Greenheck TSU Base Unit Manual (464441) - Manual (Page 30)

Make-Up Air Unit 30
®
Troubleshooting
Water Wizard™ — Improper Water Supply
1. Adjust the Manual Supply Valve
Adjust the manual supply valve (refer to Start-Up, Water
Wizard™). If the recommended water pressure does not
provide enough water, increase the pressure until the
desired water supply is achieved. If the recommended
water pressure provides too much water, decrease
the water pressure until the desired water supply is
achieved.
2. Enter Program Mode
Press and hold the
Enter key for three
seconds to enter Program
Mode. The display will read
“Pro” when Program Mode is
active.
3. Adjust the On Time Factor
While in the Program Menu, use the Up and
Down keys to navigate through the menu
options until “ont” is displayed.
With “ont” displayed,
press the Enter key to
access the setting.
With the setting displayed,
use the Up and Down keys to
adjust the setting as needed.
Increase the factor to increase the water supply or
decrease the factor to decrease the water supply.
The Enter key must be pressed to save the new On
Time Factor and to return to the Program Menu.
NOTE
If the water supply is too low, the media will
continuously appear dry.
NOTE
If the water supply is too high, the media will be
saturated and excessive water will be draining from
the sump tank.
NOTE
Some water drainage is desired to keep the media
flushed, but it should be minimized to utilize the Water
Wizard.
CAUTION
Only proceed to Steps 2 and 3 if Step 1 does not
correct the problem.
Program Display
On Time Factor Display
NOTE
Changing the On Time Factor by (1) will change the
water supply by approximately 3%.
4. Exit Program Mode
After 15 seconds of idle time the controller will
automatically exit Program Mode.
Maintenance - Routine
CAUTION
Lock-out the gas and the electrical power to the
unit before performing any maintenance or service
operations to this unit.
V-Belt Drives
V-belt drives must be checked on a regular basis for
wear, tension, alignment, and dirt accumulation.
Check the tension by measuring the deflection in the
belt as shown.
Check the alignment by using a straight edge across
both sheaves as shown.
Belt Tension
Belt Span
Deflection =
Belt Span
64
IMPORTANT
Premature or frequent belt failures can be caused by
improper belt tension, or misaligned sheaves.
• Abnormally high belt tension or drive misalignment
will cause excessive bearing loads and may result
in failure of the fan and/or motor bearings.
• Abnormally low belt tension will cause squealing
on start-up, excessive belt flutter, slippage, and
overheated sheaves.
IMPORTANT
Do not pry belts on or off the sheave. Loosen belt
tension until belts can be removed by simply lifting the
belts off the sheaves.
IMPORTANT
When replacing V-belts on multiple groove drives,
all belts should be changed to provide uniform drive
loading.
IMPORTANT
Do not install new belts on worn sheaves. If the
sheaves have grooves worn in them, they must be
replaced before new belts are installed.
Drive Alignment