ECR International UTICA HEATING UH15B-K Installation, Operation & Maintenance Manual page 18

Figure 4-9 - Multi Zone System With Zone Valves And DHW Priority (With Zone Valve)
Optional
Indirect
DHW Tank
DHW Pump
CH /System
Pump
Make-up
Water
Supply
* Manufacturer requires all domestic
Note
hot water (DHW) installations use
an anti-scald valve. Local codes
may require additional equipment
(expansion tank, relief valves,
etc.) Select and size equipment
to suit installation and meet code
requirements.
12" (305mm) Recommended
Note
1
distance. Do not exceed 12".
Refer to pump manufacturer
literature for proper pump sizing.
4 - CONNECTING SUPPLY AND RETURN PIPING
BACK FLOW VALVE
Tank
Sensor
T & P Relief
Back Flow Valve
PIPING LEGEND:
Water
Supply
Tempered
Cold
Valve to Water
Drain Supply
ASME
Relief
Valve
18
* Hot
1
Drain
Valve
PN 240013259 Rev. D [08/15/2021]