Taco Electronic Solutions iWorx HPU2, Installation Manual

iWorx® HPU Series

10

502-025, Effective: April 17, 2013 

© 2013 Taco Electronic Solutions, Inc.

HPU3 Supplemental Instructions - Adding Dehumidification Control

Controlled:

 2 Stages Heating/Cooling, Reversing 

Valve, Equipment Status, Dehumidification

Sensors Required:

 Wall Mount Temp/Humidity (Taco 

Part #TS302-1 or TS304-1 ) and Supply Air Temp 

Added Module Required:

 Add LHP or an ASM with 

the Plant Enable input connected to a loop flow switch. 
If a loop flow switch is not used, the input must be 
shorted.

Setup Instructions

1.Press 

Controllers

 from main screen.

2.Select required HPU3 from controller list and press 

appropriate controller.

3.Press 

All Settings

.

4.Press 

Dehumidification

.

5.The 

Dehumidification

 menu opens.

a.Select 

Type of Dehumidification

. 

- “Occupied” - Only active in occupied periods. 
- Or “Always Enabled”

b.Select 

Humidity Setpoint

 in RH%.

c. Select 

Shutoff Offset

 in degrees F. Shutoff offset 

sets the degrees of overcooling allowed before 
dehumidification is turned off.

d.Press 

Save

.

6.Press 

Next 3

.

7.Press 

SAT Setpoints

.

8.The 

SAT Setpoints

 menu opens.

a.Select 

Supply Air Temperature Cool SetPt

 in 

degrees.

b.Select 

Supply Air Temperature Heat SetPt

 in 

degrees.

c. Press 

Save

.