Ingersoll-Rand ReliaTel, Manual, Page: 55 / 176

RT-SVD03L-EN 55
Figure 48. Setup of economizer minimum position
COMMUNICATIONS FAILURE
MAT SENSOR FAULT
OAT SENSOR FAULT
OAH SENSOR FAULT
RAT SENSOR FAULT
RAH SENSOR FAULT
CO2 SENSOR FAULT
ACTUATOR FAULT
NORMAL - NOT OK TO ECONOMIZE
NORMAL - OK TO ECONOMIZE
NO POWER
BLINK
8
7
6
4
3
2
1
STEADY FLASH
STEADY ON
OFF
LED FLASH CODES
24
VAC
24
VAC
XFMR 1
MBUS
2 - 10 VDC
DAMPER
COMMAND
2
-
10
VDC
DAMPER
FEEDBACK
2000
1500
UL
500
500
1900
LL
300
Pre-RTRM V. 8
DCV
SETPOINT
RTRM V.
8
or Newer
E
D
C
B
A
ENTHALPY
SETPOINT
DESIGN
DCV
MIN
POS
DCV
MODE
P
1
P
DCV
RAH
RAT
OAT
OAH
MAT
ExF
Damper minimum position adjustments should be
done in the test mode.
• Test step 1 (supply fan) forces the supply fan to run
at LOW speed. The minimum position of the
economizer damper is allowed to travel between
0% and 100% when the fan is at LOW speed. This is
adjusted by the DCV Min potentiometer on the
RTEM.
• Test step 3 (compressor stage 1) forces the supply
fan to run at MEDIUM speed. The minimum
position of the economizer damper is allowed to
travel between 0% and 75% when the fan is at
Medium speed. This is adjusted by the LL
potentiometer on the RTEM.
• Test step 4 (compressor stage 2) forces the supply
fan to run at HIGH speed. The minimum position of
the economizer damper is allowed to travel
between 0% and 50% when the fan is at HIGH
speed. This is adjusted by the DESIGN Min
potentiometer on the RTEM.
BAS setpoints override any local potentiometer
adjustments.
An economizer on a light commercial multi-speed
supply fan or the single zone VAV option must have the
fully populated "enhanced" RTEM of at least version 2.0
or greater.
The powered exhaust set point should be set in the
HIGH fan speed (test step 4, compressor stage 2).
ReliaTel™ will determine an adjusted setpoint for other
fan speeds based on this setting.
It is not recommend using a motorized damper with
multi-speed or single zone VAV units.
Condensate Drain Pan Overflow
Switch
A condensate overflow condition will be detected by a
condensate overflow float switch. When the
condensate level reaches the trip point, the diagnostic
condition will be detected. When the condensate
overflow input CLOSES for 6 continuous seconds, the
following actions will be taken by the ReliaTel™
controls:
• An auto-reset diagnostic will be generated. All
compressor or heating operations will be disabled
immediately. Condenser fans and compressors will
be de-energized. Supply fan operation will be
shutdown.
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