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
4COOL 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
9RESET
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%
4COOL 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%
9RESET
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.
To Next Page
Loading...
