Bosch Thermotechnik 7 736 500 272, Руководство по установке

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Cascading operation
6 720 646 273 (2011/03)
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. 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
Fig. 1
NOTE: These water heaters may
not be common vented. See
water heater installation manual.
OBJ_DOKU-6720646273-01.fm Page 15 Wednesday, April 13, 2011 6:26 PM