Ascent Oil – August 2019 22
ADVANCED SETTINGS
To improve efficiency, the EK1T Ascent Combi and the EK1T+ Ascent Plus Combi boilers have been equipped with
advanced features designed to reduce idle loss (the energy required to keep the boiler in standby mode).
Option 1 (OP1) – Maintain Temperature – Good Efficiency, Best Hot Water Convenience
Option 2 (OP2) – Cold-start On Demand Hot Water – Best Efficiency, Good Convenience
Option 3 (OP3) – Advanced Learning – Better Efficiency, Better Convenience
Option 4 (OP4) – Advanced Learning – Better Efficiency, Better Convenience - For inconsistent schedules
Option 1 (OP1): The EK1T Ascent Combi and EK1T+ Ascent Plus Combi ship in the least efficient mode, Option 1, or
OP1. In this mode, the boiler will maintain a minimum temperature (factory set to 145°F with a LL setting of 170º F) to
ensure hot water can be instantly produced at all times. This is similar the way traditional tankless coil boilers operate
although they typically maintain significantly higher temperatures than are required by the Ascent boilers. Even in this
setting, significant savings over traditional tankless coil boilers will be realized.
Option 2 (OP2): This mode is much more efficient and the boiler operates as a cold start system for heat and hot water.
The boiler will not maintain temperature (although it may be hot for a large portion of the heating season) and may not
always be able to instantly produce hot water. A hot water draw of at least 30 seconds will enable the boiler to fire. The
boiler will take roughly 2-3 minutes to reach full operating temperature, during which the boiler will send out progressively
warmer pulses of water as part of its preheat and condensation protection operation. To speed preheating and reduce
water use, the boiler can be activated instantly with a “double pump”: Turn the hot water on and off twice in quick
succession at any fixture in the house. The boiler will recognize this as a requirement to preheat and quickly get ready to
make hot water. With a “double pump,” the hot water fixture can be left off and the boiler will preheat. The Ascent boilers
are well insulated and will remain hot for over 2 hours after preheating, so after activated, the water will be ready for an
extended period of time.
Option 3 (OP3): This option is a compromise between maximum efficiency and convenience. In this mode, the boiler
will learn your schedule over the course of two weeks. The boiler will automatically preheat anytime your usage pattern
indicates a hot water draw may be imminent. This mode will use more fuel than OP2, however it will provide significant
savings over OP1 as long as your schedule is reasonably consistent. If the boiler does not correctly anticipate your
schedule, the same draw patterns as OP2 will activate the boiler (30 second draw or cycling the hot water faucet twice in
succession).
Option 4 (OP4): This option is a compromise between maximum efficiency and convenience. Like Option 3, in this
mode, the boiler will learn your schedule over the course of two weeks in particular by identifying periods with no hot water
demand like night time hours. The boiler will automatically preheat anytime your usage pattern indicates a hot water draw
may be imminent based on any usage in the past two weeks. This mode will use more fuel than OP2 and OP3, however it
will provide savings over OP1 and is ideal if your schedule is less consistent. If the boiler does not correctly anticipate your
schedule, the same draw patterns as OP2 will activate the boiler (30 second draw or cycling the hot water faucet twice in
succession).
NOTE: The Ascent Hydrostat does not have ‘persistent memory’ meaning that cycling the power will erase usage memory.
The Ascent Hydrostat will begin relearning usage patterns once power is restored.
SELECTING ADVANCED SETTINGS
The advanced settings can be activated using the red “Test/Reset” button on the Ascent Hydrostat control. Pressing the
button will cycle through system parameters and eventually the advance settings options, displayed as options 1, 2, 3, or 4
(‘OP1’, ‘OP2’, ‘OP3’, and ‘OP4’). Pressing and holding the red button will cause the display to flash so the Option Mode
may be selected. Once the control is flashing, press the red button to cycle through OP1, OP2, OP3, and OP4 until you
reach the desired setting. Releasing the button for 2 seconds will select the last option displayed. The control will then
return to the main temperature display.
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