Bosch 7 736 500 272 Manual Del Usuario página 15

OBJ_DOKU-6720646273-01.fm Page 15 Wednesday, April 13, 2011 6:26 PM
2 Cascading operation
Cascading allows up to twelve appliances to be
connected in parallel.
One of the appliances will serve as the controlling
primary appliance and will attempt to meet the
hot water demand. If the hot water demand is
beyond the capacity of the primary appliance, a
signal is sent to one or more of the secondary
appliances to ignite. A cascading kit (part no.
7736500272) must be purchased and installed
for each secondary appliance included in the
installation.
Example: A 7 unit cascade installation includes 1
primary appliance and 6 secondary appliances. 6
intelligent cascading kits must be purchased for
this installation.
With the Intelligent Cascading kit, after each 100
hours of operation, the system will automatically
rotate which heater is serving as the primary.
Fig. 1
NOTE: These water heaters may
not be common vented. See
water heater installation manual.
6 720 646 273 (2011/03)
2.1 Plumbing set up
The plumbing should be connected in the reverse
return method with a minimum number of elbows
to aid in balancing pressures between the
appliances.
Locating the appliances as close together as
possible improves performance.
Follow industry plumbing practices when
•
installing multiple appliances
Minimum pipe diameter: ¾ "
•
Minimum water pressure: 3.4 bar
•
Maximum distance between appliances: 1
•
meter
Insulate pipes to prevent heat loss
•
Cascading operation
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