Startup
58
RT-SVX34F-EN
Table 35. Test mode states for CV units with modulating dehumidification and modulating heat
TEST
STEP
MODE
FAN
ECON
3
COMP 1 COMP 2
HEAT
OUTPUT
PUMPOUT
2
COOL
VALVE
REHEAT
VALVE
VAV BOX
4
1
FAN ON
ON
MIN
OFF
OFF
OFF
OFF
100%
0%
ON
2
ECONOMIZER
ON
OPEN
OFF
OFF
OFF
OFF
100%
0%
ON
3
COOL 1
ON
MIN
ON
OFF
OFF
IN-CONTROL
100%
0%
ON
4
COOL 2
1
ON
MIN
ON
1
ON
1
OFF
IN-CONTROL
100%
0%
ON
5
COOL 3
ON
MIN
ON
ON
OFF
IN-CONTROL
100%
0%
ON
6
REHEAT
ON
MIN
ON
ON
OFF
IN-CONTROL
50%
50%
ON
7
HEAT 1
ON
MIN
OFF
OFF
50%
OFF
100%
0%
ON
8
HEAT 2
ON
MIN
OFF
OFF
100%
OFF
100%
0%
ON
9
RESET
1.
For 27.5-35T units, both compressors will be energized during the Cool 2 Step. For 40-50T units, only Compressor 2 will be energized during the Cool
2 Step.
2.
The Reheat Pumpout relay will be energized any time the Reheat circuit is energized in active Cooling Mode.
3.
For units with Statitrac installed, the Exhaust Damper will track the Economizer position during Service Test Mode and the Exhaust Fan will be
energized once the Economizer rises above the Exhaust Enable Setpoint.
4.
Heating will not be energized during Service Test until the 6 minute VAV Box ON timer has expired.
Table 36. Test mode states for SZ VAV units with modulating dehumidification and modulating heat
TEST
STEP
MODE
FAN
VFD COMMAND
1
ECON
4
COMP 1 COMP 2
HEAT
OUTPUT
PUMPOUT
3
COOL
VALVE
REHEAT
VALVE
1
FAN ON
ON
58% (0 VDC)
MIN
OFF
OFF
0%
OFF
100%
0%
2
ECONOMIZER
ON
58% (0 VDC)
OPEN
OFF
OFF
0%
OFF
100%
0%
3
COOL 1
ON
86% (6.67 VDC)
MIN
ON
OFF
0%
IN-CONTROL
100%
0%
4
COOL 2
2
ON
100% (10 VDC)
MIN
ON
2
ON
2
0%
IN-CONTROL
100%
0%
5
COOL 3
ON
100% (10 VDC)
MIN
ON
ON
0%
IN-CONTROL
100%
0%
6
REHEAT
ON
80% (5.24 VDC)
MIN
ON
ON
0%
IN-CONTROL
50%
50%
7
HEAT 1
ON
100% (10 VDC)
MIN
OFF
OFF
50%
OFF
100%
0%
8
HEAT 2
ON
100% (10 VDC)
MIN
OFF
OFF
100%
OFF
100%
0%
9
RESET
1.
For Traditional VAV units, the VFD Command when “In-Control” will be controlled based on Supply Air Pressure Requirements. For SZ VAV units, the
VFD Command will be at discrete points during Test Mode.
2.
For 27.5-35T units, both compressors will be energized during the Cool 2 Step. For 40-50T units, only Compressor 2 will be energized during the Cool
2 Step.
3.
The Reheat Pumpout relay will be energized any time the Reheat circuit is energized in active Cooling Mode.
4.
For units with Statitrac installed, the Exhaust Damper will track the Economizer position during Service Test Mode and the Exhaust Fan will be
energized once the Economizer rises above the Exhaust Enable Setpoint.
