Economizer Start-Up; Compressor Start-Up; Scroll Compressors; Gas Heat Units - Trane YSC060 Installation Operation & Maintenance

Economizer Start-Up

ReliaTel Control
Using the Service Test Guide in Table
6, momentarily jump across the Test 1
& Test 2 terminals on LTB1 one time to
start the Minimum Ventilation Test.
ROTATING PARTS!
UNIT STARTS AUTOMATICALLY
Verify that the dampers stroked to the
minimum position.
ReliaTel Control
Momentarily jump across the Test 1 &
Test 2 terminals on LTB1 one addi-
tional time if continuing from previous
component start-up or until the desired
start-up component Test is started.
Verify that the dampers stroked to the
full open position.
To stop the SERVICE TEST, turn the
main power disconnect switch to the
"Off" position or proceed to the next
component start-up procedure. Re-
move electro mechanical test mode
connections (if applicable).

Compressor Start-Up

1. Attach a set of service gauges onto
the suction and discharge gauge
ports for each circuit. Refer to the re-
frigerant circuit illustration in the
Service Facts.
ReliaTel Control
Momentarily jump across the Test 1 &
Test 2 terminals on LTB1 one additional
time if continuing from previous compo-
nent start-up or until the desired start-
up component Test is started.
32
Start Up

Scroll Compressors

a. Once each compressor has started,
verify that the rotation is correct. If a
scroll compressor is rotating back-
wards, it will not pump and a loud
rattling sound can be observed.
b. If the electrical phasing is correct,
before condemning a compressor,
interchange any two leads (at the
compressor Terminal block) to check
the internal phasing. Refer to the il-
lustration in Figure 5-1 for the com-
pressor terminal/phase identifica-
tion. If the compressor runs back-
ward for an extended period (15 to
30 minutes), the motor winding can
overheat and cause the motor wind-
ing thermostat to open.
c. Check the compressor oil levels.
The oil level in each compressor
sight glass should be 1/2 to 3/4 full
when they are "Off".
Note:
The scroll compressor uses Trane OIL-
42 without substitution. The appropriate
oil charge for a 9 and 10 Ton scroll
compressor is 8 pints ( 3.8 liters). For a
14 and 15 Ton scroll compressor, use 14
pints ( 6.6 liters).
2. After the compressor and condenser
fan have started and operated for
approximately 30 minutes, observe
the operating pressures. Compare
the operating pressures to the oper-
ating pressure curve in the Service
Facts.
3. Check system superheat. Follow the
instruction listed on the superheat
charging curve in the Service Facts.
Superheat should be within ±5 F (-
15C) of the superheat chart value.
4. Repeat steps 1 through 4 for each
refrigerant circuit.
5. To stop the SERVICE TEST, turn the
main power disconnect switch to
the "Off" position or proceed to the
next component start-up procedure.
Remove electro mechanical test
mode connections (if applicable).

Gas Heat Units

Open the main disconnect switch to
shut the unit off and to reset the RTRM.
Follow the Test Guide in Table 6 to
start the unit in the heating mode.
ReliaTel Control Momentarily jump
across the Test 1 & Test 2 terminals
on LTB1 one additional time if continu-
ing from previous component start-up
or until the desired start-up compo-
nent Test is started.
RT-SVX31A-EN