Tapping | Size | Water Boiler | |
Location | (in) | ||
| |||
A | 4 | Supply | |
|
|
| |
B | 4 | Plug | |
|
|
| |
C | 3 | Return | |
|
|
| |
D | 3 | Plug | |
Return | |||
|
| ||
E | 3 | ||
|
|
| |
F | 3 | Plug | |
|
|
| |
G | Relief Valve | ||
|
|
| |
J1 | 1 | Plug | |
|
|
|
Tapping | Size | Water Boiler | |
Location | (in) | ||
| |||
J2 | 1 | Plug | |
|
|
| |
K | 3/4 | Probe L.W.C.O. | |
|
|
| |
M | 3/4 | Operating Temperature | |
Limit Control | |||
|
| ||
N | 3/4 | Hi Temperature | |
Limit Control/Manual Reset | |||
|
| ||
P | 1/2 | Plug | |
|
|
| |
Q | 1/2 | Temperature/Pressure Gauge | |
(Bush to 1/4") | |||
|
| ||
S | 3/4 | Tankless Heater Control | |
|
|
| |
T | 3/4 | Firing Rate Temperature Control | |
|
|
|
Figure 26a: Purpose of Tappings - Water Boilers
30
