York International ZM Series Installation Manual Download

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5703827-XIM-A-0319

Johnson Controls Ducted Systems

Units may be moved or lifted with a forklift. Slotted openings in the base rails are provided for this purpose.

The length of the forks must be a minimum of 60 in. (1524 mm).

CAUTION

Before lifting, make sure the unit weight is distributed equally on the rigging cables
so it will lift evenly.

CAUTION

All panels must be secured in place when the unit is lifted.
The condenser coils should be protected from rigging cable damage with plywood or
other suitable material.

Summary of Contents for ZM Series

Page 1: ...irflow performance 30 Smart Equipment unit control board 37 Operation 44 Compressor operation 44 IntelliSpeed supply fan control 44 Economizer sequences 44 Dry bulb changeover 45 Single enthalpy changeover 45 Dual enthalpy changeover 45 Auto 45 Free cooling operation 45 Power exhaust 46 Setpoints 46 Inputs 46 Outputs 46 Operation 46 Smart Equipment economizer board 47 Start up for cooling operatio...

Page 2: ...meters 35 27 ZM10 12 additional static resistance imperial units 36 28 ZM10 12 additional static resistance imperial units 36 29 Cable for FC buses and SA buses in order of preference 43 30 ZM10 charging table imperial units 52 31 ZM10 charging table metric units 53 32 ZM12 charging table imperial units 54 33 ZM12 charging table metric units 55 List of figures 1 Unit shipping bracket 7 2 Return ai...

Page 3: ...person responsible for their safety Children should be supervised to ensure that they do not play with the appliance These appliances can be installed to a maximum height of 10000 ft 3000 m above sea level These appliances shall be installed in accordance with national wiring regulations WARNING Improper installation may create a condition where the operation of the product could cause personal in...

Page 4: ...Renewal parts Contact your local Ducted Systems parts distribution center for authorized replacement parts Approvals For use as a cooling only unit For outdoor installation only For installation on combustible material and may be installed directly on combustible flooring or in the U S on wood flooring or Class A Class B or Class C roof covering materials WARNING Electrical shock fire or explosion...

Page 5: ...Improper installation may create a condition where the operation of the product could cause personal injury or property damage CAUTION This system uses R 410A refrigerant which operates at higher pressures than R 22 No other refrigerant may be used in this system ...

Page 6: ...in pleated filters Cabinet Options A No economizer Service Options 1 No service options B PHM phase monitor as standard C DFS dirty filter switch D SSD supply air smoke detector E RSD return air smoke detector F PHM DFS G PHM SSD H PHM RSD J DFS SSD K DFS RSD L SSD RSD M PHM DFS SSD N PHM DFS RSD P PHM SSD RSD Q DFS SSD RSD R PHM DFS SSD RSD Additional Options Outdoor Air Options A Standard Indoor...

Page 7: ...e of the unit t Figure 1 Unit shipping bracket 2 Turn each bracket toward the ground The protective plywood covering drops to the ground 3 If an optional return air smoke detector is installed you must move the return air sensor from the factory shipped position upside down to the working position right side up Then slide the flex tube over the stub and tighten see Figure 3 t Figure 2 Return air s...

Page 8: ...ls Do not tie slab to the building foundation Roof structures must be able to support the weight of the unit and its options and accessories The unit must be installed on a solid level roof curb or appropriate angle iron frame Maintain level tolerance to 1 2 in 13 mm across the entire width and length of unit Rigging and handling Exercise care when you move the unit Do not remove any packaging unt...

Page 9: ...purpose The length of the forks must be a minimum of 60 in 1524 mm CAUTION Before lifting make sure the unit weight is distributed equally on the rigging cables so it will lift evenly CAUTION All panels must be secured in place when the unit is lifted The condenser coils should be protected from rigging cable damage with plywood or other suitable material ...

Page 10: ... 236 332 274 230 Table 3 ZM10 12 weights and dimensions metric Size kW Weight kg Center of gravity mm 4 point load location kg 6 point load location kg Shipping Operating X Y A B C D A B C D E F ZM10 10 610 608 1303 597 103 139 210 155 65 79 98 148 119 98 ZM12 43 75 651 649 1285 622 116 153 216 164 74 88 107 151 124 104 Table 4 ZM10 12 unit accessory weights Unit Accessory Weights lbs Weights kg C...

Page 11: ...tance mm Direction Distance in Distance mm Top1 1 Units must be installed outdoors Make sure that overhanging structures or shrubs do not obscure the condenser air discharge outlet 72 1829 Right 12 305 Front 36 914 Left 36 914 Rear 36 914 Bottom2 2 Units may be installed on combustible floors made from wood or class A B or C roof covering materials 0 0 15 23 in 381 mm 29 03 in 736 6 mm 29 03 in 73...

Page 12: ...try A Return air D Front B Supply air E Bottom condensate drain C Right F Left 20 1 8 in 19 1 8 in 17 1 8 in 6 13 16 in 6 13 16 in 32 11 16 in 14 1 2 in 16 3 8 in 18 1 16 in 25 9 16 in 12 5 16 in 27 1 2 in 24 in 21 in 18 in 89 in 2261 mm 830 mm 173 mm 173 mm 690 mm 457 mm 610 mm 533 mm 511 mm 486 mm 435 mm 368 mm 416 mm 459 mm 649 mm 313 mm Ø 2 469 in 3X Ø 0 875 in 22 mm 63 mm ...

Page 13: ...ure 8 ZM10 12 unit electrical entry Item Description A Disconnect switch cover B Power entry Ø 2 1 2 in 64 mm C Control entry Ø 7 8 in 22 mm D Power entry Ø 2 1 2 in 64 mm E Convenience outlet cover F Convenience outlet power entry Ø 7 8 in 22 mm A B C D E F ...

Page 14: ...ide duct dimensions Unit model number Dimension in Dimension mm A B C D A B C D ZM10 ZM12 28 1 4 18 1 16 28 1 4 18 1 4 718 459 718 464 Table 9 ZM10 12 left end duct dimensions Unit model number Dimension in Dimension mm A B C A B C ZM10 ZM12 30 358 22 580 22 330 771 09 573 53 567 18 2 7 8 in 50 8 mm 5 5 32 in 131 mm D C 31 5 8 in 787 4 mm 18 1 4 in 464 mm B A 4 5 16 in 110 mm A C B ...

Page 15: ...ght side of the unit D Front side of the unit E 2 typ F Insulated deck under the condenser section G Insulated deck under the compressor section 80 5 8 in 2050 mm 20 in 510 mm 20 in 510 mm 6 in 150 mm 30 in 760 mm 50 1 2 in 1285 mm 8 in 205 mm 14 in 355 mm 50 mm 80 5 8 in 2050 mm 50 1 2 in 1285 mm 30 1 2 in 775 mm 10 in 255 mm 59 1 4 in 1505 mm 64 1 4 in 1630 mm 76 5 8 in 1945 mm 94 in 2390 mm 50 ...

Page 16: ...ered For a bottom duct application no duct cover changes are necessary For a side duct application complete the following steps 1 Remove the side duct covers 2 Orient the supply panel with the painted surface up 3 Slide the supply panel along the bottom of the unit 4 Secure the supply panel with the factory installed bracket and two screws 5 Orient the return panel with the painted surface down 6 ...

Page 17: ...nged The compressor also uses a refrigerant oil that is extremely hygroscopic this means that it absorbs water readily They 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 R 410A compressor lubricants are known to cause long term damage to some synthetic roofing materials CAUTION Th...

Page 18: ...st be provided and field installed by the installer Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit rating plate and in Table 1 The internal wiring harnesses provided with this unit are an integral part of the design certified unit Field alteration to comply with electrical codes should not be required If any ...

Page 19: ...or 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 ground Example A or L1 phase to ground voltage reading is 120V B or L2 phase to ground voltage reading is 195 to 208V C or L3 phase to ground voltage re...

Page 20: ...20 Johnson Controls Ducted Systems Figure 17 Field wiring disconnect cooling unit with gas heat without a VFD option L1 T1 L2 T2 T3 L3 THREE PHASE POWER SUPPLY FACTORY OR FIELD SUPPLIED DISCONNECT GROUND LUG CONTACTOR 1M ...

Page 21: ...move this jumper places the unit into the occupied mode no matter what the occupancy demand is from the thermostat or EMS system To allow Thermostat or EMS control of the occupied mode for the unit remove this jumper during commissioning Table 10 Control wire sizes Wire size Maximum length1 1 From the unit to the thermostat and back to the unit 18 AWG 150 feet 46 meters 1 Second stage heating is n...

Page 22: ...er standard UL 1995 3 Fuse or HACR circuit breaker size installed at the factory or field installed Non fused disconnect On the unit nameplate verify that the disconnect is properly sized for the application Units with field installed electric heat kits may exceed the factory installed disconnect amperage rating RLA LRA MCC FLA FLA ZM10 10 380 20 7 110 0 29 0 0 8 4 9 31 9 35 415 20 7 118 0 29 0 0 ...

Page 23: ...ps 100 Voltage phase Hz 380 420 3 50 Condenser coil data Face area Sq Ft 47 1 2 Rows 2 Fins per inch 15 Tube diameter in MM 0 375 Circuitry type Split face Evaporator coil data Face area Sq Ft 13 2 Rows 4 Fins per inch 15 Tube diameter 0 375 Circuitry type Intertwined Refrigerant control TXV Condenser fan data Quantity of fans 4 Fan diameter inches 24 Type Prop Drive type Direct Quantity of motors...

Page 24: ... 420 3 50 Condenser coil data Face area mm2 4412893 Rows 2 Fins per inch 25 mm 15 Tube diameter mm 9 525 Circuitry type Split face Evaporator coil data Face area mm2 1226319 6 Rows 4 Fins per inch 15 Tube diameter mm 9 525 Circuitry type Intertwined Refrigerant control TXV Condenser fan data Quantity of fans 4 Fan diameter mm 610 Type Prop Drive type Direct Quantity of motors 4 Motor HP each 1 4 V...

Page 25: ...s 50 100 Voltage phase Hz 380 420 3 50 Condenser coil data Face area Sq Ft 47 1 2 Rows 2 Fins per inch 15 Tube diameter in MM 0 375 Circuitry type Split face Evaporator coil data Face area Sq Ft 13 2 Rows 4 Fins per inch 15 Tube diameter 0 375 Circuitry type Intertwined Refrigerant control TXV Condenser fan data Quantity of fans 4 Fan diameter inches 24 Type Prop Drive type Direct Quantity of moto...

Page 26: ...80 420 3 50 Condenser coil data Face area mm2 4412893 Rows 2 Fins per inch 25 mm 15 Tube diameter mm 9 525 Circuitry type Split face Evaporator coil data Face area mm2 1226319 6 Rows 4 Fins per inch 15 Tube diameter mm 9 525 Circuitry type Intertwined Refrigerant control TXV Condenser fan data Quantity of fans 4 Fan diameter mm 610 Type Prop Drive type Direct Quantity of motors 4 Motor HP each 1 4...

Page 27: ...al position use a straight edge from sheave to sheave as a reference line The recommended deflection force is as follows Tension new belts at the max deflection force recommended for the belt section 5 Re tighten the belt nuts CAUTION When you install equipment in a facility with a 3 phase high leg delta power supply you must take care to ensure that the high leg conductor is not attached to eithe...

Page 28: ... air However since the air at high altitude is less dense less static pressure is generated and less power is required than a similar application at sea level Air density correction factors are shown in Table 18 and Figure 20 Item Component A Belt nuts B Adjustment bolt C Static nut Table 18 Altitude and temperature correction factors Air temp Altitude feet 0 1000 2000 3000 4000 5000 6000 7000 800...

Page 29: ...832 1 66 Example 2 A system located at 5 000 feet of elevation is to deliver 3 000 CFM at a static pressure of 1 4 in Use the unit blower tables to select the blower speed and the BHP requirement Solution As in the example above no temperature information is given so 70 F is assumed The 1 4 in static pressure given is at an elevation of 5 000 ft The first step is to convert this static pressure to...

Page 30: ...3 2 58 957 2 72 1008 2 85 1061 2 98 1124 3 12 Available Standard Static with BK72 x 1VP44 sheave combination with Motor rated at 3 HP Field Supplied Sheave combination ZM10 35 kW side duct metric units m s Available external static Pa1 1 The blower performance includes 2 inch filters See the static resistance table for additional applications Note See the RPM selection table to determine the requi...

Page 31: ...1 5 35 Available Standard Static with BK90 x 1VP56 sheave combination with Motor rated at 3 HP Field Supplied Sheave combination ZM12 43 75 kW side duct metric units m s Available external static Pa1 1 The blower performance includes 2 inch filters See the static resistance table for additional applications Note See the RPM selection table to determine the required motor sheave setting and to dete...

Page 32: ...9 3 38 1258 3 56 1330 3 71 1400 3 81 Available Standard Static with BK72 x 1VP44 sheave combination with Motor rated at 3 HP Field Supplied Sheave combination ZM10 35 kW bottom duct metric units m s Available external static Pa1 1 The blower performance includes 2 inch filters See the static resistance table for additional applications Note See the RPM selection table to determine the required mot...

Page 33: ...5 5 78 Available Standard Static with BK72 x 1VP44 sheave combination with Motor rated at 3 HP Field Supplied Sheave combination ZM12 43 75 kW bottom duct metric units m s Available external static Pa1 1 The blower performance includes 2 inch filters See the static resistance table for additional applications Note See the RPM selection table to determine the required motor sheave setting and to de...

Page 34: ...d s ZM10 35 Standard 3 3 BK110 1VP65 73 89 76 97 80 05 83 13 86 21 89 28 92 36 ZM12 43 75 Standard 3 3 BK90 1VP56 N A 86 59 90 44 94 29 98 14 101 98 101 98 Table 23 Indoor blower specifications imperial units Size tons Motor Motor sheave Blower sheave Belt HP RPM Eff SF Frame Datum dia in Bore in Model Datum dia in Bore in Model ZM10 10 3 1470 0 895 1 15 184T 4 8 6 0 1 1 8 1VP65 10 0 1 0 BK110 BX5...

Page 35: ... CFM Example new motor Amps Speed increase 3 Original Amps New Amps Speed increase 3 Amps at 1 350 CFM CAUTION Before making any blower speed changes review the installation for any installation errors leaks or undesirable systems effects that can result in loss of airflow Even small changes in blower speed can result in substantial changes in static pressure and BHP BHP and AMP draw of the blower...

Page 36: ...ded Table 26 ZM10 12 additional static resistance imperial units CFM Cooling only1 1 Add these values to the available static resistance in the respective blower performance tables 1900 0 06 2100 0 07 2300 0 08 2500 0 09 2700 0 11 2900 0 12 3100 0 14 3300 0 16 3500 0 18 3700 0 20 3900 0 23 4100 0 25 4300 0 28 4500 0 30 4700 0 33 4900 0 36 5100 0 39 Table 27 ZM10 12 additional static resistance met...

Page 37: ...re reset when the ClgStgs parameter is set for 1 or more G Continuous indoor blower request 24 VAC input switched from R OCC Occupancy request 24 VAC input switched from 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 shut...

Page 38: ...inate temporary occupancy COM Common for ST and SSO inputs Negative of VDC circuit for ST and SSO inputs SSO Space Sensor Offset input from 0 to 20KΩ potentiometer Positive of VDC circuit 3 625 VDC reading to COM with open circuit 10KΩ 2 5 VDC is 0 F offset 0Ω 0 VDC is maximum above offset and 20KΩ 3 4 VDC is maximum below offset from active space temperature setpoint Smart Equipment UCB temperatu...

Page 39: ...thin 30 seconds of initiation of indoor blower operation and not open for greater than 10 seconds during indoor blower operation to allow heat cool operation and prevent an APS open alarm the air proving switch must open within 30 seconds of termination of indoor blower operation to prevent an APS stuck closed notification alarm APS lower pin 24 VAC hot out for Air Proving Switch Connects through ...

Page 40: ...entilation cooling reheat or heat pump heating demands C2 24 VAC hot output for compressor 2 Not effective for one stage compressor UCBs If demand is present and permissions allow compressor 2 operation output with compressor cooling comfort ventilation cooling or heat pump heating demands Smart Equipment UCB refrigerant circuit safety switch and indoor blower overload connections Location Label D...

Page 41: ... Multi Touch gateway C Common for SA BUS power and communication circuits Also incorporated in the J8 6 pin phone jack connector at the left center of the board Negative of the SA BUS circuits Communication for SA BUS devices Also incorporated in the J8 6 pin phone jack connector at the left center of the board Positive of the VDC typically a fluctuating 1 5 to 3 5 volts reading to C at least 0 25...

Page 42: ... than FC bus BACnet MSTP communication circuit FC FC Field Connected BUS BACnet MSTP communication Positive of the VDC typically a fluctuating 1 5 to 3 5 volts reading to COM at least 0 25 volts lower than FC bus BACnet MSTP communication circuit COM Common for the FC Field Connected BUS BACnet MSTP communication circuit Negative of the VDC FC bus BACnet MSTP communication circuit SHLD Shield for ...

Page 43: ...501FE 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 Cable2 2 We recommend 26 AWG solid 6 wire 3 twisted pairs cable as the best fit for fabricating modular cable...

Page 44: ... from the VFD terminal on the UCB for controlling the speed of the VFD drive 3 VFD operation 2 10vdc output from the VFD terminal on the UCB operates the supply fan VFD proportional to the minimum and maximum frequency settings of the VFD drive defaults 25hz 60hz 4 Supply fan only operation When there is no demand for heating or cooling the supply fan to run operate at the percent output that rela...

Page 45: ... cooling is not available Free cooling operation When the control determines that the outside air is suitable the first stage of cooling is always be free cooling Thermostat In free cooling with a thermostat input to Y1 the dampers modulate to control the supply air temperature to the economizer setpoint 1 F default 55 F If the thermostat provides an input to Y2 and the compressors off in free coo...

Page 46: ...ng Power Exhaust OFF d Exhaust VFD Installed OFF e Building Pressure Sensor Enabled OFF f Econo Damper Position For Exh Fan ON Percent g Econo Damper Position For Exh Fan OFF Percent Inputs No inputs are present for non modulating power exhaust Outputs a 2 10 VDC from ECON on Economizer Expansion module b 24 VAC from EX FAN to energize exhaust fan on Economizer Expansion module Operation Operation...

Page 47: ...cuit trace to 24V IN pin HOT C COM Mixed air temperature sensor input from 10KΩ 77 F Type III negative temperature coefficient thermistor The 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 H R 24V 24 VAC hot supplied for the outdoor air humidity sensor Connects through circuit trace to 24V IN pin HOT IN3 OAH 0 ...

Page 48: ...station sensor MOA Range parameter sets the cubic feet per minute liters per second measured by the air monitoring station sensor when it outputs 10 VDC Fr Air parameter reports input status 0 50000CFM 23595lps Used for economizer minimum position reset in speed controlled indoor blower applications C COM 24 VAC common 0 10 VDC negative for the air monitoring station sensor Connects through circui...

Page 49: ... communication circuit to the UCB Through the unit wiring harness may continue on to the 4 stage board and or fault detection diagnostics board Smart Equipment economizer board analog outputs Location Board label Cover label Description Function and comments D J4 EX VFD 2 10 VDC positive output for the modulating power Exhaust fan Variable Frequency Drive discharge damper modulating power exhaust ...

Page 50: ...output to energize power exhaust fan contactor coil VFD enable relay coil ExFan parameter reports output status Off On when ExFType selection is Non Modulating Modulating Damper or Variable Frequency Fan Used to turn on enable the power exhaust fan motor COM 24 VAC common 0 10 VDC negative for economizer actuator Connects through circuit trace to 24V IN pin COM Smart Equipment economizer board 24V...

Page 51: ...ipment must be energized at least 10 hours before the system is put into operation 2 Set the room thermostat setting to lower than the room temperature The first stage compressors energize after the built in time delay of five minutes Post start check list 1 Verify the proper system pressures 2 Measure the temperature drop across the evaporator coil Troubleshooting WARNING Troubleshooting of compo...

Page 52: ...6 484 8 117 0 16 2 18 1 125 127 2 43 5 521 5 123 5 15 3 19 1 400 Cfm Ton 80 67 95 140 3 49 0 362 5 94 6 21 9 15 0 105 144 0 50 4 418 7 104 5 20 6 16 4 115 147 6 51 7 474 9 114 4 19 3 17 8 118 4 150 7 53 1 484 0 116 4 19 0 17 7 125 151 3 53 1 531 1 124 3 18 1 19 2 400 Cfm Ton 86 72 95 154 6 54 2 367 0 95 0 22 8 15 2 105 157 8 55 4 422 9 104 9 21 7 16 6 115 161 1 56 7 478 7 114 7 20 5 17 9 118 4 162...

Page 53: ... 6 4 3595 9 50 8 26 3 19 1 400 Cfm Ton 27 19 35 967 3 9 4 2499 2 34 8 29 9 15 0 41 992 6 10 2 2886 6 40 3 29 2 16 4 46 1017 9 11 0 3274 1 45 8 28 5 17 8 48 0 1039 0 11 7 3337 1 46 9 28 4 17 7 52 1043 2 11 7 3661 6 51 3 27 8 19 2 400 Cfm Ton 30 22 35 1065 6 12 3 2530 6 35 0 30 5 15 2 41 1088 1 13 0 2915 7 40 5 29 8 16 6 46 1110 6 13 7 3300 8 46 0 29 2 17 9 48 0 1118 3 13 9 3431 7 47 8 29 0 18 4 52 ...

Page 54: ...21 1 16 9 26 6 125 125 5 43 0 530 9 128 1 16 1 27 7 400 Cfm Ton 80 67 95 141 6 49 4 366 8 99 2 21 7 23 3 105 144 2 50 4 423 7 109 4 20 4 24 9 115 146 8 51 4 480 7 119 7 19 2 26 5 118 4 147 7 51 8 500 1 123 2 18 7 27 0 125 149 4 52 5 537 7 130 0 17 9 28 1 400 Cfm Ton 86 72 95 152 4 53 6 370 7 99 1 22 3 23 5 105 155 9 54 8 427 7 109 7 21 1 25 1 115 159 4 56 1 484 7 120 3 19 9 26 7 118 4 160 6 56 5 5...

Page 55: ...6 1 3660 2 53 4 26 7 19 1 400 Cfm Ton 27 19 35 976 0 9 7 2528 9 37 3 29 8 15 0 41 994 1 10 2 2921 6 43 0 29 1 16 4 46 1012 2 10 8 3314 4 48 7 28 4 17 8 48 0 1018 3 11 0 3448 0 50 7 28 2 17 7 52 1030 3 11 4 3707 2 54 4 27 7 19 2 400 Cfm Ton 30 22 35 1050 8 12 0 2556 2 37 3 30 2 15 2 41 1074 9 12 7 2948 9 43 2 29 5 16 6 46 1099 1 13 4 3341 6 49 1 28 8 17 9 48 0 1107 3 13 6 3475 1 51 1 28 6 18 4 52 1...

Page 56: ...ile Access Portal MAP Gateway Portable Source 1 P N S1 JC MAP1810 OP 3 MAP Gateway Quick Start Guide only available in English P N 24 10737 16 4 MAP Gateway Instruction only available in English P N 24 10737 8 For more information on the Smart Equipment unit control board navigation refer to the Smart Equipment Quick Start Guide only available in English NOTE For more in depth sequence of operatio...

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Page 63: ...limitations of the system Complete the installation information on page 67 Table of contents System operation 64 Thermostats 64 Operating instructions 64 General maintenance 65 Inspecting the unit 65 Air filters 65 Blower assembly 66 Motors 66 Condenser coil 66 Registers 66 Troubleshooting 66 Installation information 67 WARNING Fire or explosion hazard Failure to follow safety warnings exactly cou...

Page 64: ...do not place items such as lamps radios and television sets near the thermostat Figure 1 Typical thermostat Operating instructions Shutting down the unit Turn off the electrical power supply Starting the unit 1 Adjust the setpoint of the room thermostat above the temperature in the space 2 Turn on the electrical power supply WARNING Electrical shock fire or explosion hazard Failure to follow safet...

Page 65: ...oncrete slab or roof curb is sound and not in need of repair Make sure that there are no gaps between the roof curb and the unit where rain could leak into the building Air filters All ZM units require four filters The filter racks on these units receive either 1 inch or 2 inch filters Filters can also be installed in the building at a suitable return air location if an economizer or outside air a...

Page 66: ... grease just begins to show at the seals Do not over lubricate Use any lithium base grease recommended for ball bearing service Condenser coil Check the outdoor coil annually Clean the coil as often as necessary to keep the coil clean Clean any debris and dirt from the outside coil face with a brush being careful not to damage the fins If the coil is extremely dirty you can use a hose to wash the ...

Page 67: ...n 5005 York Drive Norman Oklahoma 73069 U S A Installation information When the unit is installed and it is operating correctly ensure that the installer completes the following information Keep this information Installed by Installer s address Installation date Owner s name Owner s address Unit installed at address Installation date Unit model number Unit serial number Distributor name ...

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