21
20/40/60-
MINUTE PUSH
-
BUTTON TIMER
:
This remote illuminated switch is typically installed in bathrooms, kitchen and laundry room to provide
20, 40 or 60 minutes of high speed ventilation at the push of a button.
7.2 O
PTIONAL
C
ONTROL
7.0
Control Devices (cont’d)
7.3 O
THER
F
EATURES
F
URNACE INTERLOCK
(for forced air heating system)
The furnace fan can be interlocked so that it will run simultaneously with the ERV or HRV to ensure proper
distribution of fresh air throughout the house.
P
ERMANENT MEMORY
Our electronic controls have a default memory feature in the event of a power outage. Even the date of the last
service reminder is maintained as a convenience to the homeowner.
C
ONTROL UPGRADES
All controls can be used on any unit, so a Economy control can be upgraded to the Value in the future.
7.4 S
PECIAL
C
OLD
W
EATHER
TBI M
ODE FOR
ERV
S
The enthalpic core installed in ERVs requires extra protection when the outside temperature drops
below -15°C (5°F).
A special operating mode called TBI (Time-Based Intermittent) is activated under these conditions.
Characteristics of cold weather TBI mode
• activated when the outside temperature drops below -15°C (5°F).
• 20/40 cycle (20 minutes LOW speed followed by 40 minutes OFF).
• usual control of air supply via the main wall control is suspended (except for the OFF position).
• optional control (20 minute push-button) retain its temporary high speed activation capability.
• deactivated when the outside temperature warms up higher than -15°C (5°F).
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