Sullair EES LS25S Series, Руководство оператора и список запасных частей

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Section 4
INSTALLATION
11
4.1 LOCATION AND ASSEMBLY OF COMPRESSOR
Upon delivery, check your compressor and integral
heat recovery system for any damage which may
have occurred during shipment. Any damage
should be noted on the delivery receipt and a dam-
age claim filed with the shipper.
After the EES is in place, seal all unused holes in
the cabinet and base frame. This is to insure that
cooling air can only enter the compressor cabinet
through the outside air damper.
4.2 THERMOSTAT PLACEMENT
Install the room thermostat (Refer to room thermo-
stat description in
Section 2.3 ) in the space to be
heated in a location where it will sense a represen-
tative temperature and be safe from physical dam-
age or tampering.
4.3 ELECTRICAL PREPARATION
Interior electrical wiring is performed at the factory.
Required customer wiring is minimal, but should be
done by a qualified electrician in compliance with
OSHA, National Electric Code, and/or any other
applicable local electrical codes concerning isola-
tion switches, fused disconnects, etc. Refer to
Sections
6.1
6
, 6.1
7
or 6.
18
for the internal heat
recovery system wiring diagram proportionate to
your EES package.
4.4 DUCTWORK
A. TYPE OF DUCT
Traditionally, duct systems are rectangular and con-
structed of light gauge, galvanized steel. However,
in recent years, round section galvanized steel and
round or rectangular section fiberglass products
have found increased use because of generally
lower installed costs. Galvanized steel, flat, oval
and cross section duct are also available.
The best type of duct system to use should be eval-
uated on an individual basis because each installa-
tion has its own unique requirements and prob-
lems. Because of the large air volumes, low veloci-
ties and low pressures normally encountered, gen-
erally, round section sheet metal duct will produce
the lowest installed cost.
For EES units located in a heated space, it is rec-
ommended that the duct carrying cold, outdoor air
be insulated to prevent wintertime, (exterior of the
duct) water condensation (sweating). If the exterior
of the duct is insulated, a vapor barrier should be
used. If the interior of the duct is insulated, this will
affect the air handling performance of the duct and
should be accounted for in the ductwork static pres-
sure calculations. For EES units located in an
unheated space where the recovered air is ducted
to a heated space, that portion of the duct exposed
to low ambient temperatures should be insulated to
prevent excessive heat loss. For EES units mount-
ed in a space that is also air-conditioned in sum-
mer, the summer rejected air duct should be insu-
lated to reduce the air conditioning load.
B. DUCTWORK STATIC PRESSURE CALCULA-
TION
The static pressure loss imposed by the ductwork
must be calculated. The static pressure loss must
not exceed .50 inches of water column at the rated
CFM. Static pressure loss is calculated using the
total of the inlet duct loss and discharge duct loss.
The following text, tables and formulas will show
how to calculate the ductwork static pressure loss
for your machine. A worksheet has been included
to help in the calculation.
The following three steps must be taken to ensure
the adequacy of an installation’s ductwork design.
1. A total static pressure loss must be calculated for
each branch by summing the static pressure
losses for every component of that branch
2. A total system static pressure loss is calculated
by adding the greater of the two discharge duct
static pressure losses to the inlet duct static
pressure loss.
3. If total system pressure loss exceeds .50 inches
of water, the ductwork must be redesigned or
booster fans added. To reduce the amount of
system static pressure loss, the following
changes will have the greatest effect:
a) Increase in duct size.
b) Increase in the radius of elbows and tees.
c) Addition of turning vanes to tees and elbows.
d) Avoid the use of abrupt duct size changes.
e) Redesign the entrances and exits for the system.
f) Add booster fans if necessary (see
Section 3 ).
C. COMPONENT STATIC PRESSURE LOSS
CALCULATION
STRAIGHT DUCT STATIC PRESSURE LOSS
1. Determine the volume of air to be handled by the
ductwork (consult Section 3 ).
2. If your ductwork is square or rectangular, find the
equivalent round duct diameter from Table 1.
3. Using Figure 4-1 , find the static pressure loss for
100 feet of straight duct.
4. Find the actual static pressure loss in the straight