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GENERAL

These Model DHC units are single package air conditioners
designed for outdoor installation on a rooftop or a slab. These
units can be equipped with factory installed electric heaters for
cooling/heating applications.

The units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electrical
wiring is factory installed and tested. The units require electric
power, duct connections and installation of fixed outdoor air
intake damper (units without economizer or motorized damper
option only) at the point of installation.

The supplemental electric heaters have nickel-chrome
elements and utilize single point power connection.

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 noted on the carrier's freight bill. A separate
request for inspection by the carrier's agent should be made in
writing.

REFERENCE

Additional information on accessory installation and service
parts on this equipment is available in the following reference
forms:

44-320-10   - Barometric Relief Damper Accessory

Renewal Parts:

Refer to the Renewal Parts Manual for complete listing of
replacement parts on this equipment.

All forms referenced in this instruction may be ordered from:

Standard Register
2101 West Tecumseh Road
Norman, Oklahoma 73069
Toll Free Fax: (877) 379-7920
Toll Free Phone: (877) 319-9675

APPROVALS

Design certified by ETL & CGA as follows:

1. For use as a central cooling only unit with or without supple-

mental electric heat.

2. For outdoor installation only.

3. For installation on combustible material.

SINGLE PACKAGE AIR CONDITIONERS

WITH OR WITHOUT

SUPPLEMENTAL ELECTRIC HEAT

INSTALLATION
INSTRUCTION

Supersedes:  530.22-N5W (1194)

530.22-N5W (500)

MODELS DAHC180 & 240

(9.5 EER)

035-12558

208/230/575 VOLT

MODELS ONLY

Installer should pay particular attention to the words: NOTE, CAUTION and WARNING. Notes are intended to clarify or make the
installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury
and/or equipment damage may result if installation procedure is not handled properly.

208/230/460 VOLT

MODELS ONLY

CAUTION

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.

WARNING

INCORRECT INSTALLATION MAY CREATE A CONDITION
WHERE THE OPERATION OF THE PRODUCT COULD CAUSE
PERSONAL INJURY OR PROPERTY DAMAGE

Summary of Contents for DAHC180

Page 1: ...al for complete listing of replacement parts on this equipment All forms referenced in this instruction may be ordered from Standard Register 2101 West Tecumseh Road Norman Oklahoma 73069 Toll Free Fax 877 379 7920 Toll Free Phone 877 319 9675 APPROVALS Design certified by ETL CGA as follows 1 For use as a central cooling only unit with or without supple mental electric heat 2 For outdoor installa...

Page 2: ...ly Air Blower Perf 20 Ton 11 7 Static Resistances 12 8 Power Exhaust Performance 12 9 Blower Motor and Drive Data 12 10 Electrical Data Basic Units 13 11 Electrical Data Units w Elec Heat 13 12 Heat Anticipator Setpoints 15 FIGURES No Description Page 1 Typical Rigging 3 2 Center of Gravity 3 3 Fixed Outdoor Air Damper 4 4 Recommended Drain Piping 4 5 Typical Field Wiring 5 6 Adjusting Enthalpy Se...

Page 3: ...n the base rails Spreaders whose length exceeds the larger dimension across the unit MUST be used across the top of the unit Refer to Figure 1 Units may also be moved or lifted with a forklift from the front or rear only providing that an accessory skid is used LENGTH OF FORKS MUSTBE AMINIMUM OF 90 INCHES Refer to Table 4 for unit weights and to Figure 2 for approximate center of gravity CLEARANCE...

Page 4: ...it to an open drain An alternate drain connection one inch NPT female coupling is provided inboard on the same centerline as the exterior location NOTE The condensate drain line MUST be trapped to pro vide proper drainage See Figure 4 COMPRESSORS Units are shipped with compressor mountings factory adjusted and ready for operation CAUTION Do Not loosen compressor mounting bolts FILTERS Two inch fil...

Page 5: ......

Page 6: ...halpy setpoint may now be set by selecting the desired setpoint shown in Figure 8 Adjust by carefully turning the setpoint adjusting screw to the A B C or D setting corresponding to the lettered curve 7 To check that the damper blades move smoothly without binding carefully turn the minimum position adjusting screw fully clockwise and then energize and de energize terminals R to G With terminals R...

Page 7: ...Unitary Products Group 7 530 22 N5W FIG 6 ENTHALPY SETPOINT ADJUSTMENT ...

Page 8: ...20 FACE AREA Sq Ft Each 36 0 43 3 COMPRESSOR Qty Per Unit 10 TON TANDEM 1 2 5 TON HERMETIC 1 AIR FILTERS QUANTITY PER UNIT 16 X 20 X 2 4 QUANTITY PER UNIT 16 X 25 X 2 4 QUANTITY PER UNIT 18 X 24 X 2 5 TOTAL FACE AREA sq ft 15 0 20 0 CHARGE REFRIGERANT 22 lbs oz SYSTEM NO 1 20 8 18 8 SYSTEM NO 2 10 8 18 8 This compressor will be energized first OPERATING WEIGHTS LBS 15 TON 20 TON Basic Unit Cooling...

Page 9: ...of the unit RETURN AIR OUTDOOR AIR Economizer SUPPLY AIR CONDENSER AIR DETAIL X ACCESSORY SIDE SUPPLY AND RETURN AIR OPENINGS Front 36 Back 24 Less Economizer 49 With Economizer Left Side Filter Access 24 Less Economizer 54 With Economizer Right Side Cond Coil 36 Below Unit1 20 Above Unit2 72 With 36 Maximum Horizontal Overhang For Condenser Air Discharge Outlet NOTE Unit and ductwork are approved...

Page 10: ... 4 6 1170 1 0 2 1 3 9 3 5 2 0 4 7 4 2 1 8 5 5 4 9 230 460 575 VOLT AND STANDARD DRIVE 870 6 0 1 0 2 4 2 2 0 8 3 1 2 8 0 6 3 5 3 1 0 2 4 1 3 7 915 5 0 1 1 2 6 2 4 0 9 3 3 3 0 0 7 3 7 3 3 0 3 4 4 3 9 0 2 4 5 4 0 965 4 0 1 2 2 9 2 6 1 0 3 6 3 2 0 8 4 0 3 6 0 5 4 7 4 2 0 4 5 0 4 4 980 3 5 1 3 3 0 2 7 1 1 3 7 3 3 0 9 4 1 3 7 0 6 4 8 4 3 0 5 5 1 4 6 1040 2 0 1 5 3 2 2 9 1 3 3 9 3 5 1 1 4 5 4 0 0 9 5 3 4...

Page 11: ...T AND STANDARD DRIVE 870 6 0 0 4 2 1 1 8 0 1 2 3 2 0 900 5 0 0 8 3 2 2 7 0 5 3 5 2 9 0 2 3 8 3 2 930 4 0 1 1 4 1 3 4 0 9 4 5 3 8 0 6 4 9 4 1 0 1 5 1 4 3 950 3 5 1 3 4 6 3 9 1 1 5 1 4 3 0 8 5 5 4 6 0 4 5 9 5 0 980 2 5 1 6 5 3 4 5 1 4 5 8 4 9 1 2 6 3 5 3 0 7 6 9 5 8 0 2 7 3 6 1 1015 1 5 1 9 5 9 5 0 1 7 6 5 5 5 1 5 7 0 5 9 1 0 7 7 6 5 0 6 8 2 6 9 1025 1 0 2 0 6 1 5 1 1 8 6 6 5 6 1 6 7 3 6 1 1 1 7 9 6...

Page 12: ...75 11 4 1 3 16 BX83 84 8 1 High Speed Access 950 1120 BK110 10 75 10 4 1 3 16 BX81 81 8 1 1 All motors have a nominal speed of 1800 RPM a 1 15 service factor and a solid base They can operate to the limit of their service factor because they are located in the moving air upstream of any heating device 2 Do NOT close this pulley below 1 turn open TABLE 9 BLOWER MOTOR AND DRIVE DATA EXTERNAL STATIC ...

Page 13: ... 0 40 6 54 1 1 2 2 2 37 5 75 1 112 6 150 1 77 0 11 8 158 7 168 1 90 125 175 200 3 2 00 00 230 3 60 E018 E036 E054 E072 18 0 36 0 54 0 72 0 1 2 2 2 43 3 86 6 129 9 173 2 77 0 126 3 147 9 191 2 90 150 175 225 4 1 0 000 W180A 460 3 60 E018 E036 E054 E072 18 0 36 0 54 0 72 0 1 2 2 2 21 7 43 3 65 0 86 6 42 9 63 1 74 0 95 6 50 70 90 110 8 6 4 3 X180A 575 3 60 E018 E036 E054 E072 18 0 36 0 54 0 72 0 1 2 ...

Page 14: ...t is set in the ON position ECONOMIZER WITH POWER EXHAUST This system operates as specified above with one addition The power exhaust motor is energized whenever the economizer is chosen by the enthalpy sensor for first stage cooling Y1 As always the R to G connection provides minimum position but does not provide power exhaust operation MOTORIZED OUTDOOR AIR DAMPERS This system operation is the s...

Page 15: ...n the equipment installer To check the supply air CFM after the initial balancing has been completed 1 Remove the two 5 16 inch dot plugs from the blower motor and the filter access panels shown in Figure 9 2 Insert at least 8 inches of 1 4 inch tubing into each of these holes for sufficient penetration into the air flow on both sides of the indoor coil NOTE The tubes must be inserted and held in ...

Page 16: ...n grease fitting Using a low pressure grease gun pump grease Chevron SRI 2 or equivalent into the bearing cavity until new grease shows at the open port Do not over lubricate Run the motor for ten minutes until excess grease is purged from the cavity Replace the plugs On 20 ton only units are supplied with blower shaft bearings that do not require maintenance but may be relubricated if desired Eve...

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