Analog Controls; General; Electonic Controls Installation - Trane VariTrane Installation/ Owner Programming

General

Electronic control systems offer
pressure-independent operation for use
on all single-duct and fan-powered VAV
units (see Figure 3).
The electric air damper used with this
control system has a stroke time (from
open to close) of 90 seconds.
The pressure-independent system will
control room temperature by adjusting
airflow into the space as a function of
zone temperature.
Figure 3 –Electronic Interface Circuit
Boards
Electrical Data
INPUT :
24 VAC, 50 VA maximum
OUTPUT :
1 st Stage – 24 VAC, 10 VA magnetic
contactors/12 VA mercury contactors
nd
2 Stage – 24 VAC, 10 VA magnetic
contactors/12 VA mercury contactors
rd
3 Stage – 24 VAC, 10 VA magnetic
contactors/12 VA mercury contactors
VAV-SVX03A-EN
Analog
Controls
Cfm Requirements
Control Unit
Type Size
4
5
6
Analog 8
Electronic 10
12
14
16
24x16
Notes:
1. Minimum flow and maximum flow settings must have at least a 0.05 Delta P flow sensor signal difference.
2. Flow rings are provided with all unit sizes.
3. A minimum setting of zero is permissible, except for VCEF units.
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure the power cannot be inadvertently
energized. Failure to disconnect power before servicing could result in death or
serious injury.
Electronic Controls Installation
Check the wiring on the unit with the wiring diagram and wiring information label.
Insure that all jumpers are to the proper location and that the actual unit wiring
matches the wiring diagram and wiring label information. See Figure 4.
Units with electronic control options must use Trane zone sensors to be compatible
with the unit circuitry. The analog zone sensor electronics are designed
specifically to operate with the Trane electronic controls; other zone
sensors will not work properly with this unit. The Trane analog zone sensor
must be used in conjunction with these electronic controls. Typically, field
controls wiring include the following:
1. 24 VAC-powered connection to terminals TB1-1 and TB1-2. These are stab terminals
marked one and two on the five-pole terminal strip located in the corner of the
circuit card.
2. Zone sensor connections are to TB1-3,4,5.
3. Heater contact wiring is normally installed in the factory. Should field installation be
required, each wiring diagram shows the field alternate wiring requirements.
Maximum Minimum
Cfm Flow Cfm Flow
Setting Setting
38-225 0,38-225
63-350 0,63-350
73-500 0,73-500
134-900 0,134-900
215-1400 0,215-1400
300-2000 0,300-2000
408-2890 0,408-2890
536-3790 0,536-3790
1096-8000 0,1096-8000
Minimum Heating
Cfm Flow Setting
(VCEF Only)
45-225
70-350
100-500
180-900
280-1400
400-2000
578-2890
758-3790
1600-8000
7