Specifications

25
Matrix Installation and Operation Instructions
7.1.1 Matrix DHW without Storage
The Matrix will provide domestic hot water
continuously w hen flow is sensed by the flow-
switch. This method is the most efficient means
of heating water by allowing the boiler to operate
at a lower return water temperature, thus
increasing combustion efficiency.
7.1.2 Matrix DHW with Storage
In larger demand
applications, a storage tank
may be added. In this
application the Matrix will
provide hot water to
maintain temperature in the
storage tank. The aqua-stat
initiates the pump which
activates the optional flow
switch. The flow switch
provides the call at the
boiler. In this application
the flow switch may be
replaced by an isolation
relay activated by the aqua-
stat. The normally open
contact can then provide
24V to FS on the Matrix.
Figure 7.1 DHW Piping
Domestic
Water In
(
Cold
)
Domestic
Water Out
(
Hot
)
Throttling Valve
Check Valve
Plate Heat
Exchanger
Thermostatic
Mixing Valve
Drain for
Cleaning
Flow
Switch
No elbows within
2” of flowswitch
(
either end
)
For the state of Massachusetts
Combi must
be field equipped
with 150 PSI
relief valve as
shown (not
provided)
C
H
M
Relief
V
a
lv
e
Figure 7.2 DHW Piping with Storage
Tank
Supply
Plate Heat
Exchanger
Domestic
Water Out
(
Hot
)
Check Valve
Thermostatic
Mixing Valve
Drain for
Cleaning
Flow Switch
(Optional)
Tank
Return
Domestic
Water Out
(
Cold
)
Cold Water
Supply
Circulator started
by tank aquastat
No elbows within
2” of flow switch
(either end)
IMPORTANT
Follow mounting instructions provided with the flow switch.
For the state of Massachusetts
Combi must
be field equipped
with 150 PSI
relief valve as
shown (not
provided)
C
H
M
Relief
V
a
lv
e