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Model 1100M
Low Water Cut-Off
For Residential
24 VAC Operating Voltage
Hot Water Boilers
Step
The Safgard 1100M must be installed at or above the
Determine Mounting Location
minimum safe water level established by the boiler
manufacturer. The 1100M can be installed directly
into the boiler if a suitable tapping is available
The 1100M can also be installed in the boiler piping
using a standard 3/4" tee
Note: When installing in piping, select a location
close to the boiler to ensure the 4' wiring harness will
reach the 24-Volt transformer. The cut-off should be
installed on the boiler side of the circulator or shut-off
valves.
IMPORTANT: Check for adequate clearance
(minimum 1/4") from metal probe sensor to any
surface inside the boiler or pipe.
Do not install in a location that could hold or trap
water in the event of a low water condition.
W RNING
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.
W RNING
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.
126 Bailey Road, North Haven, CT 06473 • Phone (203) 776-0473 • F X (203) 764-1711 •
• TEST BUTTON FOR EASY DIAGNOSTICS
• MANUAL RESET LOCKOUT PROTECTION –
MEETS CSD-1 REQUIREMENTS
• POWER AND LOW WATER INDICATORS
• MOLEX CONNECTOR FOR EASY WIRING
• COMPACT SIZE ALLOWS FOR MOUNTING IN TIGHT SPACES
.
.
Step
Step
Step
C UTION
should be thoroughly cooled before installing or
servicing control.
1
Apply Teflon
tape to
®
the threads of the
Model 1100M. Do
not use pipe dope or
other pipe sealants.
Hand tighten the
control into boiler
tapping or pipe tee.
Be careful not to
cross thread.
Note: Do not use a
wrench. Hand tight-
en only.
Plug wire harness
into connector on
face of control.
To prevent serious
burns, boiler
www.hydrolevel. om
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Related Manuals for safgard 1100M
Summary of Contents for safgard 1100M
- Page 1 Be careful not to cross thread. Note: Do not use a The Safgard 1100M must be installed at or above the Determine Mounting Location wrench. Hand tight- minimum safe water level established by the boiler en only.
- Page 2 R. WIRING TO AN AQUASTAT For boilers equipped with a Honeywell Model L8148E or L8124E Aquastat. Safgard Model 1100M is not to be used with Model L8148C or L8124C. Safgard Model 550 should be used for oil-fired boilers.
- Page 3 Cut-off the connectors and strip the ends of the two former (R). Connect WHITE wire to common side of yellow wires of the Model 1100M harness. Break into 24 Volt boiler transformer (C). Connect the GREEN the burner circuit between the hot side of the trans- former (R) and other limit controls.
- Page 4 IMPORTANT: Do not run boiler unattended until the following procedure is completed 1. Before raising the water level above the Model 1100M, turn on power to the boiler and set the thermostat to call for heat. Both the green “POWER” LED and amber “LOW WATER” LED should illuminate. The burner should not fire. IMPORTANT: If the burner fires with no water at the probe, immediately shut down power to the boiler and refer to the Trouble Shooting instructions below.