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TABLE OF CONTENTS
Section Title Page
I. Introduction to ECONAR Heat Pumps . . . . . . . . . . . . . . . . . . . . . 2
II. Unit Location/Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
III. Duct System/Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
IV. Earth Loop Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
A. Closed Loop Applications
B. Open Loop Applications
1) Open Loop Freeze Protection Switch
2) Water Coil Maintenance
a. Freeze Cleaning
b. Chlorine Cleaning
c. Miratic Acid Cleaning
V. Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
VI. Unit Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
A. Earth Loop Configuration and Design Water Temperatures
B. Building Heat Loss/Heat Gain
VII. Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
VIII. 24 Volt Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
A. Transformer
B. Thermostat
C. Controller
1) Blower Operation
2) Earth Loop Pump Initiation
3) Compressor Operation
4) 4-Way Valve Control
5) Compressor Lockouts
6) Compressor Anti-Short-Cycle
7) System Diagnostics
8) Overflow Detection
IX. Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
X. Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. Filter
B. Lockout Lights
C. Preseason Inspection
XI. Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
XII. Troubleshooting Guide For Unit Operation . . . . . . . . . . . . . . . . . 13
XIII. Troubleshooting Guide For Lockout Conditions . . . . . . . . . . . . . 15
XIV. Additional Figures and Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
XV. Desuperheater (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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