BE5V Installation Instructions
Table Of Contents
- BE5V Unit Dimensions – Upflow – Inches (mm)
- Shipping and Packing List
- General
- Requirements
- Installation Clearances
- Installation
- Condensate Drain
- Duct System and Filters
- Brazing Refrigerant Lines
- Sealing the Unit
- Electrical Connections
- BDC3 Blower Control
- Adjusting the Blower Speed
- Blower Performance
- Check-out Procedures
- Maintenance
- Repairing or Replacing Cabinet Insulation
- Professional Maintenance
- Use of Air Handler During Construction
507789-01B Issue 1818 Page 19 of 24
Operating Sequence System Demand System Response
System
Condition
Step
Thermostat Demand Relative Humidity
Comp
Air Handler
CFM
(COOL)
Comments
Y1 Y2 O G W1 W2 Status D
NO CALL FOR DEHUMIDIFICATION
Normal
Operation - Y1
1 On On On Accetpable
24
VAC
Low 70%
Compressor and indoor
air handler follow
thermostat demand
Normal
Operation - Y2
2 On On On On Accetpable
24
VAC
High 100%
Room Thermostat Calls for First-Stage Cooling
BASIC MODE (only active on a Y1 thermostat demand)
Normal
Operation
1 On On On Accetpable
24
VAC
Low 70%
Thermostat energizes
Y2 and de-energizes
D on a call for
dehumidication
Dehumidication
Call
2 On On On On Demand
24
VAC
High 60/65/70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal
Operation
1 On On On Acceptable
24
VAC
Low 70%
Dehumidication mode
begins when humidity is
greater than setpoint
Dehumidication
Call
2 On On On On Demand
0
VAC
High 60/65/70%*
Dehumidication
Call Only
1 On On On On Demand
0
VAC
High 60/65/70%*
Thermostat will try to
maintain room humidity
setpoint by allowing
the room space to
maintain a cooler room
thermostat setpoint**
Room Thermostat Calls for First- and Second-Stage Cooling
BASIC MODE (only active on a Y1 thermostat demand)
Normal
Operation
1 On On On On Accetpable
24
VAC
High 100%
Thermostat energizes
Y2 and de-energizes
D on a call for
dehumidication
Dehumidication
Call
2 On On On On Demand
0
VAC
High 60/65/70%*
PRECISION MODE (operates independent of a Y1 thermostat demand)
Normal
Operation
1 On On On On Accetpable
24
VAC
High 100%
Dehumidication mode
begins when humidity is
greater than setpoint
Dehumidication
Call
2 On On On On Demand
0
VAC
High 60/65/70%*
Dehumidication
Call Only
1 On On On On Demand
0
VAC
High 60/65/70%*
Thermostat will try to
maintain room humidity
setpoint by allowing
the room space to
maintain a cooler room
thermostat setpoint**
Jumpers at indoor unit with a two-stage outdoor unit
With Condensing unit - Y2 and R to O
With Heat Pump - none
* During dehumidication, cooling air handler speed is as follows: 70% of COOL cfm for 024, 030; 65% for 036; 60% for 042, 048 and
060 units.
** Thermostat will maintain the room temperature up to 2°F (1.2°C) cooler than the room thermostat setting in precision mode.
Table 4. BE5V Thermostat and Two-Stage Outdoor Unit Operating Sequence