Start-Up; After Extended Shutdown; Seasonal Changeovers - Carrier 40QA Installation, Start-Up And Service Instructions Manual

Mode
Fan
Fig. 19 — Remote Thermostat

START-UP

Never operate unit without a filter or with grille re-
moved; damage to the unit or personal injury may re-
sult.
Make the following checks and complete the Start-Up Check-
list on pg CL-1 before system start-up. Refer to 38HDC,
38HDS, or 38QRC Installation, Start-Up and Service In-
structions
for system start-up instructions and refrigerant charging
methods.
1. Check condensate drainage system:
a. Remove grille and frame from the unit.
b. On the opposite side of the drain connection, insert a
water bottle up into the fan coil unit and fill drain pan.
Refer to Fig. 22. Water must flow steadily; if not, check
the pipe slope or inspect for any pipe restrictions.
Air Sweep
Day/Night
13
TB — Terminal Block
*Heat pump units only.
Fig. 20 — Cooling Only Systems or Condensing Unit
Matched with Heat Pump Fan Coil Unit Thermostat
Wiring
2. Make sure that all wiring connections are correct and that
they are tight.
3. Check that all barriers, covers, and panels are in place.
Ensure that the filters and return-air grilles have been
installed and that the discharge louvers are positioned
correctly.
After Extended Shutdown —
turned off for more than 12 hours, turn on the indoor and
outdoor unit disconnect switches to supply power to the sys-
tem for 12 hours BEFORE starting the system.
Seasonal Changeovers —
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. 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.
If the system has been
When changing heat pump