Maintenance Instructions for WS-3300
Danger – To Avoid Hazard of Electrical Shock or Burn, Turn Off
Power Supply to Your WS-3300 Before Servicing.
The cleaner your WS-3300, the more efficiently it humidifies.
1. Shut off power and water supply.
2. Remove front cover
3. Lift front of distribution tray and remove evaporation
pad. Pad should be changed every 10-20 weeks depend-
ing on water condition. (To reassemble, install distribution
tray first, then while lifting the front of the distribution tray
install bottom of evaporator pad, then push the pad back
into position. Lower distribution tray on top of the evapo-
rator pad.
4. All parts (except electrical components and pad) of the
WS-3300 can be washed in a 50% solution of water and
vinegar. However, it is recommended that you purchase
and replace the pan liner and evaporator pad every 10 to
20 weeks.
5. Wipe any loose sediment from the cabinet with your
50% solution. Make sure the drain hole and hoses are
free of sediment and particles.
Annual Summer Shutdown
When its time to turn off your WS-3300 for the summer,
turn your humidistat to the off setting. It is recommended
that you also complete the above 5 easy maintenance
steps at this time.
Warning!
1. 120 volts may cause serious injury from electrical shock.
Disconnect electrical power to the furnace before starting instal-
lation.
2. Sharp edges may cause serious injury from cuts. Use care
when making plenum openings and handling duct work.
3. Hot water temperatures in excess of 125 degrees F. may cause
serious injury from burns. Make sure water supply is shut off
before connecting the water supply.
Caution!
1. Do not install unit where freezing temperature could occur.
2. Do not install unit on the furnace jacket.
3. Do not install unit on a plenum face where the blanked off ends
of the cooling coil restrict air movement through the humidifier.
4. Do. Not set humidity higher than recommended. Condensation
dame may result.
5. Do not connect the WS-3300 power cord to multi-speed
furnace blower motors other than 120 VAC.
6. Do not set humidity up to recommended levels if there is
condensation on the inside windows of any unheated living
space. Condensation damage may result.
7. Do not install unit on the supply plenum where static pressure
exceeds 0.4” W.C.
8. Do not install the unit where water pressure exceeds 65 psi.
Leakage may result. Follow codes in effect concerning pressure
reduction.
12. Check operation. Open saddle valve and turn on
furnace. Turn up the humidistat to engage the WS-
3300. Allow the unit to operate until water is observed
running from the drain hose. Check for any water leaks.
If all functions are operating properly, reset humidistat
to recommended level. Place owner’s manual near
humidistat for owner.
Page Two Lobb WS-3300 Installation Instructions
NOTE:
CHANGE EVAPORATOR PAD AT THE
BEGINNING OF EACH SEASON. SHUT OFF
WATER AND AIR FLOW AT THE END OF
HEATING SEASON.
