Trane Foundation BAYENTH321 Series User manual

3
1
2
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.
© 2020
Model Number: Used With:
BAYENTH321* E/GBC036-060
Warnings, Cautions, and Notices
Read this manual thoroughly before operating or servicing this unit.
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 Indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury. It could also be used to alert
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 such as HCFCs and HFCs.
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
Proper Field Wiring and Grounding Required!
Failure to follow code could result in death or serious injury. All field wiring
MUST be performed by qualified personnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards,
you MUST follow requirements for field wiring installation and grounding as
described in NEC and your local/state electrical codes.
WARNING
Personal Protective Equipment Required!
Installing/servicing this unit could result in exposure to electrical, mechanical
and chemical hazards. Before installing/servicing this unit, technicians MUST
put on all Personal Protective Equipment (PPE) recommended for the work
being undertaken. ALWAYS refer to appropriate SDS sheets and OSHA
guidelines for proper PPE. When working with or around hazardous chemicals,
ALWAYS refer to the appropriate SDS sheets and OSHA guidelines for
information on allowable personal exposure levels, proper respiratory
protection and handling recommendations. If there is a risk of arc or flash,
technicians MUST put on all necessary Personal Protective Equipment (PPE) in
accordance with NFPA70E for arc/flash protection PRIOR to servicing the unit.
Failure to follow recommendations could result in death or serious injury.
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.
General Information
Inspection
1. Unpack all components of the BAYENTH321* kit.
2. Check carefully for any shipping damage. If any damage is found it
must be reported immediately and a claim made against the
transportation company.
Parts List
• 2 Sensor; Humidity
• 1 Harness; Wire - Outdoor humidity Sensor
• 1 Harness; Wire - RA humidity Sensor
• 1 Harness; Wire - RAT Sensor
• 1 Thermistor, -40 to 65°C
• 1 Grommet
• 2 Bush
• 3 Ties; Wire
• 1 'Installed Accessory' Label
• 4 Screw; 6-32 X 0.75 THD ROLL
Installation Procedure
Outdoor Humidity Sensor installation
1. Remove Horizontal return duct cover.
2. Connect wire 123A (RD) to the positive terminal on the humidity
sensor. Connect wire 124A (BL) to the remaining terminal on the
humidity sensor.
3. Insert bush and grommet in the hole on the plate.
4. Attach OAH sensor to the plate using two screws. See Figure 1.
5. Insert OAT sensor in the grommet keeping half an inch out on the
other side of the plate. See Figure 1.
6. Attach plate assembly to economizer panel using one screw. See
Figure 1.
7. Route sensor wires through star bushing.
8. Attach plug to OAH pin on RTEM-EM as shown in Figure 2.
April 2020 ACC-SVN202B-EN
Installation Instructions
Comparative Enthalpy -
Standard Economizer
Foundation™ Packaged
Rooftop Units
3 - 5 Tons

4 5
©2020
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.
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.
9. Secure wires with wire tie.
Figure 1. Attach plate assembly to economizer
OAT sensor
OAH sensor
Grommet
Plate
Bushing
Return Air Humidity Sensor and Return Air Temperature
Sensor Installation
1. Connect wire 129A (RD) to the positive terminal on the humidity
sensor. Connect wire 130A (BL) to the remaining terminal on the
humidity sensor.
2. Install Return Air Humidity Sensor and secure with 2 screws. Refer to
Figure 2.
3. Route Return Air Humidity Sensor through opening in the damper
blade.
4. Attach plug to RAH pin on RTEM-EM as shown in Figure 2.
5. Insert RAT sensor through the serrations in the damper blade keeping
half an inch out on the other side of the plate. Refer to Figure 2.
6. Attach plug to RAT pin on RTEM-EM as shown in Figure 2.
7. Secure wiring harnesses with wire ties.
8. Reinstall horizontal return duct cover.
Figure 2. Connections
RAT Sensor
RAH Sensor
WIRE 130A (BL)
WIRE 129A (RD)
WIRE 124A (BL)
WIRE 123A (RD)
DCV
RAH/RAE
RAT
OAT
OAH
MAT
EXF
ACC-SVN202B-EN 22 Apr 2020
Supersedes ACC-SVN202A-EN (Dec 2016)