Later Design Sequence
Models
With 3-DTMScroll Compressors
Literature Change History
Overview of Manual
Table of Contents
General Information
Model Number Description
Digit 3 Unit Airflow
General Information Commonly Used Acronyms
Fiberglass Wool
Hazard Identification
Unit Description
General Information
Supply AIR
Ventilation Control Module VCM Design special option only
CFM
Lead-Lag
Constant Volume CV Units
Variable Air Volume VAV Units
Unit Component Layout and Shipwith Locations
General Information Space Temperature Averaging
Control Module Locations for SHF 40, 60, 70 & 75 Ton Units
Table of Contents
Unit Inspection As soon as the unit arrives at the job site
Unit Dimensions & Weight Information
No Step Surface
Storage
Page
Sahf Cooling-Only Units 20 thru 75 Ton
Unit Base Dimensional Data Dimensions
Installation
Unit Dimensional Data Dimensions Size
Electrical Entrance Data Unit Dimensions
SEHF, SFHF, SLHF, SSHF, Sxhf Units 20 thru 75 Ton
Electrical Entrance Data Unit Dimensions Size
Unit Base Dimensional Data Dimensions Size
Unit Dimensions Size
Unit Size Furnace Dimensions Note Size/MBH Length Height
SHG Cooling & Heating Units 90 through 130 Ton
Slhf
Sahf
Sehf
Sshf
SE,SL
Roof Curb and Ductwork
Sahf Sshf Sfhf Sxhf Sehg Sfhg Sxhg HF/G
Heavy Objects
Installation Unit Rigging & Placement
If a Trane Curb Accessory Kit is not used
Pitch Pocket Location
Typical Unit Rigging Unit Base & Roof Curb Section
General Unit Requirements
Main Electrical Power Requirements
Installation Field Installed Control Wiring
Requirements for Electric Heat Units
Installation
Condensate Drain Connections
Page
Removing Supply and Exhaust Fan Shipping Channels Motors 5Hp
Page
Installation Sensor & Tubing Installation
Units with StatitracTM
Hazardous Gases and Flammable Vapors
Connecting the Gas Supply Line to the Furnace Gas Train
Gas Heat Units SFH
350 MBH 850 MBH
1000 MBH Modulating 500 MBH 1000 MBH
Flue Assembly Installation
Flue Assembly
Hot Water Heat Units SLH
Steam Heat Units SSH
SSHG-90
Through 130 Ton units
Page
Live Electrical Components
Hazardous Voltage
Use Copper Conductors Only
Typical Field Power Wiring 20 thru 75 Ton
Page
Exhaust Fan Motor
Supply Fan Motor FLA ea Horsepower
Condenser Fans Total FLA
FLA
Blower Motor Sfhf Only
Combustion
Unit Tonnage No. of Compressors Tonnage Type Designation
= Current of the Largest Motor Compressor or FAN Motor
Single Source Power 380V, 415V, 460V,
Load Definitions Load
On the Next
Dual Source Power units 200V
Power Wire Sizing and Protection Device Equations
Disconnect Switch Sizing DSS
MCA = 1.25 x Load MOP = 1.25 x Load
Installation Controls using DC Analog Input/Outputs
Controls using 24 VAC
Constant Volume System Controls
Variable Air Volume System Controls
Constant Volume or Variable Air Volume System Controls
Pressurize
Depressurize
Purge
Fire
Refer to Wiring Notes on
16A
16B
Page
17A
17B
VAV Setpoint
Input Voltage
Table of Contents
Cooling Sequence of Operation
Sequence of Operation
Unit Start-Up
Gas Heating Sequence of Operation
Fenwal Ignition System
Propane Gas
Flame Failure
Modulating Gas Sequence of Operation
Full and Limited Modulating Gas Furnace
Unit Start-Up Wet Heat Sequence of Operation
Electric Heat Sequence of Operation
Freeze Protection
Compressor Damage
Unit Power
Electrical Phasing
Voltage Supply
Voltage Supply and Voltage Imbalance
Voltage Imbalance
Service Test Guide for Component Operation
IGV
Supply FAN
Verifying Proper Fan Rotation
System Airflow Measurements Constant Volume Systems
Rotating Components
If all of the fans are rotating backwards
Condenser Fan Location with Human Interface Designator
Variable Air Volume Systems
Optional with all Units
Exhaust Airflow Measurement
TraqTM Sensor Airflow Measurement
Optional with all units equipped with an economizer
20 & 25 Ton Supply Fan Performance without Inlet Guide Vanes
Ton Supply Fan Performance without Inlet Guide Vanes
Wocfm 1200 RPM 40 HP 40%
300 RP
Standard Evaporator Coil
20000 30000 40000 50000 60000
Drop
20 & 25 Ton Supply Fan Performance with Inlet Guide Vanes
Ton Supply Fan Performance with Inlet Guide Vanes
15 HP 900 RPM 80% 10 HP
RPM
Through 75 Ton Component Static Pressure Drops Inches W.C
AIR
AIR
STD
CFM RPM BHP
10,000
HF-C20 000
HF-C25 000
HF-C30 000
RPM BHP BHP RPM BHP RPM BHP
AIR RPM BHP
Exhaust Air Dampers
Economizer Damper Adjustment
To Adjust the Fresh Air Damper Travel
Fresh Air & Return Air Damper Operation
Configuration
Damper Travel Adjustment Position
Connecting Rod Crank Arm Hole
Ton Units
All Systems
Fresh Air & Return Air Linkage Adjustment
Compressor Start-Up
70 & 105 Ton
At Shutdown
Compressor Operational Sounds
Refrigerant Charging
At Low Ambient Start-Up
Compressor Locations
Cooling Cycle Pressure Curve
340 320
Full Load
380 360 340 OD Ambient
Full Load
380 360 340 OD Ambient 320
240 220
380 360 OD Ambient
Charging by Subcooling
Thermostatic Expansion Valves
Low Ambient Dampers
Electric, Steam and Hot Water Start-Up
Gas Furnace Start-Up
Low-Fire Adjustment 500 MBH, 850 & 1,000 MBH only
High-Fire Adjustment
Combustion Air Adjustment O2
Two Stage Gas Furnace
Firing Manifold
MBH
CO2 Pressure
Heat Exchanger
Full Modulating Gas Furnace
Unit control
Modulating Gas Regulator
Limited Modulating Gas Furnace Unit Start-Up
Modulating Gas Regulator Legend
Unit Start-Up Final Unit Checkout
Typical Gas Furnace
Service & Maintenance
Service & Maintenance
Unit Internal Fuse Replacement Data & VFD Factory Settings
Wet Heat Coil Fin Data Total Coil Fins
Unit Model Box-type Note Qty
Qty Size of each
Model Type
Service & Maintenance
Fan Belt Adjustment
Suction Line Filter/Drier Installation
Scroll Compressor Replacement
Gripbelts Gripnotch Cross Small P.D Section Range Min Max
VFD Programming Parameters
Hazardous Voltage! w/Capacitors
Supply and Exhaust Fan VFD Programming Parameters
Filters
Service & Maintenance Monthly Maintenance
Cooling Season
Coil Cleaning
Heating Season
Contains Refrigerant
Coil Cleaners
Steam or Hot Water Coils
Final Process
Index
See Figure Gate type valve 36-37 See -12 Figure
See VOM Contacts -16 Figure
Warranty and Liability Clause
Equipment Damage From Ultraviolet UV Lights
115
116