INSTALLER'S GUIDE
CHECKOUT PROCEDURE
After installation has been completed, it is recommended that the entire system be checked against the
following list:
1. Refrigerant Line, Leak checked .......................................................................................................... [ ]
2. Suction Lines and Fittings properly insulated ...................................................................................... [ ]
3. Have all Refrigerant Lines been secured and isolated properly? ........................................................ [ ]
4. Have passages through masonry been sealed? If mortar is used, prevent mortar from
coming into direct contact with copper tubing ..................................................................................... [ ]
5. Indoor coil drain line drains freely. Pour water into drain pan ............................................................. [ ]
6. Supply registers and return grilles open and unobstructed ................................................................. [ ]
7. Return air filter installed ...................................................................................................................... [ ]
8. Thermostat thermometer is accurate. Check against a reliable thermometer. Adjust
per instructions with thermostat .......................................................................................................... [ ]
9. Is correct speed tap being used? (Indoor blower motor) .................................................................... [ ]
SYSTEM OPERATIONAL CHECK
IMPORTANT: To prevent compressor damage which may result from the presence of LIQUID refrigerant in the
crankcase, these procedures should be followed at initial Start-Up and at anytime the power has been offfor 12 hours
or more.
1. Before proceeding with this "Operational Check," go to "Compressor Sump Heat Section" of this instruction to
determine the time compressor heat has been "ON," and make entry d the designated lines, in Step 2.
2. Start-Up Time A.M./P.M. Power Applied Time A.M./P.M.
Time Lapse Hours Minutes.
3. If Steps 1 and 2 cannot be used, then place thermostat's system switch in the "OFF" position and apply power
by closing system disconnect switch. This energizes compressor heat and evaporates the liquid in the
crankcase. TO EVAPORATE LIQUID ALLOW AT LEAST ONE-HALF HOUR PER POUND (HCFC-22), AS
SHOWN ON UNIT NAMEPLATE.
OPERATING PRESSURES: After the unit has operated in the cooling mode for a short period of time, install
pressure gauges on the gauge ports of the discharge and suction line valves. Check the suction and discharge
pressures and compare them to the normal operating pressures provided in the unit's Service Facts.
NOTE: Use the pressures from Service Facts to determine the unit refrigerant charge.
To charge the system accurately, use superheat charging, or pressures
depending on flow control.
4. Except as required for safety while servicing: DO NOT OPEN SYSTEM DISCONNECT SWITCH.
SUPPLEMENTARY HEATERS CHECKOUT PROCEDURES, IF USED
DOES HEATER REQUIRE A SEPARATE CIRCUIT?
1. Be sure the fused disconnect switch is "OFF," and safety label (if any) is attached ................................ [ ]
2. Check on field wiring for sound connections and grounding according to codes .................................... [ ]
3. Check fuses for proper size per nameplate specifications ..................................................................... [ ]
4. Check control box panel -- in place and secured .................................................................................. [ ]
NOTE: OPERATION OF HEATERS MUST BE CHECKED DURING THE OPERATION CHECKOF THE TOTAL
SYSTEM.
Pub. No. 18-AC34D1-5 PAGE 7
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