York International XN SERIES Installation Manual Download Page 53 | Manualshive

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5188238-YIM-D-0518

Johnson Controls Ducted Systems

53

Maintenance

Normal Maintenance

Filters

Inspect once a month. Replace disposable or clean permanent
type as necessary. DO NOT replace permanent type with
disposable. The dimensional size of the replacement filter must
be the same as the replaced filter.

Motors

Outdoor fan motors are permanently lubricated and require no
maintenance.

Indoor Blower Motor and Drive - The indoor blower motor
features ball bearings that do not require periodic lubrication.

On an annual basis, check the motor for accumulations of dust,
etc. that may block the cooling slots in the motor shell. Check
for loose, damaged or misaligned drive components. Check
that all mounting bolts are tight. Replace defective parts as
required.

Outdoor Coil

Dirt should not be allowed to accumulate on the outdoor coil
surface or other parts in the air circuit. Cleaning should be as
often as necessary to keep coil clean. Use a brush, vacuum
cleaner attachment, or other suitable means. If water is used to
clean coil, be sure electric power to the unit is shut off prior to
cleaning.

NOTE:

Exercise care when cleaning the coil so that the coil fins
are not damaged.

Table 21: Cable for FC Buses and SA Buses in Order of Preference

Bus and Cable Type

Non-Plenum Applications

Plenum Applications

Part Number

O.D.

Part Number

O.D.

FC Bus:

22 AWG Stranded, 3-Wire Twisted Shielded Cable

1

1. We strongly recommend 3-wire (for FC bus) and 4-wire, 2 twisted-pair (for SA bus), 22 AWG stranded, shielded cable. A 22 gauge cable

offers the best performance for various baud rates, cable distances, and number of trunk devices primarily due to lower conductor-to-
conductor capacitance. Shielded cable offers better overall electrical noise immunity than non-shielded cable. Observe the shield
grounding requirements.

Anixter:
CBL-22/3-FC-PVC
Belden®: B5501FE

0.138 in.

Anixter: CBL-22/3-FC-PLN
Belden: B6501FE

0.140 in.

SA Bus (Terminal Block):

22 AWG Stranded, 4-Wire, 2 Twisted-

Pair Shielded Cable

Anixter:
CBL-22/2P-SA-PVC
Belden: B5541FE

0.209 in.

Anixter: CBL-22/2P-SA-PLN
Belden: B6541FE

0.206 in.

SA Bus (Modular Jack):
26 AWG Solid 6-Wire, 3 Twisted-Pair Cable

2

2. We recommend 26 AWG solid, 6-wire (3 twisted pairs) cable as the best fit for fabricating modular cables with the modular jack housing

assembly. Be sure the cable you use fits the modular jack housing. The preassembled cables that are available from Anixter (Part No.
CBL-NETWORKxxx) use 24 gauge wire.

—

—

Anixter preassembled: CBL-
NETWORK25 CBL-
NETWORK50 CBL-
NETWORK75 CBL-
NETWORK100

0.15 in.

FC Bus:

22 AWG Stranded, 3-Wire Twisted Non-Shielded Cable

Belden: B5501UE

0.135 in.

Belden: B6501UE

0.131 in.

SA Bus (Terminal Block):

22 AWG Stranded, 4-Wire, 2 Twisted-

Pair Non-Shielded Cable

Belden: B5541UE

0.206 in.

Belden: B6541UE

0.199 in.

Prior to any of the following maintenance procedures,
shut off all electric power to the unit to prevent personal
injury.

Perform all maintenance operations on the blower motor
with electric power disconnected from the unit.

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Summary of Contents for XN SERIES

Page 1: ...trol Wire Sizes 14 7 Electrical Data 16 8 XN036 060 Physical Data 28 9 Electric Heat Minimum Supply Air 30 10 Smart Equipment Economizer Board Details 32 11 Altitude Temperature Correction Factors 37 12 XN Blower Performance Side Duct 39 13 XN Blower Performance Bottom Duct 40 14 Belt Drive RPM Selection 41 15 Indoor Blower Specifications Belt Drive 41 16 Power Exhaust Specifications 42 17 Additio...

Page 2: ...never working on air conditioning equipment Be sure to follow all other applicable safety precautions and codes that apply Wear safety glasses and work gloves Use quenching cloth and have a fire extinguisher available during brazing operations Inspection As soon as a unit is received it should be inspected for possible damage during transit If damage is evident the extent of the damage should be n...

Page 3: ...stallation on combustible material This product must be installed in strict compliance with the enclosed installation instructions and any applicable local state and national codes including but not limited to building electrical and mechanical codes Improper installation may create a condition where the operation of the product could cause personal injury or property damage This system uses R 410...

Page 4: ...o Barometric RLF F Econ BAS Rdy w o Barometric RLF H Motorized Damper Outdoor Air Option 1 No Service Options 2 DSC Disconnect Switch 3 NCO Non PWR Conv Outlet 4 PCO Powered Conv Outlet 5 DSC NCO 6 DSC PCO A No Sensors B PHM Phase Monitor C DFS Dirty Filter Switch D SSD Supply Air Smoke DET E RSD Return Air Smoke DET F PHM DFS G PHM SSD H PHM RSD J DFS SSD K DFS RSD L SSD RSD M PHM DFS SSD N PHM D...

Page 5: ...ditioning Contractors of America ACCA This unit is not to be used for temporary heating of buildings If the unit is used for heating and cooling of buildings or structures under construction where the application and use must comply with all manufacturer s installation instructions including Unit must be operated under thermostatic control Return and supply air ducts must be sealed to the unit Air...

Page 6: ...gle iron frame 6 Maintain level tolerance to 1 2 across the entire width and length of unit Economizer Hood Electric Heat Accessory Location High Efficiency Compressor Highly Efficient Enhanced Copper Tube Enhanced Aluminum Fin Or Micro Channel Aluminum Tube Aluminum Fin Condenser Full Perimeter Baserails With Forklift Slots And Lifting Holes Smart Equipment Control Board Belt Drive Or Direct Driv...

Page 7: ...he largest dimension across the unit MUST be used across the top of the unit Units may be moved or lifted with a forklift Slotted openings in the base rails are provided for this purpose LENGTH OF FORKS MUST BE A MINIMUM OF 42 INCHES Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet If a unit is to be installed on a roof curb other than a York roof curb gask...

Page 8: ... Load Location lbs 6 point Load Location lbs Shipping Operating X Y A B C D A B C D E F 036 3 615 610 38 3 18 75 136 119 165 190 93 85 77 108 118 129 048 4 621 616 38 2 18 4 135 117 169 195 92 84 76 110 121 133 060 5 625 620 38 6 18 132 117 174 197 90 83 76 114 123 134 Table 3 XN036 060 Unit Accessory Weights Unit Accessory Weight lbs Shipping Operating Economizer 55 50 Power Exhaust 55 50 Electri...

Page 9: ...5188238 YIM D 0518 Johnson Controls Ducted Systems 9 Figure 5 XN036 060 Heat Pump Electric Heat Front View Physical Dimensions ...

Page 10: ...Side Filter Access 24 Less Economizer 36 With Economizer Right Side Cond Coil 24 Below Unit1 1 Units may be installed on combustible floors made from wood or class A B or C roof covering material 0 Above Unit2 2 Units must be installed outdoors Overhanging structures or shrubs should not obstruct condenser air discharge outlet NOTE Units and ductwork are approved for zero clearance to combustible ...

Page 11: ...penings Figure 9 XN036 060 Roof Curb Table 5 XN036 060 Utilities Entry Hole Opening Size Dia Used For A 7 8 KO1 1 Opening in the bottom to the unit can be located by the slice in the insulation Control Wiring Side Bottom2 2 Do not remove the 2 knockout ring B 2 KO1 Power Wiring Side Bottom ...

Page 12: ...ter POE oil Mobil 3MA POE This oil is extremely hygroscopic meaning it absorbs water readily POE oil can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants Take all necessary precautions to avoid exposure of the oil to the atmosphere POE polyolester compressor lubricants are known to cause long term damage to some synthetic roofing materials Procedures which risk oi...

Page 13: ...he wiring diagram and the same minimum gauge as the replaced wire A disconnect must be utilized for these units Factory installed disconnects are available If installing a disconnect field supplied refer to Figure 7 for the recommended mounting location NOTE Since not all local codes allow the mounting of a disconnect on the unit please confirm compliance with local code before mounting a disconne...

Page 14: ...aximum length When installing equipment in a facility with a 3 phase high leg delta power supply care must be taken to ensure that the high leg conductor is not attached to either of the two legs of the single phase direct drive X13 or ECM motors Failure to do so can result in the motor acting erratically or not running at all Check for the high leg conductor by checking voltage of each phase to g...

Page 15: ...ired on single stage heĂƟŶg units Jumper is required if there is no Smoke Detector circuit Jumper is required for any coŵďŝŶĂƟŽŶ of R RC or RH 5 5 OCC is an output from the thermostat to indicate the Occupied ĐŽŶĚŝƟon X is an input to the thermostat to display Error Status condiƟons 3 W2 Y1 G OCC Y2 X R SD 24 C W1 2 24V C 24 VAC Class 2 SD 24 Jumper Located on Harness Smoke Detector SD R 24V Outpu...

Page 16: ...21 2 2 51 83 3 90 460 3 60 5 5 43 2 7 7 0 8 2 1 0 NONE 9 8 15 E07 6 8 1 8 2 20 20 E10 10 1 1 12 1 25 25 E15 13 6 2 16 4 30 2 35 E20 19 5 2 23 5 39 1 40 575 3 60 3 8 34 6 0 8 1 9 0 NONE 7 3 15 E10 10 6 1 10 2 20 25 E15 15 9 2 15 3 26 4 30 E20 21 2 2 20 4 32 8 35 048 4 0 208 1 60 19 6 130 30 5 2 8 6 7 0 NONE 34 45 E05 4 1 19 2 58 70 E07 5 6 1 26 9 67 7 80 E10 8 1 38 5 82 1 90 E15 11 9 2 57 2 105 5 1...

Page 17: ...10 230 3 60 16 5 110 25 8 2 8 4 3 0 NONE 27 7 35 E05 5 3 1 12 7 43 7 50 E07 7 5 1 18 50 3 60 E10 10 6 1 25 5 59 6 60 E15 15 9 2 38 2 75 5 80 E20 21 2 2 51 91 5 100 E30 29 6 2 71 2 116 7 125 460 3 60 7 2 52 11 3 2 8 2 1 0 NONE 12 5 15 E07 6 8 1 8 2 22 7 25 E10 10 1 1 12 1 27 7 30 E15 13 6 2 16 4 32 9 35 E20 19 5 2 23 5 41 8 45 E30 28 8 2 34 6 55 8 60 575 3 60 5 5 38 9 8 6 2 8 1 9 0 NONE 9 9 15 E10 ...

Page 18: ... 51 83 3 90 460 3 60 5 5 43 2 7 7 0 8 2 1 0 NONE 9 8 15 E07 6 8 1 8 2 20 20 E10 10 1 1 12 1 25 25 E15 13 6 2 16 4 30 2 35 E20 19 5 2 23 5 39 1 40 575 3 60 3 8 34 6 0 8 1 9 0 NONE 7 3 15 E10 10 6 1 10 2 20 25 E15 15 9 2 15 3 26 4 30 E20 21 2 2 20 4 32 8 35 048 4 0 208 1 60 19 6 130 30 5 2 8 6 7 0 NONE 34 45 E05 4 1 19 2 58 70 E07 5 6 1 26 9 67 7 80 E10 8 1 38 5 82 1 90 E15 11 9 2 57 2 105 5 110 E20...

Page 19: ...2 52 11 3 2 8 3 15 0 NONE 13 6 20 E07 6 8 1 8 2 23 8 25 E10 10 1 1 12 1 28 7 30 E15 13 6 2 16 4 34 35 E20 19 5 2 23 5 42 9 45 E30 28 8 2 34 6 56 9 60 575 3 60 5 5 38 9 8 6 2 8 2 2 0 NONE 10 2 15 E10 10 6 1 10 2 22 9 25 E15 15 9 2 15 3 29 3 30 E20 21 2 2 20 4 35 7 40 E30 30 4 2 29 3 46 8 50 1 Minimum Circuit Ampacity 2 Dual Element Time Delay Type 3 HACR type per NEC XN036 060 Without Powered Conve...

Page 20: ...E07 5 6 1 15 5 40 7 45 E10 8 1 22 2 49 1 50 E15 11 9 2 33 62 6 70 E20 15 9 2 44 1 76 5 80 230 3 60 11 2 88 17 5 1 3 6 0 NONE 21 3 30 E05 5 3 1 12 7 37 2 45 E07 7 5 1 18 43 9 50 E10 10 6 1 25 5 53 2 60 E15 15 9 2 38 2 69 1 70 E20 21 2 2 51 85 90 048 4 0 208 1 60 19 6 130 30 5 2 8 7 6 0 NONE 34 9 45 E05 4 1 19 2 58 9 70 E07 5 6 1 26 9 68 6 80 E10 8 1 38 5 83 90 E15 11 9 2 57 2 106 4 110 E20 15 9 2 7...

Page 21: ... 2 8 7 6 0 NONE 31 40 E05 4 1 11 1 44 9 50 E07 5 6 1 15 5 50 5 60 E10 8 1 22 2 58 8 60 E15 11 9 2 33 72 3 80 E20 15 9 2 44 1 86 2 90 E30 22 2 2 61 6 108 1 110 230 3 60 16 5 110 25 8 2 8 7 6 0 NONE 31 40 E05 5 3 1 12 7 47 60 E07 7 5 1 18 53 6 60 E10 10 6 1 25 5 62 9 70 E15 15 9 2 38 2 78 8 80 E20 21 2 2 51 94 8 100 E30 29 6 2 71 2 120 125 1 Minimum Circuit Ampacity 2 Dual Element Time Delay Type 3 ...

Page 22: ... 460 3 60 5 5 43 2 7 7 0 8 2 1 5 NONE 14 8 20 E07 6 8 1 8 2 25 25 E10 10 1 1 12 1 30 30 E15 13 6 2 16 4 35 2 40 E20 19 5 2 23 5 44 1 45 575 3 60 3 8 34 6 0 8 1 9 4 NONE 11 3 15 E10 10 6 1 10 2 24 1 25 E15 15 9 2 15 3 30 5 35 E20 21 2 2 20 4 36 8 40 048 4 0 208 1 60 19 6 130 30 5 2 8 6 7 10 NONE 44 60 E05 4 1 19 2 68 80 E07 5 6 1 26 9 77 7 90 E10 8 1 38 5 92 1 100 E15 11 9 2 57 2 115 5 125 E20 15 9...

Page 23: ... 8 125 230 3 60 16 5 110 25 8 2 8 4 3 10 NONE 37 7 50 E05 5 3 1 12 7 53 7 60 E07 7 5 1 18 60 3 70 E10 10 6 1 25 5 69 6 70 E15 15 9 2 38 2 85 5 90 E20 21 2 2 51 101 5 110 E30 29 6 2 71 2 126 7 150 460 3 60 7 2 52 11 3 2 8 2 1 5 NONE 17 5 20 E07 6 8 1 8 2 27 7 30 E10 10 1 1 12 1 32 7 35 E15 13 6 2 16 4 37 9 40 E20 19 5 2 23 5 46 8 50 E30 28 8 2 34 6 60 8 70 575 3 60 5 5 38 9 8 6 2 8 1 9 4 NONE 13 9 ...

Page 24: ... 3 100 460 3 60 5 5 43 2 7 7 0 8 2 1 5 NONE 14 8 20 E07 6 8 1 8 2 25 25 E10 10 1 1 12 1 30 30 E15 13 6 2 16 4 35 2 40 E20 19 5 2 23 5 44 1 45 575 3 60 3 8 34 6 0 8 1 9 4 NONE 11 3 15 E10 10 6 1 10 2 24 1 25 E15 15 9 2 15 3 30 5 35 E20 21 2 2 20 4 36 8 40 048 4 0 208 1 60 19 6 130 30 5 2 8 6 7 10 NONE 44 60 E05 4 1 19 2 68 80 E07 5 6 1 26 9 77 7 90 E10 8 1 38 5 92 1 100 E15 11 9 2 57 2 115 5 125 E2...

Page 25: ...0 7 2 52 11 3 2 8 3 15 5 NONE 18 5 25 E07 6 8 1 8 2 28 8 30 E10 10 1 1 12 1 33 7 35 E15 13 6 2 16 4 39 40 E20 19 5 2 23 5 47 9 50 E30 28 8 2 34 6 61 9 70 575 3 60 5 5 38 9 8 6 2 8 2 2 4 NONE 14 2 15 E10 10 6 1 10 2 26 9 30 E15 15 9 2 15 3 33 3 35 E20 21 2 2 20 4 39 7 40 E30 30 4 2 29 3 50 8 60 1 Minimum Circuit Ampacity 2 Dual Element Time Delay Type 3 HACR type per NEC XN036 060 With Powered Conv...

Page 26: ...5 6 1 15 5 50 7 60 E10 8 1 22 2 59 1 60 E15 11 9 2 33 72 6 80 E20 15 9 2 44 1 86 5 90 230 3 60 11 2 88 17 5 1 3 6 10 NONE 31 3 40 E05 5 3 1 12 7 47 2 50 E07 7 5 1 18 53 9 60 E10 10 6 1 25 5 63 2 70 E15 15 9 2 38 2 79 1 80 E20 21 2 2 51 95 100 048 4 0 208 1 60 19 6 130 30 5 2 8 7 6 10 NONE 44 9 60 E05 4 1 19 2 68 9 80 E07 5 6 1 26 9 78 6 90 E10 8 1 38 5 93 100 E15 11 9 2 57 2 116 4 125 E20 15 9 2 7...

Page 27: ...5 8 2 8 7 6 10 NONE 41 50 E05 4 1 11 1 54 9 60 E07 5 6 1 15 5 60 5 70 E10 8 1 22 2 68 8 70 E15 11 9 2 33 82 3 90 E20 15 9 2 44 1 96 2 100 E30 22 2 2 61 6 118 1 125 230 3 60 16 5 110 25 8 2 8 7 6 10 NONE 41 50 E05 5 3 1 12 7 57 70 E07 7 5 1 18 63 6 70 E10 10 6 1 25 5 72 9 80 E15 15 9 2 38 2 88 8 90 E20 21 2 2 51 104 8 110 E30 29 6 2 71 2 130 150 1 Minimum Circuit Ampacity 2 Dual Element Time Delay ...

Page 28: ... kW 3 35 4 03 kW 3 20 4 5 kW 3 35 17ºF capacity rating MBH 19 000 24 900 30 000 System power KW COP 2 5 kW 2 2 3 48 kW 2 10 4 11 kW 2 14 HSPF Btu Watts hr 8 00 8 00 8 00 DIMENSIONS inches Length 82 1 4 82 1 4 82 1 4 Width 44 7 8 44 7 8 44 7 8 Height 32 5 8 32 5 8 32 5 8 OPERATING WT lbs 610 616 620 COMPRESSORS Type Scroll Scroll Scroll1 Quantity 1 1 1 CONDENSER COIL DATA Face area Sq Ft 16 88 16 8...

Page 29: ...VP56 1VL44 1VP56 1VL44 1VP56 Blower Sheave AK64 AK66 AK56 AK61 AK56 AK56 Belt A37 A39 A36 A38 A36 A38 Motor HP each 1 1 2 1 1 2 1 1 2 1 1 2 1 1 23 23 RPM 1740 1740 1740 Frame size 56 56 56 DIRECT DRIVE EVAP FAN DATA4 Quantity 1 1 1 Fan Size Inch 11 x 10 11 x 10 11 x 10 Type Centrifugal Centrifugal Centrifugal Motor HP each 3 4 1 1 RPM 1050 1050 1050 FILTERS 15 x 20 x 1 or 2 2 2 2 14 x 25 x 1 or 2 ...

Page 30: ...the damper is set proportionally between the Economizer Minimum Position and the Economizer Minimum Position Low Speed Fan set points in relationship to the VFD output percentage On a constant volume single speed supply fan system both set points should be set to the same value Free Cooling Four types of free cooling options are available dry bulb changeover single enthalpy dual enthalpy changeove...

Page 31: ...r to energize a compressor output If at any time the economizer output drops below 100 the timer stops and resets when the economizer output returns to 100 Once a compressor output is turned ON the economizer dampers continue to modulate to control the supply air temperature to the Economizer Setpoint At no time will a compressor output be turned ON if the economizer output is less than 100 even i...

Page 32: ...ermistor MAT parameter reports input status F C 3 65 VDC reading MAT to COM with open circuit Read only use in current control revision IN1 MAT LEDs at left on upper edge of economizer board POWER POWER Green UCB power indicator Lit indicates 24 VAC is present at 24V IN COM and HOT pins FAULT FAULT Red networking error and firmware error indicator 1 10th second on off flashing indicates a networki...

Page 33: ... power exhaust actuator and economizer actuator Connects through circuit trace to 24V IN pin HOT ECON 2 10 VDC output for the Economizer actuator Econ parameter reports output status 0 100 Used to position the economizer actuator for minimum position free cooling demand ventilation cooling economizer loading and purge functions COM 24 VAC common 0 10 VDC negative for economizer actuator Connects t...

Page 34: ...negative for the indoor air quality sensor Connects through circuit trace to 24V IN pin COM R 24V 24 VAC hot supplied for the outdoor air quality sensor Connects through circuit trace to 24V IN pin HOT IN6 OAQ 0 10 VDC positive input from the Outdoor Air Quality sensor OAQRange parameter sets the CO2 parts per million measured by the outdoor air quality sensor when it outputs 10 VDC OAQ parameter ...

Page 35: ...ssure sensor Connects through circuit trace to 24V IN pin COM BINARY INPUTS at right on lower edge of economizer board IN9 PURGE 24 VAC hot input from the PURGE dry contact Purge parameter reports input status False with 0 VAC input True with 24 VAC input When Purge status is True heating and cooling operation is prevented the indoor blower and power exhaust fan operate the economizer actuator is ...

Page 36: ...ensity of the air However since the air at high altitude is less dense less static pressure will be generated and less power will be required than a similar application at sea level Air density correction factors are shown in Table 11 and Figure 15 Procedure for adjusting belt tension 1 Loosen six nuts top and bottom A 2 Adjust by turning B 3 Never loosen nuts C 4 Use belt tension checker to apply...

Page 37: ...iven is at an elevation of 5 000 ft The first step is to convert this static pressure to equivalent sea level conditions Sea level static pressure 0 6 832 0 72 Enter the blower table at 1 400 sCFM and static pressure of 0 72 The rpm listed will be the same rpm needed at 5 000 ft Suppose that the corresponding BHP listed in the table is 0 7 This value must be corrected for elevation BHP at 5 000 ft...

Page 38: ...elow Size X and Model Y is found 5 1 82 BHP exceeds the maximum continuous BHP rating of the 1 5 HP motor The 2 HP motor is required 6 1478 RPM is within the range of the 2 HP drive 7 Using the 2 HP motor and drive 2 5 turns open will achieve 1478 RPM Example Supply Air Blower Performance Air Flow CFM Available External Static Pressure IWG 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RP...

Page 39: ...83 0 79 1151 0 88 1217 0 99 1280 1 10 1341 1 20 1200 727 0 40 810 0 47 889 0 56 966 0 64 1040 0 73 1110 0 82 1179 0 93 1244 1 02 1308 1 13 1369 1 23 1400 759 0 46 842 0 53 922 0 61 998 0 69 1072 0 79 1143 0 88 1211 0 98 1276 1 08 1340 1 19 1401 1 30 1600 795 0 56 878 0 63 958 0 70 1035 0 79 1108 0 88 1179 0 98 1247 1 07 1313 1 18 1376 1 28 1438 1 39 1800 836 0 68 919 0 76 999 0 84 1075 0 93 1149 1...

Page 40: ...ic Pressure IWG1 1 Blower performance includes 1 filters See STATIC RESISTANCE table for additional applications 2 See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP 3 kW BHP x 0 932 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 2 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP Field Supplied Drive Standard Drive Option...

Page 41: ...9 390 1249 403 1212 417 1172 430 4 MED HI 1388 263 1344 276 1303 290 1264 303 1222 316 1179 329 1134 343 1082 358 1013 374 3 MED 1250 208 1206 221 1164 234 1121 246 1076 258 1029 272 968 288 903 303 863 313 2 MED LOW 1151 171 1105 183 1060 195 1010 207 958 220 895 235 1 LOW 1009 130 932 134 874 145 43 5 HI 1975 636 1937 696 1900 714 1866 734 1831 749 1791 764 1743 769 1660 743 1520 685 4 MED HI 17...

Page 42: ...ll not affect the static pressure readings 3 Using an inclined manometer determine the pressure drop across a dry evaporator coil Since the moisture on an evaporator coil may vary greatly measuring the pressure drop across a wet coil under field conditions would be inaccurate To assure a dry coil the compressors should be deactivated while the test is being run 4 Knowing the pressure drop across a...

Page 43: ...he elapse of the fan off delay for cooling To be available a compressor must not be locked out due to a high or low pressure switch or Evaporator Low Limit sensor EC1 detecting a temperature below 26 F and the anti short cycle delay ASCD must have elapsed Economizer With Single Enthalpy Sensor When the room thermostat calls for cooling the low voltage control circuit from R to G and Y1 is complete...

Page 44: ... openings If the low pressure switch opens for greater than 5 seconds the UCB will de energize the compressor initiate the ASCD and stop the condenser fan If the call for cooling is still present at the conclusion of the ASCD the UCB will re energize the compressor Should a low pressure switch open three times within one hour of operation the UCB will lock out the compressor and sends an error mes...

Page 45: ...lgorithm The heat pump is allowed to operate in the heating mode until the combination of outdoor ambient temperature and outdoor coil temperature indicate that defrosting is necessary When the coil temperature is maintained below the initiate point for a given ambient temperature continuously for 4 1 2 minutes the heat pump is put into a defrost cycle This 4 1 2 minute timer eliminates unnecessar...

Page 46: ...general information section Check blower drive belt tension 6 Check the unit supply air CFM See CHECKING SUPPLY AIR CFM on page 42 7 Measure evaporator fan motor s amp draw 8 Set the room thermostat fan switch to off 9 Turn unit electrical power off Operating Instructions 1 Turn unit electrical power on 2 Set the room thermostat setting to lower than the room temperature 3 Compressor will energize...

Page 47: ...Smart Equipment Controls Sequence of Operation Overview LIT 12011950 Figure 17 Unit Control Board W1 W2 Y1 G Y2 OCC C SD 24 THERMOSTAT WIRED HERE R X Table 20 Smart Equipment UCB Details Description Function Comments Terminal Directional orientation viewed with silkscreen labels upright Limit 24 VAC power and shutdown connections from unit wiring harness at left on upper edge of UCB LIMIT Monitore...

Page 48: ...rom R Must have the OccMode parameter set for External to be effective X Hard lockout indicator 24 volt output to a light thermostat LED R 24 VAC hot for thermostat switching and power If field added external accessories for unit shutdown are used 24 VAC hot return from smoke detector condensate overflow and or user shutdown relay switching in series SD 24 If field added external accessories for u...

Page 49: ...mperature coefficient thermistor Input required for operation 3 625 VDC reading EC1 to EC1 with open circuit Used in suction line temperature safety CC2 2 refrigerant circuit Condenser Coil temperature sensor input from 10KΩ 77 F Type III negative temperature coefficient thermistor Input required for 2 compressor heat pump units not required for 2 compressor A C units not active for 1 compressor u...

Page 50: ...initiates the Heat On Fan Delay timer no input within 5 minutes from initiation of H1 output initiates an Ignition Failure alarm input for longer than 5 minutes without H1 output initiates a Gas Valve Mis wire alarm Pin Cooling and fan output connections at right on lower edge of UCB CN FAN 24 VAC hot output for the condenser fan contactor coil Output with either C1 or C2 output interrupted during...

Page 51: ...ut is needed input must be present to allow FAN output and unit operation One FAN OVR trip lasting longer than 5 minutes or three FAN OVR trips in a two hour period cause a Fan Overload Lockout and unit operation is then prevented until alarm reset Terminal SA BUS1 connections on at left on lower edge and center of UCB PWR Power for SA Sensor Actuator BUS devices Also incorporated in the J8 6 pin ...

Page 52: ...M Common for the FC Field Connected BUS BACnet MSTP communication circuit Negative of the VDC FC bus BACnet MSTP communication circuit SHLD Shield for the FC Field Connected BUS BACnet MSTP communication circuit Earth ground reference of the cable to prevent interference on the FC bus BACnet MSTP communication circuit Item Selector in red housing at left on top edge of the communication board EOL ...

Page 53: ... 1 We strongly recommend 3 wire for FC bus and 4 wire 2 twisted pair for SA bus 22 AWG stranded shielded cable A 22 gauge cable offers the best performance for various baud rates cable distances and number of trunk devices primarily due to lower conductor to conductor capacitance Shielded cable offers better overall electrical noise immunity than non shielded cable Observe the shield grounding req...

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