Trane BCVC, BCHC, BCXC-SVX01B-EN manual Type NS steam coils, horizontal tubes for horizontal airflow

Installation Piping

6.Do not modulate steam or use on-off supply control on systems with overhead or pressurized returns unless condensate is drained by gravity to receiver (vented to atmosphere) and returned to main by condensate pump.

7.At startup with dampers, slowly turn steam on full for at least 10 minutes before opening fresh air intake.

8.Pitch all supply and return steam piping down a minimum of one inch per 10 feet in direction of flow.

9.Do not drain steam mains or take-offs through coils. Drain mains ahead of coils through steam trap to return line.

10.Do not bush or reduce coil return tapping size. Run return pipe full size of steam trap connection except for short nipple screwed directly into coil condensate connection.

11.Overhead returns require 1 psig pressure at steam trap discharge for each 2-foot elevation to assure continuous condensate removal.

Figure 11. Type NS steam coils, horizontal tubes for horizontal airflow

Code of System Components

FT = Float and thermostatic steam trap BT = Bucket steam trap

GV = Gate valve

OV = Automatic two-position (on-off) control valve

TV = Automatic three-way control valve

VB = Vacuum breaker, 15-degree swing check valve

CV = Check valve ST = Strainer

AV = Automatic or manual air vent

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