Weil-McLain Ultra Oil, Manual

Page: 18 / 40

®
WATER BOILER
—
Boiler Manual
Connect water piping
Piping boiler in refrigeration systems
(Figure 12)
s )NSTALLBOILERSOTHATCHILLEDMEDIUMISPIPEDINPARALLELWITH
HEATINGBOILER5SEAPPROPRIATEVALVESTOPREVENTCHILLEDME
-
dium from entering boiler. Consult I=B=R Installation and
Piping Guides.
s )FBOILERISCONNECTEDTOHEATINGCOILSLOCATEDINAIRHANDLING
units where they can be exposed to refrigerated air, use flow
control valves or other automatic means to prevent gravity
circulation during cooling cycle.
&IGURE Piping boiler in a system with chiller
General wiring requirements
%LECTRICSHOCKHAZARD . Can cause severe personal
injury or death if power source, including service
switch on boiler, is not disconnected before install-
ing or servicing.
Installations must follow these codes:
s 5NITED3TATES
.ATIONAL%LECTRICAL#ODE!.3).&0!LATESTEDITIONAND
any additional national, state or local codes.
s #ANADA
#3! # #ANADIAN %LECTRICAL #ODE 0ART AND ANY LOCAL
codes.
Electrical
knockouts
Terminal strip
Control Pod cover
UO018
Remove cover for
unrestricted access to
wiring compartment.
Conduits,
typical
&IGURE
Terminal strip access
Connect wiring
Wire requirements
s 7IRINGMUSTBE.%##LASS
s )FORIGINALWIRESUPPLIEDWITHBOILERMUSTBEREPLACEDTYPE
105 °C wire or equivalent must be used.
s 3UPPLYWIRING
s "OILERONLYˆGAUGEORHEAVIER
s "OILERWITHOPTIONAL!&-ˆGAUGEORHEAVIER
Electrical requirements
s "OILERSNOTEQUIPPEDWITHAN!&-CANBESUPPLIEDBYA
amp service.
s "OILERSEQUIPPEDWITHAN!&-REQUIREAAMPSERVICE
Electrical grounding
s 0ROVIDEELECTRICALGROUNDATBOILERASREQUIREDBYCODES
Wiring entrances (see Figure 13)
Terminal strip access
s 2EMOVETHETWORETAINERSCREWSINTHEJACKETTOPPANELATREAR
of the boiler) and remove the jacket top panel.
s 2ELEASETHE#ONTROL0ODCOVERBYLOOSENINGTHERETAINERSCREW
INTHETOPCENTEROFTHECOVER3WINGTHECOVEROPENTOREVEAL
the boiler terminal strip.
(continued)
Connect wiring
Part number 550-141-986/0112
18