Install Instructions

Mechanical Timers Installation 99-101
The Mechanical Timer is a 2 wire “dry
contact” timer. A jumper wire must be
connected between 2 (ON) and 3 (RED).
Connect the 2 timer wires to ON and HI.
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 or Furnace Blower
HRV Terminal Block
Wire
Connector
Furnace
Terminal Strip
Furnace
Thermostat
Connecting the HRV as illustrated will ensure the air handler/furnace blower
motor is operating whenever the HRV is venting.
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.
Setting “Standby” When Using a Main Control
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.
Operating the HRV With Dry Contact Controls
A jumper must be in place between 2 (ON) and 3 (RED) on the terminal block to activate the HRV for timers and/or dry
contact controls.
Adding Dry Contact Controls
Low Speed: A jumper between 2 (ON) and 1 (LOW) initiates low speed ventilation.
High Speed: A jumper between 2 (ON) and 6 (HI) initiates high speed ventilation.
Dehumidistat: A dry contact for a Dehumidistat is connected between 2 (ON) and 10 (BLK)
 Timers mount in standard electrical boxes
 Use 3 wire 20 gauge (min.) 100 ft length (max.) low voltage wire and multiple timers individually wired back to the unit.
Caution:
 Consideration should be given to competing airflows when connecting the HRV in conjunction with an air handler/furnace blower system.
 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”.
Attention/Caution
15
Installation and Operation 20/40/60 Minute Timer: 99-DET01
Operation
Press and release the Select Button to activate a 20, 40 or 60 minute high speed override
cycle. The Light will illuminate and the unit will run on high speed ventilation for the
selected time. The Light will dim after 10 sec. for run time. The Light will flash during the
last 5 min. of the cycle. All timers connected to the unit will illuminate for the duration of
the override when the Select Button is pressed.
Status
Lights
Select Button
initiates high
speed ventilation
for 20, 40 0r 60 min.
Yellow
Red
Green
Installation:
The 99-DET01 Timers are to be surface mounted onto a wall. Multiple Timers may be installed
in a system. Once mounted, connect Yellow, Red, Green wires on side of 99-DET01 to the
terminal block on unit using 3 wire 20 gauge (min.) 100 ft length (max.).