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Airmark GFT Series User Manual

Airmark GFT Series
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IO-123163 Effective 01-14-2016
1
INSTALLATION GUIDE
1. Safety Instruction
!
WARNING
Potential safety hazards are alerted using the following symbols. The symbol is used in conjunction with terms
that indicate the intensity of the hazard.
This symbol indicates a potentially hazardous situation, which if not avoided,
could result in serious injury, property damage, product damage or death.
Certied technicians or those individuals
meeting the requirements specied by
NATE may use this information. Property
and product damage or personal injury hazard may occur
without such background.
Disconnect ALL power sources prior to
servicing. Failure to do so may cause
personal injury or property damage.
Product designed and manufactured
to permit installation in accordance
with local and national building codes.
It is the installers responsibility to ensure that product is
installed in strict compliance with national and local codes.
Manufacturer takes no responsibility for damage (personal,
product or property) caused due to installations violating
regulations. In absence of local/state codes, refer to National
Electric Code: NFPA 90A & 90B Uniform Mechanical Code.
When this unit is installed in an enclosed
area, such as a garage or utility room with
any Carbon Monoxide producing devices
(i.e. automobile, space heater, water heater etc.) ensure that
the enclosed area is properly ventilated.
The unit is designed for operation with
120V, single phase, 60 Hz power supply.
Aspen will not be responsible for
damages caused due to modication of the unit to operate
with alternative power sources.
Unit is not approved for outdoor
installations.
This symbol indicates a potentially hazardous situation, which if not avoided,
may result in moderate injury or property damage.
Only factory authorized kits and
accessories should be used when
installing or modifying this unit unless it is
so noted in these instructions. Some localities may require
a licensed installer/service personnel.
CAUTION
!
CAUTION
!
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
!
WARNING
GFT/GFS Series - Cased/Uncased
Ceiling Mount Hydronic Heat Dx Cool
Air Handler
2. Introduction
The GFS/T Series air handlers are versatile horizontal ceiling mount
units. These air handlers have the following standard features:
Louvered ceiling access panel has separate frame that attaches to
ceiling joists. Solid access panel available for use with end return
installations. Compatible with most brands of air conditioners or heat
pumps.
I. Application Versatility
II. Motor
Constant torque EC motor allows motor speed control with embedded
software. Blowers are mounted on a plate so they can be easily
removed for service.
III. Cabinet (GFT Only)
Sturdy, fully insulated galvanized steel cabinet with painted front
panels. Knockout for duct return.
IV. Electronic Circuit Board
Electronic circuit board provides 30 secs ON/OFF blower time delay,
extracting more heat/cool from the coil.
V. DX Coil
High efciency ried copper tubes/enhanced aluminum ns provide
maximum heat transfer. All coils immersion tested at 500 psi then
nitrogen pressurized and factory sealed for maximum reliability.
Liquid-line Schrader allows pre-installation pressure testing.
Available with either orice or TXV metering device. Field-installable
bolt-on TXVs are also available. Primary & secondary condensate
drain. All drain connections are 3/4” MPT. Access door allows for coil
cleaning. Certied for use with either R22 or R410a.
VI. Warranty
One year limited parts warranty.
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Airmark GFT Series Specifications

General IconGeneral
Heat OutputVaries by model
IgnitionElectric ignition
Voltage120V
Power SupplyElectric
Power ConsumptionVaries by model
ThermostatYes
Safety FeaturesOverheat protection
DimensionsVaries by model
WeightVaries by model

Summary

Safety Information

Hazard Symbols and Warnings

Explains hazard symbols (WARNING, CAUTION) and their meanings.

Installation Safety Practices

Covers technician qualifications, power disconnection, code compliance, and ventilation.

Unit Limitations and Power

Notes restrictions on outdoor use and specifies power supply requirements.

Pre-Installation Procedures

Condensate Drain System Setup

Details primary/secondary drain setup, trap requirements, and connection methods.

Unit Installation and Mounting

Coil Installation Precautions

Covers coil sizing, pre-charge release, Schrader valve protection, and cleaning.

Flowrator Coil Installation Steps

Piston Sizing and Replacement

Guidance on selecting and replacing flowrator pistons based on capacity.

Flowrator Disassembly and Assembly

Step-by-step instructions for disassembling, cleaning, and reassembling flowrators.

TXV Coil Installation Procedures

TXV Bulb Mounting Guidelines

Instructions for horizontal and vertical mounting of the TXV sensing bulb.

TXV Bulb Placement Criteria

Key criteria for proper TXV sensing bulb contact, orientation, and insulation.

Field-Installed TXV Retrofit

Valve Compatibility and Sizing

Ensuring TXV compatibility with refrigerant and proper valve sizing.

Refrigerant Line Connections

Nitrogen Charging and Leak Check

Procedures for nitrogen charging, leak detection, and system evacuation.

Electrical Installation Overview

Wiring Requirements and Connections

Covers power supply, wire selection, and connection for copper/aluminum wiring.

System Charging Procedures

Flowrator Coil Refrigerant Charge

Adding refrigerant for flowrator coils based on superheat.

Expansion Valve Coil Refrigerant Charge

Adding refrigerant for TXV coils based on subcooling.

Start-Up and System Purging

System Start-Up Steps

Steps for purging air, igniting water heater, and setting thermostat.

Troubleshooting and Final Checkout

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