Unit Startup
RT-SVX24J-EN
113
Service Testing—Evaporative Condenser
Components
From the Compressor and Condenser Service Menu
screens—Head Pressure Control: AUTO or Head Pressure
Control: MANUAL
1.
Select:
Head Pressure Control: MANUAL
Note:
All outputs, Sump Control, Fan Stage Control and
Fan speed Control (per circuit where specified), will
be available for ON/OFF, OPEN/CLOSED, 0-100%
manual settings considering the stipulations in
Table 39
:
Notes:
1. Sump Freeze Protection is active during AUTO but is inactive in service
test modes (Head Pressure Control set to MANUAL).
2. Water Treatment Drain Request will be ignored in Service Test.
Verifying Proper Fan Rotation
Note:
Fans controlled by VFD will run in the correct
direction even if phasing is incorrect.
1.
Ensure that the “System” selection switch at the
remote panel is in the “Off” position and the “Fan”
selection switch for constant volume units is in the
“Auto” position. (VAV and SZVAV units do not utilize a
“Fan” selection input.)
2. Close the disconnect switch or circuit protector switch
that provides the supply power to the unit terminal
block 1TB1 or the unit mounted disconnect switch
1S14.
3. Turn the 115 volt control circuit switch 1S2 and the 24
volt control circuit switch 1S3 to the “On” position.
4. Open the Human Interface access door, located in the
unit control panel, and press the SERVICE MODE key to
display the first service screen. Refer to the latest
edition of the appropriate programming manual for
applications for the SERVICE TEST screens and
programming instructions.
5. Use
Table 37, p. 110
to program the unit Fans for
operation by scrolling through the displays. All of the
Fans (Supply, Exhaust, and Condenser fans) can be
programmed to be “On”, if desired.
Refer to
Figure 69, p. 114
for the condenser fan
locations and the Human Interface designator.
6. Once the configuration for the Fans is complete, press
the NEXT key until the LCD displays the “Start test in
__Sec.” screen. Press the + key to designate the delay
before the test is to start.
This service test will begin
after theTEST START key is pressed
and the delay
designated in this step has elapsed. Press the ENTER
key to confirm this choice.
7.
Press theTEST START key to start the test. Remember
that the delay designated in step 6 must elapse before
the fans will begin to operate.
8. Check the supply fan and the exhaust fans (if equipped)
for proper rotation. The direction of rotation is
indicated by an arrow on the fan housings. Check the
condenser fans for clockwise rotation when viewed
from the top.
Table 39. Service test guide component operation—
evaporative condenser
COMPONENT
BEING TESTED
Requirements (ON)
Requirements
(OFF)
Compressors
Sump minimum level
switch must be closed for
a minimum of five minutes
No Requirements
Sump Pump
Sump minimum level
switch must be closed for
a minimum of five minutes
No Requirements
Condenser Fans
No Requirements
No Requirements
Fill Valve Solenoid
No Requirements
No Requirements
Drain Valve Actuator
No Requirements
No Requirements
Sump Heater
No Requirements
No Requirements
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury.
