4 - Commissioning
8
4.1 Waterside commissioning
Fully purge the complete hydronic system of air prior to
commissioning.
Carefully inspect the system for leaks, paying particular
attention to the connections.
Carefully inspect flexible hose, if applicable, for leaks.
Factory-provided
flexible hose shown (not provided on
all orders).
4.2 Airside commissioning
The primary air flow rate is determined by measuring the static
pressure in the primary air chamber and referring to the calibration
chart label provided on each beam or by calculating the volume by
using the formula and tables in section 4.3.
To measure static pressure:
Locate the pressure tap fitted in the nozzle plate at
the pipe connection end of
the beam (see image). To
reach the tap, it is not nec-
essary to lower induction
grille, but it can be lowered
if preferred. Remove cap.
Attach a measuring gauge
(as shown here):
4.3 Airside commissioning tables
The primary air volume in CFM can be calculated with this formula:
CFM = K x √ΔP
CFM
=
primary airflow (CFM)
K
=
constant - read from tables below
ΔP
=
static pressure measured in primary air
chamber (in. W.G.)
DID301-302 Installation, Operation & Maintenance Manual (USA) (06/2015)
Open
pressure
cap
Min. bending radius
3″
2
½
″
Flexible hose
For water connection ½˝ NPT
Female swivel thread for
connection to beam
Male fixed thread for
connection pipe header
Important!
Commissioning is to be performed by properly
trained and authorized personnel only!
!
Important!
Wear eye protection and gloves.
Product includes sharp edges and burrs.
!
Note
The chilled beam is not provided with any water flow
control or measuring devices, therefore the pipe work
system should be fitted with sufficient balancing aids
to enable adjustment of the flow rate.
Note
Do not attempt to read the total discharge airflow rate
using a hood or any other device that adds down-
stream pressure to the beam, as it will reduce the
amount of induction and give false readings.
The total air flow (p induced) cannot be
measured.
Note
The constraints detailed in the following tables are
for standard TROX chilled beams. For chilled beams
with non-standard nozzle configurations, contact
Trox USA.
Table 1:
Commissioning constraints for DID302
Open cap outlined for
easier viewing
Beam
Length
A
B
C
Nozzle Type
K
5′
4′
6′
8′
10′
150
9′
7′
59
97
175
69
114
200
79
130
238
93
154
275
108
179
313
123
203
351
138
227