Crestron electronic 3.5, 2.5, 1.5 service manual Contents

Contents

HAZARD DEFINITIONS	2	5. HYDRONIC PIPING
PLEASE READ BEFORE PROCEEDING	3	System Water Piping Methods	24
THE CREST -- HOW IT WORKS	4-5	Low Water Cutoff Device	24
RATINGS	6	Chilled Water System	24
1. DETERMINE BOILER LOCATION		Freeze Protection	24
Clearances	7	General Piping Information	24
Provide Air Openings to Room	8	Circulator Sizing	25
Flooring and Foundation	8	Near Boiler Piping Components	26-30
Vent and Air Piping	8	6. GAS CONNECTIONS
Prevent Combustion Air Contamination	8	Connecting Gas Supply Piping	31
Using an Existing Vent System to Install a New Boiler	..... 9	Natural Gas	32
Corrosive Contaminants and Sources	9	Pipe Sizing for Natural Gas	32
Removing a Boiler from Existing Common Vent	10	Natural Gas Supply Pressure Requirements	............. 32
Remove Boiler from Wood Pallet	11	Propane Gas	32
Combustion and Ventilation Air Requirements	12-13	Pipe Sizing for Propane Gas	32
2. GENERAL VENTING		Propane Supply Pressure Requirements	32
Direct Venting Options - Sidewall Vent	14	Check Inlet Gas Supply	33-34
Direct Venting Options - Vertical Vent	14	Gas Pressure	34
Direct Venting Options - Vert. Vent, Opt. Rm Air	14	Gas Valve Replacement	34
Direct Venting Options - Vert. Vent, Sidewall Air	14	7. FIELD WIRING
Install Vent and Combustion Air Piping	15	Line Voltage Connections	35
Air Inlet Pipe Materials	15	Low Voltage Connections	36
Requirements for Installation in Canada	15	Wiring of the Cascade	37
Vent and Air Piping	16	8. CONDENSATE DISPOSAL
Air Intake / Vent Connections	16	Condensate Drain	39
Min./Max. Combustion Air & Vent Piping Lengths	17	9. STARTUP	40-45
Vent and Air Piping	17	10. OPERATING INFORMATION
Common Venting	18	General	46-48
3. VERTICAL DIRECT VENTING		Cascade	49
Vent/Air Termination - Vertical	19	Sequence of Operation	50
Determine Location	19	Status Screen	51
Prepare Roof Penetrations	19	Main Screen	52
Termination and Fittings	19-20	11. MAINTENANCE
Multiple Vent/Air Terminations	20	Maintenance & Annual Startup	53-57
4. SIDEWALL DIRECT VENTING		12. DIAGRAMS
Vent/Air Termination - Sidewall	21-23	Ladder Diagrams	58
Determine Location	21-23	Wiring Diagram	59
Prepare Wall Penetrations	22	Revision Notes	Back Cover
Termination and Fittings	22
Multiple Vent/Air Terminations	22-23
Room Air	23

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.

￿DANGER

￿WARNING

￿CAUTION CAUTION NOTICE

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

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, may result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but not related to personal injury or property damage.

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