Laarsen Associates VW, PW, IW warranty Table Of Contents

Page 2 LAARS HEATING SYSTEMS

TABLE OF CONTENTS

SECTION 1.
General Information
1A.	Introduction	3
1B.	Heater Identification	3
1C.	Flow Requirements	4
1D.	Water Chemistry	4
SECTION 2.
Installation
2A.	Heater Placement	4
2B.	Installation of Indoor Heaters	4
2B-1.	Combustion Air Supply	6
2B-2.	Venting	6
2C.	Installation of Outdoor Heaters	7
2D.	Gas Supply and Piping	7
2E.	Electrical Wiring	8
2F.	Water Piping of System	8
2G.	Water Expansion	9
2H.	Pump Performance and Installation	10
2I.	Water Pressure	16
2J.	Tank Installation	16
2K.	Two-Temperature System	16
SECTION 3.
Operation
3A.	Controls - General	16
3B.	Initial Start-Up	17

3C.	To Start Up System	18
3D.	To Turn Off Heater	19
3E.	To Shut Down System	19
SECTION 4.
Maintenance
	...................................................................	19

SECTION 5.

Troubleshooting and Analysis of

Service Problems

................................................................... 20

SECTION 6.

Parts Descriptions and Order Numbers

................................................................... 22

SECTION 7.

Outdoor Parts Descriptions and

Order Numbers

................................................................... 30

SECTION 8.

Optional Parts Descriptions and

Order Numbers

................................................................... 32