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Table 1.
Troubleshooting (continued)
SYMPTOM
Humidifier Inoperable
Field Service
Note: Do not attempt to make repairs without the proper
tools.
CW Leaks
A leak in a chilled water cooling system will usually form
an obvious puddle of fluid beneath the unit. To locate the
point of leakage, visually trace the leak up from the puddle
to the area on the unit where fluid is seen dripping.
CW Leak Repair
When a leak is detected, properly reclaim the remaining
CW coolant before attempting repairs. Adjacent piping
must be thoroughly cleaned by removing all paint, dirt and
oily film. Use a wire brush, sand cloth or sand paper and
wipe the area clean before attempting repair. Protect
nearby parts from heat damage by wrapping with water-
soaked cloths.
For copper-to-copper (piping) repairs use SILFOS Alloy.
No flux is required with Silfos Alloy. Silver solder (Stay Silv
#45) and flux should be used on copper-to-brass or copper-
to steel repairs.
When repairs are completed, remove all traces of flux.
After any repair, check for leaks prior to recharging the
system.
Humidifier Cylinder Replacement
After an extended period of operation, the yellow LED on
the humidifier cabinet will repeatedly flash four times
indicating that the cylinder is completely used and a
replacement cylinder must be installed. The cylinder is
disposable and cylinder life is dependent on water supply
conditions and humidifier usage. Use the following
procedure to replace the cylinder.
AH-SVX010C-EN
PROBABLE CAUSE
1.
Water supply has been turned off or not
connected.
2.
Humidifier switch is in "Off" position.
3.
Electrical connections are loose.
4.
Humidifier circuit breaker tripped.
5.
Defective contactor.
6.
Relative humidity is above setpoint.
7.
Electrode canister change cylinder light is
activated.
8.
Water conductivity is too low.
RECOMMENDATION
Connect and/or turn on water supply.
Turn switch to "Auto/On" position.
Tighten electrical connections.
Check for excess current draw by the humidifier
electrodes. Drain water from tank and refill. Reset
circuit breaker.
Repair or replace.
Adjust humidity setpoint.
1. Consult humidifier manual.
2. Water conductivity is too low and water is at the top
of the cylinder (see next item).
Add a teaspoon of table salt to the water through the
top of the cylinder. Typically only required during
initial start-up.
NOTICE
Humidifier Damage!
Failure to replace the cylinder at the end of cylinder life
may result in humidifier damage.
Note: Decrease the humidity set point below actual
conditioned space humidity to allow the cylinder to
cool down prior to removal.
1. Turn the unit off, preferably in a manner that uses the
controller, such as via BMS or the controller terminal.
2. Turn off the water supply to the humidifier using the
small manual ball valve (in the unit skid, under the
compartment where the humidifier is located) that tees
off the main water supply.
3. Enter the cabinet section that houses the humidifier
and drain the humidifier cylinder by toggling the ON/
OFF/ DRAIN switch on the humidifier to DRAIN.
4. Allow the cylinder to completely drain then turn the
humidifier off by toggling the ON/OFF/DRAIN switch
on the humidifier to OFF.
5. Exit the cabinet and turn off main power using the
through-door disconnect switch on the door of the Unit
Control Box.
6. Follow the steps of the cylinder removal, drain valve
cleaning and cylinder installation procedures in the
humidifier installation and operation manual, which
was provided under separate cover with the unit.
7. Close up the cabinet and turn main power on using the
through-door disconnect switch on the door of the Unit
Control Box.
8. Open the manual ball valve that was closed in
9. Turn the unit on and readjust the humidity set point.
If the humidifier is to be shut down for an extended period,
follow the steps of the Extended Shutdown procedure in
the Nortec MES2 Installation and Operation Manual.
Maintenance
Step
2.
21
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