ECR International Utica Boilers UB90-50 Installation, Operation & Maintenance Manual page 16

NEAR BOILER PIPING
Figure 6 - Piping Primary/Secondary Multi Zone System Piping With Zone Valves And
Domestic Hot Water (With Zone Valve)
ZONE 1 (PRIORITY ZONE)*
* USE FULL PORT ZONE
VALVE.
FOR OPTIMUM TANK
PERFORMANCE,
CONSIDER USING ZONE
CIRCULATOR.
MAX = 4 X DIAMETER
CLOSLEY - SPACED
TEES
BOILER
PUMP
16
P/N 240010135 Rev. D [04/15/2017]