Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual
Rev. 2.3 Aug. 19, 2014
- 17 -
4.3.
Windsor Series Controls & Other 24 V Control Options
All Windsor Series and other 24V controls (sold separately) connect to the 24V (10-wire)
removable terminal block. See Section 10 for wiring diagrams.
Mix and Match Controls.
Because the unit circuit board is equipped with separate, removable terminal
blocks to accommodate both ES Series and Windsor Series controls, both types of control may be used
in the same installation.
4.3.1.
Standard Dehumidistat (Part # DSTAT-1)
With this basic control the system is designed to operate on a low speed for continuous ventilation. The
dehumidistat will switch the HRV to high speed when the relative humidity of the air around it exceeds
its set point. When the indoor humidity falls below the set point, the machine drops out of high speed.
The standard dehumidistat can be complemented with Win-20 timers or ES Series controls. See Section
10.15 for wiring diagram.
4.3.2.
Windsor Control (Part # WIN-1)
The Windsor Dehumidistat Control provides the same humidity control as the Standard Dehumidistat,
with the added functionality of a
3-position switch
from which the operator can select three operating
modes. See Section 10.16 for wiring diagram.
1.
OFF - disables all functions.
2.
STANDBY - HRV is on standby (intermittent). High speed ventilation on demand from the
dehumidistat, or remote timers. i.e. Automatically resumes Standby mode after demand is
met.
3.
CONTINUOUS - continuous low speed ventilation. HRV cycles to high speed on demand
from the dehumidistat or timers. i.e. Automatically resumes Continuous mode after demand
is met.
Also, the Windsor Control has a two position switch from which you can choose:
Constant
- locks the motors in High speed
Standard –
normal operating mode enables functions 2 and 3 above.
While it offers several convenient features and operating modes, the Windsor Control can be combined
with the ES –T1 20/40/60 or WIN-20 timer to further customize system functions.
4.3.3.
Windsor Timer (WIN-20)
Install in bathrooms, kitchens, workstations or other locations where high-speed ventilation control is
needed. The machine will run at high speed for twenty (20) minutes and then return to its previous
operating condition.
Up to six (6) timers
can be connected in parallel. See Section 10.17 for wiring
diagram.
4.3.4.
Remote On/Off Switching and Spring Wound Timers
Basic RNC control can be achieved using a standard, DEDICATED light switch. Mechanical (spring-
wound) timers, CO
2
, or occupancy sensors may also be used. See Section 10.18 for wiring diagram.
