Ingersoll-Rand ReliaTel, Manual, Page: 163 / 176

RT-SVD03L-EN 163
The travel time is dependent on the temperature of
the air flowing across the sensor. If the mixed air
sensor temperature falls below the 53° F
economizer setpoint the damper will stop opening
and begin to close back to minimum position.
13. If incoming air conditions are warmer than the
setpoint and the damper is not opening, check the
damper relay connection in the mixed air sensor
circuit and verify the proper sensor and sensor
wiring. Also measure the 100K resistor and verify
correctness and that it is connected to the proper
input.
14. To check out compressor operation from the Novar
ETM connect a short across the jumper tabs on the
cool 1 output relay. Verify that the 1st stage of
compressors activates within 3 minutes. Each stage
of compressors will be forced off for a minimum of
3 minutes at power up and after a period of
operation.
Be aware that the compressor will remain on for a
minimum of 3 minutes even if the short is removed.
To immediately discontinue compressor operation
disconnect unit power. Verify that the unit is
producing cool, conditioned air.
Keep in mind that the outdoor air damper will close
to minimum position when the discharge air cools
below the economizer setpoint.
15. If compressors do not activate within 3 minutes of
placing the short verify the cool 1 relay output is
properly connected to the thermostat-Y1 input on
the RTRM and that compressor circuit 1 is properly
connected according to the ReliaTel™ installation
guide. Verify the compressor(s) has properly
connected line power and that all in-line safety
limits and contactors are functioning correctly.
16. Follow the same procedure as above to check
proper operation of the 2nd stage of compressors
by placing a short across the cool 2 output relay.
Keep in mind that the cool 1 and cool 2 thermostat
controls operate independently of each other and
must adhere to a 3-minute delay between stage
additions.
If problems are encountered complete the checks
above except verify proper connection between the
cool 2 output relay and the RTRM thermostat-Y2
input.
17. After verifying proper operation of both
refrigeration circuits remove all shorts.
Compressors should deactivate immediately if they
have been running for at least 3 minutes. The
supply fan will remain on for 60 seconds, and the
outdoor damper will close after the supply fan
shuts off.
18. For heating checks (if installed) place a short across
the jumper tabs on the heat 1 output relay. If the
unit is a gas heat unit the gas modules will begin
the approximately 45 seconds cycle initiation. The
supply fan will remain off until the gas heat has
successfully initiated and operated for
approximately 60 seconds.
If the unit is an electric heat unit the 1st stage of
electric heat will be energized and the supply fan
will come on immediately. The unit should be
discharging warm air.
19. If heat does not activate after placing the short,
verify proper connection of the heat 1 output relay
to the RTRM thermostat-W1 input. Verify proper
ReliaTel™ module heater connections and function
using the ReliaTel™ installation guide.
20. To activate the second stage of heat (if applicable)
place a short across the jumper tabs on the heat 2
output relay. A similar process as described with
the 1st stage of heat will take place. Verify, if
possible, the 2nd stage of heat activates.
If the 2nd stage of heat does not activate, verify
proper connection of the heat 2 output relay to the
RTRM thermostat-W2 and verify proper ReliaTel™
heat module output connections. Also verify line
power connections to the heating units.
21. If heat operation is correct, disconnect all shorts
from the jumper tabs on the relays. All heat will
deactivate within a few seconds. Supply fan will
deactivate when electric heat deactivates or 90
seconds after gas heat deactivates.
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