Healthy Climate Solutions ERV5-130, Installation Instructions Manual

Page: 54 / 60

54
NO
YES
Terminal
block LED flashes
rapidly for 3
seconds
NO
SYSTEM
POWER ON
Thermistor cable not
connected into
controller board
NO
YES
Self−test mode : fan will cycle for 6 seconds in each
speed from speed 1 to 5; damper will be ventilation posi-
tion during speed cycling. After speed 5, damper defrost
models will cycle to recirculation, ventilation, then back to
recirculation or fan defrost models will cycle to exhaust
fan only, ventilation, then off.
Terminal
block LED flashes
to indicate
revision
YES
Terminal
block LED flashes
during self test,
3 sec. ON and
0.5 sec. OFF
NO
Upon self-test
completion, normal
HRV/ERV operation is
available.
YES
NOTES:
1) System includes HRV/ERV unit and terminal block.
2) System power ON means ERV/HRV unit plugged into 120VAC.
3) Dry contact is energized when HRV/ERV is in ventilation mode and
results in a closed connection between terminal 7 (COM) and 8 (NO)
of the terminal block
4) Low speed refers to speed 1.
5) High speed refers to speed 5.
6) Ventilation position refers to damper open to outdoor air.
7) Recirculation position refers to damper closed to outdoor air.
8) No fan operation results in damper in recirculation position.
9) Humidity disable results in 4 consecutive readings of outdoor tem-
perature greater than 60ºF (15ºC).
2
Failed
HRV/ERV
controller
Normal
operation
issue detected;
action required
KEY
Damper moved
between RECIRC
and VENT
Failed
Damper
NO
YES
or faulty thermistor
operation
verified
Figure 54. Self-Test Operational Flowchart
NO
YES
Defrost mode
enabled
Complete Defrost
mode. Refer to
defrost operation
logic for schedule
HRV/ERV
unit set to standby
mode
Recirculation mode
(see note 3) is
overridden to
ventilation mode to
execute the humidity
disable feature.
(Damper in ventilation
for 3 minutes once
every 6 hours.) Fan
continues in current
speed.
NO
Fan will run in low
speed ventilation for
3 minutes once
every 6 hours.
Humidity
override not
disabled
YES
Outdoor humidity sampling
automatically runs HRV/ERV fan
in LOW speed ventilation for 3
minutes every 6 hours. This
commences and resets upon
power up of HRV/ERV.
3 4
YES
NO
Is
external
control operating
HRV/ERV fan at
HIGH speed
YES
Humidity sampling
may execute
during HIGH
speed override or
extend HIGH
speed override up
to an additional 3
minutes.
NO
Fan continues to run
in LOW speed for 3
minutes once every
6 hours.
Four
consecutive
temperature readings
60ºF (15ºC) and
above
YES NO
Humidity override
to high speed is
disabled
YES
NO
Humidity override
to high speed
enabled
NOTES:
1) Humidity disable is an automatic
operation which cannot be overridden by
any control.
2) When Defrost mode is enabled (HRV),
the damper is in recirculation mode
(damper closed to outdoor air).
3) Recirculation mode is only available on
recirculating defrost models (HRV3−095,
HRV3−150−TPD, HRV5-150, HRV5-200-TPD,
HRV5-HEX095-TPD, HRV5-270-TPD-ECM,
ERV5-150-TPD, ERV5-175-TPD and ERV5-130).
Four
consecutive
temperature readings
below 60ºF
(15ºC)
operation
verified
issue detected;
action required
KEY
HRV/ERV
unit set to recirculation
mode (see note 3)
Figure 55. Dehumidistat Disable
No external control can
override this mode speed
until cycle is complete,
unless HRV is already in a
recirculation mode.
YES
NO
Is R2000
DIP switch in ON
position
NO
YES
Damper in recirculation mode^, fan
speed 4 for 3 minutes, then
damper in ventilation mode, fan
speed is default for 25 minutes.
YES
Defrost mode
complete
?
Fan speed, damper
position, default to
previous mode prior to
commencement of
Defrost mode.
4
Thermistor
measures outdoor
temperature
BELOW
27ºF (−3ºC)
Damper in recirculation mode^, fan
speed 4 for 4.5 minutes, then
damper in ventilation mode, fan
speed is default for 17 minutes.
Damper in recirculation mode^, fan
speed 4 for 7 minutes, then
damper in ventilation mode, fan
speed is default for 15 minutes.
BELOW
−4ºF (−20ºC)
BELOW
−31ºF (−35ºC)
YES
YES
NO
NO
NO
operation
verified
issue detected;
action required
KEY
^ Recirculation mode is not available on
HRV3−195.
HRV: Defrost mode is initiated from 27ºF
(−3ºC) and below. Damper in recirculation^
mode at fan speed 4 for 4-1/2 minutes,
then the HRV ventilates for 25 minutes.
ERV: Defrost mode is initiated from 27ºF
(-3ºC) and below. Damper in recirculation^
mode at fan speed 4 for 8-1/2 minutes,
then ERV ventilates for 30 minutes.
Figure 56. ERV/HRV Defrost Mode