Specifications

Page 28 • DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual
Start-up checklist
LW series controller
Tap/softened water
☐ Adjust humidistat setting to create a call for humidity.
☐ Open shut-off valve on water supply line, and confirm that
drain valve is closed. Tank should begin filling with water
through fill valve.
☐ Shortly before fill valve shuts off, rising water level causes water
to come in contact with the bottom probe, and heating element
contactor(s) will be actuated.
☐ Check heater cut-off circuit as follows:
1. Close manual water supply valve, then open drain valve and
start draining tank.
2. When water level drops below bottom probe, the heating
element contactor(s) drop out.
3. When Step 2 above has completed, close drain valve.
☐ Check function of field-installed safety controls, such as fan
proving switch. Contactor(s) should drop out when proving
switch is open.
☐ Check heater draw by testing and recording voltage and
amperage in each phase. Readings should match humidifier
name plate readings (name plate is on humidifier housing).
☐ Inspect installation for steam or air leaks while operating
humidifier. Seal any leaks.
DI/RO water option
☐ Adjust humidistat setting to create a call for humidity.
☐ Open shut-off valve on water supply line, and confirm that
drain valve is closed. Tank should begin filling with water
through fill valve.
☐ Shortly before fill valve shuts off, float-operated heater cut-off
switch will “make,” and heating element contactor(s) will be
actuated. A time delay relay circuit prevents contactor chatter
that would otherwise occur due to bouncing of heater cut-off
float.
☐ Check heater cut-off circuit as follows:
1. Close manual water supply valve, then open drain valve and
start draining tank.
2. When water level drops past switching level on heater cut-off
float, the heating element contactor(s) drop out.
3. When Step 2 above has completed, close drain valve.
☐ Check function of field-installed safety controls, such as fan
proving switch. Contactor(s) should drop out when proving
switch is open.
☐ Check heater draw by testing and recording voltage and
amperage in each phase. Readings should match humidifier
name plate readings (name plate is on humidifier housing).
☐ Inspect installation for steam or air leaks while operating
humidifier. Seal any leaks.
Operation