User Guide

page 9
PROVING SWITCH ADJUSTMENTS
Refer to the following for air pressure switch adjustment
procedure and system checkout procedures before operating
the appliance continuously.
After proper air ow is established, the air pressure switch
adjustment is made by turning the adjustment screw clockwise
(See Figure 14) until the burner operation stops on the furnace.
Slowly turn the adjustment screw counterclockwise until burner
ignites. Make notice of the position of the adjustment screw,
then turn the adjustment screw an additional
1
⁄4 to
1
⁄2 turn
counterclockwise to ensure adequate switch adjustment.
NOTE: Under most circumstances,
1
⁄4 turn is typical, however,
1
⁄2 turn may be necessary to avoid short cycling
due to extreme wind uctuations.
WARNING: Failure to properly adjust the air pressure switch as specied in the proving switch section
could lead to improper operation of the venting system which will result in product damage, personal
injury, or death.
POST PURGE TIMER
The CK-43F Control Kit is designed with a non-adjustable purge timer and no adjustment is necessary. The
nominal time is 1-3 minutes, and approximately 1.5 minutes is typical.
ADJUSTMENTS FOR THERMOSTATS WITH HEAT ANTICIPATORS
After venting kit installation and checkout, check the amperage current draw through the thermostat circuit and
adjust the thermostat anticipator accordingly.
GENERAL INSTALLATION INSPECTION
Recommended procedures for safety inspection of an appliance in accordance with the National Fuel Gas
Code, ANSI Z223.1 or CAN/CGA B149.1-M91 or CAN/CGA B149.2-M91. 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 o 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. If, after completing Steps 3 through 7, it is believed
sucient combustion air is not available, refer to the National Fuel Gas Code, ANSI Z223.1, CAN/CGA
B149.1-M91 or CAN/CGA B149.2-M91, or any applicable local codes for guidance.
1. Visually inspect the venting system for proper size and determine that there is no ue gas spillage,
blockage, restriction, leakage, corrosion, or other deciency which could cause an unsafe operation.
2. Insofar as practical, close all building doors, replace dampers, windows, and all doors in area in which
the appliance is located. Turn on clothes dryers and exhaust fans, such as range hoods and bathroom
exhausters, so they operate at maximum speed. Do not operate a summer exhaust fan.
3. Place in operation the appliance being inspected. Follow the lighting instructions and adjust thermostat so
appliance will operate continuously.
Figure 14