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INSTALLATION
INSTRUCTION
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SPLIT-SYSTEM HEAT PUMPS
OUTDOOR UNITS
MODEL: EF-10
208/230/460
VOLT ONLY
O
O
O
O
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035-18550-001-A-0902
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Table of Contents
Summary of Contents for Unitary products group EF-10
- Page 1 MAINTENANCE ......21 See the following page for a complete Table of Contents. MODEL: EF-10 NOTES, CAUTIONS AND WARNINGS Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING.
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Page 2: Table Of Contents
EXTENDING THE SERVICE PORTS ....13 CHARGING CURVE EF-10 (COOLING MODE) ......17 INSTALLATION . -
Page 3: Nomenclature
00 = No Heat Installed Capacity Airflow Options A = Standard Motor T = 208/230-3-60 Voltage W = 460-3-60 Installation Options A = None AA = None Special Options AC = Technicoat Generation 1 = First Generation 2nd = Second Generation Unitary Products Group... -
Page 4: General
See Form property damage. Refer to this manual for 50.15-NM for more information. assistance or additional information, consult a qualified installer or service agency. Unitary Products Group... -
Page 5: Installation
035-18550-001-A-0902 TABLE 1: PHYSICAL DATA Description Unit Model EF-10 Rating, (Tons) Compressor Quantity Fans Diameter, (In.)/No. Blades 24/3 Nominal CFM 7830 Fan Motors 1100 Face Area, (Sq. Ft.) 36.11 Rows Deep x Rows High 2 x 40 Coil Finned Length, (In.) -
Page 6: Roof-Top Locations
The units must be installed on a substantial base that the unit, MUST be used across the top of the unit if the will not settle. Any strain on the refrigerant lines may cause a refrigerant leak. Unitary Products Group... -
Page 7: Typical Rigging
All screws that are removed to take that it will lift evenly. these brackets off must be replaced on the unit. FIGURE 3 - POINT LOADS 4-POINT LOAD (lbs) UNIT TOTAL 10 Ton Unitary Products Group... -
Page 8: Clearances
Connection Connection Size FAN MOTOR ACCESS Entry 15 Ton Suction Line A 1-1/8 ID 76-7/8 Liquid Line B 5/8 ID Power Wiring C 2-1/8 KO Control Wiring D 7/8 KO FIGURE 4 - UNIT DIMENSIONS AND CLEARANCES Unitary Products Group... -
Page 9: Compressors
The field-supplied disconnect switch must be suitable for an outdoor location. Although it should be installed near the unit, do NOT secure it to the unit cabinet. Unitary Products Group... -
Page 10: Typical Field Wiring
The 208-230 V compressors and motors use a single tap for the entire range of voltages. The 208/230 V to 24 V transformers have different taps for 208 and 230 V. Dual element, time delay type. Refer to article NEC/NFPA No. 70, articles 440-11,12 for information on minimum disconnect sizing. Unitary Products Group... -
Page 11: Refrigerant Piping
Friction loss should always be based on cooling opera- refrigerant lines for a split heat pump system. Refer to tion because refrigerant flow rates will be greater dur- Figure 6. ing the cooling cycle than during the heating cycle. Unitary Products Group... -
Page 12: Service Valves
Fitting* ........0.5 psi These service valves are the back-seating type and Vapor Line Pressure Drop = 3.0 psi have a 1/4" male flare access port for evacuating and charging the system. Unitary Products Group... -
Page 13: Extending The Service Ports
Any particles left on these surfaces may lead to a future system malfunction. Use only copper tubing that has been espe- NOTE: cially cleaned and dehydrated for refrigerant use. If the tubing has been open for an Unitary Products Group... - Page 14 After the liquid and vapor lines have been installed, the nitrogen through the liquid line, the indoor coil and system should be evacuated and charged. the hole in the vapor disc. Unitary Products Group...
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Page 15: Evacuating And Charging
Figure 9. Open the liquid and vapor line service valves fully to Do not charge liquid refrigerant through the close their access ports after the system has been compressor suction connection. charged. Unitary Products Group... -
Page 16: Alternate Charging Methods
Block the flow of the condenser air, if Model No. 2BP11700224. necessary, to assure a head pressure of 280 psig during the charging procedure. FIGURE 8 - REFRIGERANT FLOW DIAGRAM Unitary Products Group... -
Page 17: Start-Up
035-18550-001-A-0902 FIGURE 9 - CHARGING CURVE EF-10 (COOLING MODE) START-UP 1. Have sufficient clearances been provided? 2. Has all foreign matter been removed from the inte- CRANKCASE HEATER rior of the unit (tools, construction or shipping materials, etc.)? The crankcase heaters must be energized at least 8 3. -
Page 18: Initial Start-Up
Scroll compressors operate in one direction only. If a three phase scroll compressor is experiencing: 2. If the fan switch on the thermostat is in the “ON” position, indoor section blower motor contactor • Low amperage draw 10M will be energized through terminal G to Unitary Products Group... -
Page 19: Heating Operation
IN ALL THREE RESET METHODS DESCRIBED ABOVE, A FIVE MINUTE TIME DELAY WILL TAKE ABOVE, A FIVE MINUTE TIME DELAY WILL TAKE PLACE AFTER THE RESET BEFORE THE UNIT PLACE AFTER THE RESET BEFORE THE UNIT WILL RESTART. WILL RESTART. Unitary Products Group... -
Page 20: Defrost Cycle
4. All condenser fan motors and the secondary of will open, de-energizing contactor 1M which shuts every transformer is grounded. down the compressor. Contacts 1 and 2 of thermo- stat 1TH are closed when contacts 1 and 3 are Unitary Products Group... -
Page 21: Secure Owner's Approval
Reset the thermostat and wait 5 efficient operation. If the coil is extremely dirty, it may minutes. If the unit doesn’t start, call a serviceman. be necessary to use an industrial grade detergent and a hose to clean the fin surface. Unitary Products Group... - Page 22 035-18550-001-A-0902 Unitary Products Group...
- Page 23 035-18550-001-A-0902 Unitary Products Group...
- Page 24 Subject to change without notice. Printed in U.S.A. 035-18550-001-A-0902 Copyright © by Unitary Products Group 2002. All rights reserved. Supersedes: 035-18550-000-A-0402 Unitary 5005 Norman Products York Group Drive 73069...
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