7.3 Further diagnostic options
7.3.1 Use of multimeters to control set-
point values and feedback signals
With a multimeter, both the setpoint signal (terminal w
against terminal 1) and the actual value signal (terminal
U against terminal 1) can be measured electrically.
Using the following formulas, the associated setpoint
value and actual value volume flow rates can be calcu-
lated and thus checked:
Note:
depending on the selected setting on the V
min
and
Vmax
potentiometers, the setpoint value voltage and
actual voltage may well be different, even if they are
correctly regulated.
Example 1: TVR 400/Easy
Nominal volume flow rate V
nom
- 6030 m³/h
Setting V
min
- 0%
Setting V
max
- 100%
Voltage terminal w
- 5.14 V
Voltage terminal U
- 5.35 V
Billing solution:
V
ref
: 5.14 V / 10 V
×
(6030 m³/h - 0 m³/h) + 0 m³/h
= 3099 m³/h
V
actual
: 5.3 V / 10 V
×
6030 m³/h = 3226 m³/h
Deviation = 3226 - 3099 = 127 m³/h
≈
4%
Example 2: TVR 400/Easy
Nominal volume flow rate V
nom
- 6030 m³/h
Setting V
min
- 40%
Setting V
max
- 800%
Voltage terminal w
- 8.24 V
Voltage terminal U
- 6.93 V
Billing solution:
V
ref
: 8.24 V / 10 V
×
(0.8
×
6030 m³/h - 0.4
×
6030
m³/h) + 0.4
×
6030 m³/h = 4399 m³/h
V
actual
: 6.93 V / 10 V
×
6030 m³/h = 4179 m³/h
Deviation = 4179 - 4399 = -220 m³/h
≈
-5%
7.3.2 Use of adjustment devices
The use of an adjustment device is not permitted for the
Easy controllers. Depending on the delivery period and
factory preparation, the values displayed on the control
component cannot be clearly assigned as for the orig-
inal equipment or for substitute controllers.
7.3.3 Adjustments sticker
The adjustments sticker documents the factory testing,
the settings and the most important order data of the
VAV terminal unit and the control component.
Fig. 23: Adjustments sticker
The information is required as part of the technical sup-
port provided by the TROX service or for the ordering of
replacement parts.
7.3.4 Ordering replacement controllers
When ordering an Easy replacement controller, the
device type and nominal size/dimensions are required
when ordering. Customer-specific operating values for
Easy controllers are not set at the factory. The informa-
tion can be found, for example, in the adjustments
sticker described in the previous chapter.
Example of order information: replacement controller
type Easy for VAV terminal unit TZ-SILENZIO in dimen-
sion 200: TZ-SILENZIO 200/Easy
Note:
for some VAV terminal unit types, Easy replace-
ment controllers can be used regardless of the dimen-
sions of the basic units.
This only applies to types TVR, TVJ, TVT and TVZ.
Examples:
a replacement controller for the TVJ/Easy
type can be used both on the nominal width of 300x100
and on all other dimensions of the TVJ. A TVR/Easy
replacement controller can be used on the 250, as well
as all other dimensions of the TVR.
Troubleshooting
Further diagnostic options > Ordering replacement controllers
Control component Easy for VAV terminal units
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