User Manual

ManualsBrandsHydrolevel ManualsAccessories for waterCG470 Series

1/4"

Automatically shuts off burner, after delay, in a low water

condition to prevent dry firing.

Enhanced Intermittent Level Test technology – active only

when water is at boiling temperature. Provides added protec-

tion in foaming and volatile water conditions.

Time delay sequencing prevents burner short-cycling caused

by momentary dips in water level and allows a water feeder

to replenish water to a level above the probe.

Integral temperature sensor provides High Limit Lock-Out

feature for an unprecedented level of boiler protection.

The probe may be

installed in the boiler

above the lowest safe

water level established by

the boiler manufacturer.

Most manufacturers pro-

vide a suitable tapping in

the side of the boiler.

STEP 2 Loosen the two control cover screws and remove the cover.

Assemble the chassis to the probe flange and secure with the screws provided.

STEP 3 Plug the wire lead from the probe into the

mating connection on the circuit board.

STEP 1 Screw the probe

into the LWCO tapping in the boil-

er. Allow 1/4" clearance from the

probe to any boiler surface, tube

or baffle. NOTE: Excessive use of

Teflon tape to seal probe piping

threads may insulate the control

from boiler ground. This could

result in the control not operating.

Low Water Cut-Offs

For Steam Boilers

120 VAC Operating Voltage

Max. Pressure 15 psi

U.S. Patent Nos. 5,739,504 & 6,390,027

CG470 Series

WARNING

Electrical shock hazard. To prevent electrical shock, death or

equipment damage, disconnect power supply before

installing or servicing control. Only qualified personnel may install or service this control in

accordance with local codes and ordinances. Read instructions completely before proceeding.

CAUTION

To prevent serious

burns, boiler

should be thoroughly cooled before installing or

servicing control.

WARNING

Frozen pipes/water damage. Central heating systems are prone to shut down as a result of power or fuel outages,

safety related fault conditions or equipment failure. Installation of freeze protection monitoring or other precautions

is recommended for unattended dwellings in climates subject to sustain below-freezing temperatures.

83 Water Street • New Haven, CT 06511 • Phone (203) 776-0473 • FAX (203) 773-1019 • www.hydrolevel.com

MOUNTING THE CONTROL

SAFE

WATER

LINE

Summary of content (4 pages)

PAGE 1
Automatically shuts off burner, after delay, in a low water condition to prevent dry firing. Enhanced Intermittent Level Test technology – active only when water is at boiling temperature. Provides added protection in foaming and volatile water conditions. Time delay sequencing prevents burner short-cycling caused by momentary dips in water level and allows a water feeder to replenish water to a level above the probe.
PAGE 2
WIRING – Model CG470 1 2 Connect input voltage (120 VAC, 60 HZ) to terminals 1 and 2. 3 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. Optional water feeder connection. Connect feeder N to terminal 2. Connect Feeder H to terminal 1. Connect feeder “FEED” or “W” to terminal A.
PAGE 3
Hi Temp Lock-Out Enhanced Intermittent Level Test Feature To provide added protection to today’s smaller boilers, CycleGard Model CG470 is equipped with an enhanced Intermittent Level Test (ILT) feature. Fifteen minutes after the boiler reaches boiling temperature, the ILT feature removes power from the burner for 60 seconds. During this ILT test, foam dissipates and the water level quickly stabilizes, allowing the CG470 to monitor the true water level in the boiler.
PAGE 4
MAINTENANCE To ensure optimum performance remove and inspect probe annually. Clean any sediment or scale from the probe using a scouring pad or steel wool. Re-install the probe and perform the Operating Test Procedure described on page 3. PROBES EL1230 – STANDARD MODEL – 3/4" NPT EL1232-P – 3/4" NPT The Probe Makes the Difference The probe used in all Hydrolevel controls offers you distinctive advantages.