37
1. Models APX425 and APX525 (see Figure
19A “Factory Supplied Piping and Trim
Installation - APX425 and APX525”)
a. Locate and remove ¾ in. NPT x close black
nipple, ¾ in. NPT x 12 in. black nipple, ¾ in.
NPT black tee, ¾ in. FPT x ¾ in. FPT safety
relief valve and ¾ in. NPT drain valve.
b. Install close nipple into tee branch. Then, screw
the assembly into boiler left side front ¾ in.
FPT tapping, making sure tee run outlets are in
vertical plane and parallel to boiler side.
c. Install the ¾ in. NPT x 12 in. black nipple into
tee run top outlet.
d. Mount ¾ in. FPT x ¾ in. FPT safety relief valve
onto 12 in. nipple.
A. Installation of Factory Supplied Piping and
Trim Components
Apex boilers have factory supplied Miscellaneous Parts
Carton, which includes packaged flow switch with two
boiler-specific paddles, supply piping components, gas
piping components, temperature & pressure gauge,
safety relief valve and drain valve. See Figure 19A, 19B
or 19C “Factory Supplied Piping and Trim Installation”.
Install these components prior to connecting boiler
to system piping as follows:
VI. Water Piping and Trim
Figure 19A: Factory Supplied Piping and Trim Installation - APX425 and APX525
NOTICE
Failure to properly pipe boiler may result in improper operation and damage to boiler or structure.
Install boiler so that the gas ignition system components are protected from water (dripping, spraying,
rain, etc.) during appliance operation and service (circulator replacement, etc.).
Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components, and
can lead to boiler failure. Thermal Solutions’ Standard Warranty does not cover problems caused by
oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water.
Do not fill boiler with softened water to prevent chloride contamination.
Installation is not complete unless a safety relief valve is installed into the tapping located on left side
of appliance or the supply piping.
Boiler
Model
Miscellaneous
Parts Carton
APX425
102942-05
APX525
APX625
104520-01
APX725
APX825
103259-02
Summary of Contents for APEX
Page 57: ...57 VIII Electrical continued Figure 26 Ladder Diagram ...
Page 58: ...58 VIII Electrical continued ...
Page 59: ...59 Figure 27 Wiring Connections Diagram VIII Electrical continued ...
Page 105: ...105 ...
Page 109: ...109 XIII Repair Parts continued APX625 APX725 and APX825 APX825 shown ...
Page 112: ...112 XIII Repair Parts continued APX425 and APX525 ...
Page 114: ...114 XIII Repair Parts continued APX625 APX725 and APX825 ...
Page 122: ...122 ...
Page 123: ...123 ...
