16
3-90-233R24_11/13
Installation-Plumbing
PRESSURE REDUCING VALVE
(PRV) OR COMBINATION PRV
AND RELIEF VALVE
* BOILER DRAIN, 3/4" NPT
MALE X 3/4" HOSE
* 3/4" NPT MALE PLUG
PIPE TO WITHIN 6" OF THE
FLOOR OR A FLOOR DRAIN
UNION
SENSING BULB
SHUT-OFF VALVE
* ITEMS SUPPLIED
** OPTIONAL
** THERMOMETER
SYSTEM RETURN 3/4"
TYPICAL BOILER HOT WATER PIPING SHOWING AIR REMOVAL SYSTEM, PROVISIONS FOR THE
EXPANSION OF WATER AND THE AUTOMATIC COLD WATER SUPPLY. ALSO SHOWN IS THE AUTOMATIC
MIXING VALVE. THIS COULD ALSO BE DONE BY (2) CLOSELY SPACED TEE'S. THE PROPER PIPING FOR THE
INTENDED USE WILL BE DETERMINED BY THE INSTALLING CERTIFIED PLUMBER OR HVAC CONTRACTOR.
* AUTOMATIC AIR VENT
* TEMP/PRESSURE
GAUGE
* PRESSURE
RELIEF VALVE
EXPANSION TANK
(DIAPHRAGM TYPE)
SHUT-OFF
VALVE
UNION
AIR VENT
AIR SCOOP
** THERMOMETER
SYSTEM SUPPLY 3/4"
NOTE: ALWAYS REFER TO THE INDIVIDUAL COMPONENTS
RECOMMENDED INSTALLATION INSTRUCTIONS FOR THE PROPER
MOUNTING POSITION AND LOCATION WITHIN THE PIPING SYSTEM.
CHECK VALVE (OR BACKFLOW
PREVENTER IF REQUIRED)
AUTOMATIC
MIXING VALVE
SHUT-OFF VALVE
COLD WATER
SUPPLY 1/2"
NOTICE:
When installing with the Atmospheric Conversion,
all of the pressurized system components shown are not
necessary. Air vents or bleeders should be removed from the
plumbing system to prevent air from entering the lines.
NOTE: Cold return water temperature (Sustained temperatures below 140 degrees
Fahrenheit) will lead to condensation or moisture in the firebox. This moisture can
lead to creosote formation. To help minimize moisture and creosote, it is strongly
recommended that some method of temperature balance is incorporated into the
return system.
EXAMPLE OF TYPICAL TANKLESS DOMESTIC HOT WATER PIPING
MIXING VALVE
SAFETY RELIEF VALVE
FLOW REGULATOR WILL NEED TO MATCH THE GPM RATING OF THE DOMESTIC COIL.
CUSTOMER SUPPLIED SS
PLATE HEAT EXCHANGER
DOMESTIC WATER
OUTLET
DOMESTIC WATER
INLET
SHUT-OFF VALVE
SHUT-OFF VALVE
OUTLET
INLET
HOSE BIB
HOSE BIB TO BACKFLUSH COIL IF NEEDED
FLOW REGULATOR
HIGH TEMPERATURE WATER
( IF NEEDED )
NOTE: ALWAYS REFER TO THE INDIVIDUAL COMPONENTS
RECOMMENDED INSTALLATION INSTRUCTIONS FOR THE PROPER
MOUNTING POSITION AND LOCATION WITHIN THE PIPING
SYSTEM.
COLD WATER SUPPLY
MIXING VALVE SET TO DESIRED WATER TEMPERATURE.
NORMALLY NOT MORE THAN 120 DEGREES.
ISOLATION VALVE
TEMPERED HOT WATER TO
SHOWERS AND FAUCETS
