HV-4 · ahu
HV-4 (H&V-4)
Heating & ventilating unit — 20,000 CFM steam coil make-up into the boiler room.
Identity
- Tag
- HV-4 / H&V-4
- Location
- Fresh-air make-up into boiler room
- Duty
- Steam heating / ventilating of OA
Airflow
- Design CFM
- 20,000 SCFM
- Face velocity (coil)
- 709 fpm
- Air PD (coil)
- 0.40 in.wg
Steam coil
- Manufacturer
- Marlo (AirFlow Equipment submittal 10/21/2002)
- Model
- (1) 2H21-84-8905T-28.2-H/V-B/W
- Certification
- ARI Std 410
- Inlet
- Single-end steam
- Quantity
- 1 coil
- Face
- 47.25 in H × 84.0 in L finned; face area 28.2 ft²
- Tubes
- Copper 0.035 in wall
- Fins
- Aluminum 0.010 in
Coil performance (design)
- EAT → LAT
- −10.0°F → 79.4°F DB
- Sensible capacity
- 1,716,212 BTU/hr (~1.72 MMBTU/h)
- Steam
- 10.0 psig / 239°F
- Condensate
- 2,033 lb/hr
Blower
- Type
- BAF-DW size 300, DWDI Class I, 30" wheel
- CFM @ SP
- 20,000 CFM @ 3.75 in.wg
- RPM / tip speed
- 1,171 RPM / 9,197 fpm
- Operating BHP
- 15.56 (motor ≥ 15.56 → likely 20 HP)
- Outlet velocity
- 2,148 fpm (outlet area 15.56 ft²)
- Static / mech eff
- 75.78% / 81.60%
- Drive
- Belt (sheave adjustable)
- Max Class I RPM
- 1,349
- Sound LwA
- 94 dB
Belts
- Size
- 5VX900 (90 in)
- Quantity
- 2
BMS
- Points
- HV4DaTemp, MaTemp, RmTemp, DaStpt, …
Notes
- Fed from 10 psig plant steam (same header as HHW HX and Cemline).