DriSteem RL-3 - Duct Installation

28
DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
90-2579
• When locating registers and diffusers be aware of the
following;
• Relative to other dehumidifier inlets/outlets – must
be a minimum 10 feet (3 m) apart and do not direct
toward one another.
• Relative to HVAC diffusers – ensure minimum 10
foot (3 m) distance from other HVAC diffusers.
• For agriculture applications – do not directly vent
onto plants.
• Ensure that the ductwork is supported within 2 feet
(0.6 m) of inlet and outlet of the dehumidifier. Consult
building codes and standards for duct support
requirements beyond 2 feet (0.6 m) of the dehumidifier.
DUCT SIZING AND ROUTING
• Unit performance decreases as airflow decreases,
the shortest possible duct lengths with minimal bends
should be used.
• Max static pressure is 0.6" w.c. (149 Pa).
• Install the dehumidifier in location where filter door,
service access panel, compressor side panel, and user
interface are accessible.
• Do not install a bend in the ductwork within 2 feet
(0.6 m) of the dehumidifier inlet or outlet.
• When selecting duct material, it is preferred to use
metal ducting to maintain airflow. If flex duct is to be
used, ensure it is extended out as much as possible
to limit disruptions to the airflow. Note:Use only
insulated ducting when the inlet side of the duct work
is located outside of the conditioned space. In some
instances when the dehumidifier is placed outside of
the conditioned space, the cabinet of the dehumidifier
may also need to be insulated to prevent condensation
formation on the exterior of the unit.
• Do not duct more than one dehumidifier together. See
Figure 28-1.
FIGURE 28-1: DO NOT DUCT MORE THAN ONE DEHUMIDIFIER
IN SERIES (ALL MODELS)
Duct installation
Table 28-1:
Equivalent length of bends
45° bend 5 feet (1.5 m)
90° bend 10 feet (3.0 m)
180° bend 30 feet (9.1 m)
Model RL-31 shown
INSTALLATION
Table 28-2:
Duct Sizing and Routing
RL-31 RL-14 RL-9
Inlet/Outlet Round Duct Collar Diameter 24" (610 mm) 18" (457 mm) 12" (305 mm)
Nominal Airflow through Dehumidifier 1760 CFM (2911 m
3
/h) 830 CFM (1410 m
3
/h) 525 CFM (892 m
3
/h)
Minimum Total Open Area when using
Registers and Diffusers
452 in
2
(0.3 m
2
) 254 in
2
(1642 cm
2
) 113 in
2
(730 cm
2
)
Distance of Metal Duct Not to Exceed or
Distance of Flex Duct Not to Exceed
1000' (305 m)
750' (229 m)
1000' (305 m)
750' (229 m)
400' (122 m)
300' (91 m)