safgard 550 Series - User Manual

HOT WATER BOILERS: Probe must be installed at or
above the minimum safe water level established by the
boiler manufacturer. The probe may be installed directly
in the boiler (A) if a suitable tapping is available, in the
riser (B), in the header horizontally (C), or in the header
vertically (D). IMPORTANT: To assure proper drainage,
pipe diameter should be no less than 1" on installations
in vertical piping and no less than 1
1
⁄4" on installations in
horizontal piping.
WARNING: To prevent electrical shock or equipment damage, power must be off during installation or servicing of the control. To prevent
serious burns, the boiler should be thoroughly cooled before installing or servicing control. Only qualified personnel may install or service
the control in accordance with local codes and ordinances. Read instructions completely before proceeding.
Loosen the two control box cover bind-
ing head screws and remove the cover.
Slide keyhole slots over probe mounting
screws and tighten screws (with either a
1/4" hex head driver or flat screwdriver.
Connect the ring terminal wire lead to the probe terminal
stud and secure with the lock washer and wing nut provided.
With the power removed, proceed with installation and
wiring according to Method A or B described on next page.
STEAM BOILERS (Secondary) : Control must be installed in a suitable tapping provided in
the boiler(A), or in an equalizing line(B). The control should be located below the level of the
primary low water cut-off but above the lowest permissable water line as specified by the
boiler manufacturer.
Note: For installations in equalizing lines, Hydrolevel recommends the use of Safgard Tees
(see step 2).
Low Water Cut-Offs
550 / 650 / 750 Series
120 VAC Operating Voltage
Automatically shuts off burner in a low water condition to prevent
boiler damage.
Low maintenance. No moving parts to wear stick or hang up, as in
float devices.
Test button (550 & 650 Series) allows the burner circuit and
control to be tested without lowering the water level.
Manual reset feature (550 & 750 Series) will not lock out in power
failures.
1. Where To Install
4. Control Mounting
M
INIMUM
WATER LEVEL
HOT WATER
BOILER
A
B
C
D
SECONDARY
L
WCO
SECONDARY
L
WCO
LOW WATER
CUT-OFF PUMP
C
ONTROLLER
LOW WATER
CUT-OFF PUMP
C
ONTROLLER
TYPICAL STEAM BOILER
INSTALLATIONS
HOT WATER BOILER
INSTALLATIONS
AB
TEE MOUNTING: If a field fabricated tee is used, make sure that the tee drains thor-
oughly when the water level falls below it, and that it conforms to the spacing require-
ments described in Step 3. Models equipped with the shorter EL1214-SV probe can be
installed in most standard reducing tees. Safgard cast iron tees are also available to
accommodate all probe models (See page 4).
2. Tee Options
3. Probe Installation
STANDARD
REDUCING TEE
(SV Models Only)
FOEM-TEE
(160psi)
1214C-2 TEE
(250psi)
FABRICATED TEE
Apply pipe sealing compound to
threads before installing probe.
Teflon tape is not recommended.
Check to insure 1/4" clearance from
probe to any surface or tee.
CAUTION: The probe tip
must extend fully into the
boiler or pipe run. If the
probe is recessed, sedi-
ment can build up and
prevent the low water cut-
off from operating.

Summary

Installation Locations

Hot Water Boiler Installations

Probe placement for hot water boilers, including riser and header options.

Steam Boiler Installations

Secondary LWCO installation for steam boilers below primary LWCO level.

Tee Options and Probe Installation

Tee Types and Mounting

Details on reducing tees, Safgard tees, and probe tip clearance requirements.

Probe Installation Steps

Instructions for applying sealing compound and ensuring probe tip clearance.

Wiring Methods

Wiring Method A: Same Power Source

Connects input voltage to terminals 1 & 2, jumper P1 to P2, and burner circuit.

Wiring Method B: Separate Power Source

Connects input voltage to terminals 1 & 2, P1 to burner power, P2 to burner circuit.

Secondary Cut-Off Wiring and Operation

Wiring Method C: Secondary Cut-Off

Wiring for 550/750 as secondary LWCO, with standard and critical differential options.

750 Series Operation

Manual reset operation: burner fires, shuts off on low water, locks out, requires manual reset.

650 Series Operation

Automatic reset and test button operation: burner fires, test simulates low water, LED lights.

550 Series Operation

Manual reset and test button operation: includes manual reset and test button functions.

Troubleshooting and Maintenance

Burner Not Shutting Down

Check wiring and probe clearance if burner fails to shut off during low water.

Burner Not Firing

Verify probe connection, ground, and voltage if burner does not start.

Red LED Lamp Indication

Red LED signifies lock-out due to prolonged low water; correct cause before resetting.

Annual Probe Inspection

Inspect probe annually, clean scale/build-up, and test control operation.

Fittings, Data, Specifications, and Warranty

Safgard Fittings

Details on FOEM Manifold and 1214C-2 TEE for Safgard probes.

Probe Models and Dimensions

Data for EL1214 standard, EL1214-SV, and EL1214-P probes, including NPT sizes.

Control Specifications

Input voltage, switch ratings, contact type, and alarm circuit details.

Manufacturers Warranty

Two-year warranty on material and workmanship from date of manufacture or installation.

safgard 550 Series Specifications

General

Brand	safgard
Model	550 Series
Category	Plumbing Product
Language	English