Water Piping And Trim - New Yorker FR-HGS Series Installation, Operating And Service Instructions

4

Water Piping and Trim

Failure to properly pipe boiler may result in improper operation and damage to boiler or structure.
Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components, and can lead to
boiler failure. New Yorker's Standard Warranty does not cover problems caused by oxygen contamination of
boiler water or scale (lime) build-up caused by frequent addition of water.
A. DESIGN A PIPING SYSTEM and install boiler
which will prevent oxygen contamination of boiler
water and frequent water additions.
1. There are many possible causes of oxygen
contamination such as:
a. Addition of excessive make-up water as a
result of system leaks.
b. Absorption through open tanks and fittings.
c. Oxygen permeable materials in the
distribution system.
2. In order to insure long product life, oxygen
sources should be eliminated. This can
be accomplished by taking the following
measures:
a. Repairing system leaks to eliminate the
need for addition of make-up water.
b. Eliminating open tanks from the system.
c. Eliminating and/or repairing fittings which
allow oxygen absorption.
d. Use of non-permeable materials in the
distribution system.
e. Isolating the boiler from the system water by
installing a heat exchanger.
3. Connect System supply and return piping
to boiler. See Figures 4-2 and 4-3. Also,
consult I=B=R "Residential Hydronic Heating
Installation and Design Guide". Maintain
minimum ½ inch clearance from hot water
piping to combustible materials.
NOTICE: System supply and return piping must
be connected to correct boiler pipe.
New Yorker recommends sizing the system
®
circulator to supply sufficient flow (GPM) to allow a
20°F temperature differential in the system. When
sizing the system circulator, the pressure drop of
all radiators, baseboard and radiant tubing and all
connecting piping must be considered.
a. If this boiler is used in connection with
refrigeration systems, the boiler must be
installed so that the chilled medium is piped
in parallel with the heating boiler using
appropriate valves to prevent the chilled
12
FR
!
WARNING
medium from entering the boiler. See Figure
4-1. Also, consult I=B=R "Residential
Hydronic Heating Installation and Design
Guide".
Figure 4-1: Recommended Piping for Combination
Heating and Cooling (Refrigeration) System
b. If this boiler is connected to heating coils
located in air handling units where they may
be exposed to refrigerated air, the boiler
piping must be equipped with flow control
valves to prevent gravity circulation of boiler
water during the operation of the cooling
system.
c. If boiler is used with an Indirect-Fired
Domestic Hot Water Heater, install the
Indirect-Fired Domestic Hot Water Heater
as a separate heating zone. Refer to
the Indirect-Fired Domestic Hot Water
Heater Installation, Operating, and Service
Instructions for additional information.
d. Use a system bypass if the boiler is
to be operated in a system which has
a large volume or excessive radiation
where low boiler water temperatures may
be encountered (i.e. converted gravity
circulation system, etc.) The bypass
should be the same size as the supply
and return lines with valves located in the
bypass and return line as illustrated in
Figures 4-2 and 4-3 in order to regulate
Installation & Service Manual
111079-01 - 12/20