VENTIlATION OR AIR CyClING
(CONTINUED)
fIGURE 21 – Ventilation Wiring
90-1537
A+
B
DEH
REMO
TE
HV
AC
EQUI
P
VEN
T
Cf
Gs
Gh
W-
DH
Rf
DAM
PER
S
R
C
W
Y
Y
W
G
C
R
G
SENSO
R
OD
T
FL
OA
T
SWIT
CH
DEHUMIDIFIER
CONTROL BOARD
24 VAC
(10 VA min)
TRANSFORMER
THERMOSTAT
HVAC EQUIPMENT
OPTIONAL OUTDOOR
TEMPERATURE SENSOR
6" NORMALLY
CLOSED DAMPER
FUNCTIONS IN
AIR CYCLING
MODE IF
DAMPER NOT
INSTALLED
DETERMINE VENTIlATION REQUIREMENTS
See page 17 for outdoor
temperature sensor installation.
1 . The MINIMUM ventilation requirement is calculated using
ASHRAE 62 .2 .
ASHRAE Airflow in CFM = [House Area in Sq . Ft . x 0 .01]
+ [(Number of Be1) x 7 .5]
Notes: Use ‘Number of Be1’ or the ‘Number of
Occupants’, whichever is larger .
2 .
Table 3
shows calculated airflow values to the nearest 5 CFM .
3 . Record the Required CFM . __________
CAlCUlATING AIRflOW REQUIREMENT
TAblE 3 – CfM Required
House Sq. ft.
Number of bedrooms
2
3
4
5
6
1000
35
40
50
1500
40
45
55
60
70
2000
45
50
60
65
75
2500
50
55
65
70
80
3000
55
60
70
75
85
3500
75
80
90
15
