Space Pak ESP-G SYSTEM Installation, Operation & Maintenance Manual page 4

Plenum Duct
The plenum duct can be run in practically any location
accessible for the attachment of the supply tubing (see
suggested layouts in Figure 1.2). The plenum is normal-
ly located in the attic or basement, and it is usually more
economical to run the plenum where it will appreciably
shorten the lengths of two or more supply runs.
In some two-story split level homes, it may be advanta-
geous to go from one level to another with the plenum
duct. Whenever necessary, either between floors or
along the ceiling, the small size of the plenum makes it
easy to box in.
FAN COIL
PLENUM
UNIT
FAN COIL
PLENUM
UNIT
FIGURE 1.2: PLENUM/TUBING LAYOUT EXAMPLES (FOR GUIDANCE ONLY)
The fan coil unit is designed to operate with a total exter-
nal static pressure of 1.5 inches of water column (mini-
mum 1.2 - maximum 1.5). Excessive static pressure
increases the air flow in individual runs and may cause
some or all terminators to be noisy.
For systems designed with a bullhead tee installed as on
Unit No. 1 (Figure 1.3), the best results are obtained if not
more than 60% of the total number of system outlets are
attached to any one branch of the tee. For systems with a
branch tee installed as on Unit No. 2 (Figure1.3), not more
than 30% of the total number of system outlets should be
attached to the perpendicular branch of the tee.
FAN COIL
PLENUM
UNIT
FAN COIL
4
FAN COIL
PLENUM
UNIT
PLENUM
UNIT