13–11–602 Page 14
* (OPTIONAL) WATER CONTROL VALVE AND WATER SHUTOFF VALVE MUST BE ORDERED SEPARATELY.
FIGURE 2–7 – SERIES PIPING
FIGURE 2–8 – PARALLEL PIPING
Hot water under pressure will cause
severe personal injury or death. Do
not operate compressor until a water
drain line is installed from compres-
sor water drain port to a floor drain.
BLOWDOWN VALVE PIPING – The blowdown valve
is piped back to the air end at the inlet valve. The air
filter acts as a muffler.
WATER PIPING (Water–Cooled Heat Exchanger
Models Only) – On machines equipped with water–
cooled heat exchangers, the water inlet and outlet con-
nections are located in the unit base flange on the left
side of the unit.
The water source should be capable of supplying up to
the maximum flow shown in FIGURE 2–5 and
FIGURE 2–6, pages 12 and 13, at a minimum pressure
of 40 psig (2.8 Bars); maximum allowable water pres-
sure is 150 psig (10.3 Bars). The water flow rates
shown in FIGURE 2–5 and FIGURE 2–6, pages 12
and 13, are approximate and a guide to sizing piping,
cooling tower and other water system equipment.
The heat exchanger system is designed to operate with
water inlet temperatures from 60
_
F to 90
_
F (16
_
to
32
_
C) and a water outlet temperature not to exceed
110
_
F. (43
_
C). If water cooler than 60
_
F (16
_
C) is
used, high water outlet temperatures (over 110
_
F –
43
_
C) will be experienced along with shortened heat
exchanger life caused by tube fouling and corrosion.
If water warmer than 90
_
F (32
_
C) is used, higher com-
pressor injection water inlet temperatures and high wa-
ter usage will result.
Most water systems will require control of impurities:
filtration, softening or other treatment. See “Compres-
sor Injection Water Cooler – Water–Cooled Heat Ex-
changer,” for more information on the water system.
The cooling water for the water–cooled heat exchanger
and aftercooler does not have to meet the compressor
recirculating system potable requirement.
SERIES PIPING (FIGURE 2–7) – Water flow must be
through the aftercooler first for effective cooling of dis-
charge air and is so piped on the standard water–
cooled unit.
PARALLEL PIPING (FIGURE 2–8) – A separate wa-
ter control valve is required to control the discharge air
temperature. If a remote (externally mounted) water–
cooled aftercooler is piped in parallel with the heat ex-
changer, provide a separate water control valve for the
aftercooler and pipe separate inlet water lines to both
the aftercooler and heat exchanger.
The water control valve is to be adjusted to maintain
water out of the heat exchanger within the 100
_
to 120
_
F (38
_
to 49
_
C) range regardless of inlet water flow or
temperature as long as a minimum flow for a given tem-
perature is met (FIGURE 2–5 and FIGURE 2–6, pages
12 and 13). See “Water Flow Control Valve For Heat
Exchanger,” page 15, for adjustment instructions.
COMPRESSOR INJECTION WATER COOLER –
WATER–COOLED HEAT EXCHANGER
–
(FIGURE 5–2, page 43) – The compressor injection
water heat exchanger is a multiple pass type cooler
Summary of Contents for TWISTAIR EWDQ D
Page 14: ...13 11 602 Page 4 FIGURE 1 6 AIR WATER SCHEMATIC FIGURE 1 7 OIL SCHEMATIC...
Page 17: ...13 11 602 Page 7 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 18: ...13 11 602 Page 8 DECALS 216EAQ077 206EWD077 222EAQ077 221EAQ077 208EAQ077...
Page 35: ...13 11 602 Page 25 FIGURE 4 2 FLOW CHART FOR SET UP PROGRAMMING...
Page 44: ...13 11 602 Page 34 FIGURE 4 6 CONTROL TUBING SCHEMATIC 206EWD797 A Ref Drawing...
Page 48: ...13 11 602 Page 38 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE 202EWD546 REF DRAWING...
Page 49: ...13 11 602 Page 39 FIGURE 4 11 WIRING DIAGRAM WYE DELTA 203EWD546 REF DRAWING...
Page 50: ...13 11 602 Page 40 FIGURE 4 12 AUTO SENTRY ES CONTROLLER DISPLAY...
Page 53: ...13 11 602 Page 43 FIGURE 5 2 FLOW DIAGRAM AIR COOLED 202EWD797 B Ref Drawing...
Page 54: ...13 11 602 Page 44 FIGURE 5 3 FLOW DIAGRAM WATER COOLED 203EWD797 A Ref Drawing...
Page 68: ......
