Field Service Guide - Ingersoll-Rand DXR Series Operator's Instruction Manual

CAUTION
Do not use a pipe wrench to tighten the filter
bowl to the head.
9. Reattach bowl to head and hand tighten. As the
bowl is threaded onto the head, supports in the bot-
tom of the bowl ensure a proper seal between the
element and the filter head.
10. Reattach drain lines (if applicable).
11. Record the date of the element change in a record
book or on the provided
"Maintenance Reminder"
label. The maintenance
reminder label with the
updated information
should be applied over
the previous label each
time the element is replaced.
Restart the dryer according to the Start-up instructions
on page 8.

FIELD SERVICE GUIDE

Problems most frequently encountered with refrigerated
dryers are water downstream of the dryer and excessive
pressure drop. Most causes can be identified and reme-
died by following this guide.
DANGER
Closed refrigeration systems are potentially
dangerous. Work on the refrigeration system
mu st be d o ne o nl y by a competent
refrigeration mechanic.
Do not release fluorocarbon refrigerants
indoors; do not discharge liquid refrigerants
into floor drains. Refrigerant vapors may
accumulate in low places. Inhalation of high
concentrations may be fatal. All refrigerants
must be recovered per EPA requirements.
Do no t smo k e w hile working o n the
refrigeration system or when a refrigerant leak
is s u sp ec ted. Burning mate rials may
decompose refrigerants, forming toxic gas or
acids that may cause serious injury and
property damage.
The refrigerant valves are adjusted at the factory with
the refrigerant system operating and no airflow through
1-12
MAINTENANCE REMINDER
Date Element Changed:
Changed By:
Next Scheduled Change:
Additional elements available from your local
Ingersoll-Rand Compressed Air System supplier
Telephone:
Fax:
the dryer. While the dryer is operating, the suction pres-
sure/temperature may fluctuate slowly with changes in
the refrigeration load. To determine the suction pres-
sure/temperature, a refrigeration mechanic should attach
a set of gauges to the unit. Gauge readings should be as
follows:
SUCTION PRESSURE/TEMPERATURE
WITHOUT
REFRIGERANT
AIRFLOW
R-22 58 psig/33°F
Do not adjust refrigerant valves without factory authori-
zation. Adjustments must be made only with no airflow
into the dryer.
REFRIGERANT PRESSURE SWITCH SETTINGS
Fan Cycle Control
Pressure Switch Setting
Model
DXR425
DXR600
DXR800
DXR1000
Refrigerant Compressor Control
Pressure Switch Setting
Sensor Location
Compressor
Discharge
Compressor
Suction
Table 6
WITH
AIRFLOW
68 psig/40°F
Table 7
R-22
On Off
275 195
Cut out Cut In
405 280
40 60
DXR Series Dryers (Bulletin 553)