TWO
COMMERCIAL BOILER WITH HORIZONTAL TANK
IMPORTANT
THE INSTALLATION OF SAFETY FLOW SWITCH AS SHOWN
IS REQUIRED TO PROTECT THE BOILER IN CASE OF WATER
SERVICE INTERRUPTION OR CIRCULATOR FAILURE.
+PIPING AND FITTINGS BETWEEN GATE VALVES AND BOILERS SHOULD BE BRASS OR BRONZE. OTHER PIPING SHOULD CONFORM TO LOCAL CODES.
GATE VALVES ARE SHOWN FOR SERVICING BOILER.
HOWEVER, LOCAL CODES SHALL GOVERN THEIR USAGE.
*PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM.
**INSTALL THERMOMETER AND PRESSURE RELIEF IN
OPENINGS PROVIDED ON
WIRING - FIGURES 21 to 27 on
pages 28 to 32.
INSTALL IN ACCORDANCE
WITH ALL LOCAL CODES
DANGER
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT
FIXTURES. SEE TANK TEMPERATURE CONTROL WARNING ON PAGE 11. IF HIGHER
PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER
OUTPUT, ADD AN
USE THIS TABLE FOR CORRECT
PUMP AND WATER PIPE SIZE
| Minimum | B & G |
| |
Model | Pipe Size | *Armstrong | ||
Number | (Inches) | Pump | Pump Size | |
|
|
| Size |
|
| A | B |
| |
|
|
| ||
| 2" | 2" | ||
| 2" | 2" | ||
| 2" | 2" | ||
| 2" | 2" | ||
|
|
|
|
|
*Assumes 50 equivalent feet of piping or less.
FIGURE 31.
36
