Daily; Weekly; Monthly; Yearly - Ingersoll Rand HRD Serie Manuel De Instrucciones

CAUTION
Contact your local distributor before doing any
work on the solid state controls. Attempting to
service circuit boards or components may
result in equipment damage and will void the
warranty.

Daily

1. For models HRD600 through HRD3250, check
the filter above the dryer inlet.
2. Check automatic drain valve on prefilter (if
equipped) for discharge. If no condensate dis-
charges from drain valve, follow Shutdown proce-
dure (page 1-10), then dismantle and clean, repair
or replace drain valve as required.
3. Check system monitoring lights (for units with
Compu-Purge) on bottom half of indicating light
panel. If any light is lit, see explanations in
Indicators section, page 1-2, for diagnosis and
Field Service Guide, page 1-18, for remedy.
Check the following options as applicable:
4. Check the color of the moisture indicator in the
dryer outlet. When the dryer is functioning nor-
mally, the indicator is green. If the indicator is
yellow, refer to the Field Service Guide, page
1-18, for remedy.
5. Check the switch-failure alarm light on the control
panel. If the light is on, refer to the Field Service
Guide for remedy.
6. Check the high-humidity alarm light on the con-
trol panel. If the light is on, refer to the Field
Service Guide for remedy.

Weekly

1. Check prefilter and afterfilter differential pressure
indicators. Replace filter elements in accordance
with manufacturer's directions.
2. Check exhaust muffler for discharge of air from
regenerating vessel. If no air discharges, disman-
tle and clean or replace muffler core. If no air dis-
charges when muffler is removed, call your local
distributor.
3. Check purge valves for leakage. Rebuild if any
leakage is evident.

Monthly

Inspect the internal float drain valve (if equipped)
every two to three weeks for excessive oil and water
by pressing the test valve on the bottom of the filter
HRD Series (Bulletin 348)
unit. If more than one or two drops of oil leak out, the
drain valve should be cleaned or replaced as required.

Yearly

Maintenance kits for yearly preventive
maintenance are available from your local
d i s t ri b u t o r . S e e A p p e n d i x A f o r t h e
maintenance kit part numbers.
1. Inspect desiccant in dryer vessels. Depressurize
dryer according to Shutdown section of this man-
ual. Check for the following and correct as indi-
cated:
• Oil Contamination
If desiccant is contaminated with oil, check
drain valve on prefilter. Clean, repair or replace
drain valve as necessary. Replace prefilter ele-
ment, then replace desiccant.
• Broken Desiccant (excessive dusting)
Desiccant dusting may be caused by air flow
surges, excessive air flow or pulsating air pres-
sure. Check and correct these conditions, then
replace desiccant.
2. Check and calibrate dew point monitor (if
equipped) according to the manufacturer's in-
structions.
3. Replace all solenoid and butterfly valve dia-
phragms and seats.
4. Replace all prefilter and afterfilter elements.

Returns to Manufacturer

If the dryer or a component of the dryer must be re-
turned to the manufacturer, first call your local dis-
tributor for a return authorization number and a
shipping address. Your distributor will inform you
whether the dryer or only the component must be re-
turned.

Desiccant Replacement

Standard –40°F pressure dew point HRD Series heat-
less dryers use activated alumina desiccant. HRD Se-
ries heatless dryers designed to achieve a –100°F dew
point require both activated alumina and molecular
sieve. To ensure consistent dryer performance and to
prevent excessive dusting or premature desiccant
breakdown, use only factory-approved grades of acti-
vated alumina and molecular sieve when replacing
desiccant.
To replace desiccant:
Note
1-11