ECR International 075 97gb, Installation, Operation & Maintenance Manual

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Systems with automatic fi ll valves require back fl ow •
prevention device.
Install discharge piping from safety relief valve. See
•
fi gure 5-2.
Use ¾" or larger pipe. •
Use pipe suitable for temperatures of 375°F (191°C) •
or greater.
Individual boiler discharge piping shall be independent
•
of other discharge piping.
Size and arrange discharge piping to avoid reducing
•
safety relief valve relieving capacity below minimum
relief valve capacity stated on rating plate.
Run pipe as short and straight as possible to location
•
protecting user from scalding and properly drain
piping.
Install union, if used, close to safety relief valve outlet.
•
Install elbow(s), if used, close to safety relief valve •
outlet and downstream of union (if used).
Terminate pipe with plain end (not threaded). •
5.4 Trim Piping
Supply and Return Piping •
Supply - Select either top, bottom or both. •
Return - Select either top, bottom, or both. •
Use second temperature pressure gauge when piping •
top and bottom.
Install brass plug(s) provided with boiler in unused
•
tapping(s). Use provided sealant.
Temperature - Pressure Gauge. Install temperature •
pressure gauge using nipple, bushing and tee provided
with boiler. See fi gure 5-3.
5.5 System Piping
Single boiler system. See fi gures 5-4, 5-5, 5-6, 5-7 for •
general guidance. Additional considerations:
Control system designed for single central heating •
pump. Installer responsible for integration of
multiple central heating pumps.
Control system allows domestic hot water
•
prioritization. Function could be lost if central
heating pump not directly connected to control
system.
Multiple boiler system. See fi gure 5-8 for general •
guidance. Additional considerations:
Control system requires equivalent water •
temperatures entering each boiler to properly
sequence and adjust system supply temperature.
Install multi boiler sensor kit. See "Parts, Kits &
•
Optional Accessories" manual for part number.
5 - HYDRONIC PIPING
FIGURE 5-3 Temperature Pressure Gauge
Installation
Temperature Pressure Gauge
shown at Optional Bottom
Supply Connection to Boiler
FIGURE 5-2 Safety Relief Valve Discharge Piping
Check Local Codes
For Maximum
Distance To Floor
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!