Balancing Chart And Preset - Broan ERV200 ECM Guia De Instalacion

7. BALANCING THE UNIT (
7.4 B C
ALANCING HART AND
Use the balancing chart to convert pressure (in. w.g.) values read from magnehelic gauge to airflow (CFM) values. While balancing,
the VT9W wall control screen shows which pressure taps have to be used. See example below.
NOTE: The unit is considered balanced even if there is a difference of ± 10 CFM (or ± 5 L/s or 17 m³/h) between the two airflows.
The special design of these units, combined with the VT9W main wall control, offer many preset speeds ranges according
to the unit models.
See preset speeds table example below.
P
RESET
S .
PEEDS NO
__
01
02
03
04
05
06
07
08
09
' )
CONT D
P S T
(
RESET PEEDS ABLE
CONT
Plug magnehelic gauge
tubing to STALE airflow.
Plug magnehelic gauge
tubing to FRESH airflow.
PRESET SPEEDS TABLE
TURBO
H S
IGH PEED
(CFM@ 0.4 . . .) (CFM@ 0.2
IN W G
From 30 CFM to
From 60 to 250 75% of adjusted
TURBO speed
250
225
200
175
150
125
100
This speed must be used for HVI testing at 64 CFM @ 13°F (-25°C)
This speed must be used for HVI testing at 98 CFM @ 13°F (-25°C)
' )
D
U B
NIT ALANCING CHART
F F
LOW RESH
CFM . .
IN W G
120 0.71
125 0.67
130 0.63
135 0.59
140 0.55
145 0.51
150 0.47
FRESH reading value with
its corresponding CFM
UNIT MODEL
CONT
L S
20/40/60
OW PEED
. . .)
C
IN W G
ONTROL
(CFM@ 0.4
From 60 to 250
125 250
110 250
100 250
85 225
75 200
60 175
50 150
20
S
TALE
STALE reading value with
. . . . its corresponding CFM
IN W G
0.73
0.70
0.67
0.64
0.61
0.58
0.55
R
.
ECIRCULATION
MIN
(CFM@ 0.4
S A
IN
TALE IR
. . .)
IN W G
From 60 to 250
250
225
200
175
150
125
100
S
PEED
. . .)
W G