Maintenance - Gardner Denver RNC100 Instruction Manual

3.0 MAINTENANCE

3.1 Condenser coil
A. Air-cooled - clean off accumulated dust and dirt monthly
or as necessary in dirty environments.
B. Water-cooled - clean strainer monthly, more often if
required. Shut off water, remove small plug to relieve
pressure, then remove large plug to remove strainer.
Clean strainer and replace.
3.2 Moisture Separator/Oil Removal Filter
NOTE: Prepackaged maintenance kits are available
that include all necessary filter and timed drain valve
components. Maintain maximum performance and
efficiency with Genuine Parts. See page 26 for ordering
information.
When to replace the Separator/Filters
Replace filter element when pressure drop across dryer is
excessive or annually.
Dryers have the option of one or two stages of filtration.
The directions for servicing either filter is identical.
When removing liquids at rated flow conditions, an
increase in pressure drop will occur as the separator/
filter elements become loaded with solid particles.
Procedure for Separator / Filter Element Replacement
THIS FILTER IS A PRESSURE CONTAINING DEVICE.
DEPRESSURIZE BEFORE SERVICING. If filter has not been
depressurized before disassembly, an audible alarm will sound
when the bowl begins to be removed from the head. If this
occurs, stop disassembly, isolate and completely depressurize
filter before proceeding.
1. Isolate dryer (close inlet and outlet valves if installed) or
shut off air supply.
2. Depressurize filter by slowly opening manual drain by-
pass valve.
3. Remove bowl
a. For models RNC100 through RNC150 - bayonet
mount - push bowl up, turn bowl 1/8th turn to your
left, and pull bowl straight down
b. For models RNC200 through RNC750 - threaded
bowls - unscrew bowl from head using hand, strap
wrench or C spanner.
4. Clean filter bowl
5. Replace moisture separator element.
a. Replacing complete Grade B element.
1) Pull off old element and discard
2) Make certain o-rings on male of replacement
element adaptor are in place and push element
into filter head.
NOTE: Do not handle Oil Removal Filter elements by outside
foam cover. Handle by bottom end cap only.
6. After making certain that o-ring inside top of bowl (and
on bayonet mount heads, wave spring) are in place,
reassemble bowl to head.
10
NOTE: Make certain o-ring is generously lubricated. (Use
lubricant provided)
NOTE: Wave spring ends should be pointed down to prevent
the wave spring from interfering with reassembly.
NOTE: Threaded bowl to head connection, generously
lubricate threads with a high grade/temperate lubricant 150
°F, 66°C. (Use lubricant provided).
7. Disassemble condensate drain valve(s).
8. Rebuild drain valves using Genuine Parts. See page 26
for ordering information.
Model RNC100
Bowl
O-Ring
Models RNC125 thru RNC150
Bowl
O-ring
Timer Drain Valve - Standard
Separator Element
or Optional Oil Removal
Element
Wave Spring
Pneumatic Pilot
Operated Drain
Tube
Timer Drain Valve
(ONLY with I-Controller Level 2)
Separator Element
or Optional Oil Removal
Element
Wave
Spring