ECR International 100F, Application Manual

6

PN 240012875 REV. D [03/15/2022]

GENERAL INFORMATION - HYDRONIC PIPING

 WARNING

Burn and scald hazard! Manufacturer requires 

installation  of  field  supplied  anti-scald  valve.                       

Failure to follow these instructions could result in 

death or serious injury.

!

FOR YOUR SAFETY READ BEFORE OPERATING

DANGER

!

Hot Water Can Scald!

Water heated to temperature for clothes 

washing, dish washing and other sanitizing needs 

can scald and cause permanent injury.

Children, elderly, and infirmed or physically 

handicapped persons are more likely to be 

permanently injured by hot water. Never leave 

them unattended in bathtub or shower. Never 

allow small children to use a hot water tap or 

draw their own bath.

If anyone using hot water in the building fits the 

above description, or if state laws or local codes 

require certain water temperatures at hot water 

taps, you must take special precautions:

•  Use lowest possible temperature setting.
•  Install some type of tempering device, such 

as an automatic mixing valve, at hot water 

tap or water heater. Automatic mixing valve 

must be selected and installed according  

to manufacturer's recommendations and  

instructions.

•  Water passing out of drain valves may be 

extremely hot. To avoid injury:

◊ 

 Make sure all connections are tight.

◊ 

 Direct water flow away from any person.

General Information:

Piping installation, materials, and joining methods shall 

conform to requirements of authority having jurisdiction or 

in absence of such requirements:

• USA 

- National Fuel Gas Code, ANSI Z223.1/NFPA 54

• Canada

 - Natural Gas and Propane Installation Code, 

CAN/CSA B149.1

Manufacturer Requirements/Recommendations:

•  Manufacturer requires all domestic 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.

•  Use a water filter on potable incoming water supply 

line.

•  Manufacturer recommends use of a magnetic dirt 

separator in the hydronic system where there are 

cast iron or steel components, or where the previous 

boiler was a cast iron heat exchanger.  The abrasive, 

extremely fine sediment is difficult to remove and can 

deposit onto heat exchanger surfaces and accumulate 

in pump cavities causing reduced efficiency and 

premature wear.

•  If the piping manifold is not used the ASME 

temperature and pressure relief valve and 

temperature and pressure gauge shall be installed 

to conform to requirements of the authority having 

jurisdiction. Refer to appropriate manufacturer 

instructions for installation requirements.

•  If the piping manifold is not used, a primary / 

secondary piping arrangement is manufacturer 

required, unless using Buffer Tank. A maximum of 

12 in of separation between the supply and return 

pipe (closely spaced tees) of the boiler shall be 

maintained.  Limit combined supply and return pipe 

lengths to maximum linear lengths of 20 ft (6.1 

m) between boiler and closely spaced tees, when 

minimum ¾ in NPT pipe size is used.  Linear length 

may be increased if supply and return pipe size is 

increased to limit pressure drop.

•  Manufacturer recommends installing a shutoff 

and purge valve to use during commissioning to 

ensure the boiler does not shut down due to over 

temperature.  Do not install shutoff between boiler 

and LWCO or pressure relief valve.