Carrier 38AN - Manual (Page 14)

START-UP
Complete the following checks and the Start-Up Check­
list on pages CL-1 and CL-2 before system start-up.
1. Check condensate drainage system. Refer to Fig. 4
and 10. Add water to check the drainage flow. If water
does not flow steadily, check the pipe slope or see if there
are any restrictions.
2. Make sure all wiring connections are correct and tight,
3. Be sure all barriers, covers, and panels are in place,
4. Ensure that the filters have been installed and that the air
discharge louvers are correctly positioned.
A WARNING
Never operate unit without a filter. Damage to the
unit could result.
5. Fully backseat (open) the liquid and vapor tube service
valves,
6. Unit is shipped with valve stems frontseated and caps fac­
tory installed. Replace stem caps after system is opened
to refrigerant flow (backseated). Replace caps finger tight.
7. With the remote controller, turn on the unit and operate
in each mode (as applicable) for 15 minutes to test for
proper operation. Do not operate in Cooling mode if out­
door temperature is below 55 F, 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.
8. Test for proper refrigerant charge using the superheat method.
9. Explain basic system operation to the owner.
40QN Control System — The 40QN 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 in­
door coil. The 40QNE/H heat pump fan coil units also have
thermistors located on the outdoor coil and in the outdoor air
inlet. These thermistors monitor system operation and con­
trol the operating mode. To change settings or modes of op­
eration, use the factory-supplied infrared wireless remote
controller. This controller allows the fan coil imit to be op­
erated from within the same room without any wire connec­
tions to the unit.
Wireless Remote Controllers — A wireless remote
controller is supplied for system operation of all high
wall units. Each battery-operated wireless (infrared) remote
controller may be used to control more than one unit. The
wireless remote controller has a maximum range of 20 feet.
The fan coil unit is equipped with an emergency switch
which allows operation if the remote controller malfunc­
tions or is misplaced. Because the controller uses infirared
REMOTE
COtiTROLLER
BRACKET
communication, all of the following must be true for the con­
troller to work properly;
1. The power must be on to the fan coil unit.
2. The batteries in the controller must be good.
3. The controller must be within range of and pointed di­
rectly at the fan coil unit.
4. The fan coil unit’s 3-position switch must be set in the
remote position.
The remote controller includes a wall-mounted bracket.
To install the bracket, attach bracket to the wall as shown in
Fig. 13 using factory-supplied, double-sided tape. Install factory-
supplied batteries into die remote controller per To Install or
Replace Remote Controller Batteries section on page 18, and
place the controller into the bracket so that it will be ready
for use.
After Extended Shutdowns — If the system has been
turned off for more than 12 hours, turn on the indoor and
outdoor unit discormect switches to supply power to the sys­
tem for 12 hours BEFORE starting the system.
Seasonal Changeovers — When changing heat pump
system from cooling to heating or heating to cooling, or be­
fore starting cooling only system after it has been out of use
for the winter season, perform the following steps
BEFORE starting the system:
1. Insftóct 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 the indoor and outdoor unit disconnect switches
to supply power to the system for 12 hours before start­
ing the system.
To Turn the Unit On and Off — To turn the unit on,
press the orange ON/OFF button (see Fig. 14). Unit will start.
To stop unit operation, press the ON/OFF button again. Unit
will stop. Refer to Owner’s Manual enclosed witii the fan
coil unit for full remote control operating details.
Adjusting Airflow — The airflow direction may be ad­
justed up and down using the remote controller, and from
side to side by manually moving the vents. For cooling only
units and heat pump units when in the cooling mode, set the
louvers to discharge straight out (parallel to the floor) (see
Fig, 15). For the heat pump units operating in Heating mode,
it is recommended that the air discharge louvers be set to
discharge vertically (see Fig. 15).
The Swing Range shown in Fig. 15 is the range which
will provide maximum occupant comfort in each mode. It is
recommended that the louvers be positioned within this range
(using the remote controller).
NOTE: The full swing range for the selected mode will au­
tomatically be used if auto, fan mode is selected.
Opersting Mode Memory— After the system is turned
off or after a power failure, tiie system remains in the last
operating mode selected. When the system is turned back on
or when power is automatically restored, operation contin­
ues in the same operating mode as when power shut down.
Automatic Operation (Auto.) Mode— if Auto, mode
is selected, the system automatically switches the operating
mode from heating (heat pump systems only) to cooling, or
from cooling to heating (heat pump system only) depending
on the selected temperature,
NOTE: Between the cooling cycle and the heating cycle there
is a neutral zone of approximately 2° F above and 2° F be­
low the selected temperature when only the fan is
operating.
Fig. 13 — Mounting Remote Controller Bracket
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