1. Manuals
  2. Brands
  3. Unico Manuals
  4. Air Handlers
  5. M Series
  6. Installation manual

Unico M Series Installation Manual

Modular air handler units
Hide thumbs Also See for M Series:
Table of Contents

Advertisement

Quick Links

GENERAL
The information on the following pages is to help the
installer save time, provide the best possible installation
and ensure continuous trouble-free operation.
SCOPE
These instructions apply to the Unico "M" Series mod-
ular air handler units. For heat pumps, refer to Bulletin
30-24 for additional instructions. Installation instructions
for the air distribution system are covered in Bulletin 30-
05. Before beginning any installation a detailed system
layout must be done in accordance with the System Siz-
ing and Layout Procedure, Bulletin 40-40 and the Com-
ponent Layout Instructions, Bulletin 40-30.
NOTICE TO INSTALLER AND EQUIPMENT
OWNER: RETAIN THIS MANUAL AT THE JOB.
FULL BUILDING INSULATION IS ESSENTIAL
FOR THE MOST ECONOMICAL OPERATION
GENERAL PRECAUTIONS AND SAFETY TIPS
Do not attempt to install or startup unit without first
reading and understanding the appropriate sections in
this manual.
Before operating, be sure the unit is properly grounded.
Installation should be in accordance with all local codes
and regulations and with the National Board of Fire Un-
derwriters regulations. In case of conflict, local codes
take precedence.
All electrical wiring should be in accordance with the
latest edition of the National Electrical Code and all lo-
cal codes and regulations. The unit is safety certified to
UL 1995 and listed with ETL.
Always install a secondary drain pan when an overflow
of condensate could cause damage.
PART NUMBERS
This manual does not always include the latest revision
letter when referring to UPC part numbers. Refer to the
latest Price List and Spec Sheets for the current UPC
revision letter. For example, in UPC-00x the 'x' indi-
cates the latest revision.

TABLE OF CONTENTS

INTRODUCTION ................................................................... 1
IL00004a.CVN
OPTIONS ............................................................................. 2
UNPACKING ......................................................................... 2
LOCATION ............................................................................ 3
UNIT ASSEMBLY .................................................................. 4
MOUNTING ........................................................................... 8
DUCT CONNECTIONS ........................................................ 9
PIPING ................................................................................ 10
WIRING ............................................................................... 13
STARTUP ............................................................................ 21
R-410A Refrigerant ............................................................. 24
Maintenance ....................................................................... 25
Module Configuration Illustrations ........................................ 26
The Unico System is a complete indoor comfort system
that includes an indoor air handling unit and small duct
system. The air handler and duct system were designed
to operate together to provide the proper airflow in every
installation. The conditioned air is supplied through a
series of 2-inch ducts as a stream of air that entrains and
mixes the room air. This process of aspiration produces a
more even temperature distribution in the room.
The Unico 'M' Modular Series air-handling units consist
of various modules that are easily latched together. The
modules can be arranged in a vertical-up-flow, vertical-
counter-flow and horizontal-flow configuration. They
can be combined as a heating-only, cooling-only, or
heating and cooling air handler unit. See Fig. 1.
All insulated Unico System modules feature closed-cell
insulation for improved sound attenuation. There is no
exposed fiberglass insulation.
Bulletin 30-20 / Dec. 2010
INSTALLATION MANUAL
FOR
'M' SERIES MODULAR
AIR HANDLER UNITS
Anti-Frost Switch Wires .................................................. 4
Fastening Modules Together .......................................... 4
EC Motor Temperature Operating Limits ......................... 4
Horizontal Installation ..................................................... 4
Vertical Installation ......................................................... 5
Control Box ..................................................................... 7
Secondary Drain Pan ..................................................... 7
Horizontal Platform Mounting ......................................... 8
Horizontal Suspended Mounting ..................................... 8
Vertical ........................................................................... 8
Supply Plenum ............................................................. 10
Return Duct .................................................................. 10
Multiple Returns ............................................................ 10
Condensate Lines ........................................................ 10
Refrigerant Lines .......................................................... 11
Water Connections ....................................................... 13
Coil Cleaning ................................................................ 13
Ventilation Speed Mode ............................................... 14
Sequence of Operation ................................................. 21
Checking Airflow ........................................................... 21
Charging the System .................................................... 23
Low Ambient Control Kit ............................................... 24

INTRODUCTION

© Copyright 2010 Unico, Inc.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the M Series and is the answer not in the manual?

Questions and answers

Related Manuals for Unico M Series

Summary of Contents for Unico M Series

  • Page 1: Table Of Contents

    Vertical Installation ............5 SCOPE Control Box ..............7 Secondary Drain Pan ............. 7 These instructions apply to the Unico “M” Series mod- MOUNTING ................8 Horizontal Platform Mounting ......... 8 ular air handler units. For heat pumps, refer to Bulletin Horizontal Suspended Mounting ........

  • Page 2: Options

    There are three basic modules: a blower module, a cool- a vertical plenum stand. Please refer to the latest Unico ing module, and a heating module. The blower module Catalog for information on these and other options.
  • Page 3 Isolation Typical 10 foot (3.6 m) Return Duct Band Pads Use at least one 90° bend. Secondary Drain Pan (UPC 20 or 24) Platform Return Air Box (UPC-01-xxxx-1) IL00039c.CVS Figure 3. Typical Horizontal Attic Installation © Copyright 2010, Unico, Inc.

  • Page 4: Unit Assembly

    IL00009.CVS Figure 4. Module Flange Connection EC Motor Temperature Limits The Unico EC motor includes an electronic circuit board that is sensitive to overheating if the air temperatures surrounding the motor are above a certain value. The motor will not function above its maximum operating...

  • Page 5: Vertical Installation

    The 4860 cooling only has one return opening for either horizontal or vertical applications. The 4860 drain pan is ‘L’ shaped and will work properly when the module is turned 90 degrees. Follow the following steps for vertical installations of cooling-only or heating-and-cooling systems: © Copyright 2010, Unico, Inc.
  • Page 6 STEP 3. Place cooling module on top of vertical module. Install latches and keepers as shown to secure the cooling module. NOTE: Attach insulation gasket tape along the top opening of Cooling Module to en- sure air-tight fit. © Copyright 2010, Unico, Inc.

  • Page 7: Control Box

    (1016 x 1372) hole. Then simply connect the plug on the motor wiring harness. (For additional information see section on wir- † NOTE — The drain fitting extends 7/8 inch (22 mm) beyond this dimension. ing.) © Copyright 2010, Unico, Inc.

  • Page 8: Mounting

    It should be mounted on either condensate drain lines — at least ¼ inch drop per lineal a platform or a floor. Unico makes a module specifically foot (20 mm per meter). The platform can be built from for vertical installations (refer to previous section).

  • Page 9: Duct Connections

    Bulletin 30-20 — Page 9 DUCT CONNECTIONS Blower Module Supply Plenum Unico has a complete line of round and square plenum Restrictor Plate adapters available as shown in figures 10 and 11. In addition, all blowers include a restrictor plate to be in- stalled between the supply adapter and the unit.

  • Page 10: Return Duct

    Multiple Returns mum length should be 7-feet (2 m). When given a If more than one return is desired, Unico has designed a choice, the shorter distances should be avoided as this return plenum (MR) module. The MR module is availa- may increase sound transmission from the unit.

  • Page 11: Refrigerant Lines

    Table 6. Always use new Teflon seals change. If pressure is present, then go ahead and relieve when replacing the TXV (Unico Part No. A00809-001). the pressure in the coil be continuing to press on the de- pressor.
  • Page 12 (14 to 17 Heat Pump Coils 2 to 2.5-ton A00808- A00808- MC2430H (7 to 9 kW) 3 to 3.5 ton A00808- A00808- MC3642H (10 to 12 4 to 5 ton A00808- A00808- MC4860H (14 to 17 © Copyright 2010, Unico, Inc.

  • Page 13: Water Connections

    Control BoxMo- Ventilation Wiring Availability del No. Control Diagram Standard A00175-G02 Fig. 20 BLEED VALVE (U.S., Canada) IL00054b.CVN (DRAIN) Special Order (b) Chilled Water Coil A00175-G03 Fig. 21 (Europe) Figure 16. Water Coil Connections © Copyright 2010, Unico, Inc.

  • Page 14: Ventilation Speed Mode

    Ventilation Speed Mode from electrical shock. The Unico System is factory configured to energize the The low voltage transformer is factory set for a pri- fan at full speed whenever there is a call for heat or cool, mary voltage of 230V.
  • Page 15 Bulletin 30-20 — Page 15 Figure 20. M Series Electrical Wiring Diagram (with Motor Controller installed) for A00175-G02 Control Box © Copyright 2010, Unico, Inc.
  • Page 16 4. ANTI-FROST CONTROL IS USED ONLY WITH REFRIGERANT COOLING MODULES FIELD (NEC) CLASS 1 (MODELS MC2436C,H AND MC4260C,H). FIELD ATTACH LEADS TO TERMINALS AS SHOWN. FIELD (NEC) CLASS 2 Figure 21. M Series Electrical Wiring Diagram(without Motor Controller installed) for A00175-G03 Control Box © Copyright 2010, Unico, Inc.
  • Page 17 Bulletin 30-20 — Page 17 Figure 22. Wiring Schematic for Cooling-Only or Heat-Pump without Supplemental Heat (Modified to control ventilation speed mode at thermostat) © Copyright 2010, Unico, Inc.
  • Page 18 Bulletin 30-20 — Page 18 Figure 23. Wiring schematic Refrigerant Cooling with Hot Water Heat (Modified to control ventilation speed at thermostat) © Copyright 2010, Unico, Inc.
  • Page 19 Bulletin 30-20 — Page 19 Figure 24. Wiring schematic Heat-Pump with Supplemental Electric Duct Heater (second stage) (Modified to control ventilation speed at thermostat) © Copyright 2010, Unico, Inc.
  • Page 20 Bulletin 30-20 — Page 20 Figure 25. Wiring schematic Heat-Pump with Supplemental Hot Water Heat (second stage) (Modified to control ventilation speed at thermostat) © Copyright 2010, Unico, Inc.

  • Page 21: Startup

    The most important step when installing the “W2” contacts and energizes the sequencer for elec- the Unico System is making sure it has tric heat (if installed). When the second stage thermostat the correct airflow. Be sure to record the is satisfied, the “W2”...
  • Page 22 High Static, Restrictive duct system. Add outlets, add splitter vane in tee, reduce the num- Low Amperage ber of tees and elbows in plenum, increase plenum size to 9” equivalent, or Open restrictor to proper amperage. © Copyright 2010, Unico, Inc.

  • Page 23: Charging The System

    3 and 8 °F (2 to 5°C). For long refrigerant lines CHARGE INTO SUCTION PORT. 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 2010, Unico, Inc.

  • Page 24: Low Ambient Control Kit

    INTO THE ATMOSPHERE. The Unico System will show a lower suction pressure In some cases, such as in a hot attic, the liquid line will during the cooling mode than a conventional system.

  • Page 25: Maintenance

    R-22 equipment. (English units) ture (SI units) The Unico System is completely compatible with R- psig kPa (gauge) 410A. Using R-410A with the Unico System is a simple °F R-22 R-410A °C R-22 R-410A matter of changing the expansion valve.

  • Page 26: Module Configuration Illustrations

    Bulletin 30-20 — Page 26 Figure 29. Horizontal Configuration Chart © Copyright 2010, Unico, Inc.
  • Page 27 Bulletin 30-20 — Page 27 Figure 30. Vertical Configuration Chart © Copyright 2010, Unico, Inc.
  • Page 28 Bulletin 30-20 — Page 28 PAGE INTENTIONALLY LEFT BLANK © Copyright 2010, Unico, Inc.

This manual is also suitable for:

1218243036424860

Table of Contents

Save PDF