Xylem MM 705D No. 11, 11M and 11MV Replacement Switch for use on Series 61, 64, 764, 67, 767, 69 and 70 Low Water Cut-Offs - Manual

INSTRUCTION MANUAL
• Before using this product read and understand instructions.
• Save these instructions for future reference.
• All work must be performed by qualified personnel trained in the proper
application, installation, and maintenance of plumbing, steam, and electrical
equipment and/or systems in accordance with all applicable codes and
ordinances.
• To prevent electrical shock, turn off the electrical power before making
electrical connections.
• The low water cut-off switch must be installed in series with all other limit
and operating controls installed on the boiler. After installation, check for
proper operation of all of the limit and operating controls, before leaving
the site.
• We recommend that secondary (redundant) Low Water Cut-Off controls be
installed on all steam boilers with heat input greater than 400,000
BTU/hour or operating above 15 psi steam pressure. At least two controls
should be connected in series with the burner control circuit to provide
safety redundancy protection should the boiler experience a low-water
condition. Moreover, at each annual outage, the low water cutoffs should
be dismantled, inspected, cleaned, and checked for proper calibration and
performance.
• To prevent serious personal injury from steam and hot water make sure
there is a discharge line from the blow down valve to a proper place of
disposal.
• To prevent a fire,do not use this low water cut-off to switch currents over
7.2A, 1/3 HP at 120 VAC or 3.6A, 1/3 HP at 240 VAC, unless a starter or
relay is used in conjunction with it.
!
WARNING
No. 11, 11M and 11MV
Replacement Switch
For use on Series 61, 64, 764, 67,
767, 69 and 70 Low Water Cut-Offs
11
General Purpose (BLACK terminal panel)
11M Manual Reset Option (BLACK terminal panel)
11MV Millivolt / 24V Option (RED terminal panel)
Electrical Ratings
Motor Switch Rating
(Amperes)
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 120 VA at
240 VAC 120 or 240 VAC
NOTE: 11MV is rated at 24VA @ 24 VAC to 120 VAC
MM-705D
California Proposition 65 warning! This product contains chemicals known
to the state of California to cause cancer and birth defects or other
reproductive harm.
Previous controls should never be installed on a new system. Always
install new controls on a new boiler or system
•
•
Failure to follow this warning could cause property damage, personal
injury or death.
CAUTION:
A more frequent replacement interval may be necessary based on the con-
dition of the unit at time of inspection. McDonnell & Miller's warranty is one
(1) year from date of installation or two (2) years from the date of manufacture.
7.4 44.4
3.7 22.2
•