Cabinet Heater G*Y/D*Y Series
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
13
SECTION ONE — Installation, Cont'd.
Label each tube extension for purpose, i.e:
"HS" for Heating Supply, etc. Solder tube
extensions to the valve package.
2. Remove valve actuators temporarily during
valve installation. Protect unit wiring from
damage.
3. Install valve package.
4. Torque unions tight using backup wrench to
prevent damage to coil tubes. Align exiting
tubes to the center of the pipe openings.
5. If desired, apply split bushings or grommets
(provided by others) to the pipes for
mechanical support and protection. Do not
allow copper tube to contact steel cabinet.
6. Now is a good time to leak test the unions
and fittings, using air pressure and soap. The
coil air vent(s) may be used for this purpose.
Figure 13. General valve package assembly. DXY unit shown.
After the connections are completed, the system
should then be tested for leaks. Since some
components are not designed to hold pressure with
a gas, hydronic systems should be tested with water.
Pressure testing should be completed prior to sheet
rocking or painting.
CAUTION: All water coils must be protected
from freezing after initial filling with water. Even
if the system is drained, unit coils may still hold enough
water to cause damage when exposed to temperatures
below freezing.
In the event that leaking or defective components are
discovered, the Sales Representative must be notified
BEFORE any repairs are attempted. All leaks should be
repaired before proceeding with the installation.
After system integrity has been established, insulate the
piping in accordance with the project specifications. This is
the responsibility of the installing or insulation contractor.
Electrical Connections
The electrical service to the unit should be compared to
the unit nameplate to verify compatibility. The routing
and sizing of all piping, and the type and sizing of all
wiring and other electrical components such as circuit
breakers, disconnect switches, etc. should be determined
by the individual job requirements. Verify the electrical
conductor size is suitable for the distance to the equipment
connection and will support the equipment electrical load.
All installations should be made in compliance with all
governing codes and ordinances. Compliance with all codes
is the responsibility of the installing contractor.
The unit serial plate lists the unit electrical characteristics
such as the required supply voltage, fan and heater
amperage and required circuit ampacities. The unit wiring
diagram shows all unit and field wiring. Since each project
is different and each unit on a project may be different,
the installer must be familiar with the wiring diagram and
serial plate on the unit BEFORE beginning any wiring.
All components furnished for field installation by either the
factory or the controls contractor should be located and
checked for proper function and compatibility. All internal
components should be checked for shipping damage, and
any loose connections should be tightened to minimize
problems during start-up.
Any devices such as fan switches or thermostats that
have been furnished from the factory for field installation
must be wired in strict accordance with the wiring
diagram that appears on the unit. Failure to do so could
result in personal injury or damage to components and will
void all manufacturer’s warranties.
