Comfort-Aire HTS Series Split System,Two Stage, 2-5 Tons - Manual (Page 31)

31
Installation, Operation & Maintenance HTS SERIES SPLIT SYSTEM Heat Controller, LLC
Unit Start-Up Procedure
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERATURE ALGORITHM
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
ATC32U01
SELECT OPTION
PREVIOUS
SERVICE MODE
MANUAL OPERATION
CONTROL DIAGNOSTICS
DIPSWITCH CONFIG
FAULT HISTORY
CLEAR FAULT HISTORY
SELECT OPTION
PREVIOUS SELECT
MANUAL OPERATING MODE
Y1 COMM OUTPUT OFF
Y2 COMM OUTPUT OFF
W COMM OUTPUT OFF
O COMM OUTPUT OFF
G COMM OUTPUT OFF
H COMM OUTPUT OFF
DH COMM OUTPUT OFF
ECM AIRFLOW 0
PUMP SPEED 0%
TEST MODE OFF
SELECT OPTION
PREVIOUS SELECT
b. Check for cool air delivery at the unit grille within a few
minutes after the unit has begun to operate.
NOTE: Units have a fi ve minute time delay in the control
circuit that can be bypassed on the DXM2 control board by
placing the unit in the “Test” mode as shown in the unit IOM.
Check for normal air temperature drop of 15°F to 25°F (cooling
mode).
c. Verify that the compressor is on and that the water
temperature rise (cooling mode) is within normal range.
9 - 12
18 - 24
4 - 9
7 - 19
d. Check the elevation and cleanliness of the condensate
lines. Dripping may be a sign of a blocked line. Check
that the condensate trap is fi lled to provide a water
seal.
e. Turn thermostat to “OFF” position. A hissing noise
indicates proper functioning of the reversing valve.
7. Allow fi ve (5) minutes between tests for pressure to
equalize before beginning heating test.
a. Go into Manual Mode activate Y1, and Y2 for Heating.
Also manually increase CFM until desired heating
CFM is achieved. Next adjust pump speed % until
desired loop temperature difference (entering water
temperature minus leaving water temperature) is
achieved. (For modulating valve adjust valve %).
b. Check for warm air delivery at the unit grille within a
few minutes after the unit has begun to operate.
NOTE: Units have a fi ve minute time delay in the control
circuit that can be bypassed on the DXM2 control board by
placing the unit in the “Test” mode as shown in the unit IOM.
Check for normal air temperature rise of 20°F to 30°F (heating
mode).
c. Verify that the compressor is on and that the water
temperature fall (heating mode) is within normal range.
d. Check for vibration, noise, and water leaks.
8. If unit fails to operate properly, perform troubleshooting
analysis (see troubleshooting section in the unit IOM).
If the check described fails to reveal the problem and
the unit still does not operate, contact a trained service
technician to insure proper diagnosis and repair of the
equipment.
9. When testing is complete, exit the Installer Menu and set
thermostat to maintain desired comfort level for normal
operation.
10. BE CERTAIN TO FILL OUT AND RETURN ALL
WARRANTY REGISTRATION PAPERWORK.
Unit performance may be verifi ed by calculating the unit heat
of rejection and heat of extraction. Heat of Rejection (HR)
can be calculated and compared to the performance data
pages in this IOM. The formula for HR is as follows: HR = TD
x GPM x 500 (or 485 for anti-freeze solutions), where TD is
the temperature difference between the entering and leaving
water, and GPM is the fl ow rate in U.S. GPM determined by
comparing the unit heat exchanger pressure drop to Table 12.
Heat of Extraction (HE) can also be calculated and compared
to the performance data pages in this IOM. The formula for
HE is as follows: HE = TD x GPM x 500 (or 485 for anti-freeze