Startup
56 RT-SVX34F-EN
Table 31. Test mode states for traditional VAV units with modulating dehumidification and staged heat
TEST
STEP MODE FAN VFD COMMAND
1
ECON
4
COMP
1
COMP
2
HEAT
1
HEAT
2PUMPOUT
3
COOL
VALVE
REHEAT
VALVE
VAV
BOX
5
1 VFD SIGNAL 100% OFF 100% (10VDC) CLOSED OFF OFF OFF OFF OFF 100% 0% ON
2 VFD SIGNAL 0% OFF 0% (0 VDC) CLOSED OFF OFF OFF OFF OFF 100% 0% ON
3 MIN VENT ON IN-CONTROL MIN OFF OFF OFF OFF OFF 100% 0% ON
4 ECON TEST OPEN ON IN-CONTROL OPEN OFF OFF OFF OFF OFF 100% 0% ON
5 COOL 1 ON IN-CONTROL MIN ON OFF OFF OFF IN-CONTROL 100% 0% ON
6 COOL 2
2
ON IN-CONTROL MIN ON
2
ON
2
OFF OFF IN-CONTROL 100% 0% ON
7 COOL 3 ON IN-CONTROL MIN ON ON OFF OFF IN-CONTROL 100% 0% ON
8 REHEAT ON IN-CONTROL MIN ON ON OFF OFF IN-CONTROL 50% 50% ON
9 HEAT 1 ON IN-CONTROL MIN OFF OFF ON OFF OFF 100% 0% ON
10 HEAT 2 ON IN-CONTROL MIN OFF OFF ON ON OFF 100% 0% ON
11 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.
5. Heating will not be energized during Service Test until the 6 minute VAV Box ON timer has expired.
Table 32. Test mode states for CV units with modulating dehumidification and staged heat
TEST
STEP MODE FAN ECON
3
COMP 1 COMP 2 HEAT 1 HEAT 2 PUMPOUT
2
COOL
VALVE
REHEAT
VALVE VAV BOX
4
1 FAN ON ON MIN OFF OFF OFF OFF OFF 100% 0% ON
2 ECONOMIZER ON OPEN OFF OFF OFF OFF OFF 100% 0% ON
3 COOL 1 ON MIN ON OFF OFF OFF IN-CONTROL 100% 0% ON
4 COOL 2
1
ON MIN ON
1
ON
1
OFF OFF IN-CONTROL 100% 0% ON
5 COOL 3 ON MIN ON ON OFF OFF IN-CONTROL 100% 0% ON
6 REHEAT ON MIN ON ON OFF OFF IN-CONTROL 50% 50% ON
7 HEAT 1 ON MIN OFF OFF ON OFF OFF 100% 0% ON
8 HEAT 2 ON MIN OFF OFF ON ON 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.
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