TRANE BAYECON320 Foundation Packaged Rooftop Units Instruction Manual

TRANE BAYECON320 Foundation Packaged Rooftop Units

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air- conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

Introduction

Read this manual thoroughly before operating or servicing this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.
The three types of advisories are defined as follows:

WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION s Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE Indicates a situation that could result in equipment or property- damage only accidents.

Important Environmental Concerns
Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs.

Important Responsible Refrigerant Practices
Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

WARNING Personal Protective Equipment (PPE) Required!
Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

• Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS and OSHA/GHS (Global Harmonized System of Classification and Labeling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE.

WARNING Follow EHS Policies!
Failure to follow instructions below could result in death or serious injury.

• All Trane personnel must follow the company’s Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies.
• Non-Trane personnel should always follow local regulations.

Copyright
This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.

Revision History
Actuator updates in Installation chapter.

General Information

Inspection

1. Unpack all components of the kit.
2. Check carefully for shipping damage. If any damage is found, report it immediately, and file a claim against the transportation company.
3. Visually inspect the components for shipping damage as soon as possible after delivery, before it is stored. Concealed damage must be reported within 15 days.
4. If concealed damage is discovered, stop unpacking the shipment.
5. Do not remove damaged material from the receiving location. Take photos of the damage, if possible. The owner must provide reasonable evidence that the damage did not occur after delivery.
6. Notify the carrier’s terminal of damage immediately by phone and by mail. Request an immediate joint inspection of the damage by the carrier and the consignee.
   Note: Do not attempt to repair any damaged parts until the parts are inspected by the carrier’s representative.

Parts List

Each economizer ships partially assembled. The steps for installation are illustrated throughout this guide. Refer to the figures as the steps are performed. Figure 1 illustrates the major components of the economizer when shipped for field installation. As the economizer is un-crated, locate the following parts:

Table 1. Economizer component parts list

Note: Make sure there are no missing parts before starting installation.

Field Supplied Part

NOTICE Corrosion Damage!
Use of non-recommended caulking/sealant could cause corrosion related failures to refrigeration components.

Table 2. Field supplied parts list

Note: While installing and servicing economizer, avoid manual adjustments of damper blade as much as possible. Refer to Figure 2. If only required conditions, decouple actuator and shaft connection before manual adjustments of damper blade. Confirm the coupler properly engaged after installation and service. Refer to Figure 2.

Installation

Reconfigure the Damper (Horizontal Configuration Only)
The economizer damper is shipped from the factory in downflow configuration. Follow steps below to reconfigure it for horizontal installation.

1. Remove two screws from 11. See Figure 3.
2. Remove nut and disassemble 12. See Figure 3.
3. Remove six screws from 13 (three on each side) and attach to horizontal hinge mounting brackets as shown in Figure 4.
4. Connect 8. Do not allow more than 0.25 in. (6.25 mm) of rod to protrude through ball joint at 14.
5. Tape areas shown in Figure 4.
   Figure 3. Economizer in downflow configuration

Install Optional Sensors
If the optional sensors for humidity and temperature monitoring are to be used (BAYENTH320 and BAYENTH321), install them now using the instructions provided in the kits.

Install Duct Block-off Plate
Install duct block off plate as shown in Figure 5 and Figure 6. Important: On downflow units, if Power Exhaust or Barometric Relief accessory kits are installed along with an economizer, do not install the duct block-off plate item 6 and 7 shown in Figure 5.

Economizer Installation

WARNING Hazardous Service Procedures!
Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury.
Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the following instructions: Unless specified otherwise, disconnect all electrical power including remote disconnect and discharge all energy storing devices such as capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components perform these tasks.

1. Remove unit end panel from the unit.
2. Apply gasket on the left hand and right hand posts as shown in Figure 8.
3.  Remove approximately 3-inch of gasket material from the bottom of each corner post to expose the holes used to attach the economizer assembly to the unit. Also make marks on LH and RH post engagement holes (through gasket) for shooting screw during economizer assembly onto unit.
4. Install block-off onto unit base rail as shown in Figure 9 using four screws.
5. Install the economizer assembly onto the unit and secure it by inserting six screws (three on each side) through the clearance holes in the economizer end panel and into the engagement holes on the LH and RH post. Refer to Figure 10.

Install the end panel onto the economizer assembly. Use four screws at the top, six screws (three on each side) along the sides, and three screws at the bottom. Refer to Figure 11 and Figure 12.

Using field supplied silicone, apply sealant around economizer hood.

Install Mixed Air Sensor

1. Install MAS sensor as shown in Figure 13 and connect wires 121A and 122A to it.
2. Make sure wires 121A and 122A are connected to MAS terminals on RTEM.

Factory Installed Economizer Set- Up
This section covers setup of economizer units that have been installed in the rooftop unit at the factory.

Downflow Configuration

1. Remove horizontal return duct cover.
2. Remove the two filters inside the economizer section and keep aside for later installation. Figure 14. RTEM-MAS
3. Remove items 2, 3, 4, 5, 8 from the economizer section as shown in Figure 15 and discard. These parts are required only for horizontal economizer configuration.
4. Remove rain block off out from inside the indoor section.
5. Pull the economizer assembly out into operating position. Using the screws provided, secure each side of the economizer assembly by inserting two screws on each side through the clearance holes in the corner post and into the engagement holes in the economizer assembly.
6. Install filters taken out in Step 2 in the bottom filter rack as shown in Figure 17.

Install the block-off angle underneath the economizer. The block off angle is designed to close the opening created between the economizer and the unit base refer Figure 18.

8. Using field supplied silicone, seal around the economizer hood. Refer to Figure 12, p. 9.
9. Reinstall horizontal return duct cover.

Horizontal Configuration

1. Follow Step 1 to Step 8 from “Downflow Configuration,” p. 10.
2. Install the horizontal block off parts 2, 3, 4 and 5 as shown in Figure 6, p. 7.
3. Apply gasket around block off as shown in Figure 19. Figure 19. Apply gasket
4. Reconfigure the damper for horizontal operation as economizer can’t be taken off from unit. See “Reconfigure the Damper (Horizontal Configuration Only),” p. 7 for instructions.
5. If optional sensors for humidity and temperature monitoring are to be used (BAYENTH320 and BAYENTH321), install them now. Use the instructions provided in the kits.
6. Remove return duct cover from the horizontal opening and install over the downflow opening.
7. Using field supplied silicone apply sealant around economizer hood as shown in Figure 12, p. 9.

Mist eliminator servicing

1. Remove screws securing end panel to the unit and the economizer and set panel aside.
2. Remove mist eliminator brackets.
3. Remove mist eliminator and clean.
4. Reinstall mist eliminator and secure with brackets.
5. Reinstall end panel and secure it to the unit and the economizer using the screws removed in Step 1.

Minimum Position Setting
To adjust the minimum position setting and check out the economizer, the power must be connected.

1. Close the unit disconnect and place the zone sensor fan selector in the fan ON position and the heat/cool selector in the OFF position. This will place the damper in the minimum ventilation position.

2. To adjust the minimum position setting for the required ventilation air, turn the potentiometer (on the ECA) clockwise to open (to increase the amount of ventilation) or counterclockwise to close (to decrease the amount of ventilation). The damper will open to this setting each time the blower circuit is energized.
   Note: When adjusting minimum position, the damper may move to the new setting in several small steps. Once the damper has remained in position for 10 to 15 seconds without movement, it can be assumed it is at the new position.

3. Replace the filter access panel.
   The damper will close when the blower circuit is de-energized.

Dry Bulb Settings
Standard economizer dry bulb changeover is field selectable to 5 outdoor temperatures. See Table 3 for potentiometer settings. The selection is made on the ECA.

Reference Enthalpy Settings
Economizer enthalpy changeover is field selectable to 5 points. See Table 3 for potentiometer settings. The selection is made on the ECA.

Table 3. Potentiometer settings

Table 4. Economizer control options

Control Option| Enable Conditions (a)| Optional Sensors Required (b)
---|---|---
Dry Bulb (standard)| See Table 3| Outdoor Air Temp. (OAT)
Reference Enthalpy| See Table 3| Outdoor Humidity (BAYENTH320*)

Comparative Enthalpy

| Outdoor Air Enthalpy 3.0 BTU/lb. less than Return Air Enthalpy| Outdoor Humidity Return Humidity Return Temperature

Trane and American Standard create comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or americanstandardair.com
Trane and American Standard have a policy of continuous product and product data improvement and reserve the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

References

• American Standard® | Air Conditioning and Heating | HVAC Systems
• Trane Heating & Air Conditioning

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