Instructions / Assembly

Step 3 Wiring Select the wiring diagram  through  below that corresponds to the
low water cut-off installed on the boiler.
Consult boiler manufacturer’s instructions for proper burner terminal connections.
Note: If there is no jumper installed on the low water cut-off
between 1 and P1, see ALTERNATE WIRING box.
Note: If there is no jumper installed on the low water cut-off
between H and C, see ALTERNATE WIRING box.
Note: If there is no jumper installed on the low water cut-off
between H and P1, see ALTERNATE WIRING box.
Note: If there is no jumper installed on the low water cut-off
between 1 and 3, see ALTERNATE WIRING box.

Safgard Model 450 / CycleGard CG450
STANDARD WIRING

PS-800 Series – Newer Models
STANDARD WIRING

PS-800 Series – Older Models
STANDARD WIRING

Safgard Model OEM-170TD
STANDARD WIRING
IMPORTANT
To prevent over-feed-
ing and possible
flooding, when used
with the OEM-170TD,
the VXT should be set
with a Feed Delay of
10 minutes and a
Feed Amount of 1 to 5
gallons (see step 5).
DO NOT USE LWCO
SETTING.
ALTERNATE WIRING
Safgard & CycleGard Models:
If there is no jumper installed between terminals 1 and P1 on the low cut-off
(between H and P1 on Model OEM-170TD), then the cut-off is powered by a
separate power source from the burner circuit and the following wiring must
be used:
➀
Connect a wire from the FEED terminal on the feeder to the A
terminal on the cut-off.
➁
Connect a wire from terminal H on the feeder to
the burner circuit hot.
➂
Connect a wire from terminal N on the feeder to
burner circuit neutral.
ALTERNATE WIRING
PS-800 Series:
If there is no jumper installed between terminals H and C on the low water
cut-off (terminals 1 and 3 on older models), then the cut-off is powered by a
separate power source from the burner circuit and the following wiring must
be used:
➀
Connect a wire from the FEED terminal on the feeder to the W
(4 on older models) terminal on the cut-off.
➁
Connect a wire from terminal
H on the feeder to the burner circuit hot.
➂
Connect a wire from terminal N
on the feeder to burner circuit neutral.

Using a separate power source for the feeder

Model RW-700 Guard Ring

Using the burner circuit to power the feeder
Hydrolevel McDonnell & Miller
Float Style Control Honeywell