Table of Contents
Advertisement
Quick Links
Rooftop (ERE)
Series
Commercial Rooftop
Water-Source Heat
Pumps
Installation,
Operation
& Maintenance
97B0075N23
Revised: February 28, 2023
Table of Contents
3
4
5
6
7
8
9
10
11
12
13
14
18
19
21
22
23
24
25
26
27
29
31
32
33
34
35
36
37
38
39
40
44
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Enertech ERE Series
Summary of Contents for Enertech ERE Series
-
Page 1: Table Of Contents
Electrical – Thermostat Wiring Electrical Data ERE Electrical Data – Reheat Installation, Wire Diagram Matrix ERE Series Nomenclature – Reheat Option Operation Reheat – Benefits and Applications Reheat – Sequence of Operation & Maintenance ERE Blower Performance Data - Units with Reheat... - Page 2 ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 This Page Intentionally Left Blank E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s...
-
Page 3: Model Nomenclature
Model Type Seismic/Wind Rated A = Standard ACURB = Curb S = Seismic/Wind Rated (non-calculated) Series Type RT = ERE Series Horizontal Curb Adapter A = No Adapter Revision Level B = Horizontal Adapter H = Current Revision C = Horiz. Adapter w/14" Knockdown D = Horiz. -
Page 4: General Information
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 General Information Inspection - Upon receipt of shipment at the job site, 5. -
Page 5: Ere036-072 Dimensional Data
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE036-072 Dimensional Data... -
Page 6: Ere096-144 Dimensional Data
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE096-144 Dimensional Data E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s... -
Page 7: Ere168-240 Dimensional Data
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE168-240 Dimensional Data... -
Page 8: Standard Roof Curb
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Standard Roof Curb Model ERE036/48/60/72 72.25” 18” 35.25” 72.25” 35.25” 14” or 24”... -
Page 9: Standard Curb With Vibration Isolation
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Standard Curb with Vibration Isolation Model ERE036/48/60/72 72.25” 18” 35.25” 72.25” 35.25” 14” or 24” ERE096/120/144 82.25” 21”... -
Page 10: Side Discharge Supply & Return Roof Curb
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Side Discharge Supply & Return Roof Curb Model ERE036/48/60/72 72.25” 18” 35.25”... -
Page 11: Side Discharge Supply & Return Isolation Curb
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Side Discharge Supply & Return Isolation Curb Model ERE036/48/60/72 72.25” 18” 35.25” ERE096/120/144 82.25” 21” 41.25” ERE168/240 82.25”... -
Page 12: Installation
Only P.O.E. oil that has been verified as moisture free can be added to the system. Consult factory for more Note: Refer to previous pages for actual unit dimensions. information. Figure 1: ERE Curb Installation ERE Series Unit Flashing Roof Gasket... -
Page 13: Piping Installation
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Piping Installation ⚠ ⚠ Condensate Piping - Install a condensate trap at each WARNING! unit with the top of the trap positioned below the unit condensate drain connection. -
Page 14: Water Quality Standards
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Water Quality Standards Table 1: Water Quality Standards Clean water is essential to the performance and life span of water source heat pumps. Contaminants, chemicals, and minerals all have the potential to cause damage to the water heat heat exchanger if not treated properly. - Page 15 Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Water Quality Standards, Cont’d. 1. The Water Quality Table provides water quality α Hydrogen Sulfide has an odor of rotten eggs. If one requirements for coaxial &...
- Page 16 ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Water Quality Standards, Cont’d. Measuring Earth Ground Resistance � 0.02 Well Casing...
- Page 17 Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Water Quality Standards, Cont’d. Measuring Electrolysis Voltage and Current 300mV Heat Pump Volt Meter Wire Electrode inserted into port for Voltage measurement Pete's Port Water-in...
-
Page 18: Electrical Wiring
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Electrical Wiring ⚠ ⚠ ⚠ ⚠ WARNING! CAUTION! WARNING! Disconnect electrical power source to prevent CAUTION! Maintain zone integrity to assure accurate and injury or death from electrical shock. -
Page 19: Electrical - Low Voltage Wiring
N.O. Fan Enable Fan Speed Rooftop (ERE) Series Test R e v . : F e b r u a r y 2 8 , 2 0 2 3 Electrical – Low Voltage Wiring Micro Alarm Thermostat Connections - The thermostat will be wired Figure 3: LT1 Limit Setting Relay to the DXM2.5 board located within the unit control box. - Page 20 ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Electrical – Low Voltage Wiring, Cont’d. Accessory Relay 1 Configuration Figure 4: Accessory Wiring P2 Terminal Strip DIP 2.1...
-
Page 21: Electrical - Low Voltage Wiring For External Motorized Water Valve
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Electrical – Low Voltage Wiring for External Motorized Water Valve Figure 5: Valve Wiring Figure 6: Typical Valve Wiring DXM2.5 Typical Valve... -
Page 22: Electrical - Thermostat Wiring
Comm - ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series Outdoor Sensor (Optional) R e v . : F e b r u a r y 2 8 , 2 0 2 3 Remote Indoor Sensor (Optional) Electrical – Thermostat Wiring... -
Page 23: Electrical Data
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Electrical Data Table 3:ERE Electrical Data Total Compressor Blower Motor SCCR kA SCCR Voltage Min/Max Blower FLA/ Max Fuse/ Model # Voltage... -
Page 24: Ere Electrical Data - Reheat
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE Electrical Data – Reheat Compressor Blower Motor Pump Total SCCR kA... -
Page 25: Wire Diagram Matrix
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE Series Wiring Diagram Matrix Sizes Unit Controller Reheat 036-072 096-240 CXM2 None 96B0281N03 96B0281N04 None 96B0281N07 96B0281N05 DXM2.5... -
Page 26: Ere Series Nomenclature - Reheat Option
WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE Series Nomenclature – Reheat Option 1 2 3 4 5 6 E R E 0 3 6... -
Page 27: Reheat - Benefits And Applications
(see figure 1, below). the reheat mode. Our reheat refrigerant circuit is like every other Enertech unit (without reheat), so everything the Benefits - Our Reheat is like no other reheat option on technician already knows applies to troubleshooting the the market. - Page 28 Reheat – Benefits and Applications, Cont’d. With the Reheat option, return air from the space is Most Enertech heat pumps have a sensible-to-total (S/T) cooled by the air-to-refrigerant (evaporator) coil, and then ratio of 0.72 to 0.82. Therefore, approximately, 25% of...
-
Page 29: Reheat - Sequence Of Operation
- 1st Stage Cooling and heating. The cooling/heating modes are like any - 2nd Stage Cooling other Enertech WSHP. The reversing valve (“O” signal) - 1st Stage Heating is energized in cooling, along with the compressor - 2nd Stage Heating contactor(s) and blower relay. - Page 30 ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Reheat – Sequence of Operation, Cont’d. • 1st Stage Heating: A simultaneous call from (G) and (Y1) to the (G) and (Y1) terminals of the DXM2.5...
-
Page 31: Ere Blower Performance Data - Units With Reheat
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 ERE Blower Performance Data - Units with Reheat ERE with Reheat - ESP Loss Coil Face Velocity ERE036 &... -
Page 32: Flushing/Purging Units With Reheat
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Flushing/Purging Units with Reheat When flushing/purging units equipped with Reheat the De-energize the valve by removing the red wire from the unit should be fully flushed/purged before attempting ACC1 ‘NC’... -
Page 33: Unit Commissioning & Operating Conditions
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Unit Commissioning & Operating Conditions Operating Limits - Environment - Units are designed for Commissioning Conditions - Consult Table 4b. roof mount or indoor installation. -
Page 34: Start-Up Procedure
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Start-Up Procedure ⚠ ⚠ 10. Add antifreeze to the system in climates where... -
Page 35: Blower Adjustment
3. Turn counter clock wise to tighten or clock wise to Selection Adjustment loosen the belt. The ERE Series is available with standard, low, and high static options. These options will substitute a different 4. The belt should be tensioned using a tension gauge blower drive sheave for each static range. -
Page 36: Tensioning V-Belt Drives
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Tensioning V-Belt Drives General Rules of Tensioning DEFLECTION = 1. Ideal tension is the lowest tension at which the belt will BELT SPAN not slip under peak load conditions. -
Page 37: Unit System Checkout
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Unit System Checkout Voltage: Ensure that voltage is within the utilization Air Dampers: Assure that all air dampers are range specifications of the unit compressor and fan properly set. -
Page 38: Unit Start-Up
ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Unit Start-Up 3. Operate each heat pump in the heating cycle 5. If a unit fails to operate, conduct the following checks: immediately after checking cooling cycle operation. -
Page 39: Start-Up Sheet Log
Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 Start-Up Sheet Log Installer: Complete unit and system checkout and follow unit start-up procedures in the IOM. Use this form to record unit information, temperatures and pressures during start-up. -
Page 40: Preventive Maintenance
R e v . : F e b r u a r y 2 8 , 2 0 2 3 Preventive Maintenance Maintenance Procedures: Perform the maintenance Fan Motors: Lubricate fan motors annually. All Enertech Rooftop Units are fully lubricated at the factory. Do not oil procedures outlined below periodically as indicated. - Page 41 Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 NOTES:...
- Page 42 ENERTECH ® WATER-SOURCE HEAT PUMPS Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 NOTES: E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s...
- Page 43 Rooftop (ERE) Series R e v . : F e b r u a r y 2 8 , 2 0 2 3 NOTES:...
-
Page 44: Revision History
Greenville, IL 62246 Enertech works continually to improve its products. As a result, the design and specifications of each product at the time for order may be changed without notice and may not be as described herein. Please contact Enertech Technical Service Department at 1-618-664-5860 for specific information on the current design and specifications.
Need help?
Do you have a question about the ERE Series and is the answer not in the manual?
Questions and answers