Blower Speed Test:
HIGH SPEED
1. Disconnect ERV from 115vac.
2. Unplug wall control wires at control module terminal block
inside ERV.
3. Plug ERV back to 115vac.
4. Attach a wire across J3–8 and J3–9 (B and G) on control
module terminal block.
5. Push in door switch. This will initiate a high-speed ex-
change.
LOW SPEED
1. Disconnect ERV from 115vac.
2. Unplug wall control wires at control module terminal block
inside ERV.
3. Plug ERV back to 115vac.
4. Attach a 3.9 K Ohm resistor between J3–8 and J3–9 (B and
G) on control module terminal block.
5. Push in door switch. This will initiate a low-speed ex-
change.
IV.
BLOWER SPEED SELECTION
Three-speed blowers are factory connected to electronic control
board on HIGH and LOW speed taps of blowers. Installer can
easily change low-speed tap to medium-speed tap so electronic
control will select between high and medium speed. Connections
can be changed at motor location (See Tables 5 and 6).
To change low speed to medium speed, proceed as follows:
1. Unplug unit 115vac.
2. Remove filters and core from ERV.
3. Locate and remove wing nut on left side of unit.
4. Slide blower assembly to the right until wire connections
are visible.
5. Locate red wire and blue wire coming from blower assem-
bly.
6. Unplug red wire from quick connect.
7. Unplug protecting cap quick connection from blue wire and
put on red wire coming from blower. The cap is a safety
insulator.
8. Connect red wire of main harness to blue wire.
9. Replace wires, blower assembly, filters and core.
a. OUTDOOR AIR THERMISTOR
When unit is not responding to wall control, check outdoor air
thermistor.
1. Remove thermistor wire from control board.
2. Take ohm reading across thermistor.
3. Refer to Table 4 for temperature/ohm relationship.
OPERATING THE ERV WITH THE EVOLUTION CONTROL
The ERV may be controlled using the Evolution system control.
The ERV may be connected using either a NIM or a 4-Zone
Damper Module. See the appropriate instructions if using the NIM
or 4-Zone Damper Module for connection instructions.
Blower interlock relay is not needed for use with the Evolution
system control. The Evolution system control will simultaneously
control the ERV and the indoor blower.
Push Button Timers may be used and are connected to the ERV as
shown in Figure 11. However, the Evolution system should be set
to continuous fan to ensure that the fresh air is circulated in the
home. In a Zoned System, at least one zone should be set to
continuous fan.
How does the ERV operate with the Evolution control?
The ventilator has four settings in heating mode and three settings
in cooling mode.
Heating:
AUTO - the ventilator selects the speed based on indoor
humidity and outdoor temp. It may cycle on/off every 30
minutes depending on humidity and outside temp.
LOW - low speed all of the time.
HIGH - high speed all of the time.
DEHUM - will only turn on if humidity is 3% over the
setpoint. The speed is determined by indoor humidity and
outdoor temp.
Cooling:
AUTO - the ventilator selects the speed based on indoor
humidity and outdoor temp. It may cycle on/off every 30
minutes depending on humidity and outside temp.
LOW - low speed all of the time.
HIGH - high speed all of the time.
Fig. 15–Floor Plan Example
A98388
BASEMENT
MASTER
BEDROOM
WASH-
ROOM
#1
WASH-
ROOM
#2
BEDROOM
#3
BEDROOM
#5
BEDROOM
#4
1320 sq ft (125 sq m)
1320 sq ft (125 sq m)
LIVING ROOM
#6
FAMILY ROOM
#10
KITCHEN
#9
LAUNDARY
ROOM
#8
WASH-
ROOM
#7
DINING ROOM
#11
1320 sq ft (125 sq m)
—11—
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Summary of Contents for ERVBBLHU1150
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