Massachusetts - Lochinvar 300 Installation And Operating Manual

Residential gas water heaters
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INSTALLATION GRAPHIC:
COMBINATION SPACE HEATING/POTABLE WATER SYSTEM
If your water heater will be installed in the Commonwealth of Massachusetts, refer to the following
graphic during installation and during modifications to the water supply system.
Refer to your manual for additional requirements.
Some models are not designed to be used with an air handler. Refer to your manual to determine if
the air handler portion of the graphic applies to your model.
Keep this sheet with your manual.
TEMPERED WATER
TO FIXTURES
(MUST MEET TEMPS LISTED
IN MASS. CODE 248 CMR
MUST BE VERTICAL TO
REMOVE A
IR BUBBLES
MIXING VALVE
(MUST BE INSTALLED BELOW
TOP OF WATER HEATER
AS PER MANUFACTURER'S
RECOMMENDATIONS)
WATER HEATER ACCEPTED
BY THE BOARD FOR
INSTALLATION IN

MASSACHUSETTS.

*
MASSACHUSETTS INSTALLATION REQUIREMENTS:
1.) CONNECT ELECTRONICALLY-CONTROLLED TIMER TO AN ALL-BRONZE PUMP. PUMP MUST ACTIVATE EVERY 6 HOURS
FOR 60 SECONDS. TURN PUMP TIMER OFF BEFORE CLOSING PIPING LOOP SHUT-OFF VALVE.
2.) ALL WATER PIPING MUST BE INSTALLED AND INSULATED IN ACCORDANCE WITH MASSACHUSETTS CODE (248 CMR
& 780 CMR).
3.) PIPING LOOP BETWEEN WATER HEATER AND AIR HANDLER MUST BE INSTALLED IN COMPLIANCE WITH 248 CMR.
† REQUIRED FOR MASSACHUSETTS.
‡ PIPING FROM THE TOP OF THE WATER HEATER WITH TEES IS ACCEPTABLE.
8
TYPICAL MIXING VALVE INSTALLATION
COMBINATION SPACE HEATING / POTABLE WATER HEATING SYSTEM
CHECK
VALVE
)
UNION
HOT
WATER
OUT
EXPANSION TANK
VACUUM
RELIEF
VALVE
UNION
TEMP/
PRESSURE
RELIEF
VALVE
HANDLER
SEE
NOTE ‡
SHUT-OFF
VALVE
100'-0" MAXIMUM DISTANCE
FROM WATER HEATER
TO FAN COIL AND BACK
(DEVELOPED LENGTH) NOT
INCLUDING COIL IN HEATING UNIT.
www. lochinvar .com
COLD WATER INLET
CHECK VALVE
SHUT-OFF
(1/8" HOLE
DRILLED IN CLAPPER)
FLOW CONTROL
VA
LV
E
*
PUMP
OUT
COIL
TO
AIR
AIR
HANDLER
*
100304522_2000545236 _Rev. 02
VALVE
IN

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