GE ZONELINE 2800 User Manual

GE Zoneline® packaged
terminal air conditioners

2007 contract sales architects and engineers data manual

Quick Reference

Full Specs on pages 54 and 55

ALL UNITS REQUIRE POWER CONNECTION KIT

Power Connection Kit determines resistance heat output
7000 Btuh units do not activate 5 KW resistance heater

2800 Series Cooling with Electric Heat

MODEL

NUMBER

AZ28E07DA* 7100/6900 12.7/12.7
AZ28E09DA* 9300/8900 12.0/12.0
AZ28E12DA* 11800/11500 11.5/11.5
AZ28E15DA* 14600/14300 10.2/10.2
AZ28E07EA* 7100 12.7
AZ28E09EA* 9000 12.0
AZ28E12EA* 11700 11.5
AZ28E15EA* 14600 10.2

COOLING

(Btuh)

EER

Dry Air 25
2800 Series Cooling with Electric Heat

3800 Series Heat Pump with Backup Electric Heat

MODEL

NUMBER

AZ38H07DA* 7100/6900 12.7/12.7 6400/6200 3.6/3.6
AZ38H09DA* 9000/8800 12.0/12.0 8400/8200 3.6/3.6
AZ38H12DA* 11700/11500 11.5/11.5 10900/10700 3.4/3.4
AZ38H15DA* 14600/14300 10.0/10.0 13400/13200 3.2/3.2
AZ38H07EA* 7100 12.7 6400 3.6
AZ38H09EA* 9000 12.0 8400 3.6
AZ38H12EA* 11700 11.5 10900 3.4
AZ38H15EA* 14600 10.0 13400 3.2

COOLING

(Btuh)

EER

REVERSE CYCLE

BTUH

MODEL

NUMBER

AZ28E07DAP 6800/6600 12.1/12.1
AZ28E09DAP 8600/8400 11.5/11.5
AZ28E12DAP 11200/11000 11.0/11.0
AZ28E07EAP 6800 12.1
AZ28E09EAP 8600 11.5
AZ28E12EAP 11200 11.0

COP

COOLING

(Btuh)

EER

2800 and 3800 Series
Control Panel

5800 Series Heat Pump with Backup Electric Heat

MODEL

NUMBER

AZ58H07DA* 7200/7000 13.0/13.0 6400/6200 3.7/3.7
AZ58H09DA* 9300/9050 12.0/12.0 8400/8200 3.6/3.8
AZ58H12DA* 11800/11600 11.7/11.7 10900/10700 3.4/3.4
AZ58H15DA* 14700/14400 10.3/10.3 13800/13800 3.2/3.2
AZ58H07EA* 7300 13.0 6400 3.7
AZ58H09EA* 9300 12.0 8400 3.6
AZ58H12EA* 11800 11.7 10900 3.4
AZ58H15EA* 14700 10.3 13800 3.2

5800 Series Control Panel

COOLING

(Btuh)

EER

REVERSE CYCLE

BTUH

COP

*Dual rated 230/20 8-volt units are shown wi th ratings separated by “/”.

Units with single rating are 265 -volt units.

2

Power Connection Kits

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230/208-Volt Line Cord Connection Units

Line Cord

Kit

RAK3153 8600/7100 2550/2090 11.6/10.6 15
RAK3203
RAK3303 170100/13900

Electric Heat Amps inclu de electric heater and fan motor current draw.
Each Line Cord Ki t has an integral Le akage Current Detection an d Interruption (LCDI) or Arc Fault
Current Interrupter (AFCI) device as require d by National Ele ctrical Code (NEC) and Underwriter s
Laboratories (UL) for units manufactured afte r August 1, 20 04.

Electric

Heat

BTUH

11700/9600 3450/2820 15.5/14.1 20

Electric

Heater

Watts

5000/4090 22.3/20.3 30

Electric

Heat

Amps

Min. Circuit

Protection

(Amps)

230/208-Volt Sub-Base and Direct Connected Units

Sub-Base

Connection

Kit

RAK204D15P RAK4157 8600/7100 2550/2090 11.6/10.6 15
RAK204D20P RAK4207 11700/9600 3450/2820 15.5/14.1 20
RAK204D30P RAK4307 170100/13900

Electric Heat Amps inclu de electric heater and fan motor current draw.
Units connected through sub-base do not require a LCDI or AFCI device since they are not
considered to b e line-cord connected . Each 230/208-volt sub-base kit consists of sub-b ase with
appropriate receptacle for minimum circuit amperage, chaseway to route power connector from
sub-base to chassis, wiring to connect sub -base to building wiring and a shor t line cord with 9-pin
connector to connect to ch assis and plug into receptacle in sub-base .
Short sub -base line cord may not be used without sub-base.
Junction box for 230/208-volt chassis must be purchased separate ly.
RAK4002A for 2800 and 3800 series units RAK4 002B for 5800 series units.

Direct

Electric

Heat

BTUH

Electric

Heater

Watts

5000/4090 22.3/20.3 30

Electric

Heat

Amps

Min. Circuit

Protection

(Amps)

265-Volt Sub-Base and Direct Connected Units

Sub-Base

RAK204E15 RAK5172 RAK5157 8600 2550 9.6 15
RAK204E20 RAK5202 RAK5207 11700 3450 13.0 20
RAK204E30 RAK5302 RAK5307

Electric Heat Amps inclu de electric heater and fan motor current draw.
265-volt unit s are to be permanently connec ted in compliance with National Electr ical Code and local codes and have a factor y-installe d junction box on the chassi s.
Each 265-volt sub-base kit consists of sub-base with appropria te receptacle for minimum circuit amperage, chaseway to route power connector from sub-base to chassi s
and wiring to connect sub- base to building wiring.
265-Volt Power Connection Kit must be ordered separately.

Power

Connection Kit

Direct

Connection Kit

Electric Heat

BTUH

17000 5000 18.9 30

Electric Heater

Watts

Electric Heat

Amps

Min. Circuit Protection

(Amps)

Important

Essential Elements Ordering Overview

230/208-volt line cord connected units — order line cord kit

230/208-volt sub-base connected units — order sub-base and junction box

265-volt units — order sub-base and power connection kit

Zoneline® Chassis Nomenclature

The Zoneline chassis is identified by a model number defining the type of unit, cooling capacity, electrical information and
optional features included on the unit. When specifying or ordering the Zoneline chassis, the use of this nomenclature will
assure receiving the correct unit.

EXAMPLE

A Z 5 8 H 1 2 D A D

Zoneline
packaged
terminal
chassis

Chassis series
28= deluxe line cool/

electric heat
38=deluxe line heat pump
58= premium line

heat pump

Unit type
E= cooling with electric

resistance heat

H= heat pump with electric

resistance heat

Nominal cooling capacity
07=7,000 BTUH cooling
09=9,000 BTUH cooling
12=12,000 BTUH cooling
15=15,000 BTUH cooling

Voltage/Phase/
Frequency
D= 230/208-Volt,

E= 265-Volt, single-phase,

single-phase, 60 Hz

60 Hz

Universal
power connection

Special Features
B=base unit
C=corrosion treated
D= internal

condensate
removal (ICR)
system (heat
pump models
only) (not for
coastal areas)

P= Dry Air 25 (2800

Series only)

3

The Zoneline® 2800, 3800 and 5800 Series have incorporated changes suggested by customers, along with

Removes

25

%

More
Moisture

GE Dry Air 25

GE 2500 Series Zoneline

®

Amana

Carrier

enhancements by GE’s Technology Team and changes necessary to meet new UL and NEC requirements.

“L” shaped condenser coil.

The “Partial Open Vent Air” feature was a specific request by a customer.

“Heat Sentinel” is an enhancement developed by GE’s Technology Team to help lodging professionals welcome their guests
with a moderate-temperature room and to help lower cooling costs.

Devices have been added on cord-connected units to protect against injury from unsafe power cords.

See the “Features and Benefits” section for in-depth explanation of these changes and the industry-leading features of
GE Zoneline retained from the previous series.

The Deluxe 2800 Series Zoneline Models Includes The “Dry Air 25” Models
Which Remove 25% More Moisture Than Other Zoneline Models.

When the cold air from the evaporator comes in contact
with the re-heat section of the heat pipe, the heat that was
removed by the pre-cool section is added back to the air and
the refrigerant in the heat pipe condenses and flows back
to the indoor coil. The air discharged into the room by this
process is much drier, creating a more comfortable room
condition.

The Newest Innovation from GE

The Dry Air 25 Models center around GE’s exclusive use of
the patented Dinh® Dehumidifier Heat Pipe from Heat Pipe
Technology, Inc. This innovative NASA spin-off technology
enables Dry Air 25 to remove 25% more moisture from the

Deluxe Dry Air 25 Models

Cooling With Resistance Heat

• Remove 25% More Moisture than other Zoneline Models,
up to 2.7 Additional Gallons Per Day

• Cool and Dry Air in Less Time than Standard Zoneline Models

• Heat Pipe is a Separate Sealed Refrigerant System

— No Mechanical Parts — No Special Maintenance Required

• Helps Maintain Lower Relative Humidity In Rooms

• Maintains Comfort at Slightly Higher Room Temperatures

— Reduces Operating Costs — Provides Comfort Without

Overcooling

• Corrosion Treatment is Standard

• Excellent Choice for Humid Climates

• Available in 7000, 9000 and 12000 BTU Sizes

The Dry Air 25 system, a heat pipe, is a hermetically sealed
heat transfer surface installed in a “saddlebag” configuration
around the indoor (evaporator) coil of the Zoneline. This coil
arrangement will transfer heat from the front coil of the
saddlebag to the rear coil without power consumption.
This assembly uses R-22 as the refrigerant and is not
connected to the regular Zoneline refrigerant circuit.

As warm, humid air is pulled through the pre-cool (front)
section of the heat pipe, the heat removed from the air is
absorbed by the refrigerant, causing the refrigerant to change
to a gas and flow to the re-heat (rear) section of the heat
pipe. The air leaving the pre-cool section of the heat pipe is
cooler and at a higher relative humidity level than the room
air. The pre-cooled air is further cooled as it passes through
the evaporator; consequently, the relative humidity increases
allowing the evaporator coil to remove more moisture.

4

air than other leading manufacturers’ packaged terminal air
conditioners. This helps maintain room comfort at a higher
room temperature, reducing operating costs.

The Dry Air 25 keeps a room cool and dry, and this is the
most important benefit when it comes to the occupant of
the room — hotel guests, apartment residents, students.
In a hot, humid climate, getting away from the humidity
is just as important as the heat, and the Dry Air 25 is the
perfect solution. The dehumidification of the Dry Air 25 has
been verified by the same ARI test conditions that standard
units are rated under. A list of customers using Dry Air 25 is
available from GE.

COMPARISON OF DRY AIR 25 DEHUMIDIFICATION*

*Based on 12,000 BTU Units.

NOTE: The Dry Air 25 models include all features of the 2800 series.

Table of Contents

Front Cover 1

Mini Specs 2800, 3800 and 5800 Series 2

Mini Specs Power Connection Kits and Nomenclature 3

The 2800/3800/5800 and Dry 25 4

Table of Contents 5

Introduction 6

The Zoneline System 7

Features and Benefits

Features Table 8

Features and Benefits 9-11

Auxiliary Control Switches 12-13

Central Desk Control 14

Remote Thermostat Control 15-17

Heat Pumps and Energy Savings 18-19

Installation and Dimensions

Application Comments 20

Case Dimensions 21

Wall Case/Sub-Base Installation 22-33

Condensate Disposal Systems 34-36

Ducted Installations 37-39

Exterior Grilles 40-41

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Product Data

Electrical Connection 42

Essential Elements Ordering Overview 43

Maximum Connected Load 44

Cooling/Heat Pump Performance Data 45

Latent System Capacity 46

Normal Yearly Operating Data 47

Schematics 48-50

Product Specifications

Suggested Bid Form Specifications 51-53

Zoneline Chassis Nomenclature/Receptacles/Sub-bases 54

Specifications 55

Complete Accessory List 56

General Installation Suggestions 57-58

Warranty 58

Alphabetical Index 59

Back Cover 60

Important Notice

Equipment used as a primary source for
heating or cooling is an integral part of
the building in which it is installed. Proper
application is essential for satisfactory
performance over a wide range of
operating conditions. It is strongly
recommended that a professional
engineer determine proper application.

If this unit is a replacement unit, its
specifications and performance
may differ from those of the unit it is
replacing. For that reason, we again
strongly recommend that a professional
engineer determine proper application.

5

Introduction

This manual is designed to provide product, performance
and application information to our customers and their
architects and engineers for use in selection and design
of a zonal comfort control system utilizing GE Zoneline®
Packaged Terminal Air Conditioners (PTAC) and Packaged
Terminal Heat Pumps (PTHP). GE Zoneline PTACs and PTHPs
are self-contained units designed for through-the-wall
installations in hotels, motels, apartments, hospitals,
nursing homes, add-on rooms and many other installations.

Zonelines provide individual room or zone control in both
cooling and heating operation. There is a model for practically
every application, ranging in cooling capacity from 7,100 to
14,700 BTUH and heating capacity from 6,400 to 13,400 BTUH
in heat pump operation. See pages 33 and 55 for resistance
heaters available.

Zoneline offers a two-tier lineup: the Deluxe Line and the
Premium Line. The Deluxe Line consists of the 2800 Series
with electric resistance heat, the 2800 Series Dry Air 25 Models
with enhanced dehumidification for hot and humid climates
and the 3800 Series heat pump. The 3800 Series heat pump
features reverse cycle defrost and simultaneous supplemental
resistance heat, when needed, to maintain room comfort.
The Premium Line features the 5800 Series heat pump with
reverse cycle defrost and supplemental resistance heat, when
needed, to maintain room comfort, plus tactile touch controls
with digital display and standard corrosion protection.

Deluxe Line Standard Features:

• Universal Heaters

• 2 Fan Motors

• Heat Sentinel

• “L” Coil Design Condenser

• Locked-In-Place Control Knobs

• 3-Position Vent Door

• Freeze Sentinel

• Indoor Coil Frost Control

• Central Desk Control Interface

• Remote Thermostat Control Interface

• Random Restart

• Electronic Temperature Limiting

• “Smart Fan” Fan Cycle/Continuous Control

• Transfer Fan Interface

• Room Occupancy Sensor Interface

• Reverse Cycle Defrost and Simultaneous Supplemental
Resistance Heat on Heat Pumps

• Quick Heat Recovery

Deluxe Line Optional Features:

• Corrosion Protection

• Internal Condensate Removal (on 3800 Series Heat Pump
without Corrosion Protection)

NOTE: Dry Air 25 models include all the standard features of the 2800 Series plus

standard corrosion protection.

6

Premium Line Standard Features:

All the Standard Features of the Deluxe Line Plus:

• Two fan motor system with Indoor Cross Flow Blower
for quieter operation

• Digital Controls

—LED Temperature Display
—Easy Temperature Selection
—Tactile Touch Pad

• Unit Diagnostics

• Standard Corrosion Protection Treatment

Premium Line Optional Features:

• Internal Condensate Removal (Not for use in seacoast
or corrosive areas)

Advantages of the GE Zoneline System:

• Flexible Application

— May be installed from flush to finished floor to 3" from

the ceiling
— 7,100 to 14,700 BTUH units in same physical size
— Deluxe 2800 and 3800 Series may be ducted to condition

more than one room
— Compatible with Class 2 remote thermostat control
— Compatible with 2 wire CDC or many Energy

Management systems

• Economical Installation
— No ductwork necessary
— No mechanical equipment rooms or pipes required for

heating/cooling units
— Replacement units fit existing 42"-wide by 16"-high

wall cases

• Quiet Operation
— Indoor double cut-off scroll: two fan motor 2800 and 3800

Series units
— Indoor cross-flow blower: 2 fan motor 5800 Series units

• Energy-Saving Operation
— Units in unoccupied areas may be turned off
— Designed for efficient cooling operation — EERs from 10.0

to 13.0
— Efficient heat pump units — COPs from 3.2 to 3.6
— Extended heat pump operation without sacrificing

room comfort

• Ease of Maintenance
— Permanently lubricated fan motors
— Upfront lift-out interchangeable filters
— Air Discharge area is easily accessed for cleaning
— Slide-out chassis for easy access for cleaning or if

service is required

• Reverse Cycle Heat Pump Operation

Both the 3800 and the 5800 Series heat pumps utilize
the unique GE PTAC heat pump operation to ensure a
comfortable room. The logic used by the units is the
same logic used by central system heat pumps to
provide greater savings.

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The Zoneline® System

The typical Zoneline installation consists of the wall case (or sleeve), chassis, and exterior grille. Some installations may
use a sub-base for support of the unit or for ease of electrical connections. Each of the components should be the standard
products offered by GE or, in the case of the exterior grille, approved by GE Applications Engineering. Use of components not
specifically designed or approved for use with the Zoneline can result in unsatisfactory operation and can be the cause of
failure not covered by the warranty.

Components of the Zoneline System

Typical Installation (Deluxe Series shown)

Wall Case

Chassis

Room Cabinet

RAB71A (Steel-Insulated)
RAB77 (SMC — Molded)
Wall Case Options
(See page 22)

Optional Accessories of the Zoneline System

Chaseway

RAK204D20P Sub-Base (shown)

RAG67 (shown)
Grill Options
(See page 40)

Power Connection Kit (required on all units)
Line Cord Kit shown
See pages 42-43

Power Supply Cord

RAK6052 Duct Adapter
(For Deluxe Series)

Power Supply Cord (included with 208v/230v
sub-bases)

See pages 23 and 33 for information on electrical sub-bases and chaseway.
See pages 37-39 for information on ducted installations.

RAK601/602 (For Deluxe Series)
Duct Extension, Register and Trim Flange

7

Zoneline® Features

AZ AZ AZ
2800 3800 5800

Enhanced Dehumidification — Dry Air 25 Optional N/A N/A

Cooling EER Range (230 Volts/265 Volts) 10.2 - 12.7 10.0 - 12.7 10.2 - 13.0

Heating COP Range (230 Volts/265 Volts) N/A 3.2 - 3.6 3.2 - 3.6

Heat Source — Electric Resistance Heat Standard — —

Heat Source — Heat Pump With Selectable

Full Time or On Demand Simultaneous/
Supplemental Resistance Heat — Standard Standard

Staged Heating — 3 Stage 3 Stage

Universal Heater — UPC* Standard Standard Standard

Unit Controls Rotary Knobs Rotary Knobs Touch Pad

Electronic Temperature Selection
(Slews Up & Down) with Digital Display — — Standard

Unit Diagnostics — — Standard

Highly Featured Microprocessor Controls Standard Standard Standard-Plus

Electric Resistance Heat Lock-Out (above 46°F) — Standard Standard

Automatic Emergency Heat — Standard Standard

Heat Pump Defrost System — Reverse Cycle Reverse Cycle

High Temperature Operation Protection — Standard Standard

Quick Heat Recovery — Standard Standard

Temperature Boost Selectable Selectable

Service Indicator — — Temp Display Blinks

Fan Motors — Permanently Lubricated 2 2 2

2-Speed Outdoor Fan Standard Standard Standard

Indoor Fan Speed Selections — HIGH/LOW Standard Standard HIGH/LOW/AUTO

Fan Only Setting — HIGH/LOW Standard Standard Standard

Fan Cycle Switch “Smart Fan” “Smart Fan” “Smart Fan”

Constant-Run Fan Selectable Selectable Selectable

Rotary Compressor Standard Standard Standard

Automatic Compressor Restart Delay Standard Standard Standard

Freeze Sentinel™ Standard Standard Standard

Heat Sentinel Standard Standard Standard

Indoor Coil Frost Control Standard Standard Standard

Transfer Fan Connections Standard Standard Standard

7-Step Electronic Temperature Limiting Standard Standard Standard

Remote Control Capability with Wall Mounted Thermostat Standard Standard Standard

Central Desk Control Capability Standard Standard Standard

Energy Management System Interface with Load Shedding Option Standard Standard Standard

Reversible Indoor Air Louvers 40º/50º Standard Standard Standard

Up-Front Filters Standard Standard Standard

Easy-Clean Air Discharge Area Standard Standard —

Concealed Manual Vent Control Standard Standard Standard

Ducted Installation Capability RAK6052 RAK6052 —

Corrosion Protection (Standard on Dry Air 25) Optional Optional Standard

Internal Condensate Removal (ICR) (Factory Installed Option.
Cannot be used in Corrosion Areas.) N/A Optional Optional

*UPC — Universal Power Cord Connection (See pages 42 and 55).
265-volt unit s must be connected in a manner to meet National Electr ical Code and all local codes.

8

Features and Benefits

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Standard Physical Dimensions

GE has maintained the same dimensions since 1961 —
42" wide x 16" high x 13-3/4" deep

Replacement of older units is made easy.

Weather-Protected Electrical Components

Vital electrical components are protected from the weather
by locating them on the indoor side of the weather barrier.

Weather-Resistant “Superseal”

Properly installed unit in undistorted case keeps air leakage
to a minimum.

7 CFM air infiltration with 25 MPH wind on non-ICR units —
10 CFM on units with ICR.

Industry specification is 19 CFM of air infiltration.

Heater Sizes to Meet Room Requirements

All units are equipped with a universal heater —
the resistance heat output is determined by power
connection kit.

230/208-volt — Line Cord Connected Units — 2.55/2.09 KW
with RAK3153 — 15-amp circuit; 3.45/2.82 KW with
RAK3203 — 20-amp circuit; 5.0/4.09 KW with RAK3303 —
30-amp circuit.

230/208-volt - Sub-Base Connected Units — 2.55/2.09
KW with RAK204D15P — 15-amp circuit; 3.45/2.82 KW
with RAK204D20P — 20-amp circuit; 5.0/4.09 KW with
RAK204D30P — 30-amp circuit.

265-volt — 2.55 KW with RAK5172 — 15-amp circuit; 3.45 KW
with RAK5202 — 20-amp circuit; 5.0 KW with RAK5302 —
30-amp circuit.

Unit Controls

2800 and 3800 Series — locked-in-place rotary knobs for
temperature and operation selection.

5800 Series — touch pad controls with digital readout of
temperature set point.

Highly Featured Microprocessor Controls

Microprocessor controls are programmed to interface with
the temperature sensors to maximize comfort conditions for
the room occupant and provide outstanding features.

Thermistors are used to sense small changes in temperature
to give excellent room control and allow the microprocessor
to monitor and react to changing conditions.

Electric Resistance Heat Lock-Out

To maximize the savings of the heat pump operation, the
Zoneline heat pumps do not utilize the resistance heater
when the outdoor temperature is above 46°F during normal
operation. The resistance heat is used in the Quick Heat
Recovery feature.

Reverse Cycle Heat Pump Defrost System

Standard on all Zoneline 3800 and 5800 Series heat pumps.

Enables heat pump to operate at lower temperatures
when other systems switch to more expensive electric
resistance heat.

See pages 18 and 19 for discussion of heat pump operation
and defrost systems.

High Temperature Heat Pump Operation Protection

Automatically protects the compressor if heat pump is
operated with high outdoor temperatures.

Power to the outdoor fan is turned off if the indoor coil gets
too hot during heat pump operation to prevent damage to
the compressor.

Quick Heat Recovery – Heat Pump Units

When the unit operation is changed from STOP or COOL to
HEAT, the electric resistance heaters are used to warm the
room to the thermostat set point. This provides faster room
temperature increase for greater guest comfort.

Unit Diagnostics

The 5800 Series has a dip switch that activates each of
the various components of the unit to operate briefly. This
enables the technician to determine if individual components
are functioning properly.

Service Indicator

On the 5800 Series, if the microprocessor detects a
compressor malfunction, the digital temperature display
will blink. If the malfunction occurs during cooling operation,
the indoor fan will continue to operate. If the compressor
malfunctions in heating mode, the unit will automatically
switch to resistance heat to maintain room temperature set
point. GE Service should be called to check the Zoneline.

Fan Motors – Permanently Lubricated

All units have two fan motors for quiet operation and
maximum operating efficiency.

Motors are permanently lubricated to reduce maintenance
and totally enclosed to keep dirt and water out of the motor
windings.

2-Speed Outdoor Fan

The unit automatically selects the most efficient speed for
the outdoor fan. The operating sound level is lower when the
outdoor fan can operate in low speed yet there are situations
where it must operate in high speed. The unit changes the
fan speed automatically.

Indoor Fan Speed Selections – HIGH/LOW

Unit may be operated in HIGH HEAT or LOW HEAT or HIGH
COOL or LOW COOL.

Automatic Emergency Heat

Automatically uses electric resistance heat if the heat
pump output is not sufficient to maintain selected
room temperature.

9

Features and Benefits

Fan-Only Setting – HIGH/LOW

The unit provides the option of selecting either HIGH or LOW
speed for Fan-Only operation.

Fan-Cycle Switch – “SmartFan”

Unique “SmartFan” allows unit to operate fan continuous in
cooling operation and fan cycle in heating to provide better
guest comfort. Eliminates complaint of cold air draft during
heating operation.

Eliminates need of changing fan-cycle switch seasonally.

“SmartFan” settings are controlled by two dip switches on
auxiliary control panel.

Compressor Random Restart

In the event of a power failure, all compressors attempting
to restart immediately when power is restored can result
in a power surge that can cause another power interruption.

The microprocessors in the Zonelines have a random restart
logic system that prevents all units from starting at the
same time.

Rotary Compressor

Smoother operation for quiet, dependable service. GE has
used rotary compressors since 1961.

Compressor Restart Delay

Zonelines are designed to provide a minimum of three
minutes of compressor off time to allow refrigerant pressures
to equalize before restarting to prevent compressor damage.

Zonelines are also designed to provide a minimum of three
minutes of compressor run time to prevent room occupant
disturbance due to short-cycling of the air conditioner.

Freeze Sentinel

Detects low room temperature and turns on heater to
help protect against damage caused by freezing room
temperature.

Heater turns on at 41°F and warms indoor thermistor
temperature to 46°F and shuts off.

Freeze Sentinel may be turned off by dip switch on
auxiliary control.

™

Heat Sentinel

The property owner may choose to activate the Heat
Sentinel feature on the Zoneline. If the Heat Sentinel is
activated and room temperature reaches 85°F while the
unit is in the “STOP” setting, the unit will automatically start
in air conditioning operation and will shut off when the room
temperature reaches 80°F. This will help dehumidify the air
and lower high temperatures so the guest will not be entering
an extremely hot room.

Indoor Coil Frost Control

Prevents indoor coil from freezing
and causing complaints due to lack
of cooling. Frost can form on the
indoor coil when the unit is operated
in cooling when outdoor temperatures
are low. The unit automatically shuts
the compressor off until the indoor coil
temperature warms to the point where
frosting will no longer occur.

Transfer Fan Interface

24 VAC terminals are provided to operate a relay to control
a fan mounted in a wall to move conditioned air into
another space. The electrical power for the operation of the
transfer fan itself is not provided by the Zoneline. Transfer
fans and their controlling relays are field supplied.

Electronic Temperature Limiting

Seven independent programmable heating temperature limits
and seven independent programmable cooling temperature
limits. Eliminates need to reset the limits seasonally.

Heating Temperature Limits

65 70 72 74 76 78 80 85

Lowest

Cool

60 64 66 68 70 72 74 76

Limits are set by dip switches on auxiliary control panel.

Cooling Temperature Limits

Highest

Heat

Remote Control Capability with Wall-Mounted
Thermostat

See pages 15-17.

Central Desk Control Capability

See page 14.

Energy Management System Interface with
Load Shedding Option

All units have a switch on the auxiliary control panel to
allow the indoor fan to continue operating if the unit is
connected to an Energy Management System that shuts
off compressor or heater operation. By allowing the indoor
fan to run when the heater or compressor is shut off by
the Energy Management System, the guest is less likely to
realize the operation of the unit has been altered. This helps
reduce peak energy demand loads without disturbing the
room occupant.

Reversible Indoor Air Louvers

Allows air to be directed into room at 40º or 50º angle to
provide better air distribution.

Angle is changed by removing room front and screws
holding louver in place, and rotating louver section.

10

Features and Benefits

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Up-Front Air Filters

Two interchangeable
up-front filters, easy
to remove and reinstall,
may be cleaned without
opening or removing
the room front.

Clean filters by brushing,
vacuuming or back­flushing under faucet
or shower head.

Easy Clean Air Discharge Area

2800 and 3800 Series units have an out-of-sight vertical
protective screen over the indoor fan. This allows easy
cleaning of air discharge area by simply removing room
front and wiping clean.

There is no screen directly below discharge louver to trap
unsightly dirt and debris where it may be seen by room
occupant.

Concealed Manual
Vent Control

The 3-position manual vent
door control may be closed,
partially open or fully open.

Vent CFM High Speed

Unit Full Open Partial Open

7000 50 40

9000 70 45

12000 75 45

15000 75 45

CFM ratings at 230 volts and 265 volts.

Greater amounts of air will be introduced if the room has an
exhaust fan.

An open vent door brings unconditioned outdoor air into the
room, increasing heating and cooling costs.

Positive vent door closure prevents accidental opening and
unwanted air infiltration.

Corrosion Protection (Optional)

2800 and 3800 Series units may be ordered with special
protection to better withstand damage from salt air and
salt water in seacoast areas.

Corrosion protection is standard on the 5800 Series and
on Dry Air 25 models.

Heat Pump units with ICR are not available with corrosion
protection and should not be installed in seacoast or
corrosive environments.

Units installed in corrosive areas should be examined and
cleaned more frequently than normal installations.

Internal Condensate Removal (ICR)

See page 34 for a discussion of the Internal Condensate
Removal system available on 3800 and 5800 Series heat pumps.

Enhanced Dehumidification

Moisture removal is an important function of an air
conditioner. People are more comfortable at higher
temperatures when the humidity level is relatively low.
Air conditioners operate with less energy consumption
when the room temperatures are set higher.

The GE Zoneline® 2800 Series with the Dry Air 25 heat pipe
application removes 25% more moisture than the base
2800 Series unit.

The GE Zoneline Dry Air 25 chassis is the only PTAC available
with the application of the patented Dinh® Dehumidifier
Heat Pipe under license from Heat Pipe Technology, Inc.

Customers who are using the Dry Air 25 report a fresher­smelling room as a result of the lower humidity levels, as
well as lower operating costs.

Locking Door Kit

RAK8023 — A door with a lock that replaces the standard
control cover door to prevent unauthorized changing of
control setting is offered as an accessory.

11

Auxiliary Control Switches

HIGH
COOL

1 2 3 4 5 6 1 2 3 4 5 67 8

UP

DOWN

UP

DOWN

ALLI2R (All Electric Heat)

(3800 Series models only)

C: FAN CN (Cooling–Smart Fan)
H: FAN CY (Heating–Smart Fan)

CLASS 2 (Remote Thermostat)

LOAD SHEDDING (CDC)

FREEZ Sen (Freeze Sentinel)

CONST FAN (Constant ON Fan)

OCCUPIED (Occupancy Sensor)

TL1 (H) (Temp. Limit 1–Heat)
TL2 (H) (Temp. Limit 2–Heat)
TL3 (H) (Temp. Limit 3–Heat)

TL1 (C) (Temp. Limit 1–Cool)
TL2 (C) (Temp. Limit 2–Cool)
TL3 (C) (Temp. Limit 3–Cool)

7

8

Heat Sentinel

HEAT BOOST
(3800 Series models only)

These switches are located behind the room cabinet under the control panel.

2800 and 3800 Series

Switches Description
Left Switches

(1) ALL I2R Heat pump override —

Down — Normal heat pump operation
Up — resistance heat only (3800 Series only)

(2) C: FAN Fan control for cooling operation —

Down — Fan Continuous
Up — Fan Cycle

(3) H: FAN Fan control for heating operation —

Down — Fan Cycle
Up — Fan Continuous

(4) CLASS 2 Remote Thermostat Mode —

Down — Unit Control
Up — Remote Thermostat

(5) LOAD SHED Load Shedding when connected to Central Desk Control System —

Down — Fan shuts off with unit
Up — Fan under “Smart Fan” settings

(6) FREEZ S Freeze Sentinel™ Override —

Down — Freeze Sentinel ON
Up — Freeze Sentinel OFF

(7) CONST FAN Constant Fan —

Down — Fan runs normally
Up — Fan runs when unit is in STOP position

(8) OCCUPIED Occupancy Sensor Mode —

Down – Unit Control

Up — Occupancy Sensor Connected
Right Switches
TL1 – TL3 Cooling temperature limiting (See table at bottom of page)
TL4 – TL6 Heating temperature limiting (See table at bottom of page)
(7) Heat Sentinel switch —

Down — Heat Sentinel OFF

Up — Heat Sentinel ON
(8) Heat Boost (3800 series only) —

Down — Heat Boost OF

Up — Heat Boost ON
Auxiliary (2800 and 3800 series)

3800 Series shown

Cooling and Heating temperature limits are set independently, temperature limiting
switches are in factory-set down position, except as noted.

Cooling Temperature Limits

Switches Up NONE 1 1, 2 2 2, 3 1, 2, 3 1, 3 3

Switches Up 6 4, 6 4, 5, 6 5, 6 5 4, 5 4 NONE

12

60 64 66 68 70 72 74 76

65 70 72 74 76 78 80 85

Heating Temperature Limits

Auxiliary Control Switches

HIGH
COOL

1 2 3 4 5 6 1 2 3 4 5 67 8

UP

DOWN

UP

DOWN

ALLI2R (All Electric Heat)

(5800 Series models only)

C: FAN CN (Cooling–Smart Fan)
H: FAN CY (Heating–Smart Fan)

CLASS 2 (Remote Thermostat)

LOAD SHEDDING (CDC)

FREEZ Sen (Freeze Sentinel)

CONST FAN (Constant ON Fan)

OCCUPIED (Occupancy Sensor)

TL1 (H) (Temp. Limit 1–Heat)
TL2 (H) (Temp. Limit 2–Heat)
TL3 (H) (Temp. Limit 3–Heat)

TL1 (C) (Temp. Limit 1–Cool)
TL2 (C) (Temp. Limit 2–Cool)
TL3 (C) (Temp. Limit 3–Cool)

7

8 9

Diagnostics Switch

HEAT BOOST
(5800 Series models only)

Heat Sentinel

These switches are located behind the room cabinet under the control panel.

5800 Series

Switches Description
Left Switches

(1) ALL I2R Heat pump override —

Down — Normal heat pump operation
Up — resistance heat only

(2) C: FAN Fan control for cooling operation —

Down — Fan Continuous
Up — Fan Cycle

(3) H: FAN Fan control for heating operation —

Down — Fan Cycle
Up — Fan Continuous

(4) CLASS 2 Remote Thermostat Mode —

Down — Unit Control
Up — Remote Thermostat

(5) LOAD SHED Load Shedding when connected to Central Desk Control System —

Down — Fan shuts off with unit
Up — fan under “Smart Fan” settings

(6) FREEZ S Freeze Sentinel Override —

Down — Freeze Sentinel ON
Up — Freeze Sentinel OFF

(7) CONST FAN Constant Fan —

Down — Fan runs normally
Up — fan runs when unit is in STOP position

(8) OCCUPIED Occupancy Sensor Mode —

Down — Unit Control

Up — Occupancy Sensor Connected
Right Switches
TL1 – TL3 Cooling temperature limiting (See table at bottom of page)
TL4 – TL6 Heating temperature limiting (See table at bottom of page)
(7) Diagnostics Switch
(8) Heat Sentinel switch —

Down — Heat Sentinel OFF

Up — Heat Sentinel ON
(9) Heat Boost —

Down — Heat Boost OFF

Up — Heat Boost ON

5800 Series shown

ge.com

Cooling and Heating temperature limits are set independently, temperature limiting
switches are in factory-set down position, except as noted.

Switches Up NONE 1 1, 2 2 2, 3 1, 2, 3 1, 3 3

Switches Up 6 4, 6 4, 5, 6 5, 6 5 4, 5 4 NONE

Cooling Temperature Limits

60 64 66 68 70 72 74 76

Heating Temperature Limits

65 70 72 74 76 78 80 85

13

Central Desk Control

Unit #2

Unit #1

Unit #3

CDCTerminals

onZoneline

Some installations may want to govern the ability of the unit
to operate from a control device remote to the unit or even
remote to the room in which the unit is located. The general
term given to systems such as this is Central Desk Control.
The most common installation of this type of system is a
switch mounted at the registration desk and, upon guest
check-in, a button is pushed or a switch is moved to allow
the air conditioner to operate. Likewise, when the guest
checks out the device is put into the “OFF” position so the
unit will not operate while the room is vacant.

It is not necessary that the controlling device be located
at a central desk to employ a device that will control the
unit operation. For instance, in some resort areas devices
are connected to sliding glass doors and opening the door
causes a contact to close, turning the air conditioner off.
This prevents energy being wasted by operating the air
conditioner when warm, humid air is entering the room.
Some systems operate by motion sensors or heat sensing
detectors mounted in the room. These types of systems
determine occupant presence in the room and allow the
unit to operate; if no one is in the room the device signals
the air conditioner to turn off.

Zoneline® models offer Load-Shedding capabilities on
units connected to Central Desk Control Systems. For more
information on the models’ Load-Shedding Feature, see
page 10.

There is a wide variety of devices available, each with
its own benefits and constraints. While GE does not offer
components that are external to the unit for a Central Desk
Control (CDC) system, GE Zonelines are compatible with most
CDC and Energy Management systems. Zonelines provide a
24 VAC circuit that powers the Central Desk Control system
and no external power is needed.

All Zoneline 2800, 3800, and 5800 Series units are compatible
with simple on/off 2-wire Central Desk Control systems.
Consult with the provider of other energy management
systems to be sure they are compatible with the GE Zoneline.
Zonelines have standard connectors factory-installed to
provide a CDC interface that permits the unit to be connected
to most of the energy management systems. The devices
connected to the Zoneline units require no power supply or
transformers external to the unit.

Important CDC Comments (all series applicable)

4. Recommended wire size must be followed as a minimum
requirement.

Wire Size #AWG Maximum Allowable Length
#22 600 Ft.

#20 900 Ft.

#18 1500 Ft.

#16 2000 Ft.

Freeze Sentinel™ remains operational when the unit is
connected to a CDC system. Even if the unit is turned “OFF” at
the central location, if the sensor at the unit detects the low
temperature, the electric resistance heaters and the fan will
automatically turn on.

Connecting the Zoneline to a CDC system does not eliminate
the ability to connect the unit to a remote thermostat.
Once the circuit is “opened,” and control of the unit removed
from the CDC system, the selected controls - either the unit
mounted control or the remote thermostat - govern the
operation of the unit.

Please see page 57 for installation recommendations for
the Central Desk Control wiring.

CDC Terminal Location and Typical Wiring

See page 15 for location of CDC terminals on unit.

Example of Common Bussing

NOT PERMITTED

INCORRECT Common Bussing

Normally Open

Switch -

Unit Operational

1. When the switching device closes the circuit of the CDC
conductors, the unit operation stops.

2. Do not use a common buss (at the unit or at the switch
panel) in the wiring. Both wires comprising the circuit must
connect to the unit connectors and to the controlling
switch. Running one wire from one unit to another unit is
common bussing and may damage internal components
or cause erratic operation of the system.

3. A 24-volt transformer is contained within the Zoneline.
No external voltage may be applied to the unit through
the CDC terminals. (Voltage on the CDC conductors is
24 volts AC.)

14

Typical Wiring

(All Wiring Shown Is Field Supplied)

Remote Thermostat Control

R

GL

GH

B

Y

W

C

Common — Ground
White — Heater
Yellow — Compressor
Black — Not Used On 2800
Green — High-Speed Fan
Green — Low-Speed Fan
Red — 24V AC
CDC Terminal

CDC

ge.com

In some installations, control of the operation of the unit at
a location remote from the unit itself may be desired. A unit
mounted high in the wall or over a door, for instance, where
the unit-mounted controls are inaccessible, can be connected
to a wall-mounted thermostat. Other installations may use
remote thermostat control for design or performance
enhancement. The unit is connected to the thermostat by
low-voltage wiring which permits the operation of the unit to
be selected and the temperature sensed at the thermostat.

Important Notes: Remote thermostat wiring should not be
run through wall case. Thermostat wiring should exit the
wall below the unit and enter the unit between room cabinet
and chassis. Wire molding may be used to hide thermostat
wiring. If a sub-base is used, the thermostat wiring may be
concealed by the sub-base. Thermostat wiring should not be
run parallel to line voltage wires since induced current may
cause erratic operation.

All Zoneline 2800, 3800 and 5800 Series units are adaptable
to Class 2 remote low-voltage thermostat. The only additional
field-supplied components are the remote thermostat and
wiring necessary to connect it.

The controls on the unit are not functional when the remote
control function is used.

Resistance Heat Models

The Zoneline 2800 resistance heat units may be connected to
a single-stage thermostat designed for use with cooling with
electric heat systems. GE offers three thermostats
compatible with the 2800 Series unit.

The AC voltage may not be compatible with some
solid-state thermostats.

The fan speed for the 2800 Series in remote thermostat
operation is selected by the connection of the fan wire from
the thermostat to either the HIGH or LOW terminal on the unit.
See the sketch of the unit terminals for the location of the HIGH
and LOW fan-speed terminals. Operating the unit in low fan
speed reduces the operating sound level of the unit.

Freeze Sentinel™ remains operational if the unit is connected to
a remote thermostat. The unit may be connected to a Central
Desk Control (CDC) system and controlled with a remote
thermostat when the CDC system has the unit in operation.
See page 14 for additional information on the CDC system.

Unit temperature limiting switches are not functional when
unit is connected to a remote thermostat.

Field Wiring Terminal

R — 24V AC
GL — Low-Speed Fan
GH — High-Speed Fan
B — Not Used on 2800
Y — Compressor
W — Heater
C — Common — Ground

RAK163A1 —
a mechanical
manual
changeover
thermostat
requiring four
connection wires.

RAK164D1 —
a solid-state
digital manual
changeover
thermostat
requiring five
connection wires.

RAK164P1 —
a solid-state digital
programmable
auto-changeover
thermostat
requiring five
connection wires.

The Class 2 Mode Switch (dip switch #4 on the auxiliary control
board) must be set to the ON/UP mode to enable remote
thermostat control. Refer to installation instructions packaged
with the chassis.

Please see page 57 for installation recommendations for
the remote thermostat wiring.

Compatibility of other thermostats considered for use with the
GE Zoneline is the responsibility of the customer. The control
voltage on the remote control conductors is 24 volts AC.

RAK806 Universal Control Cover Label

When a Zoneline unit
is using a remote
thermostat control,
the RAK806 Universal
Control Cover Label
is recommended. The
RAK806 is only
available in a
package of 10 labels.
The label is placed
over the control
panel directing the
user to the wall
thermostat for
operation of the
Zoneline unit.

15

Remote Thermostat Control

R

GL

GH

B

Y

W

C

Common — Ground
White — Heater
Yellow — Compressor
Black — Not Used On 2800
Green — High-Speed Fan
Green — Low-Speed Fan
Red — 24V AC
CDC Terminal

R

GL

GH

B

Y

W

C

Common — Ground
White — Heater
Yellow — Compressor
Black — Reversing Valve
Green — High-Speed Fan
Green — Low-Speed Fan
Red — 24V AC

Resistance Heat Models

CDC

Heat Pump Models

The Zoneline® 3800 and 5800 Series heat pump units may
be connected to a single-stage cooling/two-stage heating

Temperature Boost option should not be used with remote
thermostat operation since this will cause the unit to switch to
resistance heat when outdoor temperatures are below 46ºF.

thermostat designed for use with heat pump systems. GE
offers 3 thermostats compatible with the 3800 and 5800
series units:

RAK147 —
mechanical
manual
changeover
thermostat
requiring 6
connection wires.

RAK148D1 —
solid-state digital
manual
changeover
thermostat
requiring 6
connection wires.

RAK148P1 —
solid-state digital
programmable
auto-changeover
thermostat
requiring 6
connection wires.

Please see page 57 for installation recommendations for the
remote thermostat wiring. Compatibility of other thermostats
considered for use with the GE Zoneline® is the responsibility
of the customer.

The control voltage on the remote control conductors is 24 VAC.
The Class 2 Mode Switch, dip switch #4 on the auxiliary control

board on both the 3800 series and the 5800 series, must be set
to the ON/UP mode to enable remote thermostat control. Refer
to installation instructions packaged with the chassis.

Feature Heat Pump Electric Heat

Indoor Frost Control Yes Yes
Freeze Sentinel Yes Yes
Auto Fan Speed No No
Electronic

Temperature Limiting No No
Switch to Resistance

Heat Based On Indoor
Temperature

Switch to Resistance
Heat Based On
Outdoor Temperature Yes N/A

Reverse Cycle Defrost Yes N/A
Simultaneous

Resistance Heat
with Heat Pump No N/A

Resistance Heat
Lockout Yes N/A

“Smart Fan”
Fan Cycle

Central Desk Control Yes Yes

Field Wiring Terminal

R — 24V AC GL — Low-Speed Fan
GH — High-Speed Fan B — Reversing Valve
Y — Compressor W — Heater
C — Common - Ground

The fan speed for the 3800 and 5800 series in remote
thermostat operation is selected by the connection of the
fan wire from the thermostat to either the HIGH or LOW
terminal on the unit. See the sketch of the unit terminals
for the location of the HIGH and LOW fan speed terminals.
Operating the unit in low fan speed reduces the operating
sound level of the unit.

When connected to a remote thermostat, the indoor air
temperature sensing is shifted from the unit to the remote
thermostat. For this reason, the units will operate slightly
differently when connected to a remote thermostat. The
following chart shows the unit operation when connected
to a remote thermostat.

Remote Thermostat Control Selection Chart For Zoneline Packaged Terminal Units

Zoneline Series Thermostat Model Type Function Low-Voltage Conductors

2800 RAK163A1 Mechanical

RAK164D1 Digital 5

RAK164P1 Digital Programmable 5

Cooling and Heating

Determined by
Remote Thermostat N/A

Fan ON/AUTO Set On
Remote Thermostat

Fan ON/AUTO Set On
Remote Thermostat

4

3800 and 5800

Thermostat wire size – up to 60 feet AWG20 – up to 66 feet AWG18

16

RAK147 Mechanical

RAK148D1 Digital 6

RAK148P1 Digital Programmable 6

Single Stage Cooling –

6

2 Stage Heating

Remote Thermostat Control

ge.com

Multiple Units Connected to One Remote Thermostat
(2800 Series)

One remote control thermostat may be used to control
multiple resistance heat Zoneline units, however the units
may not be wired direct. Since each Zoneline unit has an

integral transformer, direct wiring can result in a “bucking”
or boosting” voltage condition, and is in violation of the
National Electric Code. The diagram below shows the
correct wiring for such an installation through the use
of field supplied isolation relays.

For Use With Mechanical 4-Wire Systems Only

Remote Control (Low Voltage) Wiring

One stage Thermostat Controlling Three Zoneline Units
Resistance Heat Zoneline 2800 Series Units
(Not Applicable on Heat Pump Units)

Field-Supplied Relay Specifications

Number Of

Units Controlled

2 POTTER and BRUMFIELD TYPE KA11AY-24 OR EQUIVALENT

3 POTTER and BRUMFIELD TYPE KA14AY-24* OR EQUIVALENT

4 POTTER and BRUMFIELD TYPE KU17A11-24* OR EQUIVALENT

MORE THAN 4 USE COMBINATION OF RELAYS SPECIFIED ABOVE

NOTE: Current draw through thermostat contacts should not exceed 1 .0 amps.
*Special order, 100 piece minimum order.

Relay Designation

R1, R2, And R3

17

Heat Pumps and Energy Savings

• GE Zoneline® Heat Pumps are designed to provide
cost-efficient heat pump operation while monitoring
room conditions to maintain comfort.

The units employ a logic system monitoring both outdoor
and indoor temperatures to determine the heat source, thus
increasing energy savings by operating longer in the heat
pump mode.

Heat pumps save energy and cost less to operate than
units with electric resistance heaters as the only heat source.
Just as the EER of an air conditioner is an indication of the
efficiency of the unit, COP (Coefficient of Performance) is the
indication of the efficiency of the heat pump. This relative
efficiency of a heat pump compares the unit to electric
resistance heat. If a unit has a COP of 3.0, it means the
unit will produce three times as much heat at rating
conditions for the same electrical input wattage used
for electric resistance heat.

The compressor is used in heat pump operation just as
in air conditioning operation. In heat pump operation,
the hot refrigerant gas is directed to the indoor coil rather
than to the outdoor coil. Room air that circulates over the
indoor coil gains heat from the coil rather than losing heat
to the coil as during cooling operation.

As the outdoor temperature falls, the heat pump is able to
extract less heat from the outdoor air to raise the temperature
of the indoor air. For this reason, all packaged terminal heat
pumps also have electric resistance heaters as backup to heat
pump operation. At some point, the heat pump is unable to
provide sufficient heat to adequately warm the room. Many
Packaged Terminal Heat Pumps cease heat pump operation
and change to more expensive resistance heat at some
pre-determined outdoor temperature to compensate for
the inability of the heat pump to maintain room temperature.
This point, called the “switchover point,” is usually at an
outdoor temperature where savings from heat pump
operation may still be realized, if the unit is designed to
maintain room comfort at the lower outdoor temperatures.

Balance Point

An important consideration of the selection of a heat pump
unit is the “balance point” of the installation. Virtually every
room is unique — with different insulation — different sizes
and types of windows — different types of construction
— different directional exposures. All of these variables, as
well as geographical location, must be considered in order to
determine the balance point, the point at which the heat pump
is unable to produce enough heat to compensate for the heat
loss of the room or area being heated. For these reasons a
consulting engineer should be engaged to calculate the heat
loss and specify the heat pump unit required.

GE offers two series of Zoneline Heat Pump units — the
3800 Series with Standard Microprocessor controls and the
5800 Series with Highly Featured Microprocessor controls
— and both series react to the indoor temperature as well
as the outdoor temperature in determining the heat source
to provide comfortable room conditions and energy savings.
This determination of the heat source based on the indoor
temperature helps provide a more comfortable room.

18