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035-13606-003 Rev. A (202)
10 Unitary Products Group
3. Measure and record the suction pressure at the suction
service valve port.
4. Using Table 4, note the superheat value corresponding
to the intersection of the indoor wet bulb and the outdoor
dry bulb.
5. With the superheat value obtained in step 4 and the suc-
tion pressure value from step 3, find the intersection of
the values in Table 5. This is the required suction tube
temperature at the suction service valve.
6. To bring the tube temperature in line with the required
value from Table 5, add refrigerant to the service port to
cause the tube temperature to fall and reclaim refrigerant
to cause the temperature to rise.
CHECKOUT PROCEDURE
Use the following list to see that nothing was over looked:
1. Have all braze joints on refrigerant lines been leak
checked? (Sweat Fit Units)
2. Line set fittings leak checked? (Quick Connect Units)
3. Have base valves been opened? (Sweat Fit Units only)
4. Have all refrigerant lines been secured and isolated
properly?
5. Is the indoor coil drain hooked up and draining freely?
Pour water in drain pan.
6. Is air filter installed and clean?
7. Is the blower motor speed set correctly?
IMPORTANT - Installer should place unit data sheet and
installation instructions in customer packet and give to home
owner after installation is complete.
SYSTEM OPERATION CHECKOUT
1. With thermostat set to the OFF position, close discon-
nect switch or switches to complete circuits to condens-
ing unit and furnace. Set thermostat to call for cooling.
2. After the system starts, check the voltage and amperage
at the condensing unit contactor.
3. If voltage is not within 10% of rated voltage, or amperage
greatly exceeds nameplate amperage, shut down the
system and contact the local power company for correc-
tions; otherwise unsatisfactory performance may result.
4. With the system in operation, check the condensing unit
for unusual noise and undue vibration.
5. Allow the system to operate until it is balanced or stabi-
lized (approximately 30 minutes), before making further
checks.
6. Remove manifold gages hoses, and install cap on
Schrader valves.