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CONTROL KITS
1. For 24 volt control systems (intermittent pilot ignition): CK-41 control kit with the following components: Junction box
with mounted pressure switch and relay base, 24 volt relay for controlling power venter motor, 1 ft. length of 0.25"
aluminum tubing, 0.25" tubing connector, flexible metal clad conduit, GSK-3 spillage switch, wiring harness (30 ft.
length) to connect power venter control to water heater controls, 3 cable clamps to fasten the harness.
2. For millivolt control systems (standing pilots): CK-81 control kit with the following components: Junction box with
mounted pressure switch, 115V to 24V transformer, and 24 volt relay, 1 ft. length of 0.25" aluminum tubing, 0.25"
tubing connector, flexible metal clad conduit, GSK-3 spillage switch, wiring harness (30 ft. length) to connect power
venter control to water heater controls, 3 cable clamps to fasten the harness.
GENERAL SYSTEM OPERATION
P
V
K
F
OWER
ENTER
ITS
OR
1. The water heater aquastat contacts close and the flue damper (if part of water heater) opens. When the damper
opens all the way, the end switch contacts in the damper motor close, completing the 24 volt circuit to the CK-41
control box causing the motor relay contacts to close and start the power venter motor.
2. When the power venter blower reaches operating speed, the resulting vacuum cause the pressure switch contacts to
close. The 24 volt control circuit flows through the pressure switch contacts in the CK-41 control box and through the
normally closed spillage switch contacts on the draft hood, completing the circuit to the ignition module on the water
heater control box. The ignitor lights the pilot and the main gas valve opens causing the main burners to light.
3. If the venting system becomes disconnected or plugged between the power venter and the water heater vent
connection, the flue products will spill out of the draft hood relief opening, heat up the spill switch temperature disc
and cause the contacts to open and interrupt power to the ignition module causing the gas valve to close and stop the
burners. If the power venter blower fails to operate, the pressure switch contacts will not close and the burners remain
off.
4. When the aquastat is satisfied, the contacts open and stop the power venter, interrupting power to the ignition module
and gas valve, and the flue damper closes.
P
V
K
F
M
OWER
ENTER
IT
OR
1. When the aquastat contacts close, the 24 volt circuit is completed from the transformer, through the wiring harness
and switch contacts, and through the relay coil causing the motor relay contacts to close and start the power venter
blower.
2. When the blower reaches operating speed, the vacuum near the blower causes the pressure switch contacts to close
and complete the millivolt circuit through the normally closed spill switch contacts to the gas valve, allowing main gas
to flow to the burners and ignite from the pilot.
3. If the venting system becomes disconnected or plugged between the power venter and the water heater vent
connection, the flue products will spill out of the draft hood relief opening, heat up the spill switch temperature disc
and cause the contacts to open and interrupt the millivolt circuit to the gas valve and stop all gas flow. If the power
venter blower fails to operate, the pressure switch contacts will not close and the burners remain off. If the pilot
becomes extinguished, the thermopile stops generating millivolt power and the gas valves remain closed until the pilot
is relit.
4. When the aquastat is satisfied, the contacts open and stop the power venter, causing the power to be interrupted to
the ignition module and gas valve, and the flue damper closes.
INSTALLATION SAFETY INSTRUCTIONS
CAUTION: This device must be installed by a qualified installer in accordance with the
manufacturer's installation instructions. Appliances should have a minimum of 75%
combustion efficiency or have a maximum measured flue gas temperature of 550EF at the
inlet of the power venter.
1. The power venting system must be installed by a qualified installer. "Qualified Installer"
shall mean an individual who has been properly trained or is a licensed installer. The in-
staller must write or imprint his name, phone number and date of installation on the
installation tag. The tag should be attached to the system control kit box or power
venter unit. Also, the included adhesive "Warning!" label should be attached to the
Control Kit box, as shown in Figure 1, and the installers name be written on it. Recording burner and venting system
initial operational information is strongly recommended as a guide for service or burner tune-up. Enter this on the back
page of this manual. The appropriate wiring diagram for the type of controls on the water heater must be affixed to the
water heater jacket upon completion of the installation.
24 V
C
(CK-41 C
OLT
ONTROLS
C
(CK-81 C
ILLIVOLT
ONTROLS
K
)
ONTROL
IT
K
)
ONTROL
IT
Page 2
Figure 1
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