Carrier 5H - Manual (Page 6)

Table 9 - Dimension "C" (ft-in.) (Fig. 10) CRANKCASE HEATER
COMPR
5F
5H
20
30
40
60
60*
40
46
60
66
60*
66
*
80
86
120
126
DRIVE
Belt
2-8-3/8
2- 8-3/8
3- 7-7/8
3- 7-7/8
4- 2-3/4
4-2-3/4
4-7-3/4
4-7-3/4
J
Direct
3-7-7/8
3- 7-7/8
4-
2-3/4
4-2-3/4
4-2-3/4
4-2-3/4
4-2-3/4
4-5-1/2
4- 5-1/2
5- 9-3/4
5-9-3/4
5-9-3/4
5-9-3/4
*Overs bas
Loosely connect compressor discharge line
and adjust condenser position so discharge line
is in line with condenser inlet. Assemble discharge
lines for 5H Series compressors as shown on
special diagram sheet included in 5H condenser
piping packages. Before making joints, try coup­
ling or belt guard to ensure piping clearance.
Place strips of Fabrica provided between lower
support straps and condenser. See Fig. 10.
Tighten lower strap enough to lift condenser
off stands.
Sweat discharge line to condenser. Adjust con­
denser position as required to prevent distortion
of discharge line. Instructions are included in the
piping assembly package.
Place Fabrica strips (see Fig. 10), between
condenser and upper straps. Tighten strap bolts
to secure condenser to stand. NOTE; Use lower
straps only for 5F20 and 30 units. Place the two
extra strips of Fabrica between top of condenser
and base. Assemble discharge line as described
above.
Compressor Bolted to Concrete Base - See Fig. 8.
Set compressor level on foundation bolts. (Level
in two directions.) Removal of discharge shut-off
valve exposes face of mounting flange on com­
pressor which can be used as a leveling pad. Lo­
cate and level motor slide rails. Provide for 3/8
inch to 1/2 inch grout. Tighten foundation bolts
handtight. Do not use wrench.
Wet top of concrete, pour grout and tamp to
fill all spaces between machinery and concrete.
Allow grout to dry slightly then trowel smooth.
Suggested mixture for grout is one part Port­
land cement to two or three parts of sharp sand.
Tighten foundation bolts moderately tight when
grout has hardened for 24 to 36 hours. Overtight­
ening bolts may cause compressor misalignment.
Energizing crankcase heater helps prevent oil
and refrigerant from mixing and accumulating in
crankcase when compressor is off.
Wire heater to relay or set of normally closed
contacts in compressor starter so it will be de­
energized when compressor is operating.
Installation of Heaters- Remove rubber plug from
crankcase heater casing (see Fig, 1 thru 4).
Insert heater element entirely into casing.
Element should fit snugly, not loosely.
Wire in accordance with local codes and dia­
gram (Fig. 11).
Relay Coil voltage is determined by control cir­
cuit voltage which must be specified when ordering
relays.
Mount relays vertically.
When crankcase heater is installed, system can
operate on a single pumpout cycle as shown in
schematic. Fig. 11.
Crankcase heater packages are given in Table
10 and corresponding relay is in Table 11. When
two heaters are usedona 5H80or 120 compressor
only one relay is required.
NOTE; Auto-suction stop valve (flooded systems only)
c — Compressor
□
CH — Crankcase Heater
HPS — High Pressure Switch
o
LLS — Liquid Line Solenoid
EPS — Low Pressure Switch
OL - Overload 0
PS — Pressure Switch
R - Relay
T — Thermostat —
Terminal Connections,
Marked
Component Connection,
Unmarked
Component Connection,
Marked
dd W iring
Fig. 11 - Wiring Schematic Single Pumpout Cycle