Installation
of
Mechanical
Timers
Part
#
99-101
The Mechanical timer is a 2 wire "dry contact"
timer. A jumper wire must be connected between
ON and RED. Connect the 2 timers wires to ON
and HI. Refer to illustration.
Off
10
20
30
40
50
60
2 wire timers require a
jumper wire between ON
and RED on the terminal
block.
Connect the 2
wires from the
timer to ON and
HI
on
the
Terminal Block.
Interlocking
the
HRV
to
an
Air
handler/Furnace
Blower
Connecting the HRV as illustrated will ensure the Air
Handler/Furnace Blower Motor is operating
whenever the HRV is ventilating.
The HRV must be interlocked to the Furnace/Air
Handler with a Simplified Installation (Return/Return
Installation) and should be interlocked with a
Partially Dedicated Installation.
Wire
Connector
Furnace
Terminal
Strip
Furnace
Thermostat
HRV
Terminal
Block
CAUTION
Consideration
should
be
given
to
competing
airflows
when
connecting
the
HRV
in
conjunction
with
an
Air
Handler/Furnace
Blower
system.
Setting
“Standby”
when
using
a
Main
Control
CAUTION
Building
codes
in
some
areas
require
“fully-off”
functionality.
Check
with
your
local
building
authority
before
modifying
the
unit
to
“standby
-off”.
Unintentional
operation
of
the
HRV
by
the
end
user
may
occur
if
the
unit
is
modified
from
“fully-off”
to
“standby-off”.
The HRV will be “fully-off” when the
OFF position is selected on the Main
Control. Timers and /or other controls
will not function when the HRV is in the
OFF position.
The “fully-off” feature can be modified
to “standby-off” by adding a jumper
on the Terminal Block between 2 (ON)
and 3 (RED). “Standby” can also be
achieved by setting the main control to
the ON position and selecting speed 0*.
Timers and /or additional controls will
initiate high speed ventilation when
activated
.
*
Speed 0 is not available on
all controls
The
Terminal
Block
(located on the HRV)
17
