Specifications

24
Matrix Installation and Operation Instructions
acid. Pump the cleaning liquid through the exchanger. For optimum cleaning, the cleaning solution flow rate should be a minimum
of 1.5 times the normal flow rate, preferably in a back-flush mode. After use, do not forget to rinse the heat exchanger carefully
with clean water. A solution of 1-2% sodium hydroxide (NaOH) or sodium bicarbonate (NaHCO3) before the last rinse ensures
that all acid is neutralized. Clean at regular intervals.
DHW Limitations: As the Matrix produces domestic hot water instantaneously; there are inherent limitations of the system:
NO STORAGE - As there is no water storage, the boiler can only provide water at the temperature specified at the corresponding
flow rates. Flow through the fixtures must be regulated so flows don’t exceed the ability of the boiler to heat the water. MORE
FLOW = LESS TEMPERATURE.
DOESN’T MAINTAIN TEMPERATURE – When there is no call for domestic the unit is off. From a dead stop the unit will detect
flow and start providing heat in 15 seconds, and be up to capacity by 25 seconds. Once running, the unit can provide an endless
amount of hot water. If the flow is momentarily turned off for whatever reason, the unit will turn off. Once off, the unit must
relight, and not provide heat for 45-75 seconds. This will cause cold unheated water to pass through the unit, and advance through
the domestic plumbing between the previously heated (hot) water, and the new (hot) water. This can be mistaken for an inability to
adequately heat the water.
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
Outlet Water (F)
140
2.7 2.8 3.0 3.2 3.4 3.6 3.9
To avoid having too much flow at your faucets use the throttling valve after the mixing valve to limit the overall flow of domestic
hot water. If the flow rates listed in the table are not high enough for the application, install a storage tank with re-circulating loop
as per Section 7.2. Follow these instructions to achieve the best delivery of DHW.
Open throttle valve fully.
Turn the dial on the mixing valve to the desired setting (do not exceed 120˚F or a dial setting greater then 2).
Create the maximum amount of DHW flow that is likely to occur on a regular basis. (Usually tub faucet, or choose two other
faucets)
Allow the boiler to reach steady state, and then throttle the shut-off valve until the hot water exiting the plate heat exchanger is
warmer than the mixed water exiting the mixing valve. Ensure the boiler is firing at the maximum rate, if not increase the LO
setting and repeat this step. (It is beneficial to keep the LO setting as low as possible to limit short cycling and maintain efficiency)
Table 7.1 Matrix DHW Flow Rates (flow rates in usgpm)