Catalogue

UV-PRC003-EN 81
Jobsite Connections
Coil Type/Specification Header Sizes
Hydronic Main/Auxiliary Reheat Coils
(Cooling Coil or Heating/Cooling Changeover Coil)
• Wavy plate finned.
• Hydrostatically tested at 350 psig.
• All piping packages for the main coil and auxiliary reheat coil assemblies are always
supplied as a 3/4 in. package.
• 3/4 in. Nominal
• 7/8 in. ID
Hydronic Auxiliary Preheat Coils
(Heating Coil)
• Wavy plate finned.
• Hydrostatically tested at 350 psig.
• All piping packages for the auxiliary preheat coil assemblies are always supplied as
a 1/2 in. package.
• 1/2 in. Nominal
• 5/8 in. I.D.
Steam Heating Coils
• 1-row, tube-in-tube distributing coil.
• Piping packages for steam coils are field provided.
• Equipment specified with Trane controls will benefit from an optional 2-position
isolation valve (Main Coil) to be used for close-off of the steam coil when the damper
is in full bypass position.
• The modulating piping valve (option) is shipped loose and field installed.
• 1 in. FNPT
Electric Heat Coils
• Electric preheat coils consist of special finned element for maximum life, heat transfer
and safety.
• Units include a high temperature cut-out with a continuous sensing element. This
device interrupts electrical power whenever excessive temperatures are sensed along
the leaving air side of the coil.
• Power connection is made in the right-hand end pocket.
• A circuit breaker option is available through the equipment model number.
Direct Expansion (DX) Coils
(Refrigerant Cooling Coil)
• The DX refrigerant coil includes a factory mounted thermal expansion valve (TXV) and
equalizing tube, 24 Vac transformer, time delay relay, frost detection, outside air
sensor.
• TXV is sized for R-410A refrigerant. The type of coil is order specific through the unit
model number selection.
• 3/8 in. OD liquid line
• 7/8 in. OD suction line
Figure 43. Coil header location
UV-PRC003-EN.book Page 81 Tuesday, June 4, 2013 8:59 PM