4. INSTALLATION AND CONNECTING UP OF THE
COMPRESSOR
PACKAGE
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4.1 GENERAL
This chapter contains instructions for the proper installatlon
of Grassoscrew compressor packages. 8efore thé package
is ready for commissioning and initial start up, the following
must be completed In the order given:
4..2 START-UP SERVICE OUTLI NE
1. The package is to be teveled securely, anchored to
the foundation and grouted according to para. 4.4 in
order to assure stability of the coupling alignment as
in paragraph 4.7.
2. All refrigeration piping is to be completed as in para.
4.6. Relief valves are to be properly vented.
3. The water pîping Is to be completed wi1h the water
valve installed for water cooled packages as in para.
4.6,
4. The system and the compressor package are to be
pressure tested tor leaks as in para 4.9-
5. The system is to be evacuated to remove air and rr,ois
ture as ln para. 4.10.
6. The coupl!ng
is
to be aligned within the specifîcations
in para. 4.7.
7. The electrical wiring is to be completed as per wiring
diagrams. Do not energize the compressor control
cabinet until oll is added or the oil heater is discon
nected.
8. The compressor is to be filled with thé correct type
and amount of lubricating oil as in para. 4.11.
9. The oil is to be warmed up as in para. 4.12.
10. The control cabînet rs to be energized to check the safe
ty switches and the capacity controf as in para. 4.14,
�
1.
The
direction of rotation of
the
motor
is
to
be
checked
as in para. 4.16.
12. The electric valve actuator is to be checked as in para-
graph 4.15.
The Supplier-Representatîve will supervise the following
with
customer:
1. Check the genera! installation.
2. Check the coupting alignment.
3. Check the electrical safety controls.
4. Check capacity contro1 actuator adjustment.
5. Start the compressor for the first time and adjust all the
packages valves and controls.
6. Explafn compressor ope.aüon to the operating personnel.
4.3 RECEIPT OF THE PACKAGE
1mmediately on arrival of the Grassoscrew compressor pack
_,e unpack all the crates and boxes and check the items
against shipping lists
for
any possible shortages. Examine
the compressor, package components and loose items tor
possible darnage in transit. Notify the carrier ot any short
ages or damages and enter the approprlate claim with them.
Prior to despatch frorn the works the package has been
charged with dry nitrogen: therefore all stop valves are
closed and all flanged connections are sealed wlth a blind
plate and gasket between flange and counlerflange.
fn order to prevent penetration of moisture and impurities, it
is recommended to leave the nitrogen charge in the pack
age untîl ît is installed. Also the plastic covers on the stop
valves should be kept in posftion. lf the package should be
stored, il must be kept at all times in a dry locanon to pre
vent corrosion damage. lf1he package is to stored tor a pro
longed period of time, the unit should be checked
occassional!y that the holding charge of dry nitrogen re
mains above atmospheric pressure. Thîs will prevent corro
sion from any molsture that might enter the compressor
package.
4.4 FOUNDATION REQUIREMENTS
The compressor package can be mounted and secured to
any hard rigid and level surface which is adequate to sup
port the weight of the package. Since the screw compressor
is a relatively vibration free
rotary
machine, it does not have
to be mounted on an ïnertia bloci<. (heavy foundation) or pad.
In m1.Jltlple machine installation of 350 HP (250 kW input
power) or larger or in locations with excessive floor vibration
of external soureé, it may be necessary to mount the pack
age on an inertia bleek or pad and îsolate the package and
pad frorn the floor.
To carry out installation, testing and future servîcing, sutfi
cient space around 1he package should be available.
4.5 INSTALLATION OF THE PACKAGE
Check the foundation anchor bolts spacings with the hole
spacings in the package frame base.
Lift the package by placing slings at each hoisling eye of
the steel base frame. Use spreader bars or timber under the
slings to prevent damage to the pfping and components .. Do
not sling trom the pipework, the inlet device or the eyebolt
holes in the motor. Eyebolts have been provided for liftlng
component pîeces only and not the entire package.
lf the mounting surface îs not level, use shims under the
frame to distrîbute the weight evenly over the entire frame.
Any gross dîstortion of the frame when the anchor beits are
tightened will complicate the alignment of the coupling.
Do not grout the package frame to the foundation at thîs
stage. Groutrng with an expanding grout around the entire
base is necessary after the refrigerant p1ping is connected
and 1he compressor and motor are roughly aligned (approxi
mately 1 mm) total indicating reading). The grouting will then
minimize any base deflect,ons that may affect the coupling
a11gnrmm1.
4.6 CONNECTING
THE
(PACKAGE} SYSTEM PIPING
The size and location of the 1efrîgerant suction, discharge,
econornizer and water conriectîons, can be tound on the
92.01
Compressor Package GSLP
Page 4.1
