Trane Voyager Commercial - Page 69

RT-SVX34C-EN 69
Startup
Be sure to complete all of the procedures described in this section before starting the unit for the
first time.
40
CPR 1 **
CPR 2***
CPR 1, 2
Fan #2
Fan #3, 4
50
70
Fan #2
Fan #3, 4
20
60
Fan #2
Fan #3, 4
-30
50
50
CPR 1**
CPR 2, 3****
CPR 1, 2, 3
Fan #2
Fan #3, 4
20
60
Fan #2
Fan #3, 4
-10
55
Fan #2
Fan #3, 4
-30
50
Notes:
1. The Compressor(s) listed under each step are the operating compressors. On 27.5 to 35 Ton units with Lead/Lag, CPR1
will alternate but the fan sequence will remain the same. On 40 & 50 Ton units with Lead/Lag, the compressor(s) in step
2 & 3 will alternate and the fan sequence listed for that step will be in operation.
2. Conventional thermostat sequence: Y1=CPR1, Y2=CPR2 (40 CPR 2 & 50 CPR 2,3), Y1 + Y2 = CPR1,2 (40 CPR 1,2 & 50
CPR 1,2,3)
3. During active dehumidification all compressors will be staged "On".
3. During active dehumidification all compressors will be staged "On".
For units equipped with four condenser fans (40 and 50 Ton), the condenser fan output states will be controlled based on
the O/A temperature. If O/A is above 85°F, all condenser fan outputs will be energized. If O/A falls below 80°F, Output B
will de-energize and will not re-energize again until the O/A rises above 85°F.
For units configured with three condenser fans (27.5 to 35 Ton), a maximum of two condenser fans will energize. Output
A will energize above 85°F and de-energize when the O/A falls below 80°F; Output B will remain de-energized during
active dehumidification. If O/A falls below 80°F, Output A will de-energize and will not re-energize again until O/A rises
above 85°F
* Single circuit, manifolded compressors pair.
** First Stage, Number one refrigeration circuit, Standalone compressor is “On”.
*** First Stage is “Off”, Number two refrigeration circuit, standalone compressor is "On"
****First stage is “Off”, Number two refrigeration circuit, manifolded compressor pair is "On" operating simultaneously
Figure 42. Condenser Fan Location
Table 25. Condenser Fan/Compressor Sequence
Unit Size Compressor Staging Sequence Condenser Fan Output
O/A Temp.
(°F)
(Tons) Step 1 Step2 Step 3 Output A Output B Fans "Off"