Gardner Denver ELECTRA-SAVER ETY99A, Manual

Page: 20 / 58

13–13–600 Page 12
FIGURE 2–6 – COLD WEATHER INSTALLATION
301ETY797
(Ref. Drawing)
normal low discharge temperature of about 180
_
F at
100 PSIG discharge pressure to near inlet air tempera-
ture, or cooling water temperature.
Air–Cooled Machines – When an aftercooler is fur-
nished on an air–cooled machine, the aftercooler is
installed on the oil cooler module between the fan and
the oil cooler. The moisture separator is furnished by
Gardner Denver but must be mounted by the customer
between the aftercooler and the auxiliary air receiver
with a condensate drain provided at the bottom. All air
piping from the compressor discharge to aftercooler to
auxiliary air receiver is to be furnished and mounted by
customer. The design of the aftercooler piping
must be approved by the factory before installa-
tion. Design information to be submitted for approval
includes:
Failure to remove condensate from an
idle cooler in freezing temperatures
will cause permanent cooler damage.
Drain condensate after system shut-
down. It is the owner/operator’s re-
sponsibility to ensure that conden-
sate has been drained and cooler
dried out to prevent cooler damage.
1. Location of aftercooler module – inside or out-
doors.
2. Range of operating ambient temperatures at the
aftercooler location.
3. Pipe type and size(s) to be used to connect the af-
tercooler, separator, and compressor unit – mini-
mum pipe size is 5” NPT.
4. Lengths of the pipe run. If more than one pipe size
is used, list length of each size and total length.
5. Number and size of elbows, tees, unions, reduc-
ers, and valves to be used in the pipe run.
6. A dimensional sketch of the proposed piping sys-
tem showing location of the compressor unit, af-
tercooler, separator and auxiliary air receiver, pipe
and fittings illustrating design information included
in numbers 3 through 5 above.
Water–Cooled Machines (FIGURE 2–4, page 10) –
On water–cooled machines with aftercooler, the mois-
ture separator and condensate drain are shipped loose
and must be installed by customer. Customer must fur-
nish and install all water piping required.
INSTALLATION FOR COLD WEATHER OPERA-
TION – It is recommended that the unit be installed in-
side a shelter that will be heated to temperatures above
freezing (32
_
F, 0
_
C). This will eliminate many of the
problems associated with operating units in cold cli-
mates where freezing rain, drifting snow, freezing con-
densate and bitter cold temperatures are encountered.
Refer to Engineering Data Sheet 13–9–411 for the ad-
vantages of using the heat recovered from rotary com-
pressors. This heat recovery could easily pay for an ad-
equate shelter for the unit.
When an outside installation must be made, the pre-
cautions required will depend on the severity of the en-