38 RT-SVX26R-EN
Start Up
Economizer Start-Up
Using the Service Test Guide in Table 12, p. 37,
momentarily jump across the Test 1 and Test 2 terminals
on LTB1 one-time to start the Minimum Ventilation Test.
1. Set the minimum position setpoint
for the economizer
to the required percentage of minimum ventilation
using the setpoint potentiometer located on the
Economizer Control (ECA).
The economizer will drive to its minimum position
setpo
int, exhaust fans (if applicable) may start at
random, and the supply fan will start when the
SERVICE TEST is initiated.
The Exhaust Fan will start anytime the economizer
da
mper position is equal to or greater than the exhaust
fan setpoint.
2. Verify that the dampers
stroked to the minimum
position.
3. Momentarily jump across the Test 1 and Test 2
termi
nals on LTB one additional time if continuing
from previous component start-up or until the desired
start-up component Test is started.
4. Verify that the dampers stroked to the
full open
position.
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).
Compressor Start-Up
1. Attach a set of service gauges onto the suction and
discharge gauge ports for each circuit. Refer to the
refrigerant circuit illustration in the Service Facts.
Using the Service Test Guide in Table 12, p. 37,
continue the Service Test start-up procedure for each
compressor circuit.
Momentarily jump across the Test 1 and Test 2
term
inals on LTB1 one additional time if continuing
from previous component start-up or until the desired
startup component Test is started.
Scroll Compressors
a. Once each compressor has started, verify that the
rotation is correct.
If wired correctly the suction
pressure should drop and the discharge pressure
should rise. If a scroll compressor is rotating
backwards, it will not pump and a loud rattling
sound can be observed.
b. If the electrical phasing is correct, before
co
ndemning a compressor, interchange any two
leads (at the compressor Terminal block) to check
the internal phasing. Refer to the following
illustration for the compressor terminal/phase
identification. Do not allow the compressor to
operate backwards for more than 5 seconds.
Operation for a period of time longer than this will
result in compressor damage. Copeland (Alliance)
will experience failure also. If the compressor runs
backward for an extended period, the motor
winding can overheat and cause the motor winding
thermostat to open.
Note: The Copeland, SSA and SPA scroll compressors for
R-410A units use Trane OIL00094. The correct oil for
Trane CSHD is Trane OIL00079 or OIL00080.
Compressor types are listed in Table 13, p. 38. The
appropriate oil charge is listed in Table 14, p. 39.
Figure 33. Compressor terminal box
Table 13. Compressor types
Tonnage C1 C2
YS*150 ZP83KCE ZP42K5E
YH*150 ZP91KCE ZP38K5E
YH*150 Reheat ZP67KCE ZP67KCE
YS*155 CSHD105 SPA050
YS*180 CSHD110 ZP54K5E
YH*180 ZP104KCE ZP49K5E
YH*180 Reheat ZP83KCE ZP83KCE
YS*175 CSHD120 SPA044
YS*210 CSHD110 ZP54K5E
YH*210 ZP122KCE ZP54K5E
YH*210 Reheat CSHD089 ZP83KCE
YS*200 CSHD142 SSA083
YS*240 CSHD155 ZP76KCE
YH*240 CSHD142K*0M ZP61K5E
YH*240 Reheat CSHD120 CSHD120
YS*250 CSHD120 CSHD120
YS*300 CSHD161 ZP83KCE
YH*300 ZPT122K5E ZP122KCE
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