MODEL GT SERIES
INSTALLATION, OPERATING AND MAINTENANCE MANUAL
Natural Or Propane 150,000 to 399,000 Btuh Input
gama ENERGY STAR
BEFORE YOU START
CONTENTS
BOILER RATINGS & CAPACITIES
High Altitude Operation
Figure 1- Input vs Elevation Graph
BOILER LOCATION
3.Un-pressurized,and gravity feed heating systems
4.Heating systems with very low pressures or flow
GENERAL VENTING GUIDELINES
COMBUSTION AIR
Service
Table 1 - Clearances
Figure 3- Vent Pipe To Boiler Attachment
HORIZONTAL DIRECT VENT SYSTEMS
Table 2 - Vent & Air Intake System Sizing
Number
Figure 5 - Horizontal Terminal Locations
Separate Air Intake and Vent Terminals
Figure 6 - Wall Penetration Detail
Figure 8 - Below Grade Installation
Figure 7 - Air Intake & Vent Pipe Attachment
Figure 9 - External Air Intake and Vent Systems
Figure 10 - Debris Screen Installation
Figure 12 - Vertical Concentric Terminal Location
Figure 14 - Debris Screen Installation
VERTICAL DIRECT VENT SYSTEMS
Figure 16 - Two Pipe Using Dormant Chimney
Figure 13 - Wall Penetration Detail
Figure 17 - Concentric Through the Roof
CONDENSATE DRAIN
Figure 18 - Multiple Concentric Through the Roof
Figure 19 - Condensate Piping
GENERAL PLUMBING GUIDELINES
Figure 20 - Relief Valve Piping
Pressure Relief Valve
PRIMARY LOOP PLUMBING
MULTIPLE BOILER PRIMARY LOOP
SECONDARY LOOP PLUMBING
Low Water Cut Off, LWCO
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Figure 24 - Multiple Boiler Installation
Figure 25 - Multiple Zones Using Circulators
Figure 26 - Multiple Zones Valves with Bypass Valve
Table 5 - Equivalent Pipe Length Chart
GAS SUPPLY PIPING
Figure 27 - Gas Supply Piping
Table 4 - Gas Pipe Capacity
Thermostat Installation
ELECTRICAL WIRING
Figure 28 - Basic Heating System Wiring
Multiple 4 Wire Zone Valves
Figure 30 - Multiple 4 Wire Zone Valves
GT INSTALLATION AND OPERATION INSTRUCTIONS
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GT INSTALLATION AND OPERATION INSTRUCTIONS
Models Taco SR504, Argo ARM 861 Series
Multiple Zone Pump Controller
Figure 33 - Boiler Ladder Diagram
GT INSTALLATION AND OPERATION INSTRUCTIONS
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Figure 34 - Boiler Connection Diagram
GT INSTALLATION AND OPERATION INSTRUCTIONS
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Figure 35 - Conventional Mode Operation Chart
SENTRY 2100T CONTROLLER
Figure 36 - Reset Mode Operation Chart
Figure 37 - 2100T Display Screen
Setting Sentry 2100T control
Figure 38 - Input Conversion Chart
Recommended Settings
Table 6 - Recommend System Temperatures
Figures 39 - Reset Curve For Res = 85 F, 29C
Determining Reset Temperature HICalc
Figures 40 - Reset Curve For Res = 70 F, 21C
=200F, 93C - 70F, 21C /70F, 21C
OPERATING INSTRUCTIONS
BOILER SET UP
Table 7 - Normal Flue Gas Composition
Natural Gas
Figure 41 - Gas Valve Layout, GT-150
Manifold Pressure Line Pressure Input Screw
Figure 42 - Gas Valve Layout, GT-400
Ignition System
Figure 43 - Operational Flow Chart
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
TO TURN OFF GAS TO APPLIANCE
Gas Pressure Adjustment
BOILER CHECKING & ADJUSTMENT
Figure 44 - Burner Flame Thermostat Adjustment
Input Rate
Heat Exchanger Cleaning
BOILER MAINTENANCE
Burner Removal & Replacement
Controls
Figure 47 - Air Inlet Pipe Installation
WALL HUNG CONVERSION
Aquastat High Limit
Figure 45 - Air Inlet Pipe Removal
Problem
TROUBLE SHOOTING
Detected Problem
Solution
Air Switch is Closed
Air Switch is Open
Indicates that the
Indicates that the
not activated when
Ignition Sequence
burner light is on
Fan is on and
the housing
residence. This is not a warranty issue
warranty issue
Sentry Controller
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GT INSTALLATION AND OPERATION INSTRUCTIONS
Part Number
REPLACEMENT PARTS LIST
Description
Part Number
Part Number
REPLACEMENT PARTS LIST
Description
Part Number
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GT INSTALLATION AND OPERATION INSTRUCTIONS
WESTCAST, INC
