200ft 50ft
400ft 100ft
Long loop Mode (201 - 400ft)
Economy
Comfort
KBP Series Manual
Dip Switch settings for Cross Over Mode (DIPSW 2)
Operation
Pump OFF
Short Loop
Economy Mode
Short Loop
Comfort Mode
Long Loop
Economy Mode
Long Loop
Comfort Mode
Typical Intervals (minutes)
Short loop Mode (Up to 200ft)
16
10
4
SW 4 in SW 7 in
DIPSW2 DIPSW2
OFF OFF
ON ON
ON ON
ON OFF
ON OFF
8
10
4
SW 8 in
DIPSW2
OFF
OFF
ON
OFF
ON