9
energy to the bottom of the tank, where the hot gases are converted to water vapor, giving the heater a
combustion efficiency of 98% and thermal efficiency of up to 96%.
Modulating Combustion System
The modulating combustion system is designed to regulate firing rate based on heat demand. Total
System Control monitors tank operation, system parameters, and controls the firing rate of the burner,
providing only the energy required to satisfy both the domestic hot water and central heating needs.
Total System Control
Total System Control automatically manages the needs of both the central heating and domestic hot
water systems through the use of sensors. These sensors monitor inputs (such as outdoor temperature,
tank temperature, and heating module outlet temperature) providing data that allows accurate control of
the entire system. You may choose to use the control’s factory default settings or reprogram the system
parameters to provide design flexibility.
Hydronic Heating Module
The hydronic heating module connects to the storage tank through two dip tubes. The first dip tube draws
heated water from the top of the storage tank and circulates it through a brazed plate heat exchanger that
transfers the water’s stored energy to the hydronic side of the plate. Once the energy is transferred, the
water returns through the second dip tube to a lower section of the storage tank to continue circulating. A
stainless steel circulator pump modulates output, varying flow through the brazed plate heat exchanger to
meet domestic hot water and central heating demand. An outlet sensor provides feedback to the control
to assure accurate temperature control.
Venting System
This appliance vents in plastic pipe. Use only the approved venting material outlined in the venting
section (Part 8) of this manual. Vent size can vary from 2” to 3” depending on the appliance input rate.
The venting system requires an intake and exhaust vent. Special attention should be taken when
selecting vent location. Vents can run horizontally or vertically, depending on system design. Support the
vents as shown in the Venting Details Part 8.
Burner
The burner is constructed of high grade stainless steel and uses pre-mixed air and gas to provide a wide
range of firing rates.
Condensate Drain Connection
This is a condensing high efficiency appliance, and therefore has a condensate removal system.
Condensate is nothing more than water vapor derived from combustion products. Heater condensate is
similar to that of an automobile when it is initially started.
It is very important that the condensate line slopes away from the heater, down to a suitable drain. If the
condensate outlet is lower than the drain, you must use a condensate removal pump (kit p/n 554200,
available from HTP).
A condensate filter, if required by local authorities, will neutralize the condensate, and can be made up of
lime crystals, marble or phosphate chips. This filter can be purchased from HTP (p/n 7450P-212) and
installed in the field.
It is also very important that the condensate line not be exposed to freezing temperatures or any other
type of blockage. Plastic pipe must be the only material used for condensate line. Steel, brass, copper, or
other materials will be subject to corrosion or deterioration.
In a long, horizontal condensate line, a second vent may be necessary to prevent vacuum lock. Also, an
increase in pipe size and support of the condensation line may be necessary to allow condensate to drain
properly.
Содержание Versa Hydro PHE130-119
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Страница 32: ...32 F INTERNAL WIRING Figure 14 Internal connection diagram ...
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