Unico M Series Installation Manual

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INSTALLATION MANUAL

FOR 'M' SERIES

AIR HANDLER UNITS

BULLETIN 30-020

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Page 1 INSTALLATION MANUAL FOR ‘M’ SERIES AIR HANDLER UNITS BULLETIN 30-020...
Page 2: Table Of Contents
CHECKING AIR FLOW ..........................17 CHARGING THE SYSTEM ........................18 MAINTENANCE ............................21 Certified to UL Standard 1995 Conforms to CAN/CSA Standard C22.2 NO. 236 Unico products comply with the European regulations that guarantee product safety. Copyright © 2018 Unico Inc. Page 2...
Page 3 Figure 1 (with details on pages 26 and 27). Heating-only systems require the The Unico System is a complete indoor comfort system blower module, the heating module, and a hot water that includes an indoor air handling unit and small duct coil.
Page 4: 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 Locate the air handler to minimize the number of plenum elbows and fittings while keeping the supply duct runs as short as possible.
Page 5: Location
If the joists or studs are less than 16-inches (406-mm) sealed, especially the return duct. center-to-center or running the wrong direction it will be necessary to cut and header the joists. Figure 3. Typical Horizontal Attic Installation Page 5 Copyright © 2018 Unico Inc.
Page 6 Recommended temperature limit. For maximum motor life, we recommend that the Unico EC motor be limited to applications with less than 130°F (54°C) air temperature. Therefore, the Unico EC motor can be used with all heat pump and electric heating applications without problem.
Page 8 Then set the cooling module on top of the base as shown in Figure 9. Use gasket tape under the cooling cabinet to prevent air leaks. Figure 10. Installing the Blower Module Copyright © 2018 Unico Inc. Page 8...
Page 9: Mounting
(4) sheet metal screws as 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. Page 9 Copyright © 2018 Unico Inc.
Page 10: Duct Connections
“J” hooks and attach eyebolts to chains. Secure angle iron to eyebolts and place secondary drain pan on top. Put isolation pads in drain pan, making sure unit sits above sides of drain pan. Copyright © 2018 Unico Inc. Page 10...
Page 11 It should be mounted on either a platform or a floor. Unico makes a module specifically for vertical installations (refer to previous section). If only a Figure 17. Supply Plenum Adapter Installation blower and heating module are being installed, fabricate a return plenum for the unit to sit upon.
Page 12 90° bend between the unit and filter box to reduce sound transmission directly from the unit. The Unico Return Duct system has a single return that includes the return air box with filter, the return duct, and the return air adapter (refer to Fig. 3). Multiple returns or extra-long returns are possible so long as the maximum pressure loss is not exceeded.
Page 13: Piping
Multiple Returns. If more than one return is desired, add a float switch or a micro switch with a paper fuse. Unico has designed a return plenum (MR) module. The MR module is available in three sizes: 2430, 3036, Refrigerant Connections. All refrigerant coils have and 3642/4860, and it includes a central filter.
Page 14 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 © 2018 Unico Inc. Page 14...
Page 15 Figure 24. Attach and tighten upper connecting nut (B/E coils) 3. Route both the external equalizer pressure tube and the thermostatic bulb tube (figure 25). Then tighten the external equalizer line to the flare connection (figure 26). Page 15 Copyright © 2018 Unico Inc.
Page 16 (not on the threads) and tighten per the an alternate to cleaning, allow approximately 50 hours torque specified in the iSeries manual. of break-in time to achieve the same results. Copyright © 2018 Unico Inc. Page 16...
Page 17: Wiring
2 gives the CFM of the outlet within an accuracy of 10%. (Multiply ‘knots’ by 0.94 to obtain compared to the outlet indicated by the amperage. A significant difference could indicate duct leakage. L/s.) Refer to Technote 113 for more information. Page 17 Copyright © 2018 Unico Inc.
Page 18: Charging The System
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. Figure 31. Measuring Plenum Static Pressure Copyright © 2018 Unico Inc. Page 18...
Page 19 85 and 105°F (29 to 40°C), insulation. superheat should be approximately 8 to 10°F (4 to 3. Determine the sub-cooling with the following 5°C). equation: Saturated Temperature — Liquid Line Temperature Subcooling Page 19 Copyright © 2018 Unico Inc.
Page 20 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 21 Bulletin 30-020.005 Using a Low Ambient Control Kit. Since the Unico System operates at colder coil When service is required to the motor or the wheel, temperatures (in cooling mode), an anti-frost switch is the entire assembly may be removed as a unit (see installed on the coil to prevent coil freeze-up.

Unico M Series Installation Manual

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