54
Avenger models feature a staging relay card which provides additional logic to open and close relays at factory set pre-determined points
based on a Vdc signal provided by the VFD. These relays provide a means to activate/deactivate at various points in the boiler operation:
1) Low-End and High-End Gas Valves (R1)
2) Re-light Hot Surface Igniter (R2 & R3)
3) Electronic Air Switch (R4)
To maintain longevity and reliable operation of the hot surface igniter (HSI), the HSI is only activated during the transition from one gas
valve to another using R2 and R3 relays.
7.4 OUTER JACKET
The outer jacket assembly is constructed from galvanized steel with silver and black color/texture. The frames are constructed from
Aluminum. This setup ensures light weight and long life for the jacket assembly, with full integrity. Removable panels have been
incorporated to the design for ease of service.
7.5 VENTING TRANSITION
All appliances are shipped with a female vent outlet pipe. Depending on the appliance category (II or IV), an increaser will be required for
the proper vent configuration. Please refer to Table 3 dimensions and specifications.
7.6 CONDENSATION COLLECTION
Depending on water temperatures and firing rate there may be large volumes of condensate generated. At high fire with condensing inlet
water temperatures less than 130
°
F, condensate will be ejected from the vent outlet pipe and into the vent. It is recommended that
provisions be made for collection and disposal of condensate from the vent. At low fire with condensing inlet water temperature,
condensate will be generated within the secondary pass of the heat exchanger and will fall into the bottom collection pan. This condensate
will be collected in the condensate box provided with the Avenger. The condensate box provided with the Avenger has two connections.
One connection (flex metal) removes condensate from the bottom pan and the other connection (flexible plastic) removes condensate
from the vent outlet pipe.
7.7 COMBUSTION AIR FAN
Figure 35: Fan, Burner, Hot Surface Igniter and UV Scanner Arrangement
Avenger uses a sealed air fan to provide combustible air/gas mix to the burner and push the products of combustion through the heat
exchanger and venting system. The fan assembly consists of a sealed housing and fan wheel constructed from spark resistant cast
aluminum. The fan is operated by a fully enclosed 230 VAC, 3-phase electric motor. The fan housing and motor assembly is fully sealed
and SHOULD NOT be field serviced. The power draw of the motor is proportional to the modulated gas input rate of the appliance.
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