Carrier 5F - Manual (Page 13)

HEATING A COOLING
5F,H
Open-Drive Compressors
m
m
Step 7 — Check Compressor/Motor Alignment
BELT DRIVE — See Accessory Belt Drive Package
manual for installation and alignment instructions.
DIRECT DRIVE — Install and align compressor,
coupling and motor as described in manual for Flexible
Couplings for Direct-Drive Units.
HOT CHECK AND DOWELING — To help maintain
alignment, and to ensure exact repositioning of the
motor after servicing, the motor and eompressor must
be doweled to tbe base. Install doweling only after
motor!eompressor
alignment has been hot checked
(checked after the compressor has warmed up to oper­
ating temperature after initial alignment).
After hot check and while components are still at
operating temperature, drill and ream 2 holes through
diagonally-opposite motor and compressor feet and the
base. Use a 9/32-in. drill and a no. 6 taper reamer. Secure
the motor and compressor to the base with the no. 6 x
2-1/2 in. taper dowel pins provided in the motor fasten­
ing set.
Coat the dowels with white lead or other lubricant to
prevent rusting, and tap the dowel lightly into position
so that 1/16 of taper is left above the motor foot.
Check that all dowels are tight and that they do not
bottom.
Step 8 — Assemble Water Piping — See Water-
Cooled Condensers Installation Instructions and Water-
Cooled Heads Installation Instructions for information.
Step 9 — Prepare Lubrication System
INSTALL OPTIONAL EQUIPMENT — Consult local
Carrier
representative for information on these
accessories.
Oil Filter — Oil filter for 5H40 through 5H86 com­
pressors is available as separate accessory package. Refer
to Accessory Oil Filter Package Installation Instructions
for installation procedures.
If an accessory oil cooler is also installed (see below),
pipe oil filter into system as shown on diagrams in Acces­
sory Oil Cooler Installation Instructions.
Oil Cooler — Refer to Accessory Oil Cooler Installation
Instructions included with this accessory package.
Readjust oil-cooler water flow so that it maintains
specified oil temperature when compressor has reached
operating temperature.
Oil Separator — If oil separator is used in system piping,
pipe oil return line to compressor suction line. To mini­
mize possibility of flooding compressor with oil, oil
return line diameter should not exceed 1/4 inch. In addi­
tion, line should have manual shutoff valve to throttle
oil flow as required and to isolate separator for service.
CHECK OIL LEVEL — Check that oil level is visible
at center of compressor sight glass. Compressors that use
optional equipment such as filter, cooler, and oil
separator described above will require a greater oil
charge than listed in Table 4. Recheck oil level after
operating compressor. If unit needs additional oil, use
only dehydrated, wax-free, refrigeration-grade oil of
suitable viseosity. Table 4 lists oil suitable for use in
reciprocating compressors.
PREPARE FOR INITIAL START-UP
Evacuate, Dehydrate and Leak Test the entire
refrigerant system as described in Carrier Standard
Service Techniques Manual, Chapter 1, Sections 1-6
and 1-7.
LEAK TESTING
Preferred Method — Charge the system to 10 psig with
refrigerant. Add dry nitrogen or dry air (DO NOT USE
OXYGEN) until system pressure is 150 psig. Check for
leaks with a halide or electronic leak detector.
Alternate Method — Charge the system with dry
nitrogen or dry air (DO NOT USE OXYGEN) to 40 psig
and use soap-bubble test to find large leaks.
A CAUTION
Do not use compressor to build up pressure. Do not
overcharge the system.
Refrigerant Charging — Use the sight glass method
to charge the system. See Section 1-8 of Carrier Standard
Service Techniques Manual, Chapter 1, for details.
Charge the system to a clear sight glass while holding
saturated condensing pressure constant at 125 F for air­
cooled systems or 105 F for water-cooled systems. Add
additional
refrigerant to fill condenser subcooler
coils, if required.
5F,H CONDENSING UNITS ^ After a clear sight glass
is obtained, add charge until liquid refrigerant reaches
the condenser liquid level test cock.
5F,H COMPRESSOR UNITS — See condenser data for
additional charge requirements.
START-UP
Preliminary Steps
1. Energize crankcase heater for at least 24 hours before
starting unit.
2. If control transformer is not used, operate electrical
control circuit with main power switch OFF to ensure
that field connections have been properly made.
3. Install felt sock filter for the first 50 hours of com­
pressor operation. Remove and inspect the filter,
clean it if required and replace it for another 50 hours.
Remove sock when system is clean. (Not applicable for
5F20 and 5F30 units.)
4. Cheek that motor rotates in direction that the arrow
on the eompressor oil pump cover indicates. Refer to
Installation, Step 5, under Check Motor Rotation.
5. Check that oil fills 1/3 to 1/2 of the compressor
sight glass.
6. Open water supply valve to condenser. Open pressure
line valve of water-regulating valve (if used). If
eompressor unit is equipped with air-cooled con­
denser, turn on condenser fan.
7. Backseat (open) compressor suction and discharge
service valves. Open liquid line valve at receiver.
8. Start evaporator fan or chilled water pump.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2 PC111 Catalog No 530-526 PrintedinUSA Form5F,H-11SI Pgi3 2-86 Replaces: 5F,Fi-9SI
Tab 2a For replacement Items use Carrier Specified Parts