Adjustments; Installation Of Gas Pressure Switch; Draft Hood Safety Switch Installation Procedure - Field Controls CK-91FV Quick Start Manual

ADJUSTMENTS

PROVING SWITCH ADJUSTMENTS
After proper airfl ow is established, the pressure switch adjustment is made
by turning the pressure switch adjustment screw clockwise (See Figure 7)
until burner operation stops. Turn the adjustment screw counterclockwise
until burner ignites. Turn the adjustment screw an additional
counterclockwise to ensure adequate switch adjustment.
WARNING: Failure to properly adjust the pressure
switch as specified above could lead to improper
operation of the pressure switch which will result in
a hazardous condition and bodily harm!
THERMOSTAT HEAT ANTICIPATOR ADJUSTMENT
After venting kit installation and checkout, check the
amperage current draw through the thermostat circuit and
adjust the thermostat anticipator accordingly.

INSTALLATION OF GAS PRESSURE SWITCH

CAUTION: Check gas control valve pressure. Pressure
MUST NOT exceed 14" WC pressure.
1. Remove pressure tap plug in gas valve. (See Figure 8)
NOTE: If installing on an existing appliance, shut off
gas supply to gas valve before plug removal.
2. Replace the pressure tap plug with the
and pipe tee. Install pressure tap plug at the bottom
of the pipe tee. (See Figure 9)
3. Install the gas pressure switch into the side of the
pipe tee. The gas pressure switch is supplied with
a restrictor orifi ce in the inlet and outlet ports. With
these orifi ces in place, the switch does not need to
be vented. This feature complies with current ANSI
standards for gas regulators. (See Figure 10).
CAUTION: If for any reason the system has shut down during
operation, the cause of the system failure should be investigated
and corrected before resetting the safety switch and restarting
the system.

DRAFT HOOD SAFETY SWITCH INSTALLATION PROCEDURE

NOTE: 12 ga. wire should be used when wiring safety spillage
switches, to reduce the voltage drop in the thermocouple circuit.
1. Remove the thermocouple from the gas control valve. (See
Figure 8)
2. Thread the junction block into the thermocouple port and thermocouple
into the bottom of the junction block. Connect lead wire from the
junction block to the jacketed lead wires or wire enclosed in an
accepted wiring enclosure. (See Figure 11)
NOTE: Draft spillage switches should be mounted 90 degrees apart, and
mounted opposite from the vent outlet direction. (See Figure 12)
3. Mount the two spillage switches onto the draft hood and connect inside
terminals of switches with jumper wire. Connect outside terminals to
lead wires which are connected to the thermocouple junction block.
(See Diagram A)
4. Route
jacketed lead wires or accepted wiring enclosure on the outside of the water heater enclosure.
Secure them to the enclosure with an accepted hold down tab. Keep wiring away from any HOT surface area.
P/N 46285300 Rev F 01/18
⁄
1
4
⁄ " pipe nipple
1
8
page 4 of 8
to ⁄ turn
3
4
Figure 8
Figure 10
Figure 7
Figure 9
Figure 11
Figure 12
Figure 13