Specifications

40 YORK INTERNATIONAL
NOTE: If digits other than the correct digits were
entered in step No. 4,
day
INVALID ACCESS CODE
is displayed when the “ENTER” key is
pressed. If this occurs, enter the correct
access code and proceed.
f. This is displayed:
DAY ACCESS TO PROGRAM KEY AUTHORIZED
NOTE: Unless terminated by pressing the “AC-
CESS CODE” key again, the operator
will have access to the “PROGRAM”
mode key for 10 minutes. When 10 min-
utes have elapsed, access to the “PRO-
GRAM” mode key will be automatically
disabled and the operator must return to
step No. 1 to gain access.
g. Press the “PROGRAM” mode key.
h. This is displayed:
day
PROGRAM MODE, SELECT SETPOINT
2. Select the Turboguard boost pump, as follows:
a. Press the “AUTO” prerotation vanes service key.
b. Press the “ADVANCE DAY/SCROLL” entry key
repeatedly (if needed) until the following message
is displayed:
day
TURBOGUARD BOOST PUMP SELECTED
c. Press the “ENTER” key and the display will read:
day
PROGRAM MODE; SELECT SETPOINT
FIG. 23 - PUMP ASSISTED TURBOGUARD PURGE UNIT COMPONENTS
d. Press the “AUTO” prerotation vanes service key
to verify that the following message is displayed:
da
TURBOGUARD BOOST PUMP SELECTED
e. Press the “ACCESS CODE” mode key to exit
“PROGRAM” mode.
3. All field piping connections should be leak checked.
4. The purge pump motor will be energized when the
chiller compressor is started; the purge pump motor
fan should be in motion. If the pump motor fails to start,
try resetting the high pressure cutout switch by de-
pressing and releasing the manual reset button. The
purge will go through a fill/drain cycle every 8 to 12
minutes depending on the amount of air present in
the system. An air exhaust is made if enough
noncondensible is present to bring purge condenser
pressure to 90 PSIA. Purge cycling can be monitored
on the control panel by using the “DISPLAY DATA”
sevice key to purge tank pressure.
Excess Purge Threshold
The excess purge threshold can be programmed by the
service person or customer operator personnel. When this
threshold is met, an excess purge message is displayed
alternately with the normal foreground message. The ser-
vice person, using the special service access code, can
program the threshold for 1-30 purges per hour. The cus-
tomer operator personnel, using access code 9 6 7 5, can
program the threshold for 10-30 purges per hour. The
default value is 20. To enter the excess purge threshold:
1. Press the “ACCESS CODE” mode key.
2. The following message is displayed:
ENTER VALID ACCESS CODE
CHECK VALVE
FLOAT SWITCH ASS’Y
PUMP
PURGE TANK
FILTER DRIER
2626874A(D)
2627046A(D)