Submittal Sheet

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Fi
g
ure 11
Figure 12
Figure 13
CLASS B AND CLASS L DOUBLE WALL VENT PIPE INSTALLATION
(Follow vent pipe manufacturer's listed or recommended clearances from combustible material)
1. Using a hand crimper or a like device, crimp the inner pipe of the CV power venter approximately 1" long. (See
Figure 7)
2. Attach the vent pipe over the crimped end of the CV power venter inner pipe.
3. Secure the vent pipe to the CV power venter inner pipe with at least (3) three #8 sheet metal screws. Pre-drilling
the holes through both pipes will allow easier fastening.
WIRING
NOTE: Refer to appropriate control kit for proper installation instructions.
Wire the power venter motor and controls in accordance with the National Electric Code and applicable local codes. UNIT
MUST BE GROUNDED. Check ground circuit to make certain that the unit has been properly grounded. The wiring should
be protected by an over-current circuit device rated at 15 amperes. CAUTION MUST be taken to ensure that the wiring
does not come in contact with any heat source. All line voltage and safety control circuits, between the power venter and
the appliance, MUST be wired in accordance with the National Electrical Code for Class 1 wiring or equivalent.
AIR FLOW ADJUSTMENTS
In order to obtain proper system draft, the power venter has an airflow adjustment damper built in.
When used in a system with a barometric draft control, this damper should be used to make
coarse draft adjustments while the barometric should be used for finer adjustments. Loosen the
locking screw on the air flow adjustment damper on the outer pipe of the power venter. (See
Figure 8) Adjust the damper to the full open position. Follow appliance manufacturer's procedures
for starting the heating appliance. Then adjust the thermostat to call for "Heat". After the system
has operated for several minutes to stabilize flue gas temperatures, check for negative draft or
up-draft at the heating appliance outlet or air flow into the draft hood. Use a draft gauge, velocity
meter or match test procedure. Adjust the adjustment damper closed to obtain the minimum air
flow required to maintain draft. Then increase air flow slightly (10% over minimum air flow rate) to
ensure proper venting. For oil-fired or gas-fired power burners, adjust draft to proper over-fired
draft.
If proper draft has been established, tighten the adjustment locking screw. For gas-fired systems, shut off thermostat and
check for residual heat spilling from draft hood. If this occurs, a post purge timer may be required. If so, use a Field
Controls PPC-5 Electronic Post Purge or a Control Kit which includes one. Before installing, refer to the General
Installation Inspection to check for negative pressure problems in the building. If sufficient combustion air for the burner is
not provided, a flow reversal during the off cycle could occur within the venting system. This may cause combustion
problems as well as condensation that could block the air pressure sensing tube. It may also contribute to premature motor
failure. Combustion, and/or make-up air, should be supplied from outside the structure and the air inlet should be on the
same wall as the power venter discharge, if the combustion air feature of the power venter is not used. For example, tightly
constructed homes and homes retro-fitted from electric heated systems are more likely to experience combustion and/or
make-up air problems. For further information consult "The Field Report-Effects of insufficient combustion air on draft and
heating systems". Refer to the appropriate control kit installation instructions for pressure switch adjustment procedure and
system checkout procedures before operating continuously. NOTE: After proper venting has been established, it is
recommended that a combustion test on gas and oil units, a check for CO levels on gas units, and a smoke test on oil
systems be performed to ensure maximum burner efficiency. Oil burner air adjustments should be set at a zero to a trace
smoke at the highest or recommended CO
2
% setting set by heating equipment manufacturer.