Ingersoll-Rand ReliaTel, Manual, Page: 49 / 176

RT-SVD03L-EN 49
• YHC067E4RHA03D0A1000000000 - the 15th digit (0)
indicates this model is a multi-speed evaporator fan
unit.
• YHC067E3RHA03D6B0C1B0B000 - the 15th digit (6)
indicates this is a SZVAV unit.
Wiring and Configuration
Precedent ™ , 17 Plus, 3 to 5 tons (037, 047, and 067)
units use a constant CFM ECM direct drive evaporator
fan motor. Airflow is controlled by a pulse width
modulated (PWM) output signal from the J11 header of
the RTOM. It is important to note that the J-11 output
controls the cfm but does not directly control fan
speed. The ECM motor will determine actual rpm
based on static pressure conditions and current draw
of the motor to maintain the set cfm.
Figure 31. 17 Plus 3-5 Tons airflow control
configuration
Multi-speed operation is standard on all 17 Plus units.
Single zone VAV is available on 17 Plus units as a
factory installed option.
Proper wiring configuration is required for correct unit
operation. Wiring harness plugs should be configured
as shown below for Precedent
™ 17 Plus units.
Figure 32. 17 Plus SZVAV configuration
Figure 33. 17 Plus standard (multi-speed)
configuration
Adjusting Maximum Unit Airflow
Make adjustments to the maximum airflow of a 17 Plus
unit while in either Cooling stage 2 or any stage of heat
while in the factory test mode. This will force the
indoor fan to maximum speed and ready for
adjustment.
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