START-UP
Complete the following checks and the Start-Up checklist on
page CL-1 before system start-up. Refer to outdoor unit in-
stallation, start-up and service instructions for system start-up
procedures and refrigerant charging methods.
1. Check condensate drainage system. Add water to check
the drainage flow. If water does not flow regularly, check
the pipe slope or see if there are any pipe restrictions.
2. Make sure that all wiring connections are correct and
tight.
3. Make sure that all barriers, covers, and panels are in
place.
4. Ensure that the filters have been installed and that
the discharge louvers are correctly positioned.
WARNING:
Never operate unit without a filter. Dam-
age to the unit or personal injury may result.
5. If the unit is equipped with a crankcase heater, ener-
gize a minimum of 24 hours before starting the unit.
To energize crankcase heater only, close indoor unit dis-
connect, then with the remote controller, set unit in off
mode and close the outdoor unit disconnect.
6. Fully backseat (open) the liquid and vapor tube ser-
vice valves.
7. Unit is shipped with valve stems frontseated and caps
factory installed. Replace stem caps after system is
opened to refrigerant flow (backseated). Replace caps
finger tight.
8. With the remote controller, turn on the unit and oper-
ate in each mode (as applicable) for 15 minutes to test
for proper operation. Do not operate in cooling mode if
outdoor temperature is below 55 F (538A, 538B) or
0° F (538S) unless unit is equipped with low ambient
control. Do not operate in heating mode (heat pump
systems only) if the outdoor temperature is above
75 F.
9. Test for proper refrigerant charge using the superheat
method (538A, 538B) or subcooling method (538S).
10. Explain basic system operation to the owner.
I. 619E CONTROL SYSTEM
The 619E unit is equipped with a microprocessor control which
operates the system. This control is located in the control box
of the fan coil unit, with thermistors located in the fan coil
inlet and on the indoor coil. The 619E heat pump fan coil units
also have thermistors located on the outdoor coil and in the
outdoor air inlet. These thermistors monitor system opera-
tion and control the operating mode. To change settings or
modes of operation, use the factory-supplied infrared wire-
less remote controller. This controller allows the fan coil unit
to be operated from within the same room without any wire
connections to the unit.
The remote controller includes a wall-mounted bracket. To
install the bracket, attach bracket to the wall as shown in
Fig. 17 using factory-supplied, double-sided tape. Install factory-
supplied batteries into the remote controller per To Install or
Replace Remote Controller Batteries section on page 12, and
place the controller into the bracket so that it will be ready
for use.
II. AFTER EXTENDED SHUTDOWNS
If the system has been turned off for more than 12 hours,
turn on the indoor and outdoor unit disconnect switches to
supply power to the system for 12 hours BEFORE starting
the system.
III. SEASONAL CHANGEOVERS
When changing heat pump system from cooling to heating or
heating to cooling, or before starting cooling only system af-
ter it has been out of use for the winter season, perform the
following steps BEFORE starting the system:
1. Inspect and clean the outdoor unit, particularly the coil.
2. Clean or replace the air filters in the indoor unit.
3. Clean the indoor unit drain pan and drain pipe, and re-
move any obstructions.
4. Turn on indoor and outdoor unit disconnect switches to
supply power to the system 12 hours before starting the
system.
Fig. 16 — Mounting Unit to Bracket
Fig. 17 — Mounting Remote Controller Bracket
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