Instruction Manual
HOT WATER COIL PIPING PRECAUTIONS
CDX-HW
CDXX-HW
:
Installation, Operation, and
Maintenance
Instructions
6
HOT WATER COIL PIPING PRECAUTIONS
HOT WATER COIL
PIPING
PRECAUTIONS
1.
Flush all field piping prior to connection to remove all debris.
2.
Use wet cotton rags to cool valve bodies when soldering.
3.
Open all valves (mid-way for hand valves, manually open on motorized
valves) prior to soldering.
4.
When soldering to bronze or brass, heat the piping while in the socket/cup
and begin introducing the solder when the flux boils rapidly. Avoid direct
flame into the solder joint.
5.
Heat can only be applied to the cup of the valve body for a minimal time
before damage occurs (even with the use of wet rags).
6.
Avoid rapid quenching of solder joints as this will produce joints of inferior
quality
7.
Provisions must be made for expansion and contraction of piping systems.
All horizontal and vertical risers, including runouts, must be able to
withstand significant movement with temperature changes. Failure to do so
will result in damage and failure of piping, fittings and valves throughout
the building.
8.
All piping made in the field should be installed with consideration of
additional space for any electrical routing that may be required.
9.
Connect all piping per accepted industry standards and observe all
regulations governing installation of piping systems.
CAUTION: Hydronic systems are not designed to hold pressurized air and should
only be tested with water. Pressurizing system with air could damage
equipment.
10.
When all connections are complete, pressure test system. Repair any solder
joint leaks and gently tighten any leaking valve packing nuts and piping
accessories, as required.
NOTE: A water heater is designed to produce hot water. Hot water represents a
serious safety hazard due to potential scalding. The temperature of water
normally required to provide space heating (135 to 140 degrees) may be hotter
than certain codes allow for domestic hot water. An “anti-scald valve” can be
installed in the hot water piping that would allow the domestic water to be
supplied at a lower temperature than the space heating water. These can be
obtained locally and should be installed according to the manufacturer’s
installation instructions.