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SEPARATE THE VAPORIZER FROM THE CON- DENSER — The VFD mounting brackets (Fig. 24) extend beyond the outboard edge of the vaporizer. The vaporizer extends beyond the perimeter of the condenser tubesheet.
1.Cut the vaporizer hot gas supply line near the oil concen- trator (Fig. 24).
2.Cut the vaporizer hot gas return line (Fig. 24).
3.Cut the bearing oil drain line near the oil sump (Fig. 25).
4.Unbolt the vaporizer vent line flange shown in Fig. 25.
5.Cut the oil supply line as shown in Fig. 25.
6.Cut the oil reclaim line as shown in Fig. 25.
7.Disconnect all wires and cable leads to the vaporizer assembly (see Fig 26) including:
a.oil sump temperature sensor
b.oil sump pressure cable and oil pressure leaving filter cable
c.oil reclaim cable
d.vaporizer heater cable in the vaporizer heater junction box
e.oil pump cable
f.oil sump heater conduit (Fig. 24)
g.vaporizer temperature sensor
8.Rig the vaporizer with the lifting points on the vaporizer mounting bracket and remove the four bolts that secure it to the condenser (Fig. 24).
9.Cover all openings.
NOTE: To reassemble, follow steps in reverse order. Connect sensors and cables after major components have been secured to reduce the risk damaging them.
VFD Installation
1.Install terminal box frame mounting studs into tapped holes using short threaded end (see section
2.Install thermal insulators, insulation frame assembly, and terminal box frame prior to attaching motor power cables.
3.Torque motor terminals to 45 to 55
4.There may be 1 or 2 motor power cables per terminal identified as T1, T2 and T3. Position motor end lugs on terminal studs with Belleville washer located against the front terminal lug with the convex side facing toward the front terminal nut. Clinch the two cables together with wire ties before tightening terminal nuts. Install front ter- minal nut finger tight. Hold front terminal nut stationary while tightening rear terminal nut to 45 to 50
5.Check all terminal connections for proper installation.
IMPORTANT: Do not insulate terminals until wiring arrangement has been checked and approved by Carrier
VAPORIZER
MOUNTING
BOLTS
VAPORIZER HOT GAS SUPPLY LINE
a23-1573
VFD MOUNTING
BRACKETS
VAPORIZER HEATER JUNCTION BOX
OIL PRESSURE REGULATOR ISOLATION VALVE
OIL SUMP
HEATER JUNCTION
BOX
OIL RECLAIM ACTUATOR
VAPORIZER
MOUNTING
BOLTS
VAPORIZER
REFRIGERANT
RETURN LINE
OIL PUMP
JUNCTION BOX (HIDDEN)
Fig. 24 — Oil Concentrator Removal
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