47
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Start-up checklist
Your humidifi cation system may not have all of the options listed below. If an
item does not apply to your system, skip to the next item.
☐
Verify that humidifi er, controls, piping, electrical connections, steam supply,
and dispersion units(s) are installed according to installation instructions in
this manual and:
• Ladder style wiring diagram and external connections wiring diagram
(inside humidifi er cabinet)
• Governing
codes
• Vapor-logic Installation and Operation Manual
– Installation
section
– Pre-installation
checklist
☐
Verify that fi eld wiring is done per instructions in this manual and per unit
wiring diagram.
☐
Confi rm that proper grounding and an approved earth ground are provided.
☐
Confi rm that instructions in the Electric shock hazard warning have been followed.
☐
Confi rm that water fi ll line was thoroughly fl ushed before it was connected to the humidifi er.
☐
Verify that humidifi er is mounted level and securely supported before fi lling with water. See
operating weights in Table 6-1.
☐
Make sure cylinder is fully seated into drain valve, and verify that all electrical connections are
secure.
☐
Turn water supply on (do not use demineralized, deionized, or reverse-osmosis water) and
confi rm that drain valve is closed.
If the force of air exiting water supply lines blows fi ll cup cap off during fi rst fi ll cycle, this is not
a sign of defect or a cause for concern; simply replace fi ll cup cap after all air has exited water
line.
☐
Verify that humidifi er is level and plumb when fi lled with water.
☐
Turn power on and confi rm that Model XTP keypad/display illuminates.
☐
Confi rm that airfl ow switch is closed.
☐
If you choose not to use airfl ow switch: Jumper AFsw and 24vac terminals
☐
If you choose not to use on-off duct high limit: Jumper 21vdc and DHL terminals
☐
Confi rm that high limit humidistat input is closed or that variable air volume (VAV) control system
high limit transmitter is connected.
☐
With suffi cient water in steam cylinder, airfl ow switch closed, high limit humidistat closed, door
safety interlock switch closed, and a call for humidity, verify that heat outputs are activated.
☐
If you experience diffi culties, see “Troubleshooting” on Page 52.
WARNING
Electric shock hazard
Contact with energized circuits can
cause property damage, severe
personal injury or death as a result of
electrical shock or fi re.
Make sure cabinet doors are installed
before turning on electrical power.
For proper operation of safety interlock
switch, install electrical-side door fi rst,
then install cylinder-side door.
OPERATION