26
Matrix Installation and Operation Instructions
Procedure for Setting up Domestic Hot Water:
If the Matrix is being installed in an application that uses municipal water,
often the pressure is high enough to generate flow rates at the faucets that will exceed the appliances capacity to heat it. See the
following table to determine what flow can be expected at various inlet and outlet water temperatures.
Inlet Water Temperature (deg. F)
40
45
50
55
60
65
70
110
3.9 4.2 4.5 4.9 5.4 6.0 6.7
115
3.6 3.9 4.2 4.5 4.9 5.4 6.0
120
3.4 3.6 3.9 4.2 4.5 4.9 5.4
125
3.2 3.4 3.6 3.9 4.2 4.5 4.9
130
3.0 3.2 3.4 3.6 3.9 4.2 4.5
135
2.8 3.0 3.2 3.4 3.6 3.9 4.2
Outle
t Wa
ter
(F)
140
2.7 2.8 3.0 3.2 3.4 3.6 3.9
To avoid having too much flow at the faucets use the throttling valve located at the “Cold Supply” in Figure 7.1 to limit the overall
flow of domestic hot water. Follow these instructions to achieve the best delivery of DHW:
o
Open throttle valve fully.
o
Turn the dial on the mixing valve to the desired setting (do not exceed 120
˚
F).
o
Create the maximum amount of DHW flow that is likely to occur on a regular basis. (Usually tub faucet, or choose two other
faucets)
o
Allow the boiler to reach steady state, and then throttle the shut-off valve until the hot water exiting the plate heat exchanger is
slightly warmer than the mixed water exiting the mixing valve. Ensure the boiler is firing at the maximum rate, if not increase
the H20 setting and repeat this step. (It is beneficial to keep the H20 setting as low as possible to limit short cycling and
maintain efficiency)
If the flow rates listed in Table 7.1 are not high enough for the application, install a storage tank with re-
circulating loop as per Section 7.2.2 and Figure 7.2.
7.2.2 Matrix w/ DHW Storage Tank
To completely avoid the DHW limitations inherent with on demand hot water heating, install a DHW storage tank as per the DHW
plumbing schematic shown in Figure 7.2. When the tank temperature is insufficient, an aqua-stat (T-stat) located within the storage
tank completes a 120VAC circuit to a potable (bronze or Stainless Steel) circulating pump. The pump circulates water from the
bottom of the storage tank (typical location of a drain fitting) to the DHW inlet fitting of the Matrix (Rear fitting to the Flow Meter
and Brazed Plate Heat Exchanger). The Matrix Flow Meter senses the water flow and triggers a DHW demand; heated water flows
from the Matrix and enters the inlet fitting of the storage tank.
Table 7.1 Matrix DHW Flow Rates (flow rates in usgpm)
