18 88-A5HP5001-1B-EN
STEP 3 - Check the liquid line temperature and liquid gauge pressure to obtain a minimum of 10º subcooling in
heating mode.
Measured Liquid Line Temp = __________ º F
Liquid Gauge Pressure = __________ PSIG
STEP 4 - Add charge if a minimum of 10º subcooling is not obtained with the nameplate charge plus additional
charge previously added.
STEP 5 - Complete the ‘Total System Charge’ charge rating label below and label located on the outside of the
unit with a permanent marker.
Note: Complete the ‘Total System Charge’ chart when nal charging is complete.
a. Charge added at Factory = ___________ lb/oz
b. Charge added at install = ___________ lb/oz
c. Total System Charge (a + b) = ___________ lb/oz
STEP 6 - Return to site for adjustment.
Important: Return in the spring or summer to accurately charge the system in the cooling mode with outdoor
ambient above 55º F.
1. Leak check refrigerant lines. ....................................... [ ]
2. Properly insulate suction lines and ttings. .................. [ ]
3. Properly secure and isolate all refrigerant lines. .......... [ ]
4. Seal passages through masonry.
If mortar is used, prevent mortar from coming
into direct contact with copper tubing. .......................... [ ]
5. Verify that all electrical connections are tight. .............. [ ]
6. Observe outdoor fan during on cycle for clearance
and smooth operation................................................... [ ]
7. Be sure that indoor coil drain line drains freely. Pour water
Section 15. Checkout Procedures and Troubleshooting
15.1 Operational And Checkout Procedures
CHECKOUT PROCEDURE
After installation has been completed, it is recommended that the entire system be checked against the following list:
Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units
must be operated and charge adjustments made.
Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust
tubing if necessary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections
are tight and properly secured.
into drain pan................................................................ [ ]
8. Be sure that supply registers and return grilles are open
and unobstructed.......................................................... [ ]
9. Be sure that a return air lter is installed. ..................... [ ]
10. Be sure that the correct airow setting is used.
(Indoor blower motor) ................................................... [ ]
11. Operate complete system in each mode to
ensure safe operation................................................... [ ]
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