30-Second
2-Minute
(Factory Setting)
4-Minute
6-Minute
8-Minute
10-Minute
The feed delay feature is designed to prevent boiler flooding by allowing time for condensate to return to the boiler prior to feed-
ing. If the returns and vents are in good condition, the 2-minute factory setting is usually sufficient. If for any reason condensate
takes longer to return to the boiler (such as old return lines or long horizontal runs), a longer delay setting should be selected.
NOTE: SELECT ONLY ONE DIPSWITCH CORRESPONDING TO THE DESIRED FEED DELAY.
LWCO
(Factory Setting)
1-Gallon
2-Gallon
3-Gallon
4-Gallon
5-Gallon
LWCO Setting:
The VXT feeder is shipped in the LWCO feed setting. When operating in this setting, the VXT will feed only
until the low water cut-off re-energizes the burner circuit (or a maximum of 5 gallons). This will restore boiler operation, but on
some applications may only be enough water to satisfy the
minimum
requirements. If additional water is needed to reach the
boiler’s
normal
operating level, the 1-Gallon to 5-Gallon settings should be selected using the instructions below.
DO NOT USE LWCO SETTING WITH SAFGARD MODEL OEM-170TD.
1 Gallon to 5 Gallon Settings:
When the 1 to 5 Gallon settings are used, the feeder will continue to feed until the cycle is
complete, regardless of when the low water cut-off is satisfied. These settings should be used only when the LWCO setting
does not provide adequate water to restore the boiler to a
normal
operating level. Use the following instructions when choosing
these settings:
Boilers with probe-type cut-offs:
1. With power to the system on and the thermostat off, lower
the water level to approximately 1/2" below the probe.
2. Press the FEED button on the water feeder and, using a
watch with a second hand, time how long it takes boiler
water to reach the
normal
operating level (Usually the
middle of the gauge glass unless otherwise specified by
the boiler manufacturer).
3. Round the time to the nearest minute and set the feeder
for the corresponding number of gallons.
Example:
If it takes 1 minute and 15 seconds for water to
rise from 1/2" below the probe to the normal operating
level, round to 1 minute and set the feeder for 1-Gallon.
4. Once the Feed Amount has been set, perform a test cycle
by lowering the water a second time (following procedures
in Step 1 above) and allowing the feeder to replenish the
water automatically.
Boilers with float-type cut-offs:
1. With power to the system on and the thermostat off, lower
the water level until 1/4" is visible in the gauge glass.
2. Press the FEED button on the water feeder and, using a
watch with a second hand, time how long it takes boiler
water to reach the
normal
operating level (Usually the
middle of the gauge glass unless otherwise specified by
the boiler manufacturer).
3. Round the time to the nearest minute and set the feeder
for the corresponding number of gallons.
Example:
If it takes 2 minutes and 10 seconds for
water to rise from 1/4" in the gauge glass to the normal
operating level, round to 2 minutes and set the feeder for
2-Gallons.
4. Once the Feed Amount has been set, perform a test cycle
by lowering the water a second time (following procedures
in Step 1 above) and allowing the feeder to replenish the
water automatically.
NOTE: SELECT ONLY ONE DIPSWITCH CORRESPONDING TO THE DESIRED FEED AMOUNT.
CAUTION: BOILER FLOODING CAN OCCUR IF THE FEEDER IS NOT SET PROPERLY.
UNLIKE OTHER FEEDERS, THE 1-GALLON TO 5-GALLON SETTINGS WILL FEED THE FULL
CYCLE REGARDLESS OF WHEN THE WATER REACHES THE LOW WATER CUT-OFF.
Step 4
Set the Feed Delay
Step 5
Set the Feed Amount
Step 6
Attach Service Tag
Complete the information at the top of the service tag provided and attach tag near the VXT Water Feeder.
