FORM 145.32-IOM4 (818)
20
The use of louvers with higher velocities than above
may be employed, at the discretion of the
engineer/installer, provided that the total air pressure
drop does not exceed the capability of the condenser
fan and motor. The use of low restriction louvers with
shallow blade angles can allow higher face velocities
without excessive static pressure loss.
Exceeding the static pressure capability of the
condenser fan will result in insufficient condenser air
volume. This will cause a loss in system capacity, and
may cause compressor shut-down during high ambient
periods. (Installation of an oversize condenser
motor/drive, where applicable, may be considered in
such cases.)
(As a general rule, these velocities will require an intake
louver sized approximately 1.25 to 1.5 times the
dimensions of the duct connection on the unit, and a
discharge louver sized approximately 1.5 to 2 times the
duct connection dimensions.)
Use only louver sections that provide different
deflection angles for air discharge and air intake, to
ensure the unit does not short circuit. Protect the unit
from weather conditions (rain, snow) entering through
the condenser air intake. All outdoor air ducts should
pitch away from the unit, toward the outside wall.
Connect all ducts to unit with canvas section duct
connectors or choose another suitable noise and
vibration absorbing device.
The Manufacturer will not accept any
liability resulting from incorrect instal-
lation of this equipment. Follow instal-
lation instructions carefully.
ELECTRICAL WIRING
Follow local electrical codes when making electrical
connections. Units are completely factory wired for
normal supply voltages (i.e. 208-230, 460,
575V/3Ph/60Hz) Confirm unit specifications by
checking unit data plate. The factory wiring terminates
in two boxes, one in each section of the unit. The
electrical control boxes are located behind outer
access panels. Each electrical compartment has its
own control cover.
Provide individual power disconnects for each unit, or
each section in the case of split applications. Install a
secure ground to both evaporator and condenser. If
canvas flexible joints are used on ductwork, install a
ground wire to the ductwork as well. Unit requires
installer to provide a 24volt thermostat with appropriate
heating and cooling stages as needed. The condenser
section electrical cover is installed with wiring diagrams
on the inner access door, which must be opened to
read the diagrams
DISCONNECT AND LOCK OUT POWER
WHEN SERVICING UNIT. UNIT MAY
START AUTOMATICALLY IF POWER IS
NOT DISCONNECTED. FAILURE TO DO
SO MAY RESULT IN PERSONAL IN-JURY
OR DEATH DUE TO ELECTRICAL
SHOCK.
PACKAGED UNIT
If unit is to be installed as a packaged unit, the
thermostat (low voltage) wiring and power wiring will be
brought through the evaporator section. Check the unit
nameplate for minimum circuit ampacity and fuse
sizing.
SPLIT SYSTEM
If the unit is a split system application (condenser
section remote from evaporator section), refer to the
wiring diagram below.
IMPORTANT: All wiring must comply with
applicable local and national codes
(NEC). Type and location of disconnect
switches must comply with all applicable
codes.
For low voltage thermostat wiring, 18 Ga. wires may be
used for up to 50 feet lengths. Low voltage runs up to
125 feet require 16 Ga. wires.
Summary of Contents for DSH Series
Page 4: ...FORM 145 32 IOM4 818 4 ...
Page 5: ...FORM 145 32 IOM4 818 5 DSH024C DSH060C SINGLE COMPRESSOR UNIT TYPICAL INSTALLATION DIAGRAM ...
Page 6: ...FORM 145 32 IOM4 818 6 DSH096B 120B DUAL COMPRESSOR UNIT TYPICAL INSTALLATION DIAGRAM ...
Page 7: ...FORM 145 32 IOM4 818 7 NOMENCLATURE TABLE ...
Page 18: ...FORM 145 32 IOM4 818 18 UNIT CORNER WEIGHTS ...
Page 21: ...FORM 145 32 IOM4 818 21 TYPICAL WIRING SCHEMATICS ...
Page 22: ...FORM 145 32 IOM4 818 22 ...
