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