Leonard MEGATRON 270 Guide

Bulletin M-270/370
August, 2018
1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: [phone] Fax: [phone]
Email: [email protected]
Web Site: http://www.leonardvalve.com
MEGATRON®MODEL 270/370
MODEL 270-LF, 370-370-LF
SYSTEMS
1. Megatron 270/370 systems is factory pre-assembled and
tested System should be installed at a location where it can
easily be cleaned, adjusted or repaired.
2. System supplies must be connected as shown (Hot-left,
Cold-right). Exercise caution when soldering.
4. Flush pipes thoroughly after system has been connected.
5. Refer to page 4 of this bulletin for correct Setup
Instructions.
INSTALLATION
Maximum Operating Pressure 125PSI (860 KPA) for Hot and Cold Water.
! CAUTION !
All thermostatic water mixing valves have limitations. They will not provide the desired accuracy outside of
their flow capacity range. Consult the capacity chart on page 4.
100
120
30
R
80
20
50
60
LEONARD 40
40
0
20
-10
10
60
140
°F
0
°C
20
40
120
-10
140
60
°C
°F
0
100
80
60
50
R
LEONARD
0
10 30
20
40
20
40
120
-10
140
60
°C
°F
0
100
80
60
50
R
LEONARD
0
10 30
20
40
100
120
30
R
80
20
50
60
LEONARD 40
40
0
20
-10
10
60
140
°F
0
°C
HOT
INLET INLET
COLD
CONNECTION
TEST/SETUP
OUTLET
WATER SOURCE
TO HOT
RETURN LINE
NOTE: NOT TO BE USED FOR
EYEWASH APPLICATIONS
!WARNING: This product can expose you to
chemicals including lead, which is known to the State
of California to cause cancer. For more information, go
to www.P65Warnings.Ca.gov

ADJUSTMENTAND SERVICE
TEMPERATURE ADJUSTMENT
1. Open hot and cold water supply valves to mixing valve.
2. Open mixed water outlet.
3. With the fixture in the full open position, calibrate the
mixed water outlet temperature by placing a thermometer
in the mixed water stream. Loosen knob set screw with
5/64” allen wrench. Adjust the setting of the valve to
obtain the desired temperature (counterclockwise, to
increase temperature-clockwise to decrease temperature.)
4. Tighten knob set screw to lock temperature setting.
WARNING
WARNING! This thermostatic mixing valve’s
temperature setting MUST be checked. If the
temperature is too high (above 110ºF, 43ºC), the
temperature knob must be adjusted immediately.
Excessively hot water is DANGEROUS AND MAY
CAUSE SCALDING!!
PRESSURE-TEMPERATURE:
Minimum Flow:0.5 GPM (1.9 l/Min)
Maximum Pressure:125 PSI (8.6 BAR)
Maximum Hot Water temperature: 200F- (93°C)
Approach Temperature 5°F (2.8°C) above set
point.
TROUBLESHOOTING INSTRUCTIONS
GASKET KIT Leaking water under knob.
Leaking water between valve cover and body. GASKET KIT
Model 270 1/WX
Model 370 1/WX
REBUILDING KIT Valve will not control temperature after
cleaning. REBUILDING KIT Model 270 R/270/370
Model 370 R/270/370
CHECKSTOP KIT Hot water by-pass into cold line.
Cold water by-pass into hot line. CHECK KIT
Model 270 4/220
Model 370 4/320
SEE PAGE 3 FOR COMPLETE PARTS BREAKDOWN
SEE PAGE 4 FOR PIPING IN RECIRCULATED OR NON-RECIRCULATED WATER SYSTEMS
IMPORTANT!! THIS IS A CONTROL SYSTEM WHICH MUST BE CLEANED AND MAINTAINED ON A
REGULAR BASIS (SEE MAINTENANCE GUIDE AND RECORD MGR-1001).
1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: [phone] Fax: [phone]
Email: [email protected]
WEB: http://www.leonardvalve.com 2
27 30
9
34
6.5 7.5 8.5
4038 43
11.510.5
40 43 47
10.510
45 L\MIN
L\MIN
49
13 GPM
12 GPM
30
2.1
PRESSURE DROP
1.71.0 1.4
15 20 25
2.82.4 3.1
35 40 45
3.4 BAR
50 PSI
370
270
3/4" 3/4"
1/2" 1/2" 210.95 13
0.5
1.9
64
15 23
3.50.25 5.5
MODEL
MINIMUM
IN OUT .7
.3
L\MIN
FLOW
(GPM) 510
11.5
12.5
36
9.5
38
10
3225 28
87

VALVE PARTS LIST
DISMANTLING & CLEANING TROUBLESHOOTING
1. Shut off hot and cold water to the valve as well as the valve
outlet port.
2. Loosen lock screw on side of knob with 5/64” allen wrench.
3. Remove the knob screw on top of knob.
4. Remove temperature adjustment knob.
5. Remove valve cover, which includes the stem assembly.
6. The shuttle assembly can now be removed, cleaned and
inspected. Be sure to check the condition of the shuttle o-ring
and replace if necessary.
7. Lubricate the shuttle o-ring before installing the shuttle
assembly.
8. Install the cover assembly including o-ring back onto valve
and tighten.
9. Replace knob and knob screw.
10. Valve temperature must be reset after any repairs or
cleaning!! See Page 2. Temperature Adjustment
1. Leaking water under knob, order gasket kit, replace stem
assembly o-ring. Remove knob screw and knob, remove
retaining clip, thread out the stem assembly and replace o-ring.
Lubricate o-ring, thread stem into cover, replace retaining ring,
knob and screw. Valve temperature must be reset after any
repairs or cleaning!! See page 2.
2. Leaking water between cover and body, order gasket kit,
replace cover o-ring. Remove knob screw and knob and remove
valve cover and replace o-ring. Replace valve cover, knob and
knob screw. Valve temperature must be reset after any
repairs or cleaning!! See page 2.
3. Hot water bypass into cold line, order checkstop kit and replace
checks within inlets of valve.
4. Valve not controlling temperature even after cleaning, order
complete rebuild kit. Remove knob screw and knob and remove
valve cover. Replace shuttle assembly and return spring being
sure to lubricate shuttle o-ring. Replace valve cover, knob and
knob screw. Valve temperature must be reset after any
repairs or cleaning!! See page 2.
1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: [phone] Fax: [phone]
Email: [email protected]
WEB: http://www.leonardvalve.com 3
MODEL270, 370
RETURN SPRING
CHECK
CHECK CLIP (MODEL 270/370 ONLY)
SHUTTLEASSEMBLY
SHUTTLE O'RING
STEM ASSEMBLY
STEM ASSEMBLY O'RING COVER O'RING
COVER
RETAINING CLIP
KNOB
SCREW
KNOB SET SCREW
DIAL PLATE
DO NOT REMOVE
SNAP RING ON
STEM - INJURY MAY
OCCUR
MODEL 270
1/ WX Gasket Kit
Shuttle o’ring
Stem assembly o’ring
Cover o’ring
R/ 270/370 Complete Rebuild Kit
Return spring
Shuttle assembly
Shuttle o’ring
Stem assembly o’ring
Cover o’ring
4/220 Check valve Kit
2 Check valves
2 Check clips
MODEL 370
1/ WX Gasket Kit
Shuttle o’ring
Stem assembly o’ring
Cover o’ring
R/ 270/370 Complete Rebuild Kit
Return spring
Shuttle assembly
Shuttle o’ring
Stem assembly o’ring
Cover o’ring
4/320 Check valve Kit
2 Check valves
2 Check clips

1360 Elmwood Avenue, Cranston, RI 02910 USA
Phone: [phone] Fax: [phone]
Email: [email protected]
WEB: http://www.leonardvalve.com 4
© 2018 Leonard Valve Company
Printed in USA
REQUIRED METHOD OF PIPING
(RECIRCULATED DOMESTIC WATER SYSTEMS)
THIS PIPING METHOD IS NOT TO BE USED FOR MORE THAN ONE BUILDING
PROCEDURE TO BALANCE RECIRCULATION SYSTEM
1. ADJUST THE BALANCING VALVE TO FULL OPEN, TURN THE RECIRCULATION PUMP OFF AND FLOW WATER BY
EITHER USING FIXTURES OR BY USING THE TEST CONNECTION.
2. ADJUST THE VALVE HANDLE TO THE APPROPRIATE TEMPERATURE.
3. CLOSE THE FIXTURES AND / OR TEST CONNECTION, TURN ON THE RECIRCULATION PUMP.
4. OBSERVE THE TEMPERATURE, IF THE TEMPERATURE REMAINS AT THE SET POINT SET UP IS COMPLETE. IF THE
TEMPERATURE INCREASES CLOSE DOWN THE BALANCING VALVE SLOWLY UNTIL IT RETURNS TO SET POINT.
LIMITED WARRANTY
Leonard Valve Company (hereinafter, “Leonard”) warrants the original purchaser that products manufactured by Leonard will be free from
defects in material or workmanship under normal conditions of use, when properly installed and maintained in accordance with Leonard’s
instructions, for a period of one year from the date of shipment. During this period, Leonard will at its option repair or replace any product, or
part thereof, which shall be returned, freight prepaid, to the Leonard factory and determined by Leonard to be defective in materials or
workmanship. Leonard provides no warranty, express or implied, which extends beyond the description contained herein. LEONARD
SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A
PARTICULAR PURPOSE. Nonetheless, some jurisdictions may not allow the disclaimer of certain implied warranties, in which case Leonard
hereby limits such implied warranties to the duration of the limited warranty period contained herein. Some jurisdictions may not allow
limitations on how long an implied warranty lasts, so the foregoing durational limitation may not apply to you. In no event will Leonard be liable
for labor or incidental or consequential damages. Any alteration or improper installation or use of this product will void this limited warranty. If
any provision of this limited warranty is prohibited by law in the applicable jurisdiction, such provision shall be null and void, but the remainder
of this limited warranty shall continue in full force and effect.
100
120
30
80
20
50
60
LEONARD 40
40
0
20
-10
10
60
140
°F
0
°C
20
40
120
-10
140
60
°C
°F
0
100
80
60
50
LEONARD
0
10 30
20
40
20
40
120
-10
140
60
°C
°F
0
100
80
60
50
LEONARD
0
10 30
20
40
100
120
30
80
20
50
60
LEONARD 40
40
0
20
-10
10
60
140
°F
0
°C
HEAT
TRAP
COLD SUPPLY
SOURCE
WATER
HOT
HIGH
TEMP.
WATER
DOMESTIC TEMPERED
WATER
VALVE
BALANCING
HIGH TEMPERATURE
RECIRCULATED WATER
DOMESTIC RECIRCULATED WATER