STEAM "SBS" AND HOT
WATER "SBW SYSTEMS
H - SPACE HEATING
(100% RETURN AIR)
The H-Space Heating unit is designed for 100% return air
space heating applications with the air temperature being controlled from the heated
space. Not recommended for ventilating applications.
Two position space thermostat control with two position
valve and choice of constant or intermittent fan operation.
Modulating space thermostat control with modulating valve
and constant fan operation. |
STANDARD EQUIPMENT (All Models)
General :
Either of two horizontal blower arrangements are available
as standard: HR-1, horizontal discharge and HR-2, down discharge, as illustrated below.
Cabinet :
Bolted construction of aluminized steel; SB-112/115 of 18
gauge, SBD-215/218 of 16 gauge, SBD-222/227/233 with 16 gauge sides and 14 gauge top, and
SBD-240 with 14 gauge cabinet. Access panels are provided o allow easy access to motors,
drives and filters (if ordered). Outside surface is primed with zinc-chromate and finished
with a coat of enamel.
Blower :
Centrifugal forward curved, double width, double inlet,
class 1 fan(s) with solid turned ground shaft and self-aligning, greaseable ball bearings.
All blower wheels are statically and dynamically balanced.
Blower housings, bearings and adjustable motor base are
mounted on a reinforced frame to insure rigidity and quiet operation. Adjustable drives
are standard through 10 HP, fixed drives with 15 HP and larger motors. V-belt drives are
sized for 135% of motor horsepower.
SB-240 will have twin fan set with center coupling - twin
city 39" FL (std. fans).
Fan motors and drives are mounted within the blower
cabinet. This affords motor protection and eliminates the operation hazard of V-belt
drives external to the unit.
Filters :
Filter section with "V" or "Z" frames.
Motor :
T-frame, open drip-proof, 1800 RPM prelubricated ball
bearing type for all standard voltages.
Electric Controls :
- Motor starter.
- Control transformer
- Freezestat (s).
- NEMA 1 master control panel.
- Remote control station with system switches and indicating
lights.
- All controls, dampers and motors as shown with each system
sequence on pages 2 and 3 of this bulletin.
Note
Valves, valve motors and linkage, room thermostats, potentiometers and remote control
stations are shipped for field piping and/or mounting and wiring.
Coils :
Fabricated of heavy gauge copper tubes, staggered on
1½" centers, mechanically bonded to energy efficient plate type aluminum fins.
Headers are constructed of heavy seamless copper tubing and coil casings of double flanged
galvanized steel. All coils tested leak free at 315 PSIG air pressure under water. Steam
systems furnished with steam distributing coils having free floating cores and pitched in
casing to ensure condensate drainage. |
