Trane Axiom GEH Series Installation and operating instructions

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment
can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
May 2023 WSHP-SVX01AC-EN
Installation, Operation, and Maintenance
Water Source Heat Pump
Axiom™ Horizontal/Vertical —
GEH/V*
0.5 to 25 Tons, 50/60 Hz
Model Numbers:
GEHG 006-060 - 60 Hz
GEVG 006-060 - 60 Hz
GEHE 072-180 - 50/60 Hz
GEVE 072-300 - 50/60 Hz

©2023 Trane WSHP-SVX01AC-EN
Introduction
Read this manual thoroughly before operating or servicing
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
The three types of advisories are defined as follows:
WARNING
Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if
not avoided, could result in minor or moderate
injury. It could also be used to alert against unsafe
practices.
NOTICE
Indicates a situation that could result in equipment
or property-damage only accidents.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and Carbon
(HCFCs). Not all refrigerants containing these compounds
have the same potential impact to the environment. Trane
advocates the responsible handling of all refrigerants.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being
undertaken could result in death or serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical
hazards, MUST follow precautions in this manual and
on the tags, stickers, and labels, as well as the
instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/
sleeves, butyl gloves, safety glasses, hard hat/
bump cap, fall protection, electrical PPE and arc
flash clothing). ALWAYS refer to appropriate
Safety Data Sheets (SDS) and OSHA guidelines
for proper PPE.
• When working with or around hazardous
chemicals, ALWAYS refer to the appropriate
SDS and OSHA/GHS (Global Harmonized
System of Classification and Labelling of
Chemicals) guidelines for information on
allowable personal exposure levels, proper
respiratory protection and handling
instructions.
• If there is a risk of energized electrical contact,
arc, or flash, technicians MUST put on all PPE in
accordance with OSHA, NFPA 70E, or other
country-specific requirements for arc flash
protection, PRIOR to servicing the unit. NEVER
PERFORM ANY SWITCHING, DISCONNECTING,
OR VOLTAGE TESTING WITHOUT PROPER
ELECTRICAL PPE AND ARC FLASH CLOTHING.
ENSURE ELECTRICAL METERS AND
EQUIPMENT ARE PROPERLY RATED FOR
INTENDED VOLTAGE.

WSHP-SVX01AC-EN 3
WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work,
electrical, fall protection, lockout/tagout,
refrigerant handling, etc. Where local
regulations are more stringent than these
policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without written permission. Trane reserves the right to
revise this publication at any time, and to make changes to
its content without obligation to notify any person of such
revision or change.
Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.
Revision History
• Removed GEHE 006 to 060 data throughout the
document.
• Added Symbio™ 400-B/500 model throughout the
document.
• Updated the dimensional data diagrams and tables for
GEHE in the Unit Dimensions chapter.
• Updated the Electrical data tables and Wiring Diagram
chapter.
Introduction

4WSHP-SVX01AC-EN
Model Number Description . . . . . . . . . . . . . . . . . . . 6
GEV/GEH 006–060 Models . . . . . . . . . . . . . . . . . 7
Overview of Manual. . . . . . . . . . . . . . . . . . . . . . . . . . 8
Unit Nameplate. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Compressor Nameplate . . . . . . . . . . . . . . . . . . . . 8
Model Number Description . . . . . . . . . . . . . . . . . . 8
General Information . . . . . . . . . . . . . . . . . . . . . . . . . 9
Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Air-to-Refrigerant Coil . . . . . . . . . . . . . . . . . . . . . . 9
Water-to-Refrigerant Coil . . . . . . . . . . . . . . . . . . . 9
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
System Input Devices and Functions . . . . . . . . . 9
Deluxe 24V Controls (option) . . . . . . . . . . . . . . . 9
Symbio™ 400-B/500 or Tracer® UC400/
UC400-B (option) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pump Module (Field Installed
Accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Waterside Economizer (Option) . . . . . . . . . . . . . 9
Boilerless Control/Electric Heat
(Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supplemental or Boilerless Electric Heat
(Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hot Gas Reheat (Option) . . . . . . . . . . . . . . . . . . 10
2-Speed Blower Motor (Option) . . . . . . . . . . . . . 10
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Inspection Checklist. . . . . . . . . . . . . . . . . . . 12
Jobsite Inspection Checklist . . . . . . . . . . . . . . . . 12
Jobsite Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service Clearances . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . 16
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Weight Distribution for Hanging the GEH
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
General Installation Checks . . . . . . . . . . . . . . . . 47
Main Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Electric Heat Requirements . . . . . . . . . . . . . . . . 47
Low Voltage Wiring (AC)
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Filter Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Supply-Air Ductwork . . . . . . . . . . . . . . . . . . . . . . 48
Return-Air Ductwork . . . . . . . . . . . . . . . . . . . . . . 48
Ducted Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Ducted Filter Rack (0.5 to 5 tons only) . . . . . . . 49
Sound Attenuation Pad . . . . . . . . . . . . . . . . . . . . 50
Hanging the Horizontal Unit . . . . . . . . . . . . . . . . 50
Condensate Drain Connection. . . . . . . . . . . . . . 50
Supply Pipe Connections . . . . . . . . . . . . . . . . . . 51
Cleaning and Flushing the Water Loop. . . . . . . 51
Field Installed Power Wiring. . . . . . . . . . . . . . . . 51
Main Unit Power Wiring. . . . . . . . . . . . . . . . . . . . 51
Control Power Transformer . . . . . . . . . . . . . . . . 52
Thermostat Location . . . . . . . . . . . . . . . . . . . . . . 52
Thermostats and Zone Sensors . . . . . . . . . 53
Controls Using 24 Vac . . . . . . . . . . . . . . . . . . . . . 56
External Smoke Detection Wiring to
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Deluxe Controller . . . . . . . . . . . . . . . . . . . . . 58
Symbio™ 400-B/500 or UC400-B
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Airflow Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 59
GEV/H 0.5 to 5 tons - Units with Deluxe
24V controls. . . . . . . . . . . . . . . . . . . . . . . . . . 59
Waterside Economizer Installation . . . . . . . . . . 60
Waterside Economizer Installation for
Horizontal 0.5 to 5 Ton Units . . . . . . . . . . . . 60
Waterside Economizer Installation for
Vertical 0.5 to 5 Ton Units . . . . . . . . . . . . . . 61
Waterside Economizer Installation for
GEH and GEV 6 to 25 Ton Models. . . . . . . 63
Waterside Economizer Start-Up
Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Pre-Start Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table of Contents

WSHP-SVX01AC-EN 5
Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Initial Unit Start-Up. . . . . . . . . . . . . . . . . . . . . . . . 82
Start-Up Checklist and Log. . . . . . . . . . . . . . . . . 82
Operating Pressures . . . . . . . . . . . . . . . . . . . . . . 82
Water Pressure Drop. . . . . . . . . . . . . . . . . . . . . . 91
Water Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Preventative Maintenance . . . . . . . . . . . . . . . . . 93
Condensate Trap . . . . . . . . . . . . . . . . . . . . . . . . . 94
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Deluxe Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Warranty Information . . . . . . . . . . . . . . . . . . . . . . 102
Standard Warranty. . . . . . . . . . . . . . . . . . . . . . . 102
Extended Warranty . . . . . . . . . . . . . . . . . . . . . . 102
Table of Contents

6WSHP-SVX01AC-EN
Model Number Description
Digits 1–3 — Unit Configuration
GEH = Standard Efficiency Horizontal 6 to 15 Tons
GEV = Standard Efficiency Vertical 6 to 25 Tons
Digit 4 — Development Sequence
E= R-410A
Digits 5–7 — Nominal Capacity
072 = 6 Tons
090 = 7.5 Tons
120 = 10 Tons
150 = 12.5 Tons
180 = 15 Tons
240 = 20 Tons
300 = 25 Tons
Digit 8 — Voltage (Volts/Hz/Phase)
1= 208/60/1
2= 230/60/1
3= 208/60/3
4= 460/60/3
5= 575/60/3
6= 220–240/50/1
8= 230/60/3
9= 380–415/50/3
Digit 9 — Heat Exchanger
1= Copper-Water Coil
2= Cupro-Nickel Water Coil
7= Insulated Copper-Water Coil
8= Insulated Cupro-Nickel Water Coil
Digit 10 — Current Design Sequence
Digit 11 — Refrigeration Circuit
0= Heating and Cooling Circuit
2= Heating and Cooling Circuit with Hot Gas
Reheat
3= Heating and Cooling Circuit with Waterside
Economizer
4= Heating and Cooling Circuit with HGR and
WSE
Digit 12 — Blower Configuration
A= Drive Package A
B= Drive Package B
C= Drive Package C
D= Drive Package D
E= Drive Package E
F= Drive Package F
G= Drive Package G
H= Drive Package H
J= Drive Package J
1* = 2 Speed Drive Package A
2* = 2 Speed Drive Package B
3= 2 Speed Drive Package C
4= 2 Speed Drive Package D
5= 2 Speed Drive Package E
6= 2 Speed Drive Package F
7= 2 Speed Drive Package G
8= 2 Speed Drive Package H
9= 2 Speed Drive Package J
Digit 13 — Freeze Protection1
A= 20°F Freezestat (For Glycol loop)
B= 35°F Freezestat (For Water loop)
Digit 14 — Open Digit = 0
Digit 15 — Supply-Air Arrangement
B= Back Supply-Air Arrangement
F= Front Supply-Air Arrangement
L= Left Supply-Air Arrangement
R= Right Supply-Air Arrangement
T= Top Supply-Air Arrangement2
Digit 16 — Return-Air Arrangement
B= Back Return-Air Arrangement
F= Front Return-Air Arrangement
L= Left Return-Air Arrangement
R= Right Return-Air Arrangement
Digit 17 — Control Types
D= Deluxe 24V Controls
F= Symbio™ 500/UC400
G= Symbio 500/UC400 w/Wireless Comm
Digit 18 — Tstat/Sensor Location
0= Wall Mounted Location
Digit 19 — Fault Sensors
1= Condensate Overflow Sensor
3= Condensate Overflow and Filter Maintenance
Timer
6= Condensate Overflow and Fan Status
J= Fan Status, Filter Maintenance Timer and
Condensate Overflow Sensor
Digit 20 — Temperature Sensor
0= No Temperature Sensor
1= Entering Water Sensor
Digit 21 — Insulation
1= Standard Fiberglass Insulation
Digit 22 — Electric Heat
0= No Electric Heat
4= External Boilerless Electric Heat
5= External Supplemental Electric Heat
Digit 23 — ON/OFF Switch
0= No ON/OFF Switch
1=ON/OFF Switch3
Digit 24 — Filter Type
1= 1–inch Throwaway Filter
2= 2–inch Throwaway Filter
4= 2–inch MERV 8
5= 2–inch MERV 13
Digit 25 — Acoustic Arrangement
0= Enhanced Sound Attenuation
Digits 26–34 — Does Not Apply to GEH or
GEV
00000000000 = Digits 26-36 are not applicable to
the GEH or GEV products
Digits 35 — Unit Drain Pan Option
A= Polymer Drain Pan
B= Stainless Steel Drain Pan
Model Number Notes
Notes:
1. 20°F Freezestat is typically used in a
geothermal application. 35°F Freezestat is
typically used in a boiler/tower application.
2. Only available on vertical units
3. ON/OFF switch not available with boilerless
electric heat option or units over 60 amps

WSHP-SVX01AC-EN 7
GEV/GEH 006–060 Models
Digits 1–3 — Unit Configuration
GEH = Standard Efficiency Horizontal
GEV = Standard Efficiency Vertical
Digit 4 — Development Sequence
G
Digits 5–7 — Nominal Size (MBh)
006 = 6.0 MBh
009 = 9.0 MBh
012 = 12.0 MBh
015 = 15.0 MBh
018 = 18.0 MBh
024 = 24.0 MBh
030 = 30.0 MBh
036 = 36.0 MBh
042 = 42.0 MBh
048 = 48.0 MBh
060 = 60.0 MBh
Digit 8 — Voltage (Volts/Hz/Phase)
4= 460/60/3
7= 265/60/1
A= 208-230/60/1
B= 208-230/60/3
Digit 9 — Heat Exchanger
1= Copper-Water Coil
2= Cupro-Nickel Water Coil
7= Insulated Copper-Water Coil/Suction Line
8= Insulated Cupro-Nickel Water Coil/Suction Line
Digit 10 — Design Sequence
AFirst Design Sequence
Digit 11 — Refrigeration Circuit
0= Heating and Cooling Circuit
2= Heating and Cooling Circuit with Hot Gas
Reheat
3= Heating and Cooling Circuit with Waterside
Economizer
4= Heating and Cooling Circuit with Waterside
Economizer, Hot Gas Reheat
Digit 12 — Blower Configuration
K= Variable ECM Motor, Constant Torque
Digit 13 — Freeze Protection2
A= 20°F Freezestat (For Glycol loop)
B= 35°F Freezestat (For Water loop)
Digit 14 — Open Digit = 0
Digit 15 — Supply-Air Arrangement
T= Top Supply-Air Arrangement
B= Back Supply-Air Arrangement
L= Left Supply-Air Arrangement
R= Right Supply-Air Arrangement
Digit 16 — Return-Air Arrangement
L= Left Return-Air Arrangement
R= Right Return-Air Arrangement
Digit 17 — Control Types
D= Deluxe 24V Controls
H= Symbio 400-B or UC400/UC400-B
J= Symbio 400-B/UC400-B w/Air-Fi® Wireless
Communications
Digit 18 — Tstat/Sensor Location
0= Wall Mounted Location
Digit 19 — Fault Sensors
1= Condensate Overflow Sensor
3= Condensate Overflow and Filter Maintenance
Timer
6= Condensate Overflow and Fan Status
J= Fan Status, Filter Maintenance Timer and
Condensate Overflow Sensor
Digit 20 — Temperature Sensor
0= No Additional Temperature Sensor
1= Entering Water Sensor
Digit 21 — Insulation
1= Matte Faced Insulation
2= Foil Faced Insulation
Digit 22 — Electric Heat Option
0= No Electric Heat
6= Field Mounted External Boilerless LOW Electric
Heat
7= Field Mounted External Boilerless MED Electric
Heat
8= Field Mounted External Boilerless HIGH
Electric Heat
9= Boilerless Electric Heat Ready
Digit 23 — Unit Mounted Disconnect
0= No Unit Mounted Disconnect
2= Unit Mounted Disconnect
Digit 24 — Filter Type
1= 1-inch Throwaway Filter
2= 2-inch Throwaway Filter
4= 2-inch MERV 8
5= 2-inch MERV 13
Digit 25 — Acoustic Arrangement
1= Standard Sound Attenuation
2= Deluxe Sound Attenuation
Digits 26–36 — Does Not Apply
00000000000 = Digits 26-36 are not applicable to
the GEH or GEV products
Digit 37 — Ducted Filter Rack
0= Non-ducted Filter Rack
A= Ducted Filter Rack (Side Access/LH—RH)
C= Ducted Filter Rack (Bottom Access)
Digit 38 — Isolation Valve
0= No Isolation Valve
1= Factory Mounted Isolation Valve
Digit 39 — Power Connection
1= Single Point
2= Electric Heat Power Separate from Unit
Digit 40 — Drain Pan
A= Polymer Drain Pan
B= Stainless Steel Drain Pan
Model Number Note:
Notes:
1. Deluxe Sound option to be made available in
later product release.
2. 20°F Freezestat is typically used in a
geothermal application. 35°F Freezestat is
typically used in a boiler/tower application.
Model Number Description

8WSHP-SVX01AC-EN
Overview of Manual
Note: One copy of this document ships inside the control
panel of each unit and is customer property. It must
be retained by the unit’s maintenance personnel.
This booklet describes proper installation, operation, and
maintenance procedures for air cooled systems.
By carefully reviewing the information within this manual
and following the instructions, the risk of improper
operation and/or component damage will be minimized.
It is important that periodic maintenance be performed to
help assure trouble free operation. A maintenance
schedule is provided at the end of this manual.
Should equipment failure occur, contact a qualified service
organization with qualified, experienced HVAC technicians
to properly diagnose and repair this equipment.
Unit Nameplate
The unit nameplate is located on the outside of the control
box access panel at the front of the unit. It includes the unit
model number, serial number, electrical characteristics,
refrigerant charge, and other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors are located on the
compressor shell.
Model Number Description
All products are identified by a multiple-character model
number that precisely identifies a particular type of unit. Its
use will enable the owner/operator, installing contractors,
and service engineers to define the operation, specific
components, and other options for any specific unit.
When ordering replacement parts or requesting service, be
sure to refer to the specific model number and serial
number printed on the unit nameplate.

WSHP-SVX01AC-EN 9
General Information
Unit Description
Before shipment, each unit is leak tested, dehydrated,
charged with refrigerant and run tested for proper control
operation.
Air-to-Refrigerant Coil
The air-to-refrigerant coil is aluminum fin, mechanically
bonded to the copper tubing.
Water-to-Refrigerant Coil
The water-to-refrigerant coil is a copper or cupro-nickel
(option) and steel tube (tube-within-a-tube) design, leak
tested to assure there is no cross leakage between the
water tube (copper/cupro-nickel) and refrigerant gas (steel
tube).
Table 1. High/low pressure switch
Trip Recover Unit
LP 40 +/-4 56 +/-4 psig
HP 650 +/-10 550 +/-10 psig
Controls
The available control type is a Deluxe 24V control option, a
LonTalk® certified control option or Symbio™ 400-B/500 or
Tracer® UC400/UC400-B BACnet® control option for all
unit sizes.
All power wiring to the equipment is made at the unit’s
compressor contactor or the optional disconnect switch for
GEH/V 0.5 to 5 ton. For units without the disconnect switch,
the power wiring needs to be connected to the screw
terminals of the compressor contactor. For the GEH/V 6 to
25 tons units all power wiring is made to the high voltage
terminal block. All low-voltage wiring is made at the unit’s
low voltage terminal board or terminal plug.
System Input Devices and
Functions
A thermostat, zone sensor, or building automation system
is required to operate the water-source heat pump. The
flexibility of having several mode capabilities depends upon
the type of sensor and/or remote panel selected.
Troubleshooting and connection diagrams for the 24V
control systems may be located in the back of this manual.
All digital control troubleshooting tips and connection
diagrams are located in BAS-SVX065*-EN (UC400/UC400-
B) and BAS-SVX092*-EN (Symbio™ 400-B/500).
Deluxe 24V Controls (option)
Units containing the Deluxe 24V control design will
incorporate a microprocessor-based control board. The
Trane microprocessor board is factory wired to a terminal
strip or terminal plug to provide all necessary terminals for
field connection. The deluxe board is equipped with a
random start relay, anti-short cycle timer, brown out
protection, compressor disable, condensate overflow, unit
safety control, diagnostics, and a generic relay (which may
be available for field use).
Symbio™ 400-B/500 or Tracer®
UC400/UC400-B (option)
The Symbio 400-B/500 or UC400/UC400-B is a BTL Listed
BACnet® controller that can operate stand- alone or within
a Building Automation System (BAS) such as Tracer® SC
+. For installation, operation, and maintenance, see BAS-
SVX065*-EN (UC400/UC400-B) and BAS-SVX092*-EN
(Symbio 400-B/500).
Pump Module (Field Installed
Accessory)
The pump module shall consist of either a single or dual 1/6
HP bronze pump and a brass three-way shut-off valve.
Cast iron pumps are also available. The pump module kits
shall contain the necessary components for the installation,
operation and maintenance of the water circuit of a closed-
loop distributed pumping application.
Waterside Economizer (Option)
Instructions for mechanical connection of the waterside
economizer to the water-source heat pump may be found
in the dimensional section of this manual.
The waterside economizer is designed to begin
economizing mode when water temperatures fall below the
field adjustable temperature of 25, 35, 45, 55 or 60°F (for
the Deluxe control option), or below the programmed set-
point (for the Symbio™ 400-B/500 or UC400/UC400-B
control option).
When the temperature is less than the setpoint, fluid will
flow into the economizing coil, while simultaneously halting
mechanical operation of the compressor. Mechanical
cooling will continue on a call for a second stage from the
thermostat or system control. Entering water temperature
sensor is factory provided for field installation on the
entering water side of the coil.
Boilerless Control/Electric Heat
(Option)
This option targets building designs that do not incorporate
a boiler to heat the loop system. During a heavy heating

10 WSHP-SVX01AC-EN
load, the loop temperature may begin to fall. As the loop
temperature decreases, the heating capacity of the heat
pump will also decrease. In the heating mode, when the
loop temperature falls below 55°F (factory setting), the
electric heater is energized, and the compressor is locked
out. The system’s electric heat source will continue to be
utilized for primary heating until the loop temperature rises
above 60°F. Once the loop temperature rises above 60°F,
the boilerless controller returns the unit to normal
compressor heating operation and locks out the electric
heater.
For the 0.5-5 GEV/H models, the electric heat will be field
installed by the contractor.
For the GEH/V 6 to 25 ton units, the electric heat must be
field installed by the contractor.
Note: The boilerless controller has a field adjustable
entering water temperature setting of 25, 35, 45, 55,
and 60 degrees. The compressor operation will
return to normal operation when the loop
temperature rises 5 degrees above the setpoint.
This electric heat option is designed for primary heat
only, not to run as supplemental heat to the heating
function of the heat pump.
Supplemental or Boilerless
Electric Heat (Option)
Only available on GEHE/GEVE 6 to 25 ton units.
Supplemental heat will turn on automatically when heat
pump cannot provide sufficient heat to meet the heating
load. The electric heat will be energized to supplement the
heating provided by the heat pump. The heater for this
model shall be external to the equipment. For the GEH/V 6
to 25 ton units, the electric heat must be field installed by
the contractor.
Hot Gas Reheat (Option)
With the reheat option, the return-air from the space is
conditioned by the air-to-refrigerant coil, then reheated by
the reheat coil to control not only the space temperature,
but to also reduce the relative humidity of the space. When
operating in the reheat mode (meaning the sensible
temperature has been met in the space), the humidistat
signals the reheat relay coil to energize, allowing the high
pressure refrigerant gas to flow from the compressor
through the reheat valve, into the reversing valve and
reheat coil.
A switching relay has been provided for the reheat
application to adjust the blower motor from normal
operation to low speed when the hot gas reheat is
energized (for 0.5 to 5 ton equipment only).
Note: Units containing the hot gas reheat option should not
be used as a make-up air unit.
2-Speed Blower Motor (Option)
The 6 to 25 ton GEH/V models have indoor blowers that
are available with 2 speed motors, selectable in the model
number (Digit 12, drive packages one to nine). High speed
airflow matches the single speed motor airflow, referenced
in the Fan Performance tables. Low fan speed airflow is
approximately 50% of high fan speed airflow.
The 6 to 25 ton GEH/V two-speed blower motors are
available with the following options: Deluxe 24V or
Symbio™ 500/UC400 controls, Heat Pump (HP) or HP w/
Hot Gas Reheat or HP w/Waterside Economizer. Not
available with Boilerless or Supplemental Electric Heat.
Table 2. 6 to 25 ton GEH/V fan speed for two-speed
drive packages one to nine
RV State Fan
Compres-
sor 1
Compres-
sor 2
Fan
Speed
Heat OFF OFF OFF OFF
Heat ON OFF OFF LOW
Heat ON ON OFF HIGH
Heat ON ON ON HIGH
Cool OFF OFF OFF OFF
Cool ON OFF OFF LOW
Cool ON ON OFF LOW
Cool ON ON ON HIGH
Table 3. Refrigerant charge
Model (60
HZ) Heat Pump (oz)/(Kg) Heat Pump with HGR (oz)/(Kg)
Circuit 1 Circuit 2 Circuit 1 Circuit 2
GEH/V006 30.5 /
0.865
——— 31.5/0.893 ———
GEH/V009 31.0 /
0.879
——— 32.0 / 0.907 ———
GEH/V012 30.5 /
0.865
——— 31.5 / 0.893 ———
GEH/V015 37.5 /
1.063
——— 39.0 / 1.106 ———
GEH/V018 37.5 /
1.063
——— 39.0 / 1.106 ———
GEH/V024 47.0 /
1.332
——— 4.9.0 / 1.389 ———
GEH/V030 45.0 /
1.276
——— 47.0 / 1.332 ———
GEH/V036 50.0 /
1.417
——— 52.5 / 1.488 ———
GEH/V042 63.0 /
1.786
——— 65.0 / 1.843 ———
GEH/V048 67.0 /
1.899
——— 70.5 / 1.999 ———
GEH/V060 77.0 /
2.183
——— 80.5 / 2.282 ———
General Information