S&P TRC1600 Installation, Operation & Maintenance Manual page 14

INSTALLATION
ERV
CAUTION
Make sure the control
provides no voltage or current
at its output terminals.
CAUTION
Supply only 24VAC (not VDC)
from a Class II Power Source.
NOTE: Because the
ERV's Motor Starters
will only be operating
once the Dampers are
open, the power draw of the
Damper Actuators is allowed
to be as much as 35VA while
opening (including power
draw of the external control
system, if any). However, the
power draw of the fully-
opened (stalled) Actuators
(and external control system
if any) must be less than 8VA.
Most damper actuators have
much lower power draws.
14 SOLERPALAU-USA.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
TRC1600
AN EXTERNAL CONTROL USING UNIT'S
24VAC POWER SUPPLY
24VAC Available at Terminals 1 & 2
MPU
Connect Terminals 2 & 3
Connect Terminals 4 & 5
Image E from Filename: Control Connections HE2XRT and larger
FIGURE D AN EXTERNAL CONTROL USING UNIT'S 24VAC POWER SUPPLY
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Friedlander
E. Control System with 2 Non-Powered Relay Contacts: 5/5/2011
Use this schematic if the external control system provides no voltage or current at its output contacts.
Install jumper (provided) between terminals 2 and 3. Connect one side of each of the output contacts
to Terminal 1. Connect the other side of the output contact to control the SA Blower to Terminal 4,
and the output contacts to control the EA Blower to Terminal 5.
A SWITCH OR NON-POWERED
CONTROL USING UNIT'S 24VAC POWER
SUPPLY
Connect Terminals 2 & 3
FIGURE E A SWITCH OR NON-POWERED CONTROL USING UNIT'S 24VAC POWER SUPPLY
Image B from Filename: Control Connections HE2XRT and larger
F. Control System Sending Two 24VAC "On" Signals From an External Power Source: JUL14.dwg
Friedlander
Make sure the jumper is NOT installed between Terminals 2 & 3. Now you safely can apply one of
5/5/2011
the 24VAC signals to Terminals 3 & 4 to operate the ERV's isolation relay for the Fresh Air Blower.
Apply the second 24VAC signal to Terminals 3 & 5 to operate the ERV's isolation relay for the
Exhaust Blower (make sure the polarity of each wire connected to Terminal 3 is the same).
AN EXTERNAL CONTROL USING UNIT'S
24VAC POWER SUPPLY
24VAC Available at Terminals 1 & 2
MPU
Connect Terminals 2 & 3
Connect Terminals 4 & 5
Image E from Filename: Control Connections HE2XRT and larger
FIGURE F TWO EXTERNAL RELAY CONTACTS SUPPLYING 24VAC FROM AN EXTERNAL SOURCE
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Friedlander
5/5/2011
G. Control System Operating Isolation Dampers with End Switches: Use Isolation Dampers with
electrically separate end switches. The end switches are used to separately control the ERV unit's
Isolation Relays. This ensures that each damper is open before the respective blower starts up.
UNIT INTERNAL CONTROL WIRING
(SIMPLIFIED)
Unit's 24VAC
Power Supply
1
2
3
4
Isolation Relay Coil (Fresh Air)
C
5
Isolation Relay Coil (Exhaust Air)
C
UNIT INTERNAL CONTROL WIRING
(SIMPLIFIED)
Unit's 24VAC
Power Supply
1
2
3
4
Isolation Relay Coil (Fresh Air)
C
5
Isolation Relay Coil (Exhaust Air)
C
UNIT INTERNAL CONTROL WIRING
(SIMPLIFIED)
Unit's 24VAC
Power Supply
1
2
3
4
Isolation Relay Coil (Fresh Air)
C
5
Isolation Relay Coil (Exhaust Air)
C
®