ECR International UTICA HEATING UH15B-K Installation, Operation & Maintenance Manual page 15

Figure 4-6 - Bypass Piping - Fixed Low Temp Only With Zone Valve
4 - CONNECTING SUPPLY & RETURN PIPING
PIPING LEGEND:
BACK FLOW VALVE
*
ASME
RELIEF
VALVE
Drain
Valve
*
Manually adjust until proper system
temperature is reached.
15
*
Drain
Valve
PN 240013259 Rev. D [08/15/2021]