Manual

ManualsBrandsXylem ManualsPumpsMM 214E Series 61 Low Water Cut-Off

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, instal-

lation, and maintenance of plumbing, steam, and electrical equipment and/or systems in

accordance with all applicable codes and ordinances.

• To prevent serious burns, the boiler must be cooled to 80˚F (27˚C) and the pressure must be

0 psi (0 bar) before servicing.

• To prevent electrical shock, turn off the electrical power before making electrical connections.

• This low water cut-off 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 of

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 blow down, connect a drain pipe to the control

opening to avoid exposure to steam discharge.

• To prevent a fire, do not use this low water cut-off to switch currents over 7.4A, 1/3 Hp at

120 VAC or 3.7A, 1/3 Hp at 240 VAC, unless a starter or relay is used in conjunction with it.

WARNING

CAUTION

WARNING

Series 61

Low Water Cut-Off

CUT-OFF

LEVEL

Model 61

Typical Applications:

- Primary or secondary low water cut-off

for hot water and steam boilers.

- Low water cut-off

- High water cut-off

- Alarm actuator

OPERATION

Maximum Boiler Pressure: 20 psi (1.4 kg/cm

)

Electrical Ratings

Motor Switch Rating (Amperes)

Voltage Full Load Locked Rotor Pilot Duty

125 VA at

120 or 240 VAC

NOTE: 11 MV is rated at 24 VA @ 24VAC to 120 VAC

MM-214(C) 9/5/06 9:40 AM Page 2

MM-214E

120 VAC

7.4

44.4

240 VAC

3.7

22.2

Summary of content (8 pages)

PAGE 1
INSTRUCTION MANUAL MM-214E Series 61 Low Water Cut-Off Typical Applications: - Primary or secondary low water cut-off for hot water and steam boilers. - Low water cut-off - High water cut-off - Alarm actuator CUT-OFF LEVEL OPERATION Maximum Boiler Pressure: 20 psi (1.4 kg/cm2) Model 61 Electrical Ratings Voltage Motor Switch Rating (Amperes) Full Load Locked Rotor 120 VAC 7.4 44.4 240 VAC 3.7 22.
PAGE 2
• 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 inj ury or death. CAUTION: • A more frequent replacement interval may be necessary based on the condition of the unit at time of inspection.
PAGE 3
INSTALLATION – Model 61 – For Hot Water Boilers with 1” (25mm) Equalizing Lines TOOLS NEEDED: One (1) flathead screwdriver and two (2) pipe wrenches. STEP 1 - Determine the Location of the Low Water Cut-Off a. The line on the casting of the model 61 must be installed above the lowest permissible water level determined by the boiler manufacturer. STEP 2 - Installation of the Model 61 For float type controls it is recommended that Test-N-Check® (TC-4) valves be used in the upper and lower equalizing lines.
PAGE 4
TEST-N-CHECK® VALVES Installation of the TC-4 Test-N-Check Valve with a New Low Water Cut-off 1. Assemble the TC-U (the upper Test-N-Check valve, with the vacuum breaker) into the upper equalizing line in place of the cross described in the low water cut-off installation instructions. NOTE: The vacuum breaker must be on the top and the long leg must face the boiler. NOTE: Make sure low water cut-off position is located in accordance with the boiler manufacturer recommended cut-off level. 2.
PAGE 5
Wiring Instructions ! WARNING • To prevent electrical shock, turn off the electrical power before making electrical connections. • This low water cut-off 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.
PAGE 6
Diagram 1 Diagram 2 SCHEMATIC OF TWIN SWITCH INTERNAL OPERATION 10 30 USED AS MAIN LINE SWITCH 02 04 NORMAL WATER LEVEL NEUTRAL WIRE TO BURNER HOT WIRE 10 30 0 0 0 2 4 0 FEEDER OR ALARM OPERATING LEVEL 10 30 SAFETY SWITCH 0 2 4 0 HOT WIRE 1 30 0 2 4 TO ALARM LOW WATER CUT-OFF OPERATING LEVEL NEUTRAL WIRE Diagram 3 Diagram 4 USED AS PILOT SWITCH IN SERIES WITH HOLDING COIL OF AUTOMATIC STARTER TO LINE L1 L2 L3 NO.
PAGE 7
MAINTENANCE SCHEDULE: PROCEDURE: • Blow down control as follows when boiler is in operation: Steam – Daily if operating pressure is above 15 psi. – Weekly if operating pressure is below 15 psi. Hot Water – Quarterly ! CAUTION To prevent serious personal injury from steam pipe blow down, connect a drain pipe to the control opening to avoid exposure to steam discharge. Failure to follow this caution could cause personal injury.
PAGE 8
Xylem 1) The tissue in plants that brings water upward from the roots; 2) a leading global water technology company. We’re 12,500 people unified in a common purpose: creating innovative solutions to meet our world’s water needs. Developing new technologies that will improve the way water is used, conserved, and re-used in the future is central to our work. We move, treat, analyze, and return water to the environment, and we help people use water efficiently, in their homes, buildings, factories and farms.