FloAire STEAM COIL - Manual (Page 5)

STEAM IOM
3
Coil Types
Distributing
Heatcraft’s JA, RA and DA jet-tube steam distributing coils are excellent for any general
purpose heating application. With the superior freeze resistance provided by the tube-
within-a-tube construction, it is ideal for low temperature preheating and special process
applications. The construction features inner tubes with directional orifices to aid in
steam distribution and condensate removal. Model JA offers same-end supply and re-
turn connections. Model RA offers opposite-end supply and return connections. Model
DA offers dual-supply opposite-end connections for long coils that see sub-freezing air
temperatures. Models GA, TA and LA utilize cupro-nickle, carbon steel and stainless
steel tubing for high-pressure construction.
Single Tube
Heatcraft’s SA steam coil is designed for general purpose heating. The construction
features a single tube design with opposite-end supply and return connections. A perfo-
rated baffle located directly behind the supply connection insures proper steam distribu-
tion. Model HA utilizes cupro-nickle, carbon steel and stainless steel tubing for high-
pressure construction.
Standard Steam
Heatcraft’s SS steam coil features return-bend construction and same-end connections.
Model SH utilizes cupro-nickle, carbon steel and stainless steel tubing for high-pressure
construction.
Installation
1. Carefully remove the coil from the shipping package to avoid damage to the finned
surface area. Damaged fins can be straightened using an appropriate fin comb.
2. Heatcraft recommends cleaning the coil with a commercially available coil cleaner prior
to installation. Refer to Maintenance on Page 5 for cleaning recommendations.
Note 1: Vacuum breakers and air vents should be piped to a drain or other suitable
location where discharged steam cannot lead to personal injury.
Figure 3 - Steam Coil Piping Diagram
Air Vent
Union
Control Valve
Strainer
Optional
Location for
Air Vent
Vacuum Breaker
Union
Drip Leg
(14” Min.)
Dirt Leg
(6” Min.)
Strainer
Check
Valve
Steam
Trap
Gate Valve
To Condensate
Return
Strainer
Gate Valve Steam
Trap
Dirt Leg
(6” Min.)
Supply
Gate
Valve