Unico M Series Installation Manual

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INSTALLATION MANUAL

FOR 'M' SERIES

AIR HANDLER UNITS

BULLETIN 30-020

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Summary of Contents for Unico M Series

Page 1 INSTALLATION MANUAL FOR ‘M’ SERIES AIR HANDLER UNITS BULLETIN 30-020...
Page 3: Table Of Contents
PIPING ..............................17 WIRING ............................... 21 CHECKING AIR FLOW ........................21 CHARGING THE SYSTEM ........................23 MAINTENANCE (1218, 2430, 3036, 3642, 4860) ................26 Certified to UL Standard 1995 Conforms to CAN/CSA Standard C22.2 NO. Copyright © 2019 Unico Inc. Page...
Page 4: Introduction
The cooling module includes a cooling-only refrigerant The Unico System is a complete indoor comfort system coil, a heat pump coil, or a chilled water coil. The that includes an indoor air handling unit and small duct heating module is supplied as an empty cabinet with system.
Page 5: Part Numbers
These include an electric duct heater, multiple return plenum, and a vertical plenum stand. Please refer to the latest Unico Catalog for information on these and other options. Unpacking. All modules are inspected prior to shipping and are carefully packaged in individual cartons.
Page 6 + Cooling Coil + Hot Water Coil + Cooling Coil Horizontal Flow Vertical Up-Flow Vertical The M1218 is not meant for Vertical Down-Flow applications. Down-Flow IL00148.CV5 Figure 2b. Basic Module Arrangement for 1218 Copyright © 2019 Unico Inc. Page 6...
Page 7 The opening for the return air box is listed in Table 1. If the joists or studs are less than 16-inches (406-mm) center-to-center or running the wrong direction it will be necessary to cut and header the joists. Figure 3. Typical Horizontal Attic Installation Copyright © 2019 Unico Inc. Page...
Page 8: Ec Motor Temperature Limits
Normal temperature limit. For maximum motor life, screwdriver to pry the gap apart. Secure the modules we recommend that the Unico EC motor be limited to together with the latches, compressing the gasket applications with less than 130°F (54°C) air further.
Page 11 (4) sheet metal screws as over. shown in Figure 12. Connect the wiring as required in the wiring section and Bulletin 30-039 for the SCB control box and Bulletin 30-037 for the ST control box. Copyright © 2019 Unico Inc. Page 11...
Page 13: Mounting
It should be mounted on Table 4. Horizontal Distance of Drain Piping for either a platform or a floor. Unico makes a module Different Framing Materials specifically for vertical installations (refer to previous...
Page 14: Module Combination
Secure the bottom mounting rail to the unit with at least three (3) #10-32 sheet metal screws a minimum of ¾ inches (19 mm) long. IL00171.CV5 Figure 14c. Screw Hole Pattern of Mounting Copyright © 2019 Unico Inc. Page 14...
Page 15: Duct Connections
Restrictor Plate (ST). The single speed (non-ECM) blower includes a restrictor plate to fine-tune the airflow. The purpose of the restrictor plate is to eliminate objectionable outlet noise because the blower is delivering more air than required. In some Copyright © 2019 Unico Inc. Page 15...
Page 16 Attach the proper return duct adapter to The Unico Return Duct system has a single return that either the Heating or Cooling Module. Then attach the includes the return air box with filter, the return duct, return duct to the adapter and to the return air box and the return air adapter (refer to Fig.
Page 17: Piping
Multiple Returns. If more than one return is desired, The standard trap that ships with the cooling coil Unico has designed a return plenum (MR) module. includes a float switch to shut off the system if the The MR module is available in three sizes: 2430, 3036, drain is plugged up.
Page 18 Always use new Teflon seals (part no. A00809-001) when connecting the threaded fittings. Table 7 below lists the compatible valves for each coil. Figure 21. Cut end of connection as shown. Copyright © 2019 Unico Inc. Page 18...
Page 19 Figure 24. On iSERIES, connect liquid line directly to the distributor (Figure 27). Figure 26. External equalizer line and themostatic bulb line location routing Copyright © 2019 Unico Inc. Page 19...
Page 20 150 psig of dry nitrogen and check for leaks The best method is to use a glycol-water antifreeze at all connections. solution with a freezing point below the coldest temperature expected. Copyright © 2019 Unico Inc. Page 20...
Page 21: Wiring
UL Standard 1995 and CAN/CSA-C22.2 No. 236 and are listed by ETL. All 50 Hz units are CE marked and conform to the Low Voltage 73/23/EEC and EMC 89/336/EEC Directives. Copyright © 2019 Unico Inc. Page 21...
Page 22 Table 4, the static pressure reading is not an effective indicator of airflow although it should still be recorded. In this case, measuring motor amperage is the only reliable indicator. Copyright © 2019 Unico Inc. Page 22...
Page 23: Charging The System
3 and 8 °F (2 to 5°C). For long refrigerant lines or when the evaporator is above the condenser, the sub-cooling should be close to 8°F; otherwise, aim for the low end of the range. Copyright © 2019 Unico Inc. Page 23...
Page 24 85 and 105°F (29 to 40°C), 3. Determine the sub-cooling with the following superheat should be approximately 8 to 10°F (4 to equation: 5°C). Saturated Temperature — Liquid Line Temperature = Subcooling Copyright © 2019 Unico Inc. Page 24...
Page 25 The Unico System will show a lower suction pressure during the cooling mode than a conventional system. Generally, it will be 10 to 15 psi (70 to 100 kPa) less.
Page 26: Maintenance (1218, 2430, 3036, 3642, 4860)
Bulletin 30-020.007 To re-install the motorized blower assembly back into Using a Low Ambient Control Kit. Since the Unico the blower housing, follow the steps mentioned above System operates at colder coil temperatures (in cooling in reverse order. It is not necessary to access both mode), an anti-frost switch is installed on the coil to sides of the unit to remove motor.
Page 27 Do not force in a coil if it is stuck. Forcing the coil into the cabinet could cause damage to the coil or cabinet. Figure 36. Removal of M1218 Cooling Coil Copyright © 2019 Unico Inc. Page 27...

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M1218 M2430 M3036 M3642 M4860

Unico M Series Installation Manual

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