Install Instructions

MODEL CGT450 (for boilers with tankless coil)
HOW TO WIRE
Connect input voltage (120 VAC,
60 HZ) to terminals 1 and 2.
Connect input voltage (120 VAC, 60 HZ) to termi-
nals 1 and 2.
Optional water feeder connection. Connect feeder
N to terminal 2. Connect Feeder H to terminal 1.
Connect feeder “FEED” or “W” to terminal A. For
water feeders with 2 leads, connect feeder neutral
to terminal 2 and feeder hot to terminal A.
Note: Use of a solenoid valve or McDonnell & Miller
Model 101A water feeder may cause flooding and
is not recommended for use with this low water
cut-off.
FACTORY
INSTALLED
JUMPER.
DO NOT
REMOVE
MODEL CG450
Connect terminal 2 to burner circuit
neutral. Connect terminal P2 to burner
Circuit in series with other limit con-
trols. Consult boiler manufacturer
instructions for proper terminal con-
nections. Control should be wired in
series with and before other limit con-
trols.
Connect terminal 2 to burner circuit neutral.
Connect terminal P2 to burner Circuit in series with
other limit controls. Consult boiler manufacturer
instructions for proper terminal connections.
Control should be wired in series with and before
other limit controls.
Connect “LOW LIMIT” terminals on CycleGard con-
trol to the terminals on the tankless aquastat.
Connect”THERMOSTAT” terminals on CycleGard
control to T-T terminals on burner primary control.
Optional water feeder connection.
Connect feeder N to terminal 2.
Connect Feeder H to terminal 1.
Connect feeder “FEED” or “W” to ter-
minal A. For water feeders with
2 leads, connect feeder neutral
to terminal 2 and feeder hot to termi-
nal A. Note: Use of a solenoid valve or
McDonnell & Miller Model 101A water
feeder may cause flooding and is not
recommended for use with this low
water cut-off.
Connect “BURNER” terminal on the
CycleGard control to the orange burn-
er wire (120VAC) located under the oil
burner transformer.
See opposite page for schematic wir-
ing diagram and additional
SmartCycle description.
1
1 2 3
4 5 6
2
BURNER
POWER
SOURCE
120V AC
+ 0
LIMIT
CONTROLS
AP2P112
BURNER
WATER
FEEDER
3 4
OPTIONAL
ACTIVATION
Connect “BURNER” terminal on the CycleGard con-
trol to the orange burner wire (120VAC) located
under the oil burner transformer. See opposite
page for schematic wiring diagram and additional
SmartCycle description.
OPTIONAL ACTIVATION