Hydrolevel 250 Series - Manual (Page 4)

Top of Control
SLIDE MANUAL RESET TOWARD FRONT OF CONTROL TO RESET .
FRONT
The Safgard 250M manual reset incorporates a 90-second time delay that prevents nuisance lockouts. During
temporary low water conditions such as column blow-down, excessive surge or slow condensate return, the burner
will shut down immediately but will not lock out for 90 seconds. The burner will restart automatically if the water
returns to a safe level within 90 seconds. The manual reset does not require resetting after a power failure.
Likewise, power interruptions will not reset the manual reset once engaged. With the Safgard manual reset design,
a genuine low water condition must be detected before reset is actuated and the only procedure for resetting a
tripped reset involves operator contact.
MANUAL RESET FEATURE (Model 250M)
CAUTION!- Blow down valve should be piped to a proper drain connection to avoid exposure to
steam discharge. Severe injury could result from failure to follow these instructions.
Blow down the 250 Series control when the water level is at its normal operating level (between middle and upper
probe) - with the the burner on.
Slowly open the column blow-down valve. The water level should begin to drop in the site glass. When water falls below
the middle probe, the pump or valve should energize. Continue draining the blow down column until water has fallen
below the bottom probe. Boiler should shut down immediately. Close the blow-down valve. Water should begin to rise
in the site glass. The burner should refire after covering the bottom probe and water should continue to rise in the site
glass. When water reaches the top probe the burner should continue to fire and the pump or valve should de-energize.
If the control fails to react as described above recheck wiring and/or probes for sludge or sediment buildup.
In addition to the blow-down and test procedure above, the probes should be removed and examined annually. The
probes can usually be cleaned with a soft cloth although they are rugged enough to be cleaned with steel wool or a
scouring pad if a more crystaline or solid buildup is present. Probes should be inspected and cleaned more often on
systems with high make-up water or untreated boiler water.
MANUAL
RESET
BUTTON
BLOW-DOWN & TEST PROCEDURE
MAINTENANCE
LIMITED MANUFACTURER’S WARRANTY
We warrant products manufactured by
Hydrolevel Company to be free from defects
in material and workmanship for a period of
two years from the date of manufacture or
one year from the date of installation,
whichever occurs first. In the event of any
claim under this warranty or otherwise with
respect to our products which is made within
such period, we will, at our option, repair or
replace such products or refund the purchase
price paid to us by you for such products .
In no event shall Hydrolevel Company be liable
for any other loss or damage, whether direct,
indirect, incidental or consequential. This
warranty is your EXCLUSIVE remedy and shall
be IN PLACE OF any other warranty or
guarantee, express or implied, including, without
limitation, any warranty of MERCHANTIBILITY
or fitness for a particular purpose. This warranty
may not be assigned or transferred and any
unauthorized transfer or assignment thereof
shall be void and of no force or effect.
www.hydrolevel.com
P.O. Box 1847
New Haven, CT 06508
Phone: (203) 776-0473
Fax: (203) 773-1019