THERMO 2000 VOLTMAX 23 Use & Care Manual Download

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TURBOMAX Use and Care Manual with Installation Instructions July 2014 Page

When the temperature of the boiler water in the
heater is below the setting on the tank control
(aquastat), the boiler and circulator should start.
If a zone valve is used for this zone, it should
open at this time.

When the temperature of the boiler water in the
heater tank reaches the temperature setting on
the tank control, the boiler and circulator should
turn off (and the zone valve, if used, should
close).  If other zones for heating are creating
demand, this would also cause the boiler and
circulator(s) to run.  Cycling of the boiler on high
limit is not abnormal, particularly if only one zone
is creating demand.

On initial start-up with a cold tank, a
considerable amount of time may be required for
the tank to reach desired temperature.  Check
the temperature at a hot water faucet soon after
the burner has completed the first heating cycle.
Adjust TURBOMAX

aquastat as needed.

Note that setting to a lower setting will not have
an immediate effect.  The stored boiler water will
first have to be used.  Additional checks of the
water temperature should follow completion of a
cycle.  Further adjustments may be necessary
as you use your water heater and space heating
system.

The TURBOMAX

aquastat is adjusted to 180F

with a 10F diff. when shipped from the factory.
To meet commercial water use needs, it is
adjustable up to 195°F.  However, water
temperature over 125°F can cause severe burns
instantly or death from scalds.  This is the
reason why we recommend the installation of an
automatic mixing valve on the distribution
system.

Aquastat

Set the desired cut-in setting first by turning the
Temp. adjustment screw then set the desired
differential by turning the differential screw

OPERATING THE WATER HEATER WITH
A THERMOSTATIC MIXING VALVE

A thermostatic mixing valve provides for
automatic operation through the use of a
thermostatic element inside the valve.  The
element will control the mixing of the hot and
cold water supply streams to provide a safe
blend to connected fixtures.  This provides
constant water temperature under different
working conditions.

When using models which are certified ASSE
1017-1998 and, in addition, have successfully
passed the cold water supply failure test (ASSE
1016-1996), loss of either hot or cold water to
the thermostatic mixing valve will result in a
reduction in flow from the valve to less than .5
GPM within seconds of the loss.  Pressure
difference between Hot and Cold ports should
not exceed 10 psi.  Valves require a minimum
difference of 20°F between the Hot and Mixed
temperature for proper operation.

To set the thermostatic mixing valve carefully
open a hot water tap.  Protect yourself against
the risk of scalding.  Use a thermometer and
measure hot water temperature form the faucet.
Reduce or increase the hot water temperature
by adjusting the valve knob to the proper
position.  Lock the knob at the set temperature.
Refer to the valve manufacturer’s manual to get
the proper guidelines.

By mixing domestic cold water to the hot water
supplied by the heater, the thermostatic mixing
valve allows the boiler to work at higher
temperature range.  Thus boiler water stored
inside the TURBOMAX

tank acts as a buffer

which increases boiler efficiency and the amount
of domestic hot water produced by the heater.

To increase hot water production and storage
capacity set the heater aquastat at a higher
temperature (from 140°F to 180°F). And
secondly set the thermostatic mixing valve at the
desired temperature (from 90°F to 120°F).

For sanitation purposes use a different
temperature range or install a dedicated hot
water line to the equipment.