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
suction 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.
CHECK-OUT PROCEDURE
Use the following list to see that nothing was over looked.
Have all braze joints on refrigerant lines been leaked
checked?
Have base valves been opened?
Have all refrigerant lines been secured and isolated
properly?
Is the indoor coil drain hooked up and draining freely? Pour
water in drain pan.
Is air filter installed and clean?
Is blower motor speed set correctly?
SYSTEM OPERATION CHECK-OUT
STEP 1 - With thermostat set to the OFF position, close
disconnect switch or switches to complete circuits to condens-
ing unit, furnace or air handler. Set thermostat to call for cooling.
STEP 2 - After the system starts, check the voltage and
amperage at the condensing unit contactor.
STEP 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.
STEP 4 - With the system in operation, check the condensing
unit for unusual noises and undue vibration.
STEP 5 - Allow the system to operate until it is balanced or
stabilized (approximately 30 minutes), before making further
checks.
STEP 6 - Remove manifold gage hoses and install cap on
Schrader valves.
INSTALLER
After installation is complete, place unit data sheet and instal-
lation instructions in customer envelope and give to home
owner.
Subject to change without notice. Printed in U.S.A
Copyright
by Unitary Products Group 1999. All Rights Reserved.
Heating and Air Conditioning
Unitary Products Group
5005 York Drive, Norman, Oklahoma 73069
Code: SBY
550.46-N1YI (199)
