Mammoth V-Cube Slim E-Series (Standard Versions) - Manual (Page 10)

10
MAMM-VCS-IOM-1EB (October 2011)
1. Open all valves to the full open position and turn on
power to the V-Cube Slim™.
2. Set room temperature sensor for “Fan Only” opera-
tion by selecting “Off” at the system switch and
“On” at the fan switch. If “Auto” fan operation is se-
lected, the fan will cycle with the compressor.
Check for proper air delivery.
3. A 5 minute anti-short cycle delay is inherent to the
unit’s microprocessor board. After the 5 minute
delay, check the discharge air temperature using
the unit keypad.
4. Measure the temperature difference between en-
tering and leaving water. The difference in water
temperature should be approximately 1 ½ times
greater in the cooling mode as compared to the
heating mode . Adjust the combination shutoff/
balancing valve in the return line to a water flow
rate which will result in the temperature difference.
5. In the heating mode, with the entering water tem-
perature in the range of 60°F to 80°F, the tempera-
ture difference between the entering water and
leaving water should be between 6°F to 12°F. In
the cooling mode, if the leaving air temperature
falls below 35°F, adjust water flow to the unit to >3
gpm/ton to avoid freeze damage to the unit.
Start-up
6. To verify proper drainage of condensate, slowly
add water to the condensate pan until proper drain-
age is accomplished.
7. If the unit fails to operate, check the following:
8. If the unit starts but after a short time trips on high
or low head pressure, check the following:
a. Verify that the incoming power to the unit
matches the nameplate and that the main dis-
connect is turned on.
b. Verify a call for heating or cooling is present.
a. Verify that airflow is not impeded by a dirty air
filter, improper fan rotation or improper duct
sizing.
b. Verify that the water flow rate is within limits.
Check the water flow balance and back flush if
necessary.