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York H*RA, Installation Instructions Manual

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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)

Summary of Contents for H*RA

Page 1: ...ir Conditioning and Refrigeration Institute Using unmatched components may not only affect the performance of the system but may also void the warranty of the equipment Do not install any coil in a furnace which is to be operated during the heating season without attaching the refrigerant lines to the coil Allowing the coil charge to enter the refrigerant lines prevents excessive refrigerant press...

Page 2: ...utdoor coil can be eliminated by placing the outside unit where the wind does not blow across the unit Trees shrubs corners of buildings and fences standing off from the coil can reduce capacity loss due to wind chill effect Provide ample clearance from shrubs to allow adequate air to pass across the outdoor coil without leaves or branches being pulled into the coil Consideration should be given t...

Page 3: ... and permitted to flow through tubing during brazing to displace air and prevent oxidation Remove the Schrader valve cores from the service valves Remove the plugs from the service valve field tubing connec tions Clean the joints to be brazed NOTE Do not overheat the connection to be brazed as this can cause improper flow of solder resulting in a weak and leaking joint Never apply heat directly to...

Page 4: ...nd the refrigerantlines maybeconnectedpertheoutdoorunitinstruction However if another orifice should be used see the coil instruction for details to change to change the orifice in the coil OPENING BASE VALVES All models in this series have brass service valves These valves are not back seating Opening or closing valve does not close service port Service ports have Schrader valves for gauge connec...

Page 5: ... Figures 3 and 4 5 Ground the outdoor unit using the ground lug provided Unless the outdoor unit is grounded through proper wiring to the service entrance ground a suitable separate ground should be provided at the outdoor unit C O N T A C T O R S T A R T R E L A Y N o t o n a l l M o d e l s F A N M O T O R P L U G D U A L R U N F A N C A P A C I T O R S T A R T C A P A C I T O R N o t o n a l l ...

Page 6: ...ined as follows 1 Determine outdoor unit charge from tabular data sheet 2 Determine indoor coil adjustment from tabular data sheet 3 Calculate the line charge using Table 2 factors Calculate over 15 feet of sweat lines for sweat connect units NOTE For sweat connect lines the line charge over 15 feet should be included on the data plate and must be added to the system 4 Total system charge item 1 i...

Page 7: ... 73 75 77 79 79 2 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 82 4 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 Saturation Temperature TABLE 4 Temperature and Pressure TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG 45 76 02 60 101 62 75 132 22 90 168 40 105 210 75 46 77 58 61 103 49 76 134 45 91 171 02 106 213 81 47 79 17...

Page 8: ...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 namepl...

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