Ingersoll-Rand ReliaTel, Manual, Page: 53 / 176

RT-SVD03L-EN 53
N No otte e:: TWE240E3R4AB is a SZVAV with an oversized
motor.
Oversized motors are only factory-installed
options. Multi-speed air handlers m
mu usstt be paired
with an electromechanical outdoor unit. SZVAV
air handlers m
mu usstt be paired with ReliaTel
™
controlled outdoor units.
Figure 44. Wiring and configuration - multi speed wiring (electromechanical only) - Odyssey ™ ™
24 volt signals from the thermostat (Y, W, and G etc.)
energize relays that command the VFD to the
appropriate speed.
SZVAV (ReliaTel ™ ™ Only) - Odyssey ™ ™
Field wiring m mu usstt be provided between the RTRM in
the outdoor unit and the RTOM in the air handler.
Figure 45. SZVAV wiring (electromechanical only)
RTRM J-4
RTOM J-1
Field Installed Wires
Communication wiring from the RTRM to the RTOM
m
mu usstt be shielded and grounded at the outdoor unit
o on nlly y.
The RTRM communicates information to the RTOM
regarding evaporator fan modulation. The RTOM then
sends a 0-10 volt dc signal from the J-11 plug to the
VFD to modulate the fan speed.
S Siin ng glle e Z Zo on ne e V VA AV V,, M Mu ullttii--S Sp pe ee ed d a an nd d 1 17 7 P Pllu uss