Publicité
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.
Interlocking the HRV/ERV to an Air Handler or Furnace
Blower
Connecting the HRV/ERV as illustrated will ensure the air handler/
furnace blower motor is operating whenever the HRV/ERV is venting.
The HRV/ERV 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/ERV 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/ERV is in the off position.
The "fully-off" feature can be modified to "standby-off" by adding a jumper on the terminal block
(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/ERV With Dry Contact Controls
A jumper must be in place between 2 (ON) and 3 (RED) on the terminal block to activate the HRV/ERV 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)
Attention/Caution
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/ERV 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/ERV by the end user may occur if the unit is modified from "fully-off" to
"standby-off".
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.
HRV/ERV Terminal Block
Wire
Connector
Furnace
Terminal Strip
between 2
Furnace
Thermostat
14
Publicité
