Install Instructions

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Hydrolevel...

The Safe Choice

for Every Boiler!

Hydrolevel offers a full line of electronic

low water cut-offs, water feeders and liquid

level controls… everything to give you

peace of mind on all

your installations.

Whether it’s hot water or steam, residential

or commercial, Hydrolevel makes the right

control to complete your installation with

safety.

A. Model 550 Low Water Cut-Off for hot water boilers

B. Model 170 Low Water Cut-Off for residential hot

water boilers

C. Model CG450 foam-compensating Low Water Cut-

Off for steam boilers

D. Model VXT-24 Automatic Water Feeder

E. Model 250WC Pump Controller/Low Water Cut-Off.

OPERATIONAL TEST PROCEDURE

Important: Do not run boiler unattended until the following procedure is completed.

1. After wiring is complete and prior to raising the water level above the probe set the thermostat to call for heat. The burner should not fire. IMPORTANT:

If the boiler fires with no water at the probe, immediately shut down the boiler and refer to Trouble Shooting Instructions below.

2. Proceed to fill the system with water. When water reaches probe position burner should fire. If burner does not fire with water at the probe refer to

Trouble Shooting Instructions below.

MAINTENANCE

When installed on a residential hot water heating system, the probe should be removed and cleaned every five years. When installed on a commercial

application, the probe should be removed and cleaned annually. After cleaning the probe, perform the Operational Test Procedure described above.

TROUBLE SHOOTING

IF THE BURNER DOES NOT SHUT DOWN WHEN WATER DROPS BELOW THE PROBE.

1. Remove power immediately and re-check wiring.

2. Remove power and check for adequate clearance from the probe to any surface within the boiler or tee.

IF THE BURNER DOES NOT FIRE.

1. Make sure water is at the probe and probe lead wire is properly secured to probe.

2. Check for proper ground between probe and boiler shell. Excessive use of Teflon tape or sealing compound may insulate the probe from the

boiler shell.

3. Check to insure probe is not surrounded by an air pocket. Slowly loosen, but do not remove, the probe with a wrench. Allow any air to escape.

When water begins to seep past probe threads, retighten probe.

4. Re-check wiring and test for correct incoming voltage.