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DRIVING
STUD

M20-14B

ASSEMBLY

PORT SLEEVE

POINTER ROD NUT

M20-3B

M20-1B

BRIDGE

P.S. PACKING

(2 REQ'D)

(2 REQ'D)

HOLDER NUT O'RING

M20-6B

(2 REQ'D)

BRIDGE ASSEMBLY

M-20-1-8B

POINTER

7628

MU-4C

GLAND PACKING

57-D(RF)

GLAND NUT

M20-4B

P.S. HOLDER NUT

M20-5B

(2 REQ'D)

P.S. HOLDER

(2 REQ'D)

M20-G1

THERMOSTAT GROUP

COVER

GASKET

DURA-trol

M20-G2

R

MU-10B

M20-3C

M20-1C(RF)(CP)

COVER

LTR SET SCREW

6910

POINTER SCREW

7520

M20-2C

COVER

SCREWS

CHECKSTOP PARTS

REPAIR KITS

REPAIR KIT 4/M20 REBUILDING KIT

REPAIR KIT R/M20 REBUILDING KIT

STEM O'RING

MU-5A UPPER

M20-6A

LOWER STEM

& PKG. (2 EACH)

REPAIR KIT 1/M20 PACKINGS & GASKETS

LOWER STEM

& PACKING

SPRING

M20-9A

M20-6A

M20-3C
COVER

GASKET

2 EACH:

BONNET PKG.

MU-4C

GLAND PKG.

(2 EACH)

(2 EACH)

M20-3A

(2 EACH)

M20-9A

SPRING

GASKET

COVER

M20-3C

BONNET PKG.

CONTROL ASSEMBLY

M20-3A

THERMOSTATIC

M20-1-12B

(2 EACH)

M20-6B

HOLDER NUT

O'RING (2 EACH)

MU-5A

O'RING

REPAIR KIT 2/M20 PORT SLEEVE KIT

M20-G1

PORT

SLEEVE ASSY.

HOLDER NUT

M20-6B

0'RING (2 EACH)

(2 EACH)

M20-3B

P.S. PACKING

REMEMBER! 

THIS IS A CONTROL DEVICE WHICH MUST BE 

CLEANED AND MAINTAINED ON A REGULAR BASIS (SEE 
MAINTENANCE GUIDE AND RECORD, MGR-1000).

NOTE:

AFTER INSTALLING NEW PARTS IT WILL BE 

NECESSARY TO RESET THE ADJUSTABLE HIGH 
TEMPERATURE LIMIT STOP ON EACH VALVE (SEE PAGE 2).

7

MU-5A UPPER

CHECKSTOPS

STEM PKG.

M20-3A BONNET

PACKING

AND PACKING

UPPER STEM

CHECK SPRING

M20-6A LOWER

STEM & PACKING

M20-9A

CHECK BONNET

M20-2A RF/CP

MU-4A 

TM1520A SMALL VALVE PARTS

Summary of Contents for MEGATRON 7N

Page 1: ...r 2 System should be installed at a location where it can easily be cleaned adjusted or repaired 3 System supplies must be connected as shown Hot left Cold right Exercise caution when soldering 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...

Page 2: ...est this temperature by holding a thermometer under the flow of water to be certain it is as desired LIMIT STOP MUST BE RESET AND RECHECKED EACH TIME HANDLE IS REMOVED POINTER SET SCREW SNAP CAP LTR C H THERMOSTATIC LEONARD STOP SCREW IMPORTANT ALL MIXING VALVES MUST BE SET AT THE SAME OPERATING TEMPERATURE SEE PAGES 6 7 FOR COMPLETE PARTS BREAKDOWN Check for significant variations in outlet flow ...

Page 3: ...e piped according to a Leonard Required Piping Method 5 see page 4 2 Make sure full hot and cold supplies to this assembly are operating The temperature of the hot water source must be properly set and maintained 3 The circulator if used must be turned OFF before setup 4 Turn on enough fixtures for a flow of at least 30 GPM 114 l min downstream from this system Make sure each fixture is set to del...

Page 4: ... 8 ETC UNTIL DESIRED TEMPERATURE IS ACHIEVED REMEMBER THIS IS A CONTROL DEVICE WHICH MUST BE CLEANED AND MAINTAINED ON A REGULAR BASIS SEE MAINTENANCE GUIDE AND RECORD MGR 1000 4 LEONARD VALVE CO CRANSTON RI USA TYP TM 20 40 F 0 140 30 100 20 60 LE O NARD 10 C 0 10 50 120 40 60 80 LEONARD VALVE CO CRANSTON RI USA TYP TM ISOLATION VALVE VALVE CHECK SYSTEM FIXTURES HOT WATER SOURCE COLD SUPPLY HEAT ...

Page 5: ...e cleaning solution DO NOT USE ABRASIVES Be certain thimble moves freely on the port sleeve Note Driving stud M20 14B must engage slot in thimble when reassembling 6 To clean thermostat coil remove retaining ring and stop loosen gland nut Push rod through cover Be careful not to pull coil out of shape 7 Clean with a non corrosive cleaning solution DO NOT USE ABRASIVES INSTRUCTIONS FOR SERVICING LA...

Page 6: ...ARY TO RESET THE ADJUSTABLE HIGH TEMPERATURE LIMIT STOP ON EACH VALVE SEE PAGE 2 REPAIR KITS 6 04 125 SPRING LOWER STEM PACKING SWIVEL SWIVEL NUT 010 TM 02 BONNET STRAINER CAP 06 014 CAP PACKING 013 MU 5A SCREEN 1529 UPPER STEM 03 05 BONNET PACKING YELLOW O RING 09 125 TM21 125 TM21 125 2 EA 03 LOWER STEM PACKING COIL SLEEVE TM 8 STUD 03 PACKING LOWER STEM 2 EA 014 CAP PACKING CAP PACKING SPRING 1...

Page 7: ...ACKING SPRING M20 9A M20 6A M20 3C COVER GASKET 2 EACH BONNET PKG MU 4C GLAND PKG 2 EACH 2 EACH M20 3A 2 EACH M20 9A SPRING GASKET COVER M20 3C BONNET PKG CONTROL ASSEMBLY M20 3A THERMOSTATIC M20 1 12B 2 EACH M20 6B HOLDER NUT O RING 2 EACH MU 5A O RING REPAIR KIT 2 M20 PORT SLEEVE KIT M20 G1 PORT SLEEVE ASSY HOLDER NUT M20 6B 0 RING 2 EACH 2 EACH M20 3B P S PACKING REMEMBER THIS IS A CONTROL DEVI...

Page 8: ... REGULAR BASIS SEE MAINTENANCE GUIDE AND RECORD NOTE AFTER INSTALLING NEW PARTS IT WILL BE NECESSARY TO RESET THE ADJUSTABLE HIGH TEMPERATURE LIMIT STOP ON EACH VALVE SEE PAGE 2 CHECKSTOP PARTS REPAIR KITS MU 4A RF MU 5A UPPER CHECKSTOPS STEM PKG M20 3A BONNET PACKING AND PACKING UPPER STEM CHECK SPRING M20 6A LOWER STEM PACKING M20 9A CHECK BONNET M20 2A RF 8 TM1520A SMALL VALVE PARTS DRIVING STU...

Page 9: ...onard 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...

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