9
4 - Commissioning
DID301-302 Installation, Operation & Maintenance Manual (USA) (06/2015)
4/5 - Commissioning/Maintenance
4.3 Airside commissioning tables, continued..
5.1 Cleaning instructions
The chilled beam unit contains no moving or consumable parts,
therefore the maintenance requirements are limited to periodic
inspection for leakage and occasional cleaning of the heat exchanger
coil, induction grille and, where applicable, the condensate trays.
The accumulation of dust on the heat exchanger coil will eventually
restrict the airflow through the coil, reducing cooling and heating
performance.
The inspection frequency is subject to the environmental conditions
and occupancy levels, for example, environments where bed linen is
in use will require more frequent cleaning than office environments.
It is recommended that the beams be inspected on an annual basis
until a pattern is established.
5.1 Cleaning instructions
To clean the heat exchanger coil:
To access the coil, remove
the grille face by unlocking
the four (4) sliding pins which
are located in the channels
behind the grille face. The
grille is attached to the chilled
beam case by two safety
wires to prevent the face from
falling completely. Lower the
grille gently until it is hanging
vertical to the ceiling.
Using a soft nozzle
brush attachment,
gently vacuum in
the direction of the
beam’s coils to
remove any accu-
mulated dust.
After cleaning the coils, carefully raise the induction grille
back into place and slide the pins securely into the beam’s
casing and in the locked position.
To clean the beam face:
If necessary, the face of the beam and visible painted surfaces can
be cleaned using a
mild detergent diluted with warm water.
Apply
with a soft cloth, rinse and wipe dry.
To clean condensate trays (where applicable):
If necessary, the condensate drip trays can be cleaned using a
small amount of disinfectant applied with a soft cloth. Wipe dry.
5.2 Replacement parts
DID301 and DID302 chilled beams contain no serviceable or
consumable parts.
Four sliding pins (as shown here)
hold grille face in place.
Important!
Maintenance is to be performed by properly trained
and authorized personnel only!
!
Important!
Wear eye protection and gloves.
Product includes sharp edges and burrs.
!
Important!
For beams longer than 4’ in length, it is recommended
that 2 people lower the induction grille for cleaning and
maintenance.
Note
Strong or abrasive chemical detergents should not
be used as they may cause damage to the paint
finish. Only stubborn stains, if not removed by
washing, can be wiped off with white spirit, but
care is necessary to avoid affecting the gloss level
of the surface by harsh rubbing.
!
Example:
DID302; 6ft; B-nozzle, measured static pressure of 0.33 in. W.G.
C
= 113 (from table 1)
CFM = 113 x
√0.33
= 65 CFM
Table 2:
Commissioning constraints for DID301
Beam
Length
A
B
C
Nozzle Type
K
5′
4′
6′
8′
10′
9′
7′
75
30
49
88
34
57
100
39
65
119
47
77
138
54
89
157
62
102
175
69
114
The unit’s two (2) ver-
tical coils should be
vacuumed from the
opening between the
coils in the center of
the beam (shown
here)
Warning!
Return grille, though fitted with two safety wires, will
still hang down from the face of the beam approxi-
mately 6 inches if allowed to drop freely. Use care
and lower beam slowly until wires are taut.