PART 5: HYDRONIC PIPING
(CONTINUED)
HYDRONIC PIPING
17
piped using a closed type expansion tank.
Connect the expansion tank to the air separator only if the separator is on the suction side of the cir-
culator. The Hydronic Heating module has a water line connection of ½” NPT to connect into the
pressure reducing valve and back flow preventer. Normal system pressure is 15 PSI.
D. HYDRONIC HEATING MODULE SYSTEM PIPING
The Phoenix Evolution Hydronic Heating Module is designed to function in a closed loop hydronic
system. The temperature and pressure gauge (included) will allow the user to monitor the system
pressure and temperature from the Hydronic Heating Module.The gauge should be installed on the
supply outlet piping from the Heating Module. The installation of an air elimination device will
remove air from the system which is necessary to avoid an air lock in the central heating circulator.
It is recommend that all the piping is insulated to improve on the systems overall efficiency. In the
system piping, heating coils in air handler, flow control valves or other devices must be installed to
prevent gravity circulation of heated water from the Heating Module. Freeze protection for new or
existing systems must be glycol that is specifically formulated to include inhibitors that will prevent
the glycol from attacking the metallic system components. Make certain that the system fluid is
checked for the correct glycol concentration and inhibitor level. The system should be tested at least
once a year or as recommend by the producer of the glycol solution. Allowance should be made for
the expansion of the glycol solution in the system piping. Example: 50% by volume glycol solution
expands 4.8% in volume for the temperature increase from 32°F to 180°F, while water expands 3%
with the same temperature rise. Listed below are the basic steps that will help guide you through the
installation of the Hydronic Heating Module to the system piping.
1.
Connect the system return marked “Return”
2.
Connect the system supply marked “Supply”
3.
Install a balance and purge valve or shut off drain valve on the system return to purge air out
of the zone at start-up.
4.
Install a back flow preventer on the cold feed make –up water line.
5.
Install a Pressure Reducing Valve on the cold feed make up water line (15 PSI operating
pressure). Check Temperature and Pressure Gauge when operating. It should read minimum
pressure of 15 PSI.
6.
Install the system circulator as shown in the piping details in this section. Make sure the
circulator is properly sized for the system and friction loss.
7.
Install an Expansion Tank on the system supply. Consult the expansion tank manufacture’s
instruction for specific information related to expansion for the required system volume and
capacity.
8.
Install an Air Elimination Device on the system supply.
9.
Install a drain valve at the lowest point of system to blow out the system if needed. Note:
The Hydronic Heating Module can not be drained completely of water without purging the
unit with an air pressure greater than 15 PSI but not to exceed 40 PSI. If winterizing the unit
it is recommended, use glycol on the closed loop hydronic side only.
10. The relief valve is installed at the factory. A pipe discharge line should be installed 6 “ above
the drain in the event of pressure being relieved. The pipe size must be the same size as the
relief valve outlet.
n
WARNING
NEVER BLOCK THE OUTLET OF THE SAFETY RELIEF VALVE.
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