Field Controls SWG-AF Série Mode D'emploi page 9

CAUTION
If sufficient combustion air for the burner is not available, additional combustion air should be supplied
from outside the structure. The air inlet should be on the same wall as the power vent discharge. For example, tightly
constructed homes and weatherized homes are 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 national and/or local code requirements for combustion and makeup air requirements.
DIP-1 DRAFT INDUCER PROVING SWITCH ADJUSTMENTS:
WARNING: The pressure switch must be properly adjusted!
Follow appliance manufacturer's instructions, light the appliance and adjust the RC Draft
Control barometric damper and/or the appliance draft controls to obtain the minimum
draft recommended by the appliance instructions. After the appliance has operated a
sufficient time to establish stable combustion, adjust pressure switch sensitivity by turning
the pressure switch adjustment screw "clockwise" (see Figure 14) until burner feed
system operation stops. Then turn the adjustment screw "counter-clockwise" until burner
feed system starts operating. Turn the adjustment screw an additional ¼ to ¾ of turn
"counter-clockwise" more to ensure adequate switch adjustment. Readjust the RC Draft
Control barometric damper and/or the appliance draft controls to provide the normal
recommended operating draft.
WARNING: Failure to properly adjust the pressure switch as specified above can lead to Death, Personal Injury and
or Property Damage.
WARNING: GENERAL INSTALLATION INSPECTION MUST BE PERFORMED!
GENERAL INSTALLATION INSPECTION
Recommended procedures for a safety inspection of an appliance, in accordance with National Codes. The following
procedure will help evaluate the venting system. It is intended as a guide to aid in determining that the venting system is
properly installed and is in a safe condition for continuous use. This procedure should be recognized as a generalized
procedure which cannot anticipate all situations. Accordingly, in some cases, deviation from this procedure may be
necessary to determine safe operation of the equipment. If it is determined that a condition exists which could result in
unsafe operation, the appliance should be shut off and the owner advised of the unsafe condition. Corrections must be
made before the appliance is put into continuous operation. The following steps should be followed in making a safety
inspection.
1. Visually inspect the venting system for proper size and determine that there is no flue gas spillage, blockage,
restriction, leakage, corrosion or other deficiency which could cause an unsafe operation.
2. Insofar as practical, close all building doors, fireplace dampers, windows and all doors in area in which the
appliance is located. Turn on clothes dryers, any exhaust fans, such as range hoods and bathroom exhausts so
they operate at maximum speed. Do not operate a summer exhaust fan. If, after completing Steps 3 through 7 it is
believed sufficient combustion air is not available, refer to the National Flue Gas Code A.N.S.I.Z223.1, or any
applicable local codes for guidance.
3. Place in operation the appliance being inspected. Follow the lighting instructions and adjust thermostat so
appliance will operate continuously.
4. Determine that the burner is operating properly and that the main burner ignition operates satisfactorily, by
interrupting and re-establishing the electrical power of the appliance in any convenient manner. Test the burner
safety device to determine if it is operating properly by disconnecting the pressure switch sensing tube from the
pressure switch.
5. Visually determine that the burner is burning properly; i.e., no floating, lifting or flashbacks. This can indicate
reduced available combustion air to burner.
6. If appliances are equipped with high and low flame control or flame modulation, check for proper burner operation
at low flame.
7. Test for spillage at the barometric draft control opening and burner inlet air location after 30 minutes of burner
operation. Use a draft gauge, flame of a match or candle, smoke from a cigarette, cigar or pipe. If spillage occurs,
adequate air is not available. Shut off heating appliance thermostat and check for spillage around the barometric
draft control or burner inlet air location after power vent has stopped operation. If a flow reversal is noticed, house
de-pressurization is occurring and make up air is required.
8. Turn on all fuel burning appliances within the same room so that they will operate at their maximum input. Then
repeat Steps 5 through 7.
9. Return doors, windows, exhaust fans, fireplace dampers and any other fuel-burning appliances to their previous
condition of use.
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Figure 14