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Residential Split - 60Hz R410A
Rev.: 03 August, 2012
www.heatcontroller.com
31
Unit Start-Up Procedure
WARNING!
CAUTION!
WARNING! When the disconnect switch is closed, high
voltage is present in some areas of the electrical panel.
Exercise caution when working with energized equipment.
CAUTION! Verify that ALL water valves are open and
allow water fl ow prior to engaging the compressor.
Freezing of the coax or water lines can permanently
damage the heat pump.
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
20 - 26
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
4 - 8
10 - 17
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
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.
If performance during any mode appears abnormal, refer to the
DXM2 section or troubleshooting section of this manual.
NOTE: To obtain maximum performance, the air coil should
be cleaned before start-up. A 10% solution of dishwasher
detergent and water is recommended.