Install Instructions

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
airfl
ows 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